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<!-- Weave of 'Literal Lists' generated by Inweb -->
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< ul class = "crumbs" > < li > < a href = "../index.html" > Home< / a > < / li > < li > < a href = "../inform7n.html" > Inform7< / a > < / li > < li > < a href = "index.html" > values< / a > < / li > < li > < a href = "index.html#3" > Chapter 3: Literals< / a > < / li > < li > < b > Literal Lists< / b > < / li > < / ul > < / div >
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< p class = "purpose" > Parsing and vetting the kinds of literal lists written in braces.< / p >
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< p class = "commentary firstcommentary" > < a id = "SP1" class = "paragraph-anchor" > < / a > < b > § 1. < / b > Literal lists in Inform are written in braces: for example,
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< / p >
< blockquote >
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< p > let L be {2, 12, 13};< / p >
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< / blockquote >
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< p class = "commentary" > Here "{2, 12, 13}" is parsed to an rvalue specification. Various syntactic
things can go wrong with those commas and braces, which must be detected, and
Inform must also work out the kind — here, it's "list of numbers".
< / p >
< p class = "commentary" > Note that the empty list "{}" is valid as a constant, but that it contains
no indication of its kind — this must be determined from context.
< / p >
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< p class = "commentary" > The following Preform grammar handles the syntax, at least:
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< / p >
< pre class = "Preform-displayed-code all-displayed-code code-font" >
< span class = "Preform-function-syntax" > < s-literal-list> < / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > ::=< / span >
< span class = "Preform-plain-syntax" > < / span > < span class = "Preform-constant-syntax" > \{< / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-constant-syntax" > \}< / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > |< / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > ==> < / span > < span class = "Preform-plain-syntax" > { -, Lists::at(Lists::empty_literal(Wordings::last_word(W)), W) }< / span >
< span class = "Preform-plain-syntax" > < / span > < span class = "Preform-constant-syntax" > \{< / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-function-syntax" > < list-conts> < / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-constant-syntax" > \}< / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > ==> < / span > < span class = "Preform-plain-syntax" > { -, Lists::at(RP[1], W) }< / span >
< span class = "Preform-function-syntax" > < list-conts> < / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > ::=< / span >
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< span class = "Preform-plain-syntax" > < / span > < span class = "Preform-function-syntax" > < list-entry> < / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-constant-syntax" > ,< / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-function-syntax" > < list-conts> < / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > |< / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > ==> < / span > < span class = "Preform-plain-syntax" > { 0, Lists::add(RP[1], RP[2], W, R[1]) }< / span >
< span class = "Preform-plain-syntax" > < / span > < span class = "Preform-function-syntax" > < list-entry> < / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > ==> < / span > < span class = "Preform-plain-syntax" > { 0, Lists::add(RP[1], Lists::empty_literal(W), W, R[1]) }< / span >
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< span class = "Preform-function-syntax" > < list-entry> < / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > ::=< / span >
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< span class = "Preform-plain-syntax" > < / span > < span class = "Preform-function-syntax" > < s-value> < / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > |< / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > ==> < / span > < span class = "Preform-plain-syntax" > { FALSE, RP[1] }< / span >
< span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > ......< / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > ==> < / span > < span class = "Preform-plain-syntax" > { TRUE, Specifications::new_UNKNOWN(W) }< / span >
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< / pre >
< ul class = "endnotetexts" > < li > This is < a href = "../words-module/4-ap.html" class = "internal" > Preform grammar< / a > , not regular C code.< / li > < / ul >
< p class = "commentary firstcommentary" > < a id = "SP2" class = "paragraph-anchor" > < / a > < b > § 2. < / b > And the result of this grammar, if it matches, is an rvalue made thus:
< / p >
< pre class = "displayed-code all-displayed-code code-font" >
< span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Lists::at< / span > < button class = "popup" onclick = "togglePopup('usagePopup1')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup1" > Usage of < span class = "code-font" > < span class = "function-syntax" > Lists::at< / span > < / span > :< br / > < a href = "3-ll.html#SP1" > § 1< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > L< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > wording< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < a href = "2-rvl.html#SP15" class = "function-link" > < span class = "function-syntax" > Rvalues::from_wording_of_list< / span > < / a > < span class = "plain-syntax" > (< / span > < a href = "3-ll.html#SP8" class = "function-link" > < span class = "function-syntax" > Lists::kind_of_ll< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > L< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > FALSE< / span > < span class = "plain-syntax" > ), < / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > }< / span >
< / pre >
< p class = "commentary firstcommentary" > < a id = "SP3" class = "paragraph-anchor" > < / a > < b > § 3. < / b > Each different literal list (LL) found in the source text generates an
instance of the following structure. Note that:
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< / p >
< ul class = "items" > < li > (1) every LL structure represents a syntactically well-formed list, in which
braces and commas balance; and
< / li > < li > (2) there can be at most one LL structure at any word position.
< / li > < / ul >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "reserved-syntax" > typedef< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > wording< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > unbraced_text< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > position in the source of quoted text, excluding braces< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > list_text< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > used for problem reporting only< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > listed_within_code< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > appears within a phrase, rather than (say) a table entry?< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > kind< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > entry_kind< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > i.e., of the entries, not the list< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > kinds_known_to_be_inconsistent< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > problem(s) thrown when parsing these< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > explicitly_cast< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > has reading a wider context determined the kind?< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > llist_entry< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > first_llist_entry< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > linked list of contents< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > package_request< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > ll_package< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > which will be the enclosure for...< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > inter_name< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > ll_iname< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > CLASS_DEFINITION< / span >
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< span class = "plain-syntax" > } < / span > < span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > ;< / span >
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< / pre >
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< ul class = "endnotetexts" > < li > The structure literal_list is private to this section.< / li > < / ul >
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< p class = "commentary firstcommentary" > < a id = "SP4" class = "paragraph-anchor" > < / a > < b > § 4. < / b > I believe "llath" is the Welsh word for "yard": not sure about "llist".
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "reserved-syntax" > typedef< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > llist_entry< / span > < span class = "plain-syntax" > {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > llist_entry_value< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > struct< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > llist_entry< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > next_llist_entry< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > CLASS_DEFINITION< / span >
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< span class = "plain-syntax" > } < / span > < span class = "reserved-syntax" > llist_entry< / span > < span class = "plain-syntax" > ;< / span >
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< / pre >
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< ul class = "endnotetexts" > < li > The structure llist_entry is private to this section.< / li > < / ul >
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< p class = "commentary firstcommentary" > < a id = "SP5" class = "paragraph-anchor" > < / a > < b > § 5. < / b > These structures are built incrementally, adding one < span class = "extract" > < span class = "extract-syntax" > llist_entry< / span > < / span > at a time.
They begin with a call to:
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Lists::empty_literal< / span > < button class = "popup" onclick = "togglePopup('usagePopup2')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup2" > Usage of < span class = "code-font" > < span class = "function-syntax" > Lists::empty_literal< / span > < / span > :< br / > < a href = "3-ll.html#SP1" > § 1< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > wording< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > = < / span > < a href = "3-ll.html#SP6" class = "function-link" > < span class = "function-syntax" > Lists::find_literal< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Wordings::first_wn< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > ));< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > CREATE< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > unbraced_text< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > entry_kind< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > K_nil< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > listed_within_code< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > FALSE< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > kinds_known_to_be_inconsistent< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > FALSE< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > ll_iname< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > first_llist_entry< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > explicitly_cast< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > FALSE< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > list_text< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ;< / span >
2020-08-26 12:52:50 +03:00
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > ll_package< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > Emit::current_enclosure< / span > < span class = "plain-syntax" > ();< / span >
2021-05-16 01:31:42 +03:00
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > TheHeap::ensure_basic_heap_present< / span > < span class = "plain-syntax" > ();< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< / pre >
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< p class = "commentary firstcommentary" > < a id = "SP6" class = "paragraph-anchor" > < / a > < b > § 6. < / b > Parsing is quadratic in the number of constant lists in the source text,
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which is in principle a bad thing, but in practice the following causes no
speed problems even on large-scale tests. If it becomes a problem, we can
easily trade the time spent here for memory, by attaching a pointer to
each word in the source text, or for complexity, by constructing some kind
of binary search tree.
< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Lists::find_literal< / span > < button class = "popup" onclick = "togglePopup('usagePopup3')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup3" > Usage of < span class = "code-font" > < span class = "function-syntax" > Lists::find_literal< / span > < / span > :< br / > < a href = "3-ll.html#SP5" > § 5< / a > , < a href = "3-ll.html#SP7" > § 7< / a > , < a href = "3-ll.html#SP9" > § 9< / a > , < a href = "3-ll.html#SP10" > § 10< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > incipit< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > LOOP_OVER< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > )< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Wordings::first_wn< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > unbraced_text< / span > < span class = "plain-syntax" > ) == < / span > < span class = "identifier-syntax" > incipit< / span > < span class = "plain-syntax" > )< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< / pre >
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< p class = "commentary firstcommentary" > < a id = "SP7" class = "paragraph-anchor" > < / a > < b > § 7. < / b > Note that the entry kind is initially unknown, and it's not even decided
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for sure when we add the first entry. Here's how each entry is added,
recursing right to left (i.e., reversing the direction of reading):
< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Lists::add< / span > < button class = "popup" onclick = "togglePopup('usagePopup4')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup4" > Usage of < span class = "code-font" > < span class = "function-syntax" > Lists::add< / span > < / span > :< br / > < a href = "3-ll.html#SP1" > § 1< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > wording< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > bad< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > llist_entry< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > lle< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > CREATE< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > llist_entry< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > lle< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > next_llist_entry< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > first_llist_entry< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > first_llist_entry< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > lle< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > lle< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > llist_entry_value< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > ll2< / span > < span class = "plain-syntax" > = < / span > < a href = "3-ll.html#SP6" class = "function-link" > < span class = "function-syntax" > Lists::find_literal< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Wordings::first_wn< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > ));< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ll2< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > ll2< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > unbraced_text< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > bad< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > kinds_known_to_be_inconsistent< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > TRUE< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< / pre >
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< p class = "commentary firstcommentary" > < a id = "SP8" class = "paragraph-anchor" > < / a > < b > § 8. < / b > With all the entries in place, we now have to reconcile their kinds, if
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that's possible. Problems are only issued on request, and with the current
sentence cut down to just the list itself — since otherwise we might be
printing out an entire huge table to report a problem in a single entry
which happens to be a malformed list.
< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "identifier-syntax" > kind< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Lists::kind_of_ll< / span > < button class = "popup" onclick = "togglePopup('usagePopup5')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup5" > Usage of < span class = "code-font" > < span class = "function-syntax" > Lists::kind_of_ll< / span > < / span > :< br / > < a href = "3-ll.html#SP2" > § 2< / a > , < a href = "3-ll.html#SP9" > § 9< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > issue_problems< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > explicitly_cast< / span > < span class = "plain-syntax" > ) < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Kinds::unary_con< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > CON_list_of< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > entry_kind< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > cs< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > current_sentence< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > issue_problems< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > list_text< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > )< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > list_text< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > Diagrams::new_UNPARSED_NOUN< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > unbraced_text< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > current_sentence< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > list_text< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > kind< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > K_nil< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > llist_entry< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > lle< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > for< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > lle< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > first_llist_entry< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > lle< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > lle< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > lle< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > next_llist_entry< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > lle< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > llist_entry_value< / span > < span class = "plain-syntax" > ;< / span >
2020-05-11 17:21:29 +03:00
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (!< / span > < span class = "identifier-syntax" > Node::is< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > UNKNOWN_NT< / span > < span class = "plain-syntax" > )) {< / span >
2021-03-06 01:36:25 +02:00
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > AConditions::is_action_TEST_VALUE< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > ))< / span >
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< span class = "plain-syntax" > < / span > < a href = "5-dsh.html#SP8" class = "function-link" > < span class = "function-syntax" > Dash::check_value_silently< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K_stored_action< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span >
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< span class = "plain-syntax" > < / span > < a href = "5-dsh.html#SP8" class = "function-link" > < span class = "function-syntax" > Dash::check_value_silently< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > }< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > NonlocalVariables::substitute_constants< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > kind< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > E< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "named-paragraph-container code-font" > < a href = "3-ll.html#SP8_1" class = "named-paragraph-link" > < span class = "named-paragraph" > Work out the entry kind E< / span > < span class = "named-paragraph-number" > 8.1< / span > < / a > < / span > < span class = "plain-syntax" > ;< / span >
2020-08-12 01:59:29 +03:00
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Kinds::eq< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K_nil< / span > < span class = "plain-syntax" > )) < / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > E< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "named-paragraph-container code-font" > < a href = "3-ll.html#SP8_2" class = "named-paragraph-link" > < span class = "named-paragraph" > Revise K in the light of E< / span > < span class = "named-paragraph-number" > 8.2< / span > < / a > < / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > }< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > kinds_known_to_be_inconsistent< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > K_nil< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > entry_kind< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > current_sentence< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > cs< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Kinds::unary_con< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > CON_list_of< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > }< / span >
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< / pre >
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< p class = "commentary firstcommentary" > < a id = "SP8_1" class = "paragraph-anchor" > < / a > < b > § 8.1. < / b > < span class = "named-paragraph-container code-font" > < span class = "named-paragraph-defn" > Work out the entry kind E< / span > < span class = "named-paragraph-number" > 8.1< / span > < / span > < span class = "comment-syntax" > =< / span >
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Node::is< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > UNKNOWN_NT< / span > < span class = "plain-syntax" > )) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > issue_problems< / span > < span class = "plain-syntax" > ) < / span > < span class = "named-paragraph-container code-font" > < a href = "3-ll.html#SP8_1_1" class = "named-paragraph-link" > < span class = "named-paragraph" > Issue a bad list entry problem< / span > < span class = "named-paragraph-number" > 8.1.1< / span > < / a > < / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > kinds_known_to_be_inconsistent< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > TRUE< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > E< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > } < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > ((< / span > < span class = "identifier-syntax" > Node::is< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > CONSTANT_NT< / span > < span class = "plain-syntax" > ) == < / span > < span class = "identifier-syntax" > FALSE< / span > < span class = "plain-syntax" > ) & & < / span >
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< span class = "plain-syntax" > (< / span > < a href = "2-lvl.html#SP9" class = "function-link" > < span class = "function-syntax" > Lvalues::is_constant_NONLOCAL_VARIABLE< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > ) == < / span > < span class = "identifier-syntax" > FALSE< / span > < span class = "plain-syntax" > )) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > issue_problems< / span > < span class = "plain-syntax" > ) < / span > < span class = "named-paragraph-container code-font" > < a href = "3-ll.html#SP8_1_2" class = "named-paragraph-link" > < span class = "named-paragraph" > Issue a nonconstant list entry problem< / span > < span class = "named-paragraph-number" > 8.1.2< / span > < / a > < / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > kinds_known_to_be_inconsistent< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > TRUE< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > E< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > } < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > {< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > E< / span > < span class = "plain-syntax" > = < / span > < a href = "2-spc.html#SP1" class = "function-link" > < span class = "function-syntax" > Specifications::to_kind< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > E< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > issue_problems< / span > < span class = "plain-syntax" > ) < / span > < span class = "named-paragraph-container code-font" > < a href = "3-ll.html#SP8_1_1" class = "named-paragraph-link" > < span class = "named-paragraph" > Issue a bad list entry problem< / span > < span class = "named-paragraph-number" > 8.1.1< / span > < / a > < / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > kinds_known_to_be_inconsistent< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > TRUE< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
< span class = "plain-syntax" > }< / span >
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< / pre >
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< ul class = "endnotetexts" > < li > This code is used in < a href = "3-ll.html#SP8" > § 8< / a > .< / li > < / ul >
< p class = "commentary firstcommentary" > < a id = "SP8_2" class = "paragraph-anchor" > < / a > < b > § 8.2. < / b > The following broadens K to include E, if necessary, but never narrows K.
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Thus a list containing a person, a woman and a door will see K become
successively "person", "person" (E being narrower), then "thing" (E being
incomparable, and "thing" being the max of "person" and "door").
< / p >
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< p class = "commentary" > < span class = "named-paragraph-container code-font" > < span class = "named-paragraph-defn" > Revise K in the light of E< / span > < span class = "named-paragraph-number" > 8.2< / span > < / span > < span class = "comment-syntax" > =< / span >
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > kind< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > previous_K< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > Latticework::join< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > E< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Kinds::Behaviour::definite< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > ) == < / span > < span class = "identifier-syntax" > FALSE< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > issue_problems< / span > < span class = "plain-syntax" > ) < / span > < span class = "named-paragraph-container code-font" > < a href = "3-ll.html#SP8_2_1" class = "named-paragraph-link" > < span class = "named-paragraph" > Issue a list entry kind mismatch problem< / span > < span class = "named-paragraph-number" > 8.2.1< / span > < / a > < / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > kinds_known_to_be_inconsistent< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > TRUE< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > break< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< / pre >
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< ul class = "endnotetexts" > < li > This code is used in < a href = "3-ll.html#SP8" > § 8< / a > .< / li > < / ul >
< p class = "commentary firstcommentary" > < a id = "SP8_1_1" class = "paragraph-anchor" > < / a > < b > § 8.1.1. < / b > < span class = "named-paragraph-container code-font" > < span class = "named-paragraph-defn" > Issue a bad list entry problem< / span > < span class = "named-paragraph-number" > 8.1.1< / span > < / span > < span class = "comment-syntax" > =< / span >
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Problems::quote_source< / span > < span class = "plain-syntax" > (1, < / span > < span class = "identifier-syntax" > current_sentence< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Problems::quote_wording< / span > < span class = "plain-syntax" > (2, < / span > < span class = "identifier-syntax" > Node::get_text< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > ));< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > StandardProblems::handmade_problem< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Task::syntax_tree< / span > < span class = "plain-syntax" > (),< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > _p_< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > PM_BadConstantListEntry< / span > < span class = "plain-syntax" > ));< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Problems::issue_problem_segment< / span > < span class = "plain-syntax" > (< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "The constant list %1 contains an entry '%2' which isn't any "< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "form of constant I'm able to read."< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Problems::issue_problem_segment< / span > < span class = "plain-syntax" > (< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "%PNote that lists have to be written with spaces after commas, "< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "so I like '{2, 4}' but not '{2,4}', for instance."< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Problems::issue_problem_end< / span > < span class = "plain-syntax" > ();< / span >
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< / pre >
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< ul class = "endnotetexts" > < li > This code is used in < a href = "3-ll.html#SP8_1" > § 8.1< / a > (twice).< / li > < / ul >
< p class = "commentary firstcommentary" > < a id = "SP8_1_2" class = "paragraph-anchor" > < / a > < b > § 8.1.2. < / b > < span class = "named-paragraph-container code-font" > < span class = "named-paragraph-defn" > Issue a nonconstant list entry problem< / span > < span class = "named-paragraph-number" > 8.1.2< / span > < / span > < span class = "comment-syntax" > =< / span >
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Problems::quote_source< / span > < span class = "plain-syntax" > (1, < / span > < span class = "identifier-syntax" > current_sentence< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Problems::quote_wording< / span > < span class = "plain-syntax" > (2, < / span > < span class = "identifier-syntax" > Node::get_text< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > ));< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Problems::quote_spec< / span > < span class = "plain-syntax" > (3, < / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > StandardProblems::handmade_problem< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Task::syntax_tree< / span > < span class = "plain-syntax" > (),< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > _p_< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > PM_NonconstantConstantListEntry< / span > < span class = "plain-syntax" > ));< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Problems::issue_problem_segment< / span > < span class = "plain-syntax" > (< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "The constant list %1 contains an entry '%2' which does make sense, "< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "but isn't a constant (it's %3). Only constants can appear as entries in "< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "constant lists, i.e., in lists written in braces '{' and '}'."< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Problems::issue_problem_end< / span > < span class = "plain-syntax" > ();< / span >
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< / pre >
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< ul class = "endnotetexts" > < li > This code is used in < a href = "3-ll.html#SP8_1" > § 8.1< / a > .< / li > < / ul >
< p class = "commentary firstcommentary" > < a id = "SP8_2_1" class = "paragraph-anchor" > < / a > < b > § 8.2.1. < / b > < span class = "named-paragraph-container code-font" > < span class = "named-paragraph-defn" > Issue a list entry kind mismatch problem< / span > < span class = "named-paragraph-number" > 8.2.1< / span > < / span > < span class = "comment-syntax" > =< / span >
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< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Problems::quote_source< / span > < span class = "plain-syntax" > (1, < / span > < span class = "identifier-syntax" > current_sentence< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Problems::quote_wording< / span > < span class = "plain-syntax" > (2, < / span > < span class = "identifier-syntax" > Node::get_text< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > ));< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Problems::quote_kind< / span > < span class = "plain-syntax" > (3, < / span > < span class = "identifier-syntax" > E< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Problems::quote_kind< / span > < span class = "plain-syntax" > (4, < / span > < span class = "identifier-syntax" > previous_K< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > StandardProblems::handmade_problem< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Task::syntax_tree< / span > < span class = "plain-syntax" > (),< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > _p_< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > PM_IncompatibleConstantListEntry< / span > < span class = "plain-syntax" > ));< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Problems::issue_problem_segment< / span > < span class = "plain-syntax" > (< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "The constant list %1 contains an entry '%2' whose kind is '%3', but "< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "that's not compatible with the kind I had established from looking at "< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "earlier entries ('%4')."< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Problems::issue_problem_end< / span > < span class = "plain-syntax" > ();< / span >
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< / pre >
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< ul class = "endnotetexts" > < li > This code is used in < a href = "3-ll.html#SP8_2" > § 8.2< / a > .< / li > < / ul >
< p class = "commentary firstcommentary" > < a id = "SP9" class = "paragraph-anchor" > < / a > < b > § 9. < / b > The following allow other parts of Inform to find the kind of a constant
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list at a given word position; either to discover the answer, or to force
problem messages out into the open —
< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "identifier-syntax" > kind< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Lists::kind_of_list_at< / span > < button class = "popup" onclick = "togglePopup('usagePopup6')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup6" > Usage of < span class = "code-font" > < span class = "function-syntax" > Lists::kind_of_list_at< / span > < / span > :< br / > Rvalues - < a href = "2-rvl.html#SP24_4" > § 24.4< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > wording< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > incipit< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > Wordings::first_wn< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > = < / span > < a href = "3-ll.html#SP6" class = "function-link" > < span class = "function-syntax" > Lists::find_literal< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > incipit< / span > < span class = "plain-syntax" > +1);< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > ) < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < a href = "3-ll.html#SP8" class = "function-link" > < span class = "function-syntax" > Lists::kind_of_ll< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > FALSE< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Lists::check_one< / span > < button class = "popup" onclick = "togglePopup('usagePopup7')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup7" > Usage of < span class = "code-font" > < span class = "function-syntax" > Lists::check_one< / span > < / span > :< br / > Dash - < a href = "5-dsh.html#SP13_1_1_2" > § 13.1.1.2< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > wording< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > incipit< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > Wordings::first_wn< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > = < / span > < a href = "3-ll.html#SP6" class = "function-link" > < span class = "function-syntax" > Lists::find_literal< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > incipit< / span > < span class = "plain-syntax" > +1);< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > ) < / span > < a href = "3-ll.html#SP8" class = "function-link" > < span class = "function-syntax" > Lists::kind_of_ll< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > TRUE< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > }< / span >
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< / pre >
< p class = "commentary firstcommentary" > < a id = "SP10" class = "paragraph-anchor" > < / a > < b > § 10. < / b > The interpretation of an empty list at a given position in the source is
sometimes set by the assertion machinery, so we also need:
< / p >
< pre class = "displayed-code all-displayed-code code-font" >
< span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Lists::set_kind_of_list_at< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > wording< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > kind< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Kinds::get_construct< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > ) != < / span > < span class = "identifier-syntax" > CON_list_of< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > internal_error< / span > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "not a list kind"< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > incipit< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > Wordings::first_wn< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > = < / span > < a href = "3-ll.html#SP6" class = "function-link" > < span class = "function-syntax" > Lists::find_literal< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > incipit< / span > < span class = "plain-syntax" > +1);< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > entry_kind< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > Kinds::unary_construction_material< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > internal_error< / span > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "no list appears at this point"< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > explicitly_cast< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > TRUE< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
< span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Lists::length_of_ll< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > wording< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > incipit< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > Wordings::first_wn< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > literal_list< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > = < / span > < a href = "3-ll.html#SP6" class = "function-link" > < span class = "function-syntax" > Lists::find_literal< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > incipit< / span > < span class = "plain-syntax" > +1);< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > internal_error< / span > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "no list appears at this point"< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > count< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > llist_entry< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > lle< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > for< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > lle< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > ll< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > first_llist_entry< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > lle< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > lle< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > lle< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > next_llist_entry< / span > < span class = "plain-syntax" > )< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > count< / span > < span class = "plain-syntax" > ++;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > count< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< / pre >
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< nav role = "progress" > < div class = "progresscontainer" >
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< ul class = "progressbar" > < li class = "progressprev" > < a href = "3-tt.html" > ❮ < / a > < / li > < li class = "progresschapter" > < a href = "P-wtmd.html" > P< / a > < / li > < li class = "progresschapter" > < a href = "1-vm.html" > 1< / a > < / li > < li class = "progresschapter" > < a href = "2-spc.html" > 2< / a > < / li > < li class = "progresscurrentchapter" > 3< / li > < li class = "progresssection" > < a href = "3-pl.html" > pl< / a > < / li > < li class = "progresssection" > < a href = "3-lp.html" > lp< / a > < / li > < li class = "progresssection" > < a href = "3-lrn.html" > lrn< / a > < / li > < li class = "progresssection" > < a href = "3-tod.html" > tod< / a > < / li > < li class = "progresssection" > < a href = "3-ul.html" > ul< / a > < / li > < li class = "progresssection" > < a href = "3-tt.html" > tt< / a > < / li > < li class = "progresscurrent" > ll< / li > < li class = "progresschapter" > < a href = "4-ets.html" > 4< / a > < / li > < li class = "progresschapter" > < a href = "5-dsh.html" > 5< / a > < / li > < li class = "progressnext" > < a href = "4-ets.html" > ❯ < / a > < / li > < / ul > < / div >
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< / nav > <!-- End of weave -->
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< / main >
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< / body >
< / html >
