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|
/*
* base_actions.h
*
*
* Created by Andreas Vox on 02.06.06.
* Copyright 2006 under GPL2. All rights reserved.
*
*/
#ifndef BASE_ACTIONS_H
#define BASE_ACTIONS_H
/*****
Defines the following actions:
Attribute<D>( name, def) - -> D
Attribute<D>( name ) - -> D
*RefAttribute<D>( name ) - -> D
*Get<O,D>( gen<O>, fun ) - -> D
*Set<O,D>( gen<O>, fun, gen<D> ) - -> -
*Top<D>( n ) - -> D
*Bottom<D>( n ) - -> D
*WithText<O,D>( gen<O>, fun ) - -> -
*Invoke<O, F, A1, ...>(fun, a1, ...) O -> O
*InvokeLater<O, F, A1, ...>(fun, a1, ...) O -> O
*Call<F,A1, ..., An>(fun, a1, ..., an) - -> -
*CallLater<F,A1, ..., An>(fun, a1, ..., an) - -> -
*Filter<D,E> ( gen<D>, fun ) - -> E
*Combine<D,E,F> ( gen<D>, gen<D>, fun) - -> F
*****/
/**
* Converts an attribute to an object of type Data_Type and pushes it onto the stack.
*/
template<class Data_Type>
class Attribute_body : public Generator_body<Data_Type>
{
public:
Attribute_body(const Xml_string& name)
: name_(name), default_(NULL)
{}
Attribute_body(const Xml_string& name, const Data_Type& def)
: name_(name), default_(new Data_Type(def))
{}
~Attribute_body()
{
if (default_)
delete default_;
}
void begin(const Xml_string&, Xml_attr)
{
if (attr.contains(name_))
dig->push(new Data_Type(attr[name_]));
else if (default_)
dig->push(new Data_Type(default_));
else
dig->push(NULL);
}
private:
const Xml_string name_;
const Data_Type* default_;
};
template <class Type>
struct Attribute : public MakeGenerator<Attribute_body<Type>, const Xml_string&, const Type&>
{
Attribute(const Xml_string& name)
: MakeGenerator<Attribute_body<Type>, const Xml_string&>::MakeGenerator(name) {}
Attribute(const Xml_string& name, const Type& def)
: MakeGenerator<Attribute_body<Type>, const Xml_string&, const Type&>::MakeGenerator(name, def) {}
};
/*
template<class Functor>
class Call0 : public Action
{
public:
Call0(Functor f) : fun(f)
{}
void begin(const std::string, std::map<std::string,std::string> attr)
{
fun();
}
private:
Functor fun;
};
template<class Functor, class Arg1>
class Call1 : public Action
{
public:
Call1(Functor f, Generator<Arg1> a1) : fun(f), arg1(a1)
{}
void begin(const std::string, std::map<std::string,std::string> attr)
{
fun(arg1->eval(digester(), tag, attr));
}
private:
Functor fun;
Generator<Arg1> arg1;
};
template<class Functor, class Arg1, class Arg2>
class Call2 : public Action
{
public:
Call2(Functor f, Generator<Arg1>* a1, Generator<Arg2>* a2) : fun(f), arg1(a1), arg2(a2)
{}
void begin(const std::string, std::map<std::string,std::string> attr)
{
fun(arg1->eval(digester(), tag, attr),
arg2->eval(digester(), tag, attr));
}
private:
Functor fun;
Generator<Arg1> arg1;
Generator<Arg2> arg2;
};
/* Baustelle
template<class Obj_Type, class Data_Type>
class Invoke : public Action
{
public:
Invoke(void (Obj_Type::*inv)(Data_Type&)) : set_(set) {}
void end(const std::string);
private:
void (Obj_Type::*set_)(Data_Type&);
};
*/
#endif
|
