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<!-- Weave of 'Setting Property Relation' generated by Inweb -->
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< ul class = "crumbs" > < li > < a href = "../index.html" > Home< / a > < / li > < li > < a href = "../compiler.html" > Inform7 Modules< / a > < / li > < li > < a href = "index.html" > core< / a > < / li > < li > < a href = "index.html#15" > Chapter 15: Properties< / a > < / li > < li > < b > Setting Property Relation< / b > < / li > < / ul > < / div >
< p class = "purpose" > Each value property has an associated relation to set its value.< / p >
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< ul class = "toc" > < li > < a href = "15-spr2.html#SP1" > § 1. Initial stock< / a > < / li > < li > < a href = "15-spr2.html#SP2" > § 2. Subsequent creations< / a > < / li > < li > < a href = "15-spr2.html#SP7" > § 7. Second stock< / a > < / li > < li > < a href = "15-spr2.html#SP9" > § 9. Typechecking< / a > < / li > < li > < a href = "15-spr2.html#SP10" > § 10. Assertion< / a > < / li > < li > < a href = "15-spr2.html#SP11" > § 11. Compilation< / a > < / li > < li > < a href = "15-spr2.html#SP13" > § 13. Problem message text< / a > < / li > < / ul > < hr class = "tocbar" >
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< p class = "commentary firstcommentary" > < a id = "SP1" > < / a > < b > § 1. Initial stock. < / b > There is no initial stock of these, since there are no value properties yet
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when Inform starts up.
< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Properties::SettingRelations::REL_create_initial_stock< / 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" > Properties::SettingRelations::REL_create_initial_stock< / span > < / span > :< br / > Binary Predicates - < a href = "7-bp.html#SP44" > § 44< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > void< / 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 = "SP2" > < / a > < b > § 2. Subsequent creations. < / b > Relations like this lead to a timing problem, because we have to create the
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relation early enough that we can make sense of the sentences in the source
text; but at that early time, the properties haven't been created yet. We
therefore store the text of the property name (say, "weight") in
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< span class = "extract" > < span class = "extract-syntax" > property_pending_text< / span > < / span > and come back to it later on.
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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" > binary_predicate< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Properties::SettingRelations::make_set_property_BP< / 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" > Properties::SettingRelations::make_set_property_BP< / span > < / span > :< br / > < a href = "15-spr2.html#SP6" > § 6< / a > < br / > New Verb Requests - < a href = "4-nvr.html#SP5_3" > § 5.3< / a > < br / > Valued Properties - < a href = "15-vp.html#SP4" > § 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" > binary_predicate< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > = < / span > < a href = "7-bp.html#SP27" class = "function-link" > < span class = "function-syntax" > BinaryPredicates::make_pair< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "constant-syntax" > PROPERTY_SETTING_KBP< / span > < span class = "plain-syntax" > ,< / span >
< span class = "plain-syntax" > < / span > < a href = "7-bp.html#SP17" class = "function-link" > < span class = "function-syntax" > BinaryPredicates::new_term< / span > < / a > < span class = "plain-syntax" > (< / span > < a href = "13-kak.html#SP1" class = "function-link" > < span class = "function-syntax" > Kinds::Knowledge::as_subject< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > K_object< / span > < span class = "plain-syntax" > )),< / span >
< span class = "plain-syntax" > < / span > < a href = "7-bp.html#SP17" class = "function-link" > < span class = "function-syntax" > BinaryPredicates::new_term< / span > < / a > < 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" > I< / span > < span class = "string-syntax" > "set-property"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > WordAssemblages::lit_0< / span > < span class = "plain-syntax" > ());< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > property_pending_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 = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > reversal< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > property_pending_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" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > bp< / 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 = "SP3" > < / a > < b > § 3. < / b > Meanwhile, we can't look up the BP with reference to the property, since
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the property may not exist yet; we have to use the text of the name of the
property as a key, clumsy as that may seem.
< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "reserved-syntax" > binary_predicate< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Properties::SettingRelations::find_set_property_BP< / 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" > Properties::SettingRelations::find_set_property_BP< / span > < / span > :< br / > Valued Properties - < a href = "15-vp.html#SP4" > § 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 >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > binary_predicate< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > bp< / 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" > bp< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > binary_predicate< / 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::match< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > property_pending_text< / 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" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > right_way_round< / 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" > bp< / 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 = "SP4" > < / a > < b > § 4. < / b > ...And now it's "later on". We fix these BPs in original-reversal pairs, so
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that the two can never fall out of step.
< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Properties::SettingRelations::fix_property_bp< / 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" > Properties::SettingRelations::fix_property_bp< / span > < / span > :< br / > < a href = "15-spr2.html#SP7" > § 7< / a > < br / > Relation Knowledge - < a href = "5-rk.html#SP1_1" > § 1.1< / a > < br / > Valued Properties - < a href = "15-vp.html#SP4" > § 4< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > binary_predicate< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > binary_predicate< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > bpr< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > reversal< / span > < span class = "plain-syntax" > ;< / 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" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > property_pending_text< / 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::nonempty< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > )) {< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > property_pending_text< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > EMPTY_WORDING< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > bpr< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > property_pending_text< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > EMPTY_WORDING< / 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" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > bp_created_at< / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "function-syntax" > < relation-property-name> < / 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 = "function-syntax" > < < r> > < / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > FALSE< / span > < span class = "plain-syntax" > ) < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > ; < / span > < span class = "comment-syntax" > a problem was issued< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > property< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > prn< / span > < span class = "plain-syntax" > = < / span > < span class = "function-syntax" > < < rp> > < / span > < span class = "plain-syntax" > ;< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > set_property< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > prn< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > bpr< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > set_property< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > prn< / 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" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > right_way_round< / span > < span class = "plain-syntax" > ) < / span > < a href = "15-spr2.html#SP8" class = "function-link" > < span class = "function-syntax" > Properties::SettingRelations::set_property_BP_schemas< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > prn< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > < / span > < a href = "15-spr2.html#SP8" class = "function-link" > < span class = "function-syntax" > Properties::SettingRelations::set_property_BP_schemas< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > bpr< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > prn< / 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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< p class = "commentary firstcommentary" > < a id = "SP5" > < / a > < b > § 5. < / b > When properties are named as part of relation definitions, for instance, like so:
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< / p >
< blockquote >
< p > The verb to weigh (it weighs, they weigh, it is weighing) implies the weight property.< / p >
< / blockquote >
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< p class = "commentary" > ...then its name (in this case "weight") is required to pass:
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< / p >
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< pre class = "Preform-displayed-code all-displayed-code code-font" >
< span class = "Preform-function-syntax" > < relation-property-name> < / 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" > < either-or-property-name> < / 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" > < / span > < span class = "named-paragraph-container code-font" > < a href = "15-spr2.html#SP5_1" class = "named-paragraph-link" > < span class = "named-paragraph" > Issue PM_RelationWithEitherOrProperty problem< / span > < span class = "named-paragraph-number" > 5.1< / span > < / a > < / span >
< span class = "Preform-plain-syntax" > < / span > < span class = "Preform-function-syntax" > < value-property-name> < / 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, 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" > < / span > < span class = "named-paragraph-container code-font" > < a href = "15-spr2.html#SP5_2" class = "named-paragraph-link" > < span class = "named-paragraph" > Issue PM_RelationWithBadProperty problem< / span > < span class = "named-paragraph-number" > 5.2< / span > < / a > < / 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 = "SP5_1" > < / a > < b > § 5.1. < / b > < span class = "named-paragraph-container code-font" > < span class = "named-paragraph-defn" > Issue PM_RelationWithEitherOrProperty problem< / span > < span class = "named-paragraph-number" > 5.1< / span > < / span > < span class = "Preform-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 = "identifier-syntax" > StandardProblems::sentence_problem< / span > < span class = "plain-syntax" > (< / span > < a href = "1-wtc.html#SP6" class = "function-link" > < span class = "function-syntax" > Task::syntax_tree< / span > < / a > < span class = "plain-syntax" > (), < / span > < span class = "identifier-syntax" > _p_< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > PM_RelationWithEitherOrProperty< / span > < span class = "plain-syntax" > ),< / span >
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< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "verbs can only set properties with values"< / span > < span class = "plain-syntax" > ,< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "not either/or properties like this one."< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > ==> { < / span > < span class = "identifier-syntax" > FALSE< / 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 = "15-spr2.html#SP5" > § 5< / a > .< / li > < / ul >
< p class = "commentary firstcommentary" > < a id = "SP5_2" > < / a > < b > § 5.2. < / b > < span class = "named-paragraph-container code-font" > < span class = "named-paragraph-defn" > Issue PM_RelationWithBadProperty problem< / span > < span class = "named-paragraph-number" > 5.2< / span > < / span > < span class = "comment-syntax" > =< / span >
< / 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 = "identifier-syntax" > StandardProblems::sentence_problem< / span > < span class = "plain-syntax" > (< / span > < a href = "1-wtc.html#SP6" class = "function-link" > < span class = "function-syntax" > Task::syntax_tree< / span > < / a > < span class = "plain-syntax" > (), < / span > < span class = "identifier-syntax" > _p_< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > PM_RelationWithBadProperty< / span > < span class = "plain-syntax" > ),< / span >
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< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "that doesn't seem to be a property"< / span > < span class = "plain-syntax" > ,< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "perhaps because you haven't defined it yet?"< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > ==> { < / span > < span class = "identifier-syntax" > FALSE< / 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 = "15-spr2.html#SP5" > § 5< / a > .< / li > < / ul >
< p class = "commentary firstcommentary" > < a id = "SP6" > < / a > < b > § 6. < / b > No such funny business is necessary for a nameless property created within
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Inform:
< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "reserved-syntax" > binary_predicate< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > Properties::SettingRelations::make_set_nameless_property_BP< / 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" > Properties::SettingRelations::make_set_nameless_property_BP< / span > < / span > :< br / > Valued Properties - < a href = "15-vp.html#SP3" > § 3< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > property< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > prn< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > binary_predicate< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > = < / span > < a href = "15-spr2.html#SP2" class = "function-link" > < span class = "function-syntax" > Properties::SettingRelations::make_set_property_BP< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > EMPTY_WORDING< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > binary_predicate< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > bpr< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > reversal< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > set_property< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > prn< / span > < span class = "plain-syntax" > ; < / span > < span class = "identifier-syntax" > bpr< / span > < span class = "plain-syntax" > -> < / span > < span class = "identifier-syntax" > set_property< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > prn< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < a href = "15-spr2.html#SP8" class = "function-link" > < span class = "function-syntax" > Properties::SettingRelations::set_property_BP_schemas< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > prn< / 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" > bp< / 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" > < / a > < b > § 7. Second stock. < / b > The following is called after all properties have been created, making it
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the perfect opportunity to go over all of the property-setting BPs:
< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Properties::SettingRelations::REL_create_second_stock< / 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" > Properties::SettingRelations::REL_create_second_stock< / span > < / span > :< br / > Binary Predicates - < a href = "7-bp.html#SP45" > § 45< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > binary_predicate< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > bp< / 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" > bp< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > binary_predicate< / 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::nonempty< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > property_pending_text< / span > < span class = "plain-syntax" > ))< / span >
< span class = "plain-syntax" > < / span > < a href = "15-spr2.html#SP4" class = "function-link" > < span class = "function-syntax" > Properties::SettingRelations::fix_property_bp< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > bp< / 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" > < / a > < b > § 8. < / b > Note that we read and write to the property directly, without asking the
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template layer to check if the given object has permission to possess that
property. We can afford to do this because type-checking at compile time
guarantees that it does have permission, and as a result we gain some speed
and simplicity.
< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "reserved-syntax" > void< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > Properties::SettingRelations::set_property_BP_schemas< / 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" > Properties::SettingRelations::set_property_BP_schemas< / span > < / span > :< br / > < a href = "15-spr2.html#SP4" > § 4< / a > , < a href = "15-spr2.html#SP6" > § 6< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > binary_predicate< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > property< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > prn< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > test_function< / span > < span class = "plain-syntax" > =< / span >
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< span class = "plain-syntax" > < / span > < a href = "12-is.html#SP3" class = "function-link" > < span class = "function-syntax" > Calculus::Schemas::new< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "*1.%n == *2"< / span > < span class = "plain-syntax" > , < / span > < a href = "15-pr.html#SP26" class = "function-link" > < span class = "function-syntax" > Properties::iname< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > prn< / span > < span class = "plain-syntax" > ));< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > make_true_function< / span > < span class = "plain-syntax" > =< / span >
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< span class = "plain-syntax" > < / span > < a href = "12-is.html#SP3" class = "function-link" > < span class = "function-syntax" > Calculus::Schemas::new< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "*1.%n = *2"< / span > < span class = "plain-syntax" > , < / span > < a href = "15-pr.html#SP26" class = "function-link" > < span class = "function-syntax" > Properties::iname< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > prn< / span > < span class = "plain-syntax" > ));< / span >
< span class = "plain-syntax" > < / span > < a href = "7-bp.html#SP19" class = "function-link" > < span class = "function-syntax" > BinaryPredicates::set_term_domain< / span > < / a > < span class = "plain-syntax" > (& (< / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > term_details< / span > < span class = "plain-syntax" > [1]),< / span >
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< span class = "plain-syntax" > < / span > < a href = "15-vp.html#SP5" class = "function-link" > < span class = "function-syntax" > Properties::Valued::kind< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > prn< / 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 = "SP9" > < / a > < b > § 9. Typechecking. < / b > Suppose we are setting property \(P\) of subject \(S\) to value \(V\). Then the setting
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relation has terms \(S\) and \(V\). To pass typechecking, we require that \(V\) be
valid for the kind of value stored in \(P\), and that \(S\) have a kind a value
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allowing it to possess properties in general. But we don't require
that it possesses this one.
< / p >
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< p class = "commentary" > This is because we can't know whether it does or not until model completion,
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much later on, because we don't necessarily know the kind of value of \(S\).
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It might be an object which will eventually be deduced to be a room, for
instance, but hasn't been yet.
< / 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" > Properties::SettingRelations::REL_typecheck< / span > < button class = "popup" onclick = "togglePopup('usagePopup8')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup8" > Usage of < span class = "code-font" > < span class = "function-syntax" > Properties::SettingRelations::REL_typecheck< / span > < / span > :< br / > Binary Predicates - < a href = "7-bp.html#SP46" > § 46< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > binary_predicate< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > bp< / 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" > kinds_of_terms< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > kind< / span > < span class = "plain-syntax" > **< / span > < span class = "identifier-syntax" > kinds_required< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > tc_problem_kit< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > tck< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > property< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > prn< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > set_property< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > kind< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > val_kind< / span > < span class = "plain-syntax" > = < / span > < a href = "15-vp.html#SP5" class = "function-link" > < span class = "function-syntax" > Properties::Valued::kind< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > prn< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "named-paragraph-container code-font" > < a href = "15-spr2.html#SP9_1" class = "named-paragraph-link" > < span class = "named-paragraph" > Require the value to be type-safe for storage in the property< / span > < span class = "named-paragraph-number" > 9.1< / span > < / a > < / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "named-paragraph-container code-font" > < a href = "15-spr2.html#SP9_2" class = "named-paragraph-link" > < span class = "named-paragraph" > Require the subject to be able to have properties< / span > < span class = "named-paragraph-number" > 9.2< / span > < / a > < / 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" > ALWAYS_MATCH< / 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 = "SP9_1" > < / a > < b > § 9.1. < / b > The following lets just a few type-unsafe cases fall through the net. It's
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superficially attractive to reject them here, but (a) that would result in
less specific problem messages which can be issued later on, notably for
the "opposite" property of directions; and (b) we must be careful because
in assertion traverse 2 not every object yet has its final kind — for
many implicitly created objects, they have yet to be declared as room,
container and supporter.
< / p >
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< p class = "commentary" > As a result, type-unsafe property assertions do occur, and these have to
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be caught later on Inform's run.
< / p >
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< p class = "commentary" > < span class = "named-paragraph-container code-font" > < span class = "named-paragraph-defn" > Require the value to be type-safe for storage in the property< / span > < span class = "named-paragraph-number" > 9.1< / span > < / span > < span class = "comment-syntax" > =< / span >
< / p >
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< pre class = "displayed-code all-displayed-code code-font" >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > safe< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > FALSE< / 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" > compatible< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > Kinds::Compare::compatible< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > kinds_of_terms< / span > < span class = "plain-syntax" > [1], < / span > < span class = "identifier-syntax" > val_kind< / 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" > compatible< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > ALWAYS_MATCH< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > safe< / 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" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > compatible< / span > < span class = "plain-syntax" > == < / span > < span class = "identifier-syntax" > SOMETIMES_MATCH< / 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::Compare::le< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > val_kind< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K_object< / span > < span class = "plain-syntax" > ) == < / span > < span class = "identifier-syntax" > FALSE< / span > < span class = "plain-syntax" > ) < / span > < span class = "identifier-syntax" > safe< / 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" > ifdef< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > IF_MODULE< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > ((< / span > < span class = "identifier-syntax" > Kinds::Compare::eq< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > val_kind< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K_direction< / span > < span class = "plain-syntax" > )) ||< / span >
< span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Kinds::Compare::eq< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > val_kind< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K_room< / span > < span class = "plain-syntax" > )) ||< / span >
< span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Kinds::Compare::eq< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > val_kind< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K_container< / span > < span class = "plain-syntax" > )) ||< / span >
< span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Kinds::Compare::eq< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > val_kind< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K_supporter< / span > < span class = "plain-syntax" > ))) < / span > < span class = "identifier-syntax" > safe< / 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" > endif< / 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" > safe< / 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" > LOG< / span > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "Property value given as %u not %u\n"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > kinds_of_terms< / span > < span class = "plain-syntax" > [1], < / span > < span class = "identifier-syntax" > val_kind< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < a href = "2-sq.html#SP3" class = "function-link" > < span class = "function-syntax" > Problems::quote_kind< / span > < / a > < span class = "plain-syntax" > (4, < / span > < span class = "identifier-syntax" > kinds_of_terms< / span > < span class = "plain-syntax" > [1]);< / span >
< span class = "plain-syntax" > < / span > < a href = "2-sq.html#SP3" class = "function-link" > < span class = "function-syntax" > Problems::quote_kind< / span > < / a > < span class = "plain-syntax" > (5, < / span > < span class = "identifier-syntax" > val_kind< / 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" > kinds_of_terms< / span > < span class = "plain-syntax" > [1]) == < / span > < span class = "identifier-syntax" > CON_property< / span > < span class = "plain-syntax" > )< / span >
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< span class = "plain-syntax" > < / span > < a href = "2-si.html#SP6" class = "function-link" > < span class = "function-syntax" > StandardProblems::tcp_problem< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > _p_< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > PM_PropertiesEquated< / span > < span class = "plain-syntax" > ), < / span > < span class = "identifier-syntax" > tck< / span > < span class = "plain-syntax" > ,< / span >
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< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "that seems to say that two different properties are the same - "< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "like saying 'The indefinite article is the printed name': that "< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "might be true for some things, some of the time, but it makes no "< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "sense in a general statement like this one."< / span > < span class = "plain-syntax" > );< / span >
< 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" > prn< / 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 > < a href = "2-si.html#SP6" class = "function-link" > < span class = "function-syntax" > StandardProblems::tcp_problem< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > _p_< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > PM_UnknownPropertyType< / span > < span class = "plain-syntax" > ), < / span > < span class = "identifier-syntax" > tck< / span > < span class = "plain-syntax" > ,< / span >
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< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "that tries to set the value of an unknown property to %4."< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > else< / span > < span class = "plain-syntax" > {< / span >
< span class = "plain-syntax" > < / span > < a href = "2-sq.html#SP2" class = "function-link" > < span class = "function-syntax" > Problems::quote_property< / span > < / a > < span class = "plain-syntax" > (6, < / span > < span class = "identifier-syntax" > prn< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < a href = "2-si.html#SP6" class = "function-link" > < span class = "function-syntax" > StandardProblems::tcp_problem< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > _p_< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > PM_PropertyType< / span > < span class = "plain-syntax" > ), < / span > < span class = "identifier-syntax" > tck< / span > < span class = "plain-syntax" > ,< / span >
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< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "that tries to set the value of the '%6' property to %4 - which "< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "must be wrong because this property has to be %5."< / span > < span class = "plain-syntax" > );< / 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" > NEVER_MATCH< / 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 = "15-spr2.html#SP9" > § 9< / a > .< / li > < / ul >
< p class = "commentary firstcommentary" > < a id = "SP9_2" > < / a > < b > § 9.2. < / b > < span class = "named-paragraph-container code-font" > < span class = "named-paragraph-defn" > Require the subject to be able to have properties< / span > < span class = "named-paragraph-number" > 9.2< / span > < / span > < span class = "comment-syntax" > =< / span >
< / 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 > < a href = "13-kak.html#SP2" class = "function-link" > < span class = "function-syntax" > Kinds::Knowledge::has_properties< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > kinds_of_terms< / span > < span class = "plain-syntax" > [0]) == < / 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" > LOG< / span > < span class = "plain-syntax" > (< / span > < span class = "string-syntax" > "Property value for impossible domain %u\n"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > kinds_of_terms< / span > < span class = "plain-syntax" > [0]);< / span >
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< span class = "plain-syntax" > < / span > < a href = "2-sq.html#SP3" class = "function-link" > < span class = "function-syntax" > Problems::quote_kind< / span > < / a > < span class = "plain-syntax" > (4, < / span > < span class = "identifier-syntax" > kinds_of_terms< / span > < span class = "plain-syntax" > [0]);< / span >
< span class = "plain-syntax" > < / span > < a href = "2-sq.html#SP2" class = "function-link" > < span class = "function-syntax" > Problems::quote_property< / span > < / a > < span class = "plain-syntax" > (5, < / span > < span class = "identifier-syntax" > prn< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < a href = "2-si.html#SP6" class = "function-link" > < span class = "function-syntax" > StandardProblems::tcp_problem< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > _p_< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > BelievedImpossible< / span > < span class = "plain-syntax" > ), < / span > < span class = "identifier-syntax" > tck< / span > < span class = "plain-syntax" > ,< / span >
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< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "that tries to set the property '%5' for %4. Values of that kind "< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "are not allowed to have properties. (Some kinds of value are, "< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "some aren't - see the Kinds index for details. It's a matter "< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "of what is practical in terms of how much memory is needed.)"< / 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" > NEVER_MATCH< / 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 = "15-spr2.html#SP9" > § 9< / a > .< / li > < / ul >
< p class = "commentary firstcommentary" > < a id = "SP10" > < / a > < b > § 10. Assertion. < / b > < / p >
< 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" > Properties::SettingRelations::REL_assert< / span > < button class = "popup" onclick = "togglePopup('usagePopup9')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup9" > Usage of < span class = "code-font" > < span class = "function-syntax" > Properties::SettingRelations::REL_assert< / span > < / span > :< br / > Binary Predicates - < a href = "7-bp.html#SP46" > § 46< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > binary_predicate< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > ,< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > inference_subject< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > infs0< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > spec0< / span > < span class = "plain-syntax" > ,< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > inference_subject< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > infs1< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > spec1< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < a href = "16-in.html#SP8" class = "function-link" > < span class = "function-syntax" > World::Inferences::draw_property< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > infs0< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > set_property< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > spec1< / 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" > TRUE< / 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 = "SP11" > < / a > < b > § 11. Compilation. < / b > We need do nothing special: these relations can be compiled from their schemas.
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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" > Properties::SettingRelations::REL_compile< / span > < button class = "popup" onclick = "togglePopup('usagePopup10')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup10" > Usage of < span class = "code-font" > < span class = "function-syntax" > Properties::SettingRelations::REL_compile< / span > < / span > :< br / > Binary Predicates - < a href = "7-bp.html#SP46" > § 46< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > task< / span > < span class = "plain-syntax" > ,< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > binary_predicate< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > annotated_i6_schema< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > asch< / span > < span class = "plain-syntax" > ) {< / 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 > < a href = "12-cad.html#SP6" class = "function-link" > < span class = "function-syntax" > Calculus::Deferrals::Cinders::kind_of_value_of_term< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > asch< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > pt0< / 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::Compare::le< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K_object< / span > < span class = "plain-syntax" > )) < / span > < span class = "reserved-syntax" > return< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > FALSE< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > property< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > prn< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > set_property< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > switch< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > task< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > case< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > TEST_ATOM_TASK:< / span >
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< span class = "plain-syntax" > < / span > < a href = "12-is.html#SP3_1" class = "function-link" > < span class = "function-syntax" > Calculus::Schemas::modify< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > asch< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > schema< / span > < span class = "plain-syntax" > ,< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "GProperty(%k, *1, %n) == *2"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > , < / span > < a href = "15-pr.html#SP26" class = "function-link" > < span class = "function-syntax" > Properties::iname< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > prn< / span > < span class = "plain-syntax" > ));< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > break< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > case< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > NOW_ATOM_FALSE_TASK:< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > break< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > case< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > NOW_ATOM_TRUE_TASK:< / span >
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< span class = "plain-syntax" > < / span > < a href = "12-is.html#SP3_1" class = "function-link" > < span class = "function-syntax" > Calculus::Schemas::modify< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > asch< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > schema< / span > < span class = "plain-syntax" > ,< / span >
< span class = "plain-syntax" > < / span > < span class = "string-syntax" > "WriteGProperty(%k, *1, %n, *2)"< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > , < / span > < a href = "15-pr.html#SP26" class = "function-link" > < span class = "function-syntax" > Properties::iname< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > prn< / span > < span class = "plain-syntax" > ));< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > break< / span > < span class = "plain-syntax" > ;< / 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" > TRUE< / 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 = "SP12" > < / a > < b > § 12. < / b > < / 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" > Properties::SettingRelations::bp_sets_a_property< / span > < button class = "popup" onclick = "togglePopup('usagePopup11')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup11" > Usage of < span class = "code-font" > < span class = "function-syntax" > Properties::SettingRelations::bp_sets_a_property< / span > < / span > :< br / > Assertions - < a href = "5-ass.html#SP6_3_34_4" > § 6.3.34.4< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > binary_predicate< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > bp< / 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" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > set_property< / span > < span class = "plain-syntax" > ) || (< / span > < span class = "identifier-syntax" > Wordings::nonempty< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > bp< / span > < span class = "plain-syntax" > -> < / span > < span class = "element-syntax" > property_pending_text< / span > < span class = "plain-syntax" > ))) < / span > < span class = "reserved-syntax" > return< / 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" > FALSE< / 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 = "SP13" > < / a > < b > § 13. Problem message text. < / b > < / 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" > Properties::SettingRelations::REL_describe_for_problems< / span > < button class = "popup" onclick = "togglePopup('usagePopup12')" > < span class = "comment-syntax" > ?< / span > < span class = "popuptext" id = "usagePopup12" > Usage of < span class = "code-font" > < span class = "function-syntax" > Properties::SettingRelations::REL_describe_for_problems< / span > < / span > :< br / > Binary Predicates - < a href = "7-bp.html#SP46" > § 46< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > OUTPUT_STREAM< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > binary_predicate< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > bp< / 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" > FALSE< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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< / pre >
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