What is Syntax-Directed Translation (SDT) in compiler design?
Syntax-Directed Translation (SDT) augments Context-Free Grammar productions with semantic rules or actions to compute attributes or generate intermediate code during parsing.
[BPSC TRE 3.0 Class 11-12 PYQ] In Syntax-Directed Definition (SDD), an attribute is synthesized if its value at a parse tree node is determined by:
A synthesized attribute at a node is computed strictly from the attribute values of the node's children (and possibly other attributes of that node itself).
An attribute of a parse tree node is called an Inherited Attribute if its value is defined in terms of:
An inherited attribute at a parse tree node is defined using the attribute values of its parent node and/or sibling nodes.
Which of the following is true regarding an S-Attributed Definition?
S-attributed definitions use ONLY synthesized attributes and can be easily evaluated during bottom-up (LR) parsing by placing semantic actions at the end of productions.
An L-Attributed Definition allows inherited attributes to depend on:
L-attributed definitions restrict inherited attribute dependencies to the parent node and symbols lying to the LEFT of the node in the grammar production, allowing top-down or depth-first evaluation.