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research:jtransformer:api:java:pefs:2.9:assignopt [2018/05/09 01:59] (current)
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 +{{page>​prologast_bodypef_index&​fullpage&​nofooter}}
 +
 +----
 +
 +=== assignopT(#​id,​ #parent, #encl, #lhs, '​operator',​ #​expr) ​ ===
 +
 +Represents assignment expressions with shorthand arithmetic operations ('​+=','​-=',​ ...)
 +
 +=== Attributes ===
 +== ==
 +**#id:** id\\ 
 +the unique ID assigned to this fact.
 +
 +**#​parent:​** id\\ 
 +ID of the parent node.
 +
 +**#encl:** [[methodt|methodT]],​ [[constructorT|constructorT]],​ [[classInitializerT |classInitializerT]],​ [[fieldt|fieldT]]\\
 +ID of the fact that represents the enclosing element.
 +
 +**#lhs:** [[getfieldt|getFieldT]],​ [[identt|identT]],​ [[indexedt|indexedT]]\\ ​
 +ID of the left hand side of this assignment expression.
 +
 +**'​operator':​** atom\\ ​
 +assignment operator.
 +
 +**#expr:** [[plastexpression|expression]]\\ ​
 +ID of the right hand side expression.
 +
 +=== Sample Java Source ===
 +==  ==
 +<Code lang-java>​
 +void assignOperation(){
 + int i = 5;
 + i += i;                //​corresponding line to assignopT
 + System.out.println(i);​
 +}
 +</​Code>​
 +
 +
 +=== Its PEF Representation ===
 +
 +==  ==
 +<Code lang-prolog>​
 +assignopT(#​id,​ #parent, #encl, #lhs, '​+',​ #expr),
 +execT(#​parent,​ ..., #encl, #id),
 +methodT(#​encl,​ ..., '​assignOperation',​ [], type(basic, void, 0), [], ...),
 +identT(#​lhs,​ #id, #encl, '​i',​ ...),
 +identT(#​expr,​ #id, #encl, '​i',​ ...),
 +
 +</​Code>​
 +===AST Specification===
 +== ==
 +<​Code>​
 +ast_node_def('​Java',​assignopT,​[
 +     ​ast_arg(id, ​     mult(1,1,no ), id,  [assignopT]),​ % <-- convention!!!
 +     ​ast_arg(parent, ​ mult(1,1,no ), id,  [id]), % <-- convention!!!
 +     ​ast_arg(encl, ​   mult(1,1,no ), id,  [methodT, constructorT,​ classInitializerT,​ fieldT]),
 +     ​ast_arg(lhs, ​    ​mult(1,​1,​no ), id,  [getFieldT, identT, indexedT]),
 +     ​ast_arg(operator,​mult(1,​1,​no ), attr,​[atom]),​
 +     ​ast_arg(expr, ​   mult(1,1,no ), id,  [expressionType])
 +]).
 +</​Code>​
 +
  
research/jtransformer/api/java/pefs/2.9/assignopt.txt · Last modified: 2018/05/09 01:59 (external edit)

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