An base class designed for parsers that use LLLPG (Loyc LL(k) Parser Generator) and receive tokens from any IEnumerator<Token>. More...

Source file:

/Core/Loyc.Syntax/Parsing/BaseParserNoBacktracking.cs

Remarks

An base class designed for parsers that use LLLPG (Loyc LL(k) Parser Generator) and receive tokens from any IEnumerator<Token>.

This base class for LLLPG parsers simply requires an enumerator to work, and it has a small buffer to hold lookahead tokens. Old tokens are forgotten, so this base class does not support backtracking (i.e. syntactic predicates), but it can save memory. Please use BaseParserForList<Tok,La> if your input sequence comes in the form of a list.

This version of BaseParser has Enumerator as a generic parameter. Compared to using IEnumerator{Token} directly, this can increase performance in case Enumerator is a value type (e.g. List<Token>.Enumerator).

(I wrote this class by mistake... I actually forgot about backtracking!)

Type Constraints

Token	:	ISimpleToken
Enumerator	:	IEnumerator<Token>