Updates object properties dynamically
/**
* @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);
}
}
}
