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< ul class = "crumbs" > < li > < a href = "../index.html" > Home< / a > < / li > < li > < a href = "../compiler.html" > Inform7< / a > < / li > < li > < a href = "index.html" > if< / a > < / li > < li > < a href = "index.html#4" > Chapter 4: Actions< / a > < / li > < li > < b > Action Kinds< / b > < / li > < / ul > < / div >
< p class = "purpose" > Three action-related kinds of value.< / p >
< p class = "commentary firstcommentary" > < a id = "SP1" class = "paragraph-anchor" > < / a > < b > § 1. < / b > The following represent action names, stored actions and descriptions of
actions respectively: see < a href = "4-ap.html" class = "internal" > Actions Plugin< / a > for what these terms mean.
< / p >
< pre class = "displayed-code all-displayed-code code-font" >
< span class = "identifier-syntax" > kind< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > K_action_name< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ;< / span >
< span class = "identifier-syntax" > kind< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > K_stored_action< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ;< / span >
< span class = "identifier-syntax" > kind< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > K_description_of_action< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > NULL< / span > < span class = "plain-syntax" > ;< / span >
< / pre >
< p class = "commentary firstcommentary" > < a id = "SP2" class = "paragraph-anchor" > < / a > < b > § 2. < / b > These are created by a Neptune file inside < a href = "../WorldModelKit/index.html" class = "internal" > WorldModelKit< / a > , and are
recognised by their Inter identifiers:
< / p >
< pre class = "displayed-code all-displayed-code code-font" >
< span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > ARvalues::new_base_kind_notify< / 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" > ARvalues::new_base_kind_notify< / span > < / span > :< br / > Actions Plugin - < a href = "4-ap.html#SP1" > § 1< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > kind< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > new_base< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > text_stream< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > name< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > wording< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > W< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Str::eq_wide_string< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > name< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > L< / span > < span class = "string-syntax" > "ACTION_NAME_TY"< / span > < span class = "plain-syntax" > )) {< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > K_action_name< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > new_base< / 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 = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Str::eq_wide_string< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > name< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > L< / span > < span class = "string-syntax" > "DESCRIPTION_OF_ACTION_TY"< / span > < span class = "plain-syntax" > )) {< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > K_description_of_action< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > new_base< / 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 = "plain-syntax" > < / span > < span class = "reserved-syntax" > if< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > Str::eq_wide_string< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > name< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > L< / span > < span class = "string-syntax" > "STORED_ACTION_TY"< / span > < span class = "plain-syntax" > )) {< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > K_stored_action< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > new_base< / 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 = "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 >
< / pre >
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< p class = "commentary firstcommentary" > < a id = "SP3" class = "paragraph-anchor" > < / a > < b > § 3. < / b > A stored action can always be compared to a gerund: for instance,
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< / p >
< blockquote >
< p > if the current action is taking something...< / p >
< / blockquote >
< pre class = "displayed-code all-displayed-code code-font" >
< span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "function-syntax" > ARvalues::actions_typecheck_equality< / 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" > ARvalues::actions_typecheck_equality< / span > < / span > :< br / > Actions Plugin - < a href = "4-ap.html#SP1" > § 1< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > kind< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > K1< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > kind< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > K2< / 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::eq< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > K1< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K_stored_action< / span > < span class = "plain-syntax" > )) & & (< / span > < span class = "identifier-syntax" > Kinds::eq< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > K2< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K_description_of_action< / 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 > < 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 >
< / pre >
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< p class = "commentary firstcommentary" > < a id = "SP4" class = "paragraph-anchor" > < / a > < b > § 4. < / b > All three of these kinds can have constant values. For an action name, these
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correspond simply to < a href = "4-act.html#SP1" class = "internal" > action_name< / a > objects:
< / p >
< pre class = "displayed-code all-displayed-code code-font" >
< span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > ARvalues::from_action_name< / 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" > ARvalues::from_action_name< / span > < / span > :< br / > Action Name Names - < a href = "4-ann.html#SP3" > § 3< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > action_name< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > val< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > CONV_FROM< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > action_name< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K_action_name< / span > < span class = "plain-syntax" > ) }< / span >
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< span class = "reserved-syntax" > action_name< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > ARvalues::to_action_name< / 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" > ARvalues::to_action_name< / span > < / span > :< br / > < a href = "4-ak.html#SP7" > § 7< / a > < br / > Actions Plugin - < a href = "4-ap.html#SP5" > § 5< / a > < br / > Action Variables - < a href = "4-av.html#SP1" > § 1< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > CONV_TO< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > action_name< / span > < span class = "plain-syntax" > ) }< / span >
< / pre >
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< p class = "commentary firstcommentary" > < a id = "SP5" class = "paragraph-anchor" > < / a > < b > § 5. < / b > When text is parsed to an action pattern, the result can be stored as a
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constant in two ways. If the pattern unambiguously describes a single explicit
action, the result has the kind "stored action" and corresponds to an
< a href = "4-ea.html#SP1" class = "internal" > explicit_action< / a > object; if the pattern is looser than that, the result
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is a "description of action" and correspond to an < a href = "4-ap2.html#SP3" class = "internal" > action_pattern< / a > .
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< / p >
< p class = "commentary" > For example, "taking the golden telephone" might be a < span class = "extract" > < span class = "extract-syntax" > K_stored_action< / span > < / span >
constant, but "doing something to the golden telephone" or "taking something"
or "taking the golden telephone in the presence of Mr Wu" would all be
< span class = "extract" > < span class = "extract-syntax" > K_description_of_action< / span > < / span > .
< / p >
< pre class = "displayed-code all-displayed-code code-font" >
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< span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > ARvalues::from_action_pattern< / 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" > ARvalues::from_action_pattern< / span > < / span > :< br / > Actions-Only Nodes and Annotations - < a href = "4-anaa.html#SP8" > § 8< / a > < br / > Action Conditions - < a href = "4-ac.html#SP1" > § 1< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > action_pattern< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > val< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > failure_code< / span > < span class = "plain-syntax" > = < / span > < span class = "constant-syntax" > 0< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > < / span > < span class = "reserved-syntax" > explicit_action< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > ea< / span > < span class = "plain-syntax" > = < / span > < a href = "4-ea.html#SP2" class = "function-link" > < span class = "function-syntax" > ExplicitActions::from_action_pattern< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > val< / span > < span class = "plain-syntax" > , & < / span > < span class = "identifier-syntax" > failure_code< / 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" > ea< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > Node::new< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > CONSTANT_NT< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Node::set_kind_of_value< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K_stored_action< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > Node::set_constant_explicit_action< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > ea< / 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" > spec< / 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 > < span class = "identifier-syntax" > CONV_FROM< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > action_pattern< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K_description_of_action< / span > < span class = "plain-syntax" > );< / span >
< span class = "plain-syntax" > }< / span >
< span class = "plain-syntax" > }< / span >
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< span class = "reserved-syntax" > action_pattern< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > ARvalues::to_action_pattern< / 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" > ARvalues::to_action_pattern< / span > < / span > :< br / > Action Conditions - < a href = "4-ac.html#SP1" > § 1< / a > , < a href = "4-ac.html#SP2" > § 2< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > CONV_TO< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > action_pattern< / span > < span class = "plain-syntax" > ) }< / span >
< span class = "reserved-syntax" > explicit_action< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > ARvalues::to_explicit_action< / 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" > ARvalues::to_explicit_action< / span > < / span > :< br / > Action Conditions - < a href = "4-ac.html#SP1" > § 1< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > CONV_TO< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > explicit_action< / span > < span class = "plain-syntax" > ) }< / span >
< / pre >
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< p class = "commentary firstcommentary" > < a id = "SP6" class = "paragraph-anchor" > < / a > < b > § 6. < / b > Finally, for a named action pattern, constant values correspond to
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< a href = "4-nap.html#SP1" class = "internal" > named_action_pattern< / a > objects. These are actually never used at run-time
and do not appear as rvalues in any permanent way inside the compiler, so
the kind < span class = "extract" > < span class = "extract-syntax" > K_description_of_action< / span > < / span > is given to them only on principle. If
they were used as values, this is the kind we would probably give them.
< / p >
< pre class = "displayed-code all-displayed-code code-font" >
< span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > ARvalues::from_named_action_pattern< / 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" > ARvalues::from_named_action_pattern< / span > < / span > :< br / > Named Action Patterns - < a href = "4-nap.html#SP3" > § 3< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > named_action_pattern< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > val< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > CONV_FROM< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > named_action_pattern< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K_description_of_action< / span > < span class = "plain-syntax" > ) }< / span >
< span class = "reserved-syntax" > named_action_pattern< / span > < span class = "plain-syntax" > *< / span > < span class = "function-syntax" > ARvalues::to_named_action_pattern< / 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" > ARvalues::to_named_action_pattern< / span > < / span > :< br / > Named Action Patterns - < a href = "4-nap.html#SP3" > § 3< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > spec< / span > < span class = "plain-syntax" > ) {< / span >
< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > CONV_TO< / span > < span class = "plain-syntax" > (< / span > < span class = "reserved-syntax" > named_action_pattern< / span > < span class = "plain-syntax" > ) }< / span >
< / pre >
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< p class = "commentary firstcommentary" > < a id = "SP7" class = "paragraph-anchor" > < / a > < b > § 7. < / b > It's not useful to be able to compare description of action constants for
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equality in this sense. There would be a case for doing so with stored actions,
but in practice there seems little need, so for the moment we do not.
< / 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" > ARvalues::compare_CONSTANT< / 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" > ARvalues::compare_CONSTANT< / span > < / span > :< br / > Actions Plugin - < a href = "4-ap.html#SP1" > § 1< / a > < / span > < / button > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > spec1< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > parse_node< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > spec2< / span > < span class = "plain-syntax" > , < / span > < span class = "reserved-syntax" > int< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > rv< / span > < span class = "plain-syntax" > ) {< / span >
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< span class = "plain-syntax" > < / span > < span class = "identifier-syntax" > kind< / span > < span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > Node::get_kind_of_value< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec1< / 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::eq< / span > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > K< / span > < span class = "plain-syntax" > , < / span > < span class = "identifier-syntax" > K_action_name< / 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 > < a href = "4-ak.html#SP4" class = "function-link" > < span class = "function-syntax" > ARvalues::to_action_name< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec1< / span > < span class = "plain-syntax" > ) == < / span > < a href = "4-ak.html#SP4" class = "function-link" > < span class = "function-syntax" > ARvalues::to_action_name< / span > < / a > < span class = "plain-syntax" > (< / span > < span class = "identifier-syntax" > spec2< / span > < span class = "plain-syntax" > )) {< / span >
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< span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > rv< / span > < span class = "plain-syntax" > = < / span > < span class = "identifier-syntax" > TRUE< / span > < span class = "plain-syntax" > ;< / span >
< span class = "plain-syntax" > }< / span >
< span class = "plain-syntax" > *< / span > < span class = "identifier-syntax" > rv< / 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" > 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 = "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 >
< / pre >
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