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<?php
namespace CondParse;
use CondParse\Exception\ParserException;
class Parser implements ParserInterface
{
/** @var TokenParser */
private $tokenParser;
public function __construct(TokenParser $tokenParser = null)
$this->tokenParser = $tokenParser ?: new TokenParser;
}
/**
* @param \Traversable $tokenStream
* @param TokenMap $tokenMap
* @return OperandInterface
* @throws ParserException
*/
public function parseTokenStream(\Traversable $tokenStream, TokenMap $tokenMap)
$operandStack = new OperandStack();
$operatorStack = new \SplStack();
foreach ($tokenStream as $lexerToken) {
$this->tokenParser->parseToken(
new TokenParserParameter($lexerToken, $operandStack, $operatorStack, $tokenMap)
);
while (! $operatorStack->isEmpty()) {
$operandStack->push(
$tokenMap
->buildOperand($operatorStack->pop())
->consumeTokens($operandStack)
return $operandStack->isEmpty()
? null
: $operandStack->top();
zwilias /
condparse
