/**
* This method parses a compound variable like:
*
* <code>
* // ----------------
* return ${'Foo' . 'Bar'};
* // ----------------
* </code>
*
* @param PHP_Depend_Token $token The dollar token.
*
* @return PHP_Depend_Code_ASTCompoundVariable
* @since 0.10.0
*/
private function _parseCompoundVariable(PHP_Depend_Token $token)
{
return $this->_parseBraceExpression($this->builder->buildASTCompoundVariable($token->image), $this->consumeToken(self::T_CURLY_BRACE_OPEN), self::T_CURLY_BRACE_CLOSE);
}
/**
* This method implements a decision point between compound-variables and
* variable-variable. It expects that the next token in the token-stream is
* of type <b>T_DOLLAR</b> and removes it from the stream. Then this method
* peeks the next available token when it is of type <b>T_CURLY_BRACE_OPEN</b>
* this is compound variable, otherwise it can be a variable-variable or a
* compound-variable.
*
* @return PHP_Depend_Code_ASTNode
* @throws PHP_Depend_Parser_Exception When an error occured during the
* parsing process.
* @throws PHP_Depend_Parser_UnexpectedTokenException When the actual token
* is not a valid variable token.
* @since 0.9.6
*/
private function _parseCompoundVariableOrVariableVariable()
{
$this->_tokenStack->push();
// Read the dollar token
$token = $this->_consumeToken(self::T_DOLLAR);
$this->_consumeComments();
// Get next token type
$tokenType = $this->_tokenizer->peek();
// T_DOLLAR|T_VARIABLE === Variable variable,
// T_CURLY_BRACE_OPEN === Compound variable
switch ($tokenType) {
case self::T_DOLLAR:
case self::T_VARIABLE:
$variable = $this->_builder->buildASTVariableVariable($token->image);
$variable->addChild($this->_parseCompoundVariableOrVariableVariableOrVariable());
break;
default:
$variable = $this->_builder->buildASTCompoundVariable($token->image);
$variable->addChild($this->_parseCompoundExpression());
break;
}
return $this->_setNodePositionsAndReturn($variable);
}
