ast::Expr类 参考

#include <Expr.hpp>

类 ast::Expr 继承关系图:

Public 成员函数
void	setName (StringView name) override
virtual void	accept (ExprVisitor &visitor)=0
virtual Value *	eval () const =0
virtual Expr *	exec () const
virtual errc_t	setValue (Value *val)
virtual std::string	getExpression (Object *context=nullptr) const =0
	Object ()
	Object (Object *parentScope)
	Object (std::nullptr_t)
	Object (initial_strong_ref_t)
	Object (const Object &obj)
Public 成员函数 继承自 ast::Object
	Object (Object *parentScope)
	Object (std::nullptr_t)
	Object (initial_strong_ref_t)
virtual Class *	getType () const
virtual std::string	getRepresentation () const
virtual const std::string &	getName () const
const std::string &	name () const
errc_t	showEditDialog ()
Attribute	attr (StringView path)
errc_t	getAttrBool (StringView path, bool &value) const
errc_t	getAttrInt (StringView path, int &value) const
errc_t	getAttrDouble (StringView path, double &value) const
errc_t	getAttrString (StringView path, std::string &value) const
errc_t	getAttrObject (StringView path, Object *&value) const
double	getAttrDouble (StringView path) const
int	getAttrInt (StringView path) const
bool	getAttrBool (StringView path) const
std::string	getAttrString (StringView path) const
Object *	getAttrObject (StringView path) const
errc_t	setAttrBool (StringView path, bool value)
errc_t	setAttrInt (StringView path, int value)
errc_t	setAttrDouble (StringView path, double value)
errc_t	setAttrString (StringView path, StringView value)
errc_t	setAttrObject (StringView path, Object *value)
Class *	type () const
const std::string &	typeName () const
Property *	getProperty (StringView fieldName) const
ObjectId	getID () const
errc_t	setParentScope (Object *parentScope)
Object *	getParentScope () const
bool	isOfType (const Class *type) const
bool	isOfType (StringView typeName) const
template<typename T >
bool	isOfType () const
uint32_t	refCount () const
uint32_t	weakRefCount () const
bool	isDestructed () const
void	destruct ()
uint32_t	incWeakRef ()
uint32_t	decWeakRef ()
uint32_t	incRef ()
uint32_t	decRef ()
uint32_t	decRefNoDelete ()
template<typename Func >
void	addDelayedLink (Func &&link)
template<typename Func >
void	addDelayedLinkIfFailed (Func &&link)
void	resolveLinks ()

额外继承的成员函数
静态 Public 成员函数 继承自 ast::Object
static Object *	Resolve (StringView value)
static void	ClassInit (Class *cls)
static Class *	StaticType ()
静态 Public 属性 继承自 ast::Object
static Class	staticType
Protected 成员函数 继承自 ast::Object
	Object (const Object &obj)
Object &	operator= (const Object &)

详细描述

表达式基类

表达式是脚本语言中的基本构造单元，可以是常量、变量、运算符表达式、函数调用等 不同类型的表达式通过继承自Expr类来实现多态行为 表达式可以嵌套组合，形成复杂的计算逻辑 表达式的特点是“可以求值”，即每个表达式在求值后都会产生一个结果值

成员函数说明

accept()

virtual void ast::Expr::accept ( ExprVisitor & visitor )

pure virtual

接受表达式访问者

参数

visitor

表达式访问者对象

在 ast::ExprCurrentScStateCalculation 内被实现.

eval()

virtual Value * ast::Expr::eval ( ) const

pure virtual

求值

返回

Value* 求值结果

在 ast::ExprAttribute, ast::ExprBlock, ast::ExprCalculation, ast::ExprCall, ast::ExprCatHorizontal, ast::ExprCatVertical, ast::ExprCondition, ast::ExprCurrentScStateCalculation, ast::ExprForRange, ast::ExprIf, ast::ExprMacroExpand, ast::ExprRange, ast::ExprVector, ast::ExprWhile, ast::OpAssign, ast::OpBin, ast::OpUnary, ast::Symbol, ast::Value , 以及 ast::Variable 内被实现.

exec()

virtual Expr * ast::Expr::exec ( ) const

inlinevirtual

执行

这个方法可能用于脚本的解析期

返回

Expr* 执行结果

被 ast::Symbol 重载.

getExpression()

virtual std::string ast::Expr::getExpression ( Object * context = nullptr ) const

pure virtual

获取表达式的字符串表示

参数

context

可选的上下文对象，用于解析变量等

返回

std::string 表达式的字符串表示

在 ast::ExprAttribute, ast::ExprBlock, ast::ExprCalculation, ast::ExprCall, ast::ExprCatHorizontal, ast::ExprCatVertical, ast::ExprCondition, ast::ExprCurrentScStateCalculation, ast::ExprForRange, ast::ExprIf, ast::ExprMacroExpand, ast::ExprRange, ast::ExprVector, ast::ExprWhile, ast::OpAssign, ast::OpBin, ast::OpUnary, ast::Symbol, ast::ValDict, ast::ValNamedVector, ast::ValNull, ast::ValQuantity, ast::ValRange, ast::ValScalar< Scalar >, ast::ValScalar< bool >, ast::ValScalar< double >, ast::ValScalar< int >, ast::ValString , 以及 ast::Variable 内被实现.

Object()

ast::Object::Object ( initial_strong_ref_t )

inline

构造函数，用于初始化对象的强引用计数为1

参数

initial_strong_ref_t

初始化强引用计数的标记

setName()

void ast::Expr::setName ( StringView name )

inlineoverridevirtual

设置对象的名称

参数

name

对象名称

实现了 ast::Object.

被 ast::Variable 重载.

setValue()

virtual errc_t ast::Expr::setValue ( Value * val )

inlinevirtual

设置表达式的值

被 ast::ExprAttribute, ast::ExprBlock, ast::ExprCalculation, ast::ExprCondition, ast::ExprForRange, ast::ExprIf, ast::ExprWhile, ast::Op, ast::Symbol, ast::Value , 以及 ast::Variable 重载.

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该类的文档由以下文件生成:

• src/AstScript/Expression/Expr.hpp