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<!-- Weave of 'Unicode Literals' 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 > Unicode Literals< / b > < / li > < / ul > < / div >
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< p class = "purpose" > To manage the names assigned to Unicode character values.< / p >
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< p class = "commentary firstcommentary" > < a id = "SP1" class = "paragraph-anchor" > < / a > < b > § 1. < / b > The following is called only on excerpts from the source where it is a
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fairly safe bet that a Unicode character is referred to. For example, when
the player types either of these:
< / p >
< blockquote >
< p > "[unicode 321]odz Churchyard"< / p >
< / blockquote >
< blockquote >
< p > "[unicode Latin capital letter L with stroke]odz Churchyard"< / p >
< / blockquote >
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< p class = "commentary" > ...then the text after the word "unicode" is parsed by < s-unicode-character> .
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< / p >
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< pre class = "Preform-displayed-code all-displayed-code code-font" >
< span class = "Preform-function-syntax" > < s-unicode-character> < / 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" > < cardinal-number-unlimited> < / 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" > { -, Rvalues::from_Unicode(UnicodeLiterals::max(R[1]), W) }< / span >
< span class = "Preform-plain-syntax" > < / span > < span class = "Preform-function-syntax" > < unicode-character-name> < / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > ==> < / span > < span class = "Preform-plain-syntax" > { -, Rvalues::from_Unicode(R[1], W) }< / span >
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< span class = "Preform-function-syntax" > < unicode-character-name> < / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-constant-syntax" > internal< / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-constant-syntax" > {< / span >
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< span class = "Preform-plain-syntax" > < / span > < span class = "Preform-identifier-syntax" > parse_node< / span > < span class = "Preform-plain-syntax" > *< / span > < span class = "Preform-identifier-syntax" > p< / span > < span class = "Preform-plain-syntax" > = < / span > < span class = "Preform-identifier-syntax" > Lexicon::retrieve< / span > < span class = "Preform-plain-syntax" > (< / span > < span class = "Preform-identifier-syntax" > MISCELLANEOUS_MC< / span > < span class = "Preform-plain-syntax" > , < / span > < span class = "Preform-identifier-syntax" > W< / span > < span class = "Preform-plain-syntax" > );< / span >
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< span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > if< / span > < span class = "Preform-plain-syntax" > ((< / span > < span class = "Preform-identifier-syntax" > p< / span > < span class = "Preform-plain-syntax" > ) & & (< / span > < span class = "Preform-identifier-syntax" > Node::get_type< / span > < span class = "Preform-plain-syntax" > (< / span > < span class = "Preform-identifier-syntax" > p< / span > < span class = "Preform-plain-syntax" > ) == < / span > < span class = "Preform-identifier-syntax" > PROPER_NOUN_NT< / span > < span class = "Preform-plain-syntax" > )) {< / span >
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< span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > int< / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-identifier-syntax" > N< / span > < span class = "Preform-plain-syntax" > = < / span > < span class = "Preform-identifier-syntax" > Vocabulary::get_literal_number_value< / span > < span class = "Preform-plain-syntax" > (< / span >
< span class = "Preform-plain-syntax" > < / span > < span class = "Preform-identifier-syntax" > Lexer::word< / span > < span class = "Preform-plain-syntax" > (< / span > < span class = "Preform-identifier-syntax" > Wordings::first_wn< / span > < span class = "Preform-plain-syntax" > (< / span > < span class = "Preform-identifier-syntax" > Node::get_text< / span > < span class = "Preform-plain-syntax" > (< / span > < span class = "Preform-identifier-syntax" > p< / span > < span class = "Preform-plain-syntax" > ))));< / span >
< span class = "Preform-plain-syntax" > ==> { < / span > < span class = "Preform-identifier-syntax" > N< / span > < span class = "Preform-plain-syntax" > , - };< / span >
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< span class = "Preform-plain-syntax" > < / span > < span class = "Preform-reserved-syntax" > return< / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-identifier-syntax" > TRUE< / span > < span class = "Preform-plain-syntax" > ;< / span >
< span class = "Preform-plain-syntax" > }< / span >
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< span class = "Preform-plain-syntax" > ==> { < / span > < span class = "Preform-identifier-syntax" > fail< / span > < span class = "Preform-plain-syntax" > < / span > < span class = "Preform-identifier-syntax" > nonterminal< / span > < span class = "Preform-plain-syntax" > };< / span >
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< span class = "Preform-plain-syntax" > }< / span >
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< / pre >
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< ul class = "endnotetexts" > < li > This is < a href = "../words-module/4-ap.html" class = "internal" > Preform grammar< / a > , not regular C code.< / li > < / ul >
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< p class = "commentary firstcommentary" > < a id = "SP2" class = "paragraph-anchor" > < / a > < b > § 2. < / b > And here is the range check:
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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" > int< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > UnicodeLiterals::max< / 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" > UnicodeLiterals::max< / span > < / span > :< br / > < a href = "3-ul.html#SP1" > § 1< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > cc< / 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" > cc< / span > < span class = "plain-syntax" > < < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ) || (< / span > < span class = "identifier-syntax" > cc< / span > < span class = "plain-syntax" > > = < / span > < span class = "constant-syntax" > 0x10000< / span > < span class = "plain-syntax" > )) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > StandardProblems::sentence_problem< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Task::syntax_tree< / span > < span class = "plain-syntax" > (), < / span > < span class = "identifier-syntax" > _p_< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > PM_UnicodeOutOfRange< / span > < span class = "plain-syntax" > ),< / span >
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< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "Inform can only handle Unicode characters in the 16-bit range"< / span > < span class = "plain-syntax" > ,< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "from 0 to 65535."< / 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 = "constant-syntax" > 65< / 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" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > cc< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > }< / span >
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< / pre >
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