leftmost derivation造句
例句與造句
- We say that G is LL ( k ), if and only if for any two leftmost derivations:
- For example, if the string " 1 + 1 + a " is derived according to the leftmost derivation:
- LL parsers will generate a leftmost derivation and LR parsers will generate a rightmost derivation ( although usually in reverse ).
- An important distinction with regard to parsers is whether a parser generates a " leftmost derivation " or a " rightmost derivation " ( see context-free grammar ).
- The distinction between leftmost derivation and rightmost derivation is important because in most parsers the transformation of the input is defined by giving a piece of code for every grammar rule that is executed whenever the rule is applied.
- It's difficult to find leftmost derivation in a sentence. 用leftmost derivation造句挺難的