/**
* Parse an expression operand.
* @return Node
* @throws ParserException
*/
private function exprOperand()
{
switch ($this->currentType) {
case T_STRING_VARNAME:
case T_CLASS_C:
case T_LNUMBER:
case T_DNUMBER:
case T_LINE:
case T_FILE:
case T_DIR:
case T_TRAIT_C:
case T_METHOD_C:
case T_FUNC_C:
case T_NS_C:
case T_YIELD:
return $this->mustMatchToken($this->currentType);
case T_CONSTANT_ENCAPSED_STRING:
return $this->arrayDeference($this->mustMatchToken(T_CONSTANT_ENCAPSED_STRING));
case T_ARRAY:
$node = new ArrayNode();
$this->mustMatch(T_ARRAY, $node);
$this->mustMatch('(', $node, 'openParen');
$this->arrayPairList($node, ')');
$this->mustMatch(')', $node, 'closeParen', TRUE);
return $this->arrayDeference($node);
case '[':
$node = new ArrayNode();
$this->mustMatch('[', $node);
$this->arrayPairList($node, ']');
$this->mustMatch(']', $node, NULL, TRUE);
return $this->arrayDeference($node);
case '(':
$node = new ParenthesisNode();
$this->mustMatch('(', $node, 'openParen');
if ($this->currentType === T_NEW) {
$node->addChild($this->newExpr(), 'expression');
$this->mustMatch(')', $node, 'closeParen', TRUE);
$node = $this->objectDereference($this->arrayDeference($node));
} elseif ($this->currentType === T_YIELD) {
$node->addChild($this->_yield());
$this->mustMatch(')', $node, 'closeParen', TRUE);
} else {
$node->addChild($this->expr());
$this->mustMatch(')', $node, 'closeParen', TRUE);
}
return $node;
case T_START_HEREDOC:
$node = new HeredocNode();
$this->mustMatch(T_START_HEREDOC, $node);
if ($this->tryMatch(T_END_HEREDOC, $node, NULL, TRUE)) {
return $node;
} else {
$this->encapsList($node, T_END_HEREDOC, TRUE);
$this->mustMatch(T_END_HEREDOC, $node, NULL, TRUE);
return $node;
}
case '"':
$node = new InterpolatedStringNode();
$this->mustMatch('"', $node);
$this->encapsList($node, '"');
$this->mustMatch('"', $node);
return $node;
case T_STRING:
case T_NS_SEPARATOR:
case T_NAMESPACE:
$namespace_path = $this->name();
if ($this->currentType === T_DOUBLE_COLON) {
return $this->exprClass($namespace_path);
} elseif ($this->currentType === '(') {
return $this->functionCall($namespace_path);
} else {
$constant_name = strtolower($namespace_path->getText());
if ($constant_name === 'true') {
$node = new TrueNode();
} elseif ($constant_name === 'false') {
$node = new FalseNode();
} elseif ($constant_name === 'null') {
$node = new NullNode();
} else {
$node = new ConstantNode();
}
$node->addChild($namespace_path, 'constantName');
return $node;
}
case T_STATIC:
$static = $this->mustMatchToken(T_STATIC);
if ($this->currentType === T_FUNCTION) {
return $this->anonymousFunction($static);
} else {
return $this->exprClass($static);
}
case '$':
case T_VARIABLE:
$operand = $this->indirectReference();
if (!$operand instanceof VariableVariableNode && $this->currentType === T_DOUBLE_COLON) {
return $this->exprClass($operand);
} elseif ($this->currentType === '(') {
return $this->functionCall($operand, TRUE);
} else {
return $this->objectDereference($operand);
}
case T_ISSET:
$node = new IssetNode();
$this->mustMatch(T_ISSET, $node, 'name');
$arguments = new CommaListNode();
$this->mustMatch('(', $node, 'openParen');
$node->addChild($arguments, 'arguments');
do {
$arguments->addChild($this->variable());
} while ($this->tryMatch(',', $arguments));
$this->mustMatch(')', $node, 'closeParen', TRUE);
return $node;
case T_EMPTY:
case T_EVAL:
if ($this->currentType === T_EMPTY) {
$node = new EmptyNode();
} else {
$node = new EvalNode();
}
$this->mustMatch($this->currentType, $node, 'name');
$arguments = new CommaListNode();
$this->mustMatch('(', $node, 'openParen');
$node->addChild($arguments, 'arguments');
$arguments->addChild($this->expr());
$this->mustMatch(')', $node, 'closeParen', TRUE);
return $node;
case T_INCLUDE:
case T_REQUIRE:
case T_INCLUDE_ONCE:
case T_REQUIRE_ONCE:
if ($this->currentType === T_INCLUDE) {
$node = new IncludeNode();
} elseif ($this->currentType === T_INCLUDE_ONCE) {
$node = new IncludeOnceNode();
} elseif ($this->currentType === T_REQUIRE) {
$node = new RequireNode();
} else {
$node = new RequireOnceNode();
}
$this->mustMatch($this->currentType, $node);
$node->addChild($this->expr(), 'expression');
return $node;
case T_NEW:
return $this->newExpr();
case T_LIST:
return $this->_list();
case T_EXIT:
$node = new ExitNode();
$this->mustMatch(T_EXIT, $node, NULL, TRUE);
if ($this->currentType !== '(') {
return $node;
}
$this->mustMatch('(', $node, 'openParen');
if ($this->tryMatch(')', $node, 'closeParen', TRUE)) {
return $node;
}
if ($this->currentType === T_YIELD) {
$node->addChild($this->_yield(), 'expression');
} else {
$node->addChild($this->expr(), 'expression');
}
$this->mustMatch(')', $node, 'closeParen', TRUE);
return $node;
case T_FUNCTION:
return $this->anonymousFunction();
case '`':
return $this->backtick();
}
throw new ParserException($this->filename, $this->iterator->getLineNumber(), $this->iterator->getColumnNumber(), "excepted expression operand but got " . $this->current->getTypeName());
}
