Finalize the lexer rule set

# Parle\Lexer::build

(PECL parle >= 0.5.1)

Parle\Lexer::build — Finalize the lexer rule set

### 说明

public function Parle\Lexer::build(): void

Rules, previously added with Parle\Lexer::push() are finalized. This method call has to be done after all the necessary rules was pushed. The rule set becomes read only. The lexing can begin.

### 参数

此函数没有参数。

### 返回值

没有返回值。

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