function testPrefer()
{
$m = ['test', 'name' => '[a-z]\\w+', 'd' => '\\d+', '0'];
$lexer = new Lexer();
$lexer->init($m);
$m = $lexer->match('test', 0);
$this->assertEquals('test', $m[0]);
$this->assertEquals('test', $m[1]);
$m = $lexer->match('test', 0, 'name');
$this->assertEquals('name', $m[0]);
$this->assertEquals('test', $m[1]);
$m = $lexer->match('test', 0, ['name']);
$this->assertEquals('name', $m[0]);
$this->assertEquals('test', $m[1]);
$m = $lexer->match('test', 0, ['test']);
$this->assertEquals('test', $m[0]);
$this->assertEquals('test', $m[1]);
$m = $lexer->match('test', 0, ['test', 'name']);
$this->assertEquals('test', $m[0]);
$this->assertEquals('test', $m[1]);
$m = $lexer->match('0', 0, ['name']);
$this->assertEquals('0', $m[0]);
$this->assertEquals('0', $m[1]);
}
function next($prefer = null)
{
if ($this->end) {
return null;
}
if (!empty($this->back)) {
$token = array_pop($this->back);
$this->cur = $token;
if ($token === null) {
$this->end = true;
}
return $this->cur;
}
$token = $this->lexer->match($this->s, $this->offset, $prefer);
if ($token === null) {
if ($this->offset != strlen($this->s)) {
throw new LexException($this->s[$this->offset], $this->line, $this->char_offset);
}
$this->end = true;
$this->cur = null;
return null;
}
$this->processToken($token);
return $this->cur;
}
