COMPILER DESIGN

Detailed explanation-1: -A top-down parser that implements a set of recursive procedures to process the input without backtracking is known as recursive-descent parser, and parsing is known as recursive-descent parsing.

Detailed explanation-2: -Recursive Descent Parser uses the technique of Top-Down Parsing without backtracking. It can be defined as a Parser that uses the various recursive procedure to process the input string with no backtracking. It can be simply performed using a Recursive language.

Detailed explanation-3: -Recursive-descent parsers are also called top-down parsers, since they construct the parse tree top down (rather than bottom up). The basic idea of recursive-descent parsing is to associate each non-terminal with a procedure.

Detailed explanation-4: -Backtracking is still useful, but if you need backtracking you can use a dedicated parser for it: OneOf . It’s a parser that tries multiple parsers on the same input. If one fails, it backtracks the input to its original state, and if one succeeds, then that output is returned and no other parsers are tried.