Syntax Directed Translation
Syntax Directed Translation
Syntax Directed Translation
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Summary<br />
• syntax-directed translations -<br />
grammar + semantic rules<br />
– synthesised attributes<br />
– inherited attributes<br />
– b := f(c 1 , c 2 , c 3 , …, c k )<br />
• S-attributed definition<br />
– only synthesised attributes<br />
• dependency graphs<br />
• constructing syntax trees<br />
– syntax-directed definition<br />
• DAGs for expressions<br />
• bottom up evaluation of S-<br />
attributed definitions<br />
• L-attributed definitions<br />
– inherited attributes depend<br />
on A and left siblings A => α<br />
• translation schemes<br />
– CFG + attributes + semantic<br />
actions in { } in RHS of P<br />
• top down translation<br />
– left recursive grammar<br />
– right recursive grammar<br />
– X.i & X.s attributes<br />
22<br />
14/10/2014 DFR - CC - SDT
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