GEO::lua_to< T > Class Template Reference

Converts LUA variables to C++ variables. More...

#include <geogram/lua/lua_wrap.h>

Public Member Functions
	lua_to (lua_State *L, int idx)
	lua_to constructor.
	operator T () const
	Gets the converted value.

Static Public Member Functions
static bool	can_convert (lua_State *L, int idx)
	Tests whether a LUA variable can be converted to a C++ variable.

Protected Attributes
T	x_

Detailed Description

template<class T>
class GEO::lua_to< T >

Converts LUA variables to C++ variables.

This version is a placeholder, the actual implementation is done in the template specializations.

Definition at line 243 of file lua_wrap.h.

Constructor & Destructor Documentation

lua_to()

template<class T >

GEO::lua_to< T >::lua_to ( lua_State *  L, int  idx  )

inline

lua_to constructor.

Does the actual conversion. The converted variable is memorized in a member. It can be accesed by a conversion operator. Supposing that my_function() takes a std::string and an int as arguments, it can be called as follows:

my_function(lua_to<std::string>(L,1), lua_to<int>(L,2));

Parameters

[in]	L	a pointer to the LUA state.
[in]	idx	the index of the variable to be converted.

Definition at line 257 of file lua_wrap.h.

Member Function Documentation

can_convert()

template<class T >

static bool GEO::lua_to< T >::can_convert ( lua_State *  L, int  idx  )

inlinestatic

Tests whether a LUA variable can be converted to a C++ variable.

Note

It would have been possible to make the constructor throw an exception on conversion error, but exceptions are not well supported by Emscripten so we have separated validity check from conversion.

Parameters

[in]	L	a pointer to the LUA state.
[in]	idx	the index of the variable to be converted.

Return values

true	if the LUA variable can be converted to a C++ variable.
false	otherwise.

Definition at line 275 of file lua_wrap.h.

operator T()

template<class T >

GEO::lua_to< T >::operator T ( ) const

inline

Gets the converted value.

Returns

the converted value.

Definition at line 285 of file lua_wrap.h.

Member Data Documentation

x_

template<class T >

T GEO::lua_to< T >::x_

protected

Definition at line 289 of file lua_wrap.h.

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The documentation for this class was generated from the following file:

• geogram/lua/lua_wrap.h