earry-lookahead

基本解釋

Positive lookahead and lookbehind do not backtrack.
積極的預(yù)測先行和追溯不廻溯。
The biggest limitation is that yacc is limited to one token of lookahead.
最大的侷限在於,yacc被限定爲(wèi)一個預(yù)讀標(biāo)記。
This “l(fā)ookahead” into cool/hot spot movement is supplied to you each turn.
這些對於冷/熱場的的移動信息在每次移動之前會提供給你。
Provides information about regular expression lookahead and lookbehind behavior.
提供關(guān)於正則表達(dá)式預(yù)測先行和追溯行爲(wèi)的信息。
Assertions do not change: lookahead looks to the right; lookbehind looks to the left.
斷言不改變:預(yù)測先行曏右搜索;廻顧後發(fā)曏左搜索。