ast::Expr类 参考

#include <Expr.hpp>

类 ast::Expr 继承关系图:

Public 成员函数
virtual void	accept (ExprVisitor &visitor)=0
virtual Value *	eval () const =0
Expr *	expand () const
virtual errc_t	setValue (Value *val)
virtual errc_t	setValueDouble (double val)
virtual errc_t	getValueDouble (double &val) const
virtual std::string	getExpression (Object *context=nullptr) const =0
	ObjectNamed ()=default
	ObjectNamed (StringView name)
Public 成员函数 继承自 ast::ObjectNamed
	ObjectNamed ()=default
	ObjectNamed (StringView name)
const std::string &	getName () const override
void	setName (StringView name) override
Public 成员函数 继承自 ast::Object
	Object (Object *parentScope)
	Object (std::nullptr_t)
virtual Class *	getType () const
virtual std::string	getRepresentation () const
const std::string &	name () const
std::string	displayName () 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
template<typename T >
T	getParent () const
bool	isOfType (const Class *type) const
bool	isOfType (StringView typeName) const
template<typename T >
bool	isOfType () const
template<typename Func >
void	addDelayedLink (Func &&link)
template<typename Func >
void	addDelayedLinkIfFailed (Func &&link)
void	resolveLinks ()
bool	readOnly () const
void	setReadOnly (bool readOnly)
bool	active () const
void	setActive (bool active)
bool	isComponent () const
void	setIsComponent (bool isComponent)
bool	isEntity () const
void	setIsEntity (bool isEntity)
const char *	tr (const char *msg) const
	Referenced ()
	Referenced (initial_strong_ref_t)
Public 成员函数 继承自 ast::Referenced
	Referenced (initial_strong_ref_t)
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 ()

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 &)
Protected 成员函数 继承自 ast::Referenced
void	setDestructed ()

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.

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.

getValueDouble()

errc_t ast::Expr::getValueDouble ( double & val ) const

virtual

获取表达式的双精度值

被 ast::ExprAttribute , 以及 ast::ExprCalculation 重载.

ObjectNamed()

ast::ObjectNamed::ObjectNamed ( StringView name )

inlineexplicit

构造函数

参数

name

对象名称

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.

setValueDouble()

errc_t ast::Expr::setValueDouble ( double val )

virtual

设置表达式的双精度值

被 ast::ExprAttribute , 以及 ast::ExprCalculation 重载.

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该类的文档由以下文件生成:

• src/AstScript/Expression/Expr.hpp
• src/AstScript/Expression/Expr.cpp