Retrieve a rule or token name

# Parle\Parser::sigilName

(PECL parle >= 0.8.4)

Parle\Parser::sigilName — Retrieve a rule or token name

### 说明

public function Parle\Parser::sigilName(int `$idx`): string

Retrieve a partial rule name or token name corresponding to the sigil index.

### 参数

`idx`

  Match index, zero based.

### 返回值

Returns a string with the matched part.

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