Assign a value to a variable
/**
* Compiles a type cast operation
*
* @param $expression
* @param CompilationContext $compilationContext
* @return bool|CompiledExpression
* @throws CompilerException
*/
public function compile($expression, CompilationContext $compilationContext)
{
$expr = new Expression($expression['right']);
$resolved = $expr->compile($compilationContext);
switch ($expression['left']) {
case 'int':
switch ($resolved->getType()) {
case 'null':
return new CompiledExpression('int', 0, $expression);
case 'int':
return new CompiledExpression('int', $resolved->getCode(), $expression);
case 'double':
return new CompiledExpression('int', '(int) ' . $resolved->getCode(), $expression);
case 'bool':
return new CompiledExpression('int', $resolved->getBooleanCode(), $expression);
case 'string':
$compilationContext->headersManager->add('kernel/operators');
/**
* zephir_get_intval_ex use zval variable
* before use with it we create a new variable and assign value of literal
*
* @todo Optimize by creating native function for string without zval using
*/
$symbolVariable = $compilationContext->symbolTable->getTempVariableForWrite('string', $compilationContext);
$let = new LetVariable();
$original = $resolved->getOriginal();
$original['operator'] = 'assign';
$let->assign($symbolVariable->getName(), $symbolVariable, $resolved, new ReadDetector(), $compilationContext, $original);
$symbol = $compilationContext->backend->getVariableCode($symbolVariable);
return new CompiledExpression('int', 'zephir_get_intval_ex(' . $symbol . ')', $expression);
case 'array':
$compilationContext->headersManager->add('kernel/operators');
$symbolVariable = $compilationContext->symbolTable->getVariableForRead($resolved->getCode(), $compilationContext, $expression);
$symbol = $compilationContext->backend->getVariableCode($symbolVariable);
return new CompiledExpression('int', 'zephir_get_intval(' . $symbol . ')', $expression);
case 'variable':
$compilationContext->headersManager->add('kernel/operators');
$symbolVariable = $compilationContext->symbolTable->getVariableForRead($resolved->getCode(), $compilationContext, $expression);
switch ($symbolVariable->getType()) {
case 'int':
return new CompiledExpression('int', $symbolVariable->getName(), $expression);
case 'double':
return new CompiledExpression('int', '(int) (' . $symbolVariable->getName() . ')', $expression);
case 'bool':
return new CompiledExpression('int', '(int) (' . $symbolVariable->getName() . ')', $expression);
case 'array':
case 'variable':
case 'string':
$symbol = $compilationContext->backend->getVariableCode($symbolVariable);
return new CompiledExpression('int', 'zephir_get_intval(' . $symbol . ')', $expression);
default:
throw new CompilerException("Cannot cast: " . $resolved->getType() . "(" . $symbolVariable->getType() . ") to " . $expression['left'], $expression);
}
break;
default:
throw new CompilerException("Cannot cast: " . $resolved->getType() . " to " . $expression['left'], $expression);
}
break;
case 'long':
switch ($resolved->getType()) {
case 'int':
return new CompiledExpression('long', $resolved->getCode(), $expression);
case 'double':
return new CompiledExpression('long', '(long) ' . $resolved->getCode(), $expression);
case 'bool':
return new CompiledExpression('long', $resolved->getBooleanCode(), $expression);
case 'array':
$compilationContext->headersManager->add('kernel/operators');
$symbolVariable = $compilationContext->symbolTable->getVariableForRead($resolved->getCode(), $compilationContext, $expression);
return new CompiledExpression('long', 'zephir_get_intval(' . $symbolVariable->getName() . ')', $expression);
case 'variable':
$compilationContext->headersManager->add('kernel/operators');
$symbolVariable = $compilationContext->symbolTable->getVariableForRead($resolved->getCode(), $compilationContext, $expression);
switch ($symbolVariable->getType()) {
case 'int':
return new CompiledExpression('long', $symbolVariable->getName(), $expression);
case 'double':
return new CompiledExpression('long', '(long) (' . $symbolVariable->getName() . ')', $expression);
case 'variable':
$symbol = $compilationContext->backend->getVariableCode($symbolVariable);
return new CompiledExpression('long', 'zephir_get_intval(' . $symbol . ')', $expression);
default:
throw new CompilerException("Cannot cast: " . $resolved->getType() . "(" . $symbolVariable->getType() . ") to " . $expression['left'], $expression);
}
break;
default:
throw new CompilerException("Cannot cast: " . $resolved->getType() . " to " . $expression['left'], $expression);
}
break;
case 'double':
switch ($resolved->getType()) {
case 'null':
return new CompiledExpression('double', 0, $expression);
case 'bool':
return new CompiledExpression('double', $resolved->getBooleanCode(), $expression);
case 'double':
return new CompiledExpression('double', $resolved->getCode(), $expression);
case 'array':
$compilationContext->headersManager->add('kernel/operators');
$symbolVariable = $compilationContext->symbolTable->getVariableForRead($resolved->getCode(), $compilationContext, $expression);
$symbol = $compilationContext->backend->getVariableCode($symbolVariable);
return new CompiledExpression('double', 'zephir_get_doubleval(' . $symbol . ')', $expression);
case 'variable':
$compilationContext->headersManager->add('kernel/operators');
$symbolVariable = $compilationContext->symbolTable->getVariableForRead($resolved->getCode(), $compilationContext, $expression);
switch ($symbolVariable->getType()) {
case 'int':
return new CompiledExpression('double', $symbolVariable->getName(), $expression);
case 'double':
return new CompiledExpression('double', '(double) (' . $symbolVariable->getName() . ')', $expression);
case 'bool':
return new CompiledExpression('double', '(double) (' . $symbolVariable->getName() . ')', $expression);
case 'array':
case 'variable':
$symbol = $compilationContext->backend->getVariableCode($symbolVariable);
return new CompiledExpression('double', 'zephir_get_doubleval(' . $symbol . ')', $expression);
default:
throw new CompilerException("Cannot cast: " . $resolved->getType() . "(" . $symbolVariable->getType() . ") to " . $expression['left'], $expression);
}
break;
default:
throw new CompilerException("Cannot cast: " . $resolved->getType() . " to " . $expression['left'], $expression);
}
break;
case 'bool':
switch ($resolved->getType()) {
case 'int':
return new CompiledExpression('bool', '(zend_bool) ' . $resolved->getCode(), $expression);
case 'bool':
return new CompiledExpression('bool', $resolved->getCode(), $expression);
case 'variable':
$compilationContext->headersManager->add('kernel/operators');
$symbolVariable = $compilationContext->symbolTable->getVariableForRead($resolved->getCode(), $compilationContext, $expression);
$symbol = $compilationContext->backend->getVariableCode($symbolVariable);
if ($symbolVariable->isTemporal()) {
$symbolVariable->setIdle(true);
}
switch ($symbolVariable->getType()) {
case 'variable':
return new CompiledExpression('bool', 'zephir_get_boolval(' . $symbol . ')', $expression);
default:
throw new CompilerException("Cannot cast: " . $resolved->getType() . "(" . $symbolVariable->getType() . ") to " . $expression['left'], $expression);
}
break;
default:
throw new CompilerException("Cannot cast: " . $resolved->getType() . " to " . $expression['left'], $expression);
}
break;
case 'char':
switch ($resolved->getType()) {
case 'variable':
$compilationContext->headersManager->add('kernel/operators');
$tempVariable = $compilationContext->symbolTable->getTempVariableForWrite('char', $compilationContext);
$symbolVariable = $compilationContext->symbolTable->getVariableForRead($resolved->getCode(), $compilationContext, $expression);
$variableCode = $compilationContext->backend->getVariableCode($symbolVariable);
$compilationContext->codePrinter->output($tempVariable->getName() . ' = (char) zephir_get_intval(' . $variableCode . ');');
return new CompiledExpression('variable', $tempVariable->getName(), $expression);
default:
throw new CompilerException("Cannot cast: " . $resolved->getType() . " to " . $expression['left'], $expression);
}
break;
case 'string':
switch ($resolved->getType()) {
case 'variable':
$compilationContext->headersManager->add('kernel/operators');
$compilationContext->symbolTable->mustGrownStack(true);
$symbolVariable = $compilationContext->symbolTable->getTempVariable('string', $compilationContext);
$symbolVariable->setMustInitNull(true);
$symbolVariable->setIsInitialized(true, $compilationContext);
$symbolVariable->increaseUses();
$symbol = $compilationContext->backend->getVariableCode($symbolVariable);
$resolvedVariable = $compilationContext->symbolTable->getVariableForRead($resolved->getCode(), $compilationContext);
$resolvedCode = $compilationContext->backend->getVariableCode($resolvedVariable);
$compilationContext->codePrinter->output('zephir_get_strval(' . $symbol . ', ' . $resolvedCode . ');');
if ($symbolVariable->isTemporal()) {
$symbolVariable->setIdle(true);
}
return new CompiledExpression('variable', $symbolVariable->getName(), $expression);
default:
throw new CompilerException("Cannot cast: " . $resolved->getType() . " to " . $expression['left'], $expression);
}
break;
case 'array':
switch ($resolved->getType()) {
case 'variable':
$compilationContext->headersManager->add('kernel/operators');
$compilationContext->symbolTable->mustGrownStack(true);
$symbolVariable = $compilationContext->symbolTable->getTempVariable('array', $compilationContext, $expression);
$symbolVariable->setMustInitNull(true);
$symbolVariable->setIsInitialized(true, $compilationContext, $expression);
$symbolVariable->increaseUses();
$symbol = $compilationContext->backend->getVariableCode($symbolVariable);
$resolvedVariable = $compilationContext->symbolTable->getVariableForRead($resolved->getCode(), $compilationContext);
$resolvedCode = $compilationContext->backend->getVariableCode($resolvedVariable);
$compilationContext->codePrinter->output('zephir_get_arrval(' . $symbol . ', ' . $resolvedCode . ');');
if ($symbolVariable->isTemporal()) {
$symbolVariable->setIdle(true);
}
return new CompiledExpression('variable', $symbolVariable->getName(), $expression);
default:
throw new CompilerException("Cannot cast: " . $resolved->getType() . " to " . $expression['left'], $expression);
}
break;
case 'object':
switch ($resolved->getType()) {
case 'int':
case 'double':
case 'bool':
case 'null':
case 'string':
case 'array':
$compilationContext->headersManager->add('kernel/operators');
$compilationContext->symbolTable->mustGrownStack(true);
$symbolVariable = $compilationContext->symbolTable->getTempVariable('variable', $compilationContext);
$symbol = $compilationContext->backend->getVariableCode($symbolVariable);
/**
* zephir_convert_to_object use zval variable
* before use with it we create a new variable and assign value of literal
*/
$let = new LetVariable();
$original = $resolved->getOriginal();
$original['operator'] = 'assign';
$let->assign($symbolVariable->getName(), $symbolVariable, $resolved, new ReadDetector(), $compilationContext, $original);
$compilationContext->codePrinter->output('zephir_convert_to_object(' . $symbol . ');');
return new CompiledExpression('variable', $symbolVariable->getName(), $expression);
case 'variable':
$compilationContext->headersManager->add('kernel/operators');
$symbolVariable = $compilationContext->symbolTable->getVariableForRead($resolved->getCode(), $compilationContext, $expression);
$symbol = $compilationContext->backend->getVariableCode($symbolVariable);
if ($symbolVariable->isTemporal()) {
$symbolVariable->setIdle(true);
}
$compilationContext->codePrinter->output('zephir_convert_to_object(' . $symbol . ');');
return new CompiledExpression('variable', $symbolVariable->getName(), $expression);
default:
throw new CompilerException("Cannot cast: " . $resolved->getType() . " to " . $expression['left'], $expression);
}
break;
default:
throw new CompilerException("Cannot cast: " . $resolved->getType() . " to " . $expression['left'], $expression);
}
}
/**
* @param CompilationContext $compilationContext
* @throws CompilerException
*/
public function compile(CompilationContext $compilationContext)
{
$readDetector = new ReadDetector();
$statement = $this->_statement;
foreach ($statement['assignments'] as $assignment) {
$variable = $assignment['variable'];
/**
* Get the symbol from the symbol table if necessary
*/
switch ($assignment['assign-type']) {
case 'static-property':
case 'static-property-append':
case 'static-property-array-index':
case 'static-property-array-index-append':
case 'dynamic-variable-string':
$symbolVariable = null;
break;
case 'array-index':
case 'variable-append':
case 'object-property':
case 'array-index-append':
case 'string-dynamic-object-property':
case 'variable-dynamic-object-property':
$symbolVariable = $compilationContext->symbolTable->getVariableForUpdate($variable, $compilationContext, $assignment);
break;
default:
$symbolVariable = $compilationContext->symbolTable->getVariableForWrite($variable, $compilationContext, $assignment);
break;
}
/**
* Incr/Decr assignments don't require an expression
*/
if (isset($assignment['expr'])) {
$expr = new Expression($assignment['expr']);
switch ($assignment['assign-type']) {
case 'variable':
if (!$readDetector->detect($variable, $assignment['expr'])) {
if (isset($assignment['operator'])) {
if ($assignment['operator'] == 'assign') {
$expr->setExpectReturn(true, $symbolVariable);
}
} else {
$expr->setExpectReturn(true, $symbolVariable);
}
} else {
if (isset($assignment['operator'])) {
if ($assignment['operator'] == 'assign') {
$expr->setExpectReturn(true);
}
} else {
$expr->setExpectReturn(true);
}
}
break;
}
switch ($assignment['expr']['type']) {
case 'property-access':
case 'array-access':
case 'type-hint':
$expr->setReadOnly(true);
break;
}
$resolvedExpr = $expr->compile($compilationContext);
/**
* Bad implemented operators could return values different than objects
*/
if (!is_object($resolvedExpr)) {
throw new CompilerException("Resolved expression is not valid", $assignment['expr']);
}
}
/**
* There are four types of assignments
*/
switch ($assignment['assign-type']) {
case 'variable':
$let = new LetVariable();
$let->assign($variable, $symbolVariable, $resolvedExpr, $readDetector, $compilationContext, $assignment);
break;
case 'variable-append':
$let = new LetVariableAppend();
$let->assign($variable, $symbolVariable, $resolvedExpr, $compilationContext, $assignment);
break;
case 'object-property':
$let = new LetObjectProperty();
$let->assign($variable, $symbolVariable, $resolvedExpr, $compilationContext, $assignment);
break;
case 'variable-dynamic-object-property':
$let = new LetObjectDynamicProperty();
$let->assign($variable, $symbolVariable, $resolvedExpr, $compilationContext, $assignment);
break;
case 'string-dynamic-object-property':
$let = new LetObjectDynamicStringProperty();
$let->assign($variable, $symbolVariable, $resolvedExpr, $compilationContext, $assignment);
break;
case 'static-property':
$let = new LetStaticProperty();
$let->assignStatic($variable, $assignment['property'], $resolvedExpr, $compilationContext, $assignment);
break;
case 'static-property-append':
$let = new LetStaticPropertyAppend();
$let->assignStatic($variable, $assignment['property'], $resolvedExpr, $compilationContext, $assignment);
break;
case 'static-property-array-index':
$let = new LetStaticPropertyArrayIndex();
$let->assignStatic($variable, $assignment['property'], $resolvedExpr, $compilationContext, $assignment);
break;
case 'static-property-array-index-append':
$let = new LetStaticPropertyArrayIndexAppend();
$let->assignStatic($variable, $assignment['property'], $resolvedExpr, $compilationContext, $assignment);
break;
case 'array-index':
$let = new LetArrayIndex();
$let->assign($variable, $symbolVariable, $resolvedExpr, $compilationContext, $assignment);
break;
case 'array-index-append':
$let = new LetArrayIndexAppend();
$let->assign($variable, $symbolVariable, $resolvedExpr, $compilationContext, $assignment);
break;
case 'object-property-append':
$let = new LetObjectPropertyAppend();
$let->assign($variable, $symbolVariable, $resolvedExpr, $compilationContext, $assignment);
break;
case 'object-property-array-index':
$let = new LetObjectPropertyArrayIndex();
$let->assign($variable, $symbolVariable, $resolvedExpr, $compilationContext, $assignment);
break;
case 'object-property-array-index-append':
$let = new LetObjectPropertyArrayIndexAppend();
$let->assign($variable, $symbolVariable, $resolvedExpr, $compilationContext, $assignment);
break;
case 'incr':
$let = new LetIncr();
$let->assign($variable, $symbolVariable, $compilationContext, $assignment);
break;
case 'decr':
$let = new LetDecr();
$let->assign($variable, $symbolVariable, $compilationContext, $assignment);
break;
case 'object-property-incr':
$let = new LetObjectPropertyIncr();
$let->assign($variable, $assignment['property'], $symbolVariable, $compilationContext, $assignment);
break;
case 'object-property-decr':
$let = new LetObjectPropertyDecr();
$let->assign($variable, $assignment['property'], $symbolVariable, $compilationContext, $assignment);
break;
case 'dynamic-variable':
$let = new LetExportSymbol();
$let->assign($variable, $symbolVariable, $resolvedExpr, $compilationContext, $assignment);
break;
case 'dynamic-variable-string':
$let = new LetExportSymbolString();
$let->assign($variable, $symbolVariable, $resolvedExpr, $compilationContext, $assignment);
break;
default:
throw new CompilerException("Unknown assignment: " . $assignment['assign-type'], $assignment);
}
}
}
