function expectString($str)
{
$result = $this->lexer->expectString($this->s, $this->offset, $str);
if (!$result) {
throw new LexException($this->s[$this->offset], $this->line, $this->char_offset);
}
$tok = [$str, $str];
$this->processToken($tok);
return $this->cur;
}
function testExpectString()
{
$m = ['+', '-', 'd' => '\\d+'];
$lexer = new Lexer($m);
$this->assertFalse($lexer->expectString('123', 0, 'd'));
$this->assertTrue($lexer->expectString('123', 0, '123'));
$this->assertTrue($lexer->expectString('12+34', 2, '+'));
$this->assertTrue($lexer->expectString('12+34', 3, '34'));
$stream = $lexer->getTokenStream('1+2');
$stream->next();
$tok = $stream->expectString('+');
$this->assertEquals('+', $tok[0]);
$this->assertEquals('+', $tok[1]);
$this->assertEquals(1, $tok[2]);
$this->assertEquals(1, $tok[3]);
$tok = $stream->expectString('2');
$this->assertEquals('2', $tok[0]);
$this->assertEquals('2', $tok[1]);
$this->assertNotEmpty($tok);
$stream = $lexer->getTokenStream('1+2');
$tok = $stream->expectString('1');
$this->assertEquals('1', $tok[0]);
$this->assertEquals('1', $tok[1]);
$this->assertNotEmpty($tok);
}
