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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" > runtime< / a > < / li > < li > < a href = "index.html#4" > Chapter 4: Enclosed Resources< / a > < / li > < li > < b > Relation Literals< / b > < / li > < / ul > < / div >
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< p class = "purpose" > In fact there is only one literal relation: the empty one, used as a default value.< / p >
< p class = "commentary firstcommentary" > < a id = "SP1" class = "paragraph-anchor" > < / a > < b > § 1. < / b > It seems odd to call it a literal, but this:
< / p >
< pre class = "displayed-code all-displayed-code code-font" >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > let< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Q< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > be< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > a< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > relation< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > of< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > numbers< / span > < span class = "plain-syntax" > ;< / span >
< / pre >
< p class = "commentary" > sets up < span class = "extract" > < span class = "extract-syntax" > Q< / span > < / span > to be a new empty relation — one in which, as yet, no number is
related to any other.
< / p >
< p class = "commentary" > The following function compiles an array ready to be < span class = "extract" > < span class = "extract-syntax" > Q< / span > < / span > , with some initial
capacity in it to absorb relationships forged at runtime. This is the default
value of kinds using the "relation of K to L" constructor.
< / p >
< p class = "commentary" > The runtime representation of temporary relations like this one is complex.
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See < a href = "5-rlt.html" class = "internal" > Relations< / a > and < a href = "../BasicInformKit/S-rlt2.html" class = "internal" > Relations (in BasicInformKit)< / a > .
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< / p >
< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "identifier-syntax" > inter_name< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > RelationLiterals::default< / 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" > RelationLiterals::default< / span > < / span > :< br / > Default Values - < a href = "2-dv.html#SP2_1" > § 2.1< / a > < / span > < / button > < 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 >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > inter_name< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > small_block< / span > < span class = "plain-syntax" > = < / span > < a href = "4-enc.html#SP2" class = "function-link" > < span class = "function-syntax" > Enclosures::new_small_block_for_constant< / span > < / a > < span class = "plain-syntax" > ();< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > packaging_state< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > save< / span > < span class = "plain-syntax" > = < / span > < a href = "2-ea.html#SP2" class = "function-link" > < span class = "function-syntax" > EmitArrays::begin_unchecked< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > small_block< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < a href = "2-th.html#SP6" class = "function-link" > < span class = "function-syntax" > TheHeap::emit_block_value_header< / span > < / a > < 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 > < span class = "constant-syntax" > 34< / span > < span class = "plain-syntax" > );< / span >
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< span class = "plain-syntax" > < / span > < a href = "2-ea.html#SP4" class = "function-link" > < span class = "function-syntax" > EmitArrays::null_entry< / span > < / a > < span class = "plain-syntax" > ();< / span >
< span class = "plain-syntax" > < / span > < a href = "2-ea.html#SP4" class = "function-link" > < span class = "function-syntax" > EmitArrays::null_entry< / span > < / a > < span class = "plain-syntax" > ();< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > TEMPORARY_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > DVT< / span > < span class = "plain-syntax" > )< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > WRITE_TO< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > DVT< / span > < span class = "plain-syntax" > , < / span > < span class = "string-syntax" > "anonymous "< / span > < span class = "plain-syntax" > ); < / span > < span class = "identifier-syntax" > Kinds::Textual::write< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > DVT< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < a href = "2-ea.html#SP4" class = "function-link" > < span class = "function-syntax" > EmitArrays::text_entry< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > DVT< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > DISCARD_TEXT< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > DVT< / span > < span class = "plain-syntax" > )< / span >
< span class = "plain-syntax" > < / span > < a href = "2-ea.html#SP4" class = "function-link" > < span class = "function-syntax" > EmitArrays::iname_entry< / span > < / a > < span class = "plain-syntax" > (< / span > < a href = "2-hrr.html#SP11" class = "function-link" > < span class = "function-syntax" > Hierarchy::find< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "constant-syntax" > TTF_SUM_HL< / span > < span class = "plain-syntax" > ));< / span >
< span class = "plain-syntax" > < / span > < a href = "2-ea.html#SP4" class = "function-link" > < span class = "function-syntax" > EmitArrays::numeric_entry< / span > < / a > < span class = "plain-syntax" > (7);< / span >
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< span class = "plain-syntax" > < / span > < a href = "5-ki.html#SP6" class = "function-link" > < span class = "function-syntax" > RTKindIDs::strong_ID_array_entry< / span > < / a > < 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" > kind< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > EK< / 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 >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Kinds::Behaviour::uses_block_values< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > EK< / span > < span class = "plain-syntax" > ))< / span >
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< span class = "plain-syntax" > < / span > < a href = "2-ea.html#SP4" class = "function-link" > < span class = "function-syntax" > EmitArrays::iname_entry< / span > < / a > < span class = "plain-syntax" > (< / span > < a href = "2-hrr.html#SP11" class = "function-link" > < span class = "function-syntax" > Hierarchy::find< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > HASHLISTRELATIONHANDLER_HL< / 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 = "2-ea.html#SP4" class = "function-link" > < span class = "function-syntax" > EmitArrays::iname_entry< / span > < / a > < span class = "plain-syntax" > (< / span > < a href = "2-hrr.html#SP11" class = "function-link" > < span class = "function-syntax" > Hierarchy::find< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > DOUBLEHASHSETRELATIONHANDLER_HL< / span > < span class = "plain-syntax" > ));< / span >
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< span class = "plain-syntax" > < / span > < a href = "2-ea.html#SP4" class = "function-link" > < span class = "function-syntax" > EmitArrays::text_entry< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > I< / span > < span class = "string-syntax" > "an anonymous relation"< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < a href = "2-ea.html#SP4" class = "function-link" > < span class = "function-syntax" > EmitArrays::numeric_entry< / span > < / a > < span class = "plain-syntax" > (0);< / span >
< span class = "plain-syntax" > < / span > < a href = "2-ea.html#SP4" class = "function-link" > < span class = "function-syntax" > EmitArrays::numeric_entry< / span > < / a > < span class = "plain-syntax" > (0);< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > for< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > =0; < / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > < 24; < / span > < span class = "identifier-syntax" > i< / span > < span class = "plain-syntax" > ++) < / span > < a href = "2-ea.html#SP4" class = "function-link" > < span class = "function-syntax" > EmitArrays::numeric_entry< / span > < / a > < span class = "plain-syntax" > (0);< / span >
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< span class = "plain-syntax" > < / span > < a href = "2-ea.html#SP5" class = "function-link" > < span class = "function-syntax" > EmitArrays::end< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > save< / 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" > small_block< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
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