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<?php
namespace App;
class Interpreter
{
/**
* @var Parser
*/
private $parser;
* @var Visitor
private $visitor;
* Interpreter constructor.
* @param Parser $parser
* @param Visitor $visitor
public function __construct(
Parser $parser,
Visitor $visitor
)
$this->parser = $parser;
$this->visitor = $visitor;
}
* @param string $input
* @return bool|float|int|string|null
* @throws Exception\LexerException
* @throws Exception\UnknownIdentifier
public static function evaluate(string $input)
$lexer = new Lexer($input);
$parser = new Parser($lexer);
$visitor = new Visitor();
$interpreter = new static($parser, $visitor);
return $interpreter->interpr();
* @throws Exception\ParseError
public function interpr()
$ast = $this->parser->parse();
return $this->visitor->visit($ast);
drumser /
arithmetic-parser
