/**
* 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_CONST:
return $this->_parseConstantDefinition();
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->_parseRegularScope();
case self::T_DECLARE:
return $this->_parseDeclareStatement();
case self::T_ELSE:
case self::T_ENDIF:
case self::T_ELSEIF:
case self::T_ENDFOR:
case self::T_ENDWHILE:
case self::T_ENDSWITCH:
case self::T_ENDDECLARE:
case self::T_ENDFOREACH:
case self::T_CURLY_BRACE_CLOSE:
return null;
case self::T_DECLARE:
return $this->_parseDeclareStatement();
case self::T_CLOSE_TAG:
if (($tokenType = $this->_parseNonePhpCode()) === self::T_EOF) {
return null;
}
return $this->_parseOptionalStatement();
case self::T_TRAIT:
$package = $this->_getNamespaceOrPackage();
$package->addType($trait = $this->_parseTraitDeclaration());
$this->builder->restoreTrait($trait);
$this->_sourceFile->addChild($trait);
return $trait;
case self::T_INTERFACE:
$package = $this->_getNamespaceOrPackage();
$package->addType($interface = $this->_parseInterfaceDeclaration());
$this->builder->restoreInterface($interface);
$this->_sourceFile->addChild($interface);
return $interface;
case self::T_CLASS:
case self::T_FINAL:
case self::T_ABSTRACT:
$package = $this->_getNamespaceOrPackage();
$package->addType($class = $this->_parseClassDeclaration());
$this->builder->restoreClass($class);
$this->_sourceFile->addChild($class);
return $class;
}
$this->_tokenStack->push();
$stmt = $this->builder->buildASTStatement();
if (($expr = $this->_parseOptionalExpression()) != null) {
$stmt->addChild($expr);
}
$this->_parseStatementTermination();
return $this->_setNodePositionsAndReturn($stmt);
}
/**
* This method can be used to register an existing trait in the current
* class context.
*
* @param PHP_Depend_Code_Trait $trait The trait instance.
*
* @return void
* @since 1.0.0
*/
public function registerTrait(PHP_Depend_Code_Trait $trait)
{
self::$builder->restoreTrait($trait);
}