Syntax directed translation scheme
- The Syntax directed translation scheme is a context -free grammar.
- The syntax directed translation scheme is used to evaluate the order of semantic rules.
- In translation scheme, the semantic rules are embedded within the right side of the productions.
- The position at which an action is to be executed is shown by enclosed between braces. It is written within the right side of the production.
Example
| Production |
Semantic Rules |
| S → E $ |
{ printE.VAL } |
| E → E + E |
{E.VAL := E.VAL + E.VAL } |
| E → E * E |
{E.VAL := E.VAL * E.VAL } |
| E → (E) |
{E.VAL := E.VAL } |
| E → I |
{E.VAL := I.VAL } |
| I → I digit |
{I.VAL := 10 * I.VAL + LEXVAL } |
| I → digit |
{ I.VAL:= LEXVAL} |
|
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