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Write syntax directed definitions (semantic rules) for the following grammar to add the type of each identifier to its entry in the symbol table during semantic analysis. Rewriting the grammar is not permitted and semantic rules are to be added to the ends of productions only.

  • $D \rightarrow TL;$
  • $T \rightarrow \text{int}$
  • $T \rightarrow \text{real}$
  • $L \rightarrow L,id$
  • $L \rightarrow id$
asked in Compiler Design by Veteran (59.5k points)
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PRODUCTION RULE SEMANTIC ACTIONS
$D \rightarrow TL$  $L.in:=T.type$
$T  \rightarrow int$  $T.type:=integer$
$T \rightarrow  real$    $T.type:=real$
$L \rightarrow L,id$   $L1.in=L.in$
Enter_type$(id.entry, L.in)$
$L  \rightarrow  id$   Enter_type$(id.entry, L.in)$
answered by (423 points)
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What is L.in?

Why two times Enter_Type(id.entry, L.in)?

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