/**
* Parses an optional statement or returns <b>null</b>.
*
* @return PHP_Depend_Code_ASTNode
* @since 0.9.8
*/
private function _parseOptionalStatement()
{
$tokenType = $this->_tokenizer->peek();
switch ($tokenType) {
case self::T_ECHO:
return $this->_parseEchoStatement();
case self::T_SWITCH:
return $this->_parseSwitchStatement();
case self::T_TRY:
return $this->_parseTryStatement();
case self::T_THROW:
return $this->_parseThrowStatement();
case self::T_IF:
return $this->_parseIfStatement();
case self::T_FOR:
return $this->_parseForStatement();
case self::T_FOREACH:
return $this->_parseForeachStatement();
case self::T_DO:
return $this->_parseDoWhileStatement();
case self::T_WHILE:
return $this->_parseWhileStatement();
case self::T_RETURN:
return $this->_parseReturnStatement();
case self::T_BREAK:
return $this->_parseBreakStatement();
case self::T_CONTINUE:
return $this->_parseContinueStatement();
case self::T_GOTO:
return $this->_parseGotoStatement();
case self::T_GLOBAL:
return $this->_parseGlobalStatement();
case self::T_UNSET:
return $this->_parseUnsetStatement();
case self::T_STRING:
if ($this->_tokenizer->peekNext() === self::T_COLON) {
return $this->_parseLabelStatement();
}
break;
case self::T_FUNCTION:
return $this->_parseFunctionOrClosureDeclaration();
case self::T_COMMENT:
return $this->_parseCommentWithOptionalInlineClassOrInterfaceReference();
case self::T_DOC_COMMENT:
return $this->_builder->buildASTComment($this->_consumeToken(self::T_DOC_COMMENT)->image);
case self::T_CURLY_BRACE_OPEN:
return $this->_parseScopeStatement();
case self::T_CURLY_BRACE_CLOSE:
return null;
case self::T_CLOSE_TAG:
if (($tokenType = $this->_parseNonePhpCode()) === self::T_EOF) {
return null;
}
return $this->_parseOptionalStatement();
}
$this->_tokenStack->push();
$stmt = $this->_builder->buildASTStatement();
if (($expr = $this->_parseOptionalExpression()) != null) {
$stmt->addChild($expr);
}
$this->_parseStatementTermination();
return $this->_setNodePositionsAndReturn($stmt);
}
