Table of Contents
- 1 How do you implement recursive descent parsing?
- 2 Which parser is an efficient way of implementing recursive descent parsing by handling the stack of activation records explicitly?
- 3 Does recursive descent parser uses backtracking?
- 4 How is recursive descent parser different from recursive parser?
- 5 Is an efficient way of implementing recursive parser by handing the stack?
- 6 How does a predictive parser implement recursive parsing?
How do you implement recursive descent parsing?
Basically in recursive descent parsing each non-terminal in the grammar is translated into a procedure, then inside each procedure you check to see if the current token you are looking at matches what you would expect to see on the right hand side of the non-terminal symbol corresponding to the procedure, if it does …
Which parser is an efficient way of implementing recursive descent parsing by handling the stack of activation records explicitly?
NON-RECURSIVE PREDICTIVE PARSING • A non-recursive predictive parser is an efficient way of implementing by handling the stack of activation records explicitly.
How many times the recursive descent parser will backtrack?
Discussion Forum
| Que. | Consider the following grammar: A → cAd A → ab/ac/a For Input string cad, how many times the recursive descent parser will backtrack? |
|---|---|
| b. | 3 |
| c. | 4 |
| d. | 5 |
| Answer:2 |
Does recursive descent parser uses backtracking?
Recursive descent with backtracking is a technique that determines which production to use by trying each production in turn. Recursive descent with backtracking is not limited to LL(k) grammars, but is not guaranteed to terminate unless the grammar is LL(k).
How is recursive descent parser different from recursive parser?
Recursive Descent Parser is a top-down method of syntax analysis in which a set of recursive procedures is used to process input….
| Recursive Predictive Descent Parser | Non-Recursive Predictive Descent Parser |
|---|---|
| It accepts all kinds of grammars. | It accepts only a class of grammar known as LL(k) grammar. |
Does the grammar allow the use of recursive descent parsing?
A grammar rule is said to be directly left recursive if the first symbol on the RHS is identical to the LHS nonterminal. Hence a recursive descent parser cannot be written for a grammar which contains such directly (or indirectly) left recursive rules; in fact, the grammar cannot be LL(1) in the presence of such rules.
Is an efficient way of implementing recursive parser by handing the stack?
A predictive parser is an efficient way of implementing recursive-descent parsing by handling the stack of activation records explicitly. The predictive parser has an input, a stack, a parsing table, and an output. The input contains the string to be parsed, followed by $, the right endmarker.
How does a predictive parser implement recursive parsing?
A Predictive Parser is a special case of Recursive Descent Parser, where no Back Tracking is required. By carefully writing a grammar means eliminating left recursion and left factoring from it, the resulting grammar will be a grammar that can be parsed by a recursive descent parser. Example: Attention reader!
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