[wxWidgets.git] / include / wx / strvararg.h

///////////////////////////////////////////////////////////////////////////////
// Name:        wx/strvararg.h
// Purpose:     macros for implementing type-safe vararg passing of strings
// Author:      Vaclav Slavik
// Created:     2007-02-19
// RCS-ID:      $Id$
// Copyright:   (c) 2007 REA Elektronik GmbH
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

#ifndef _WX_STRVARARG_H_
#define _WX_STRVARARG_H_

#include "wx/platform.h"
#if wxONLY_WATCOM_EARLIER_THAN(1,4)
    #error "OpenWatcom version >= 1.4 is required to compile this code"
#endif

#include "wx/chartype.h"

class WXDLLIMPEXP_BASE wxCStrData;
class WXDLLIMPEXP_BASE wxString;
class WXDLLIMPEXP_BASE wxCharBuffer;
class WXDLLIMPEXP_BASE wxWCharBuffer;


// ----------------------------------------------------------------------------
// WX_DEFINE_VARARG_FUNC* macros
// ----------------------------------------------------------------------------

// This macro is used to implement type-safe wrappers for variadic functions
// that accept strings as arguments. This makes it possible to pass char*,
// wchar_t* or even wxString (as opposed to having to use wxString::c_str())
// to e.g. wxPrintf().
//
// This is done by defining a set of N template function taking 1..N arguments
// (currently, N is set to 30 in this header). These functions are just thin
// wrappers around another variadic function (@a impl) and the only thing
// the wrapper does is that it normalizes the arguments passed in so that
// they are of the type expected by variadic functions taking string
// arguments, i.e., char* or wchar_t*, depending on the build:
//   * char* in the current locale's charset in ANSI build
//   * whchar_t* in the Unicode build
//
// Parameters:
//        rettype   Functions' return type.
//        name      Name of the function.
//        impl      Name of the variadic function that implements 'name'.
#define WX_DEFINE_VARARG_FUNC(rettype, name, impl)                        \
        _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS,                              \
                        _WX_VARARG_DEFINE_FUNC,                           \
                        rettype, name, impl)

// Like WX_DEFINE_VARARG_FUNC, but for variadic functions that don't return
// a value.
#define WX_DEFINE_VARARG_FUNC_VOID(name, impl)                            \
        _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS,                              \
                        _WX_VARARG_DEFINE_FUNC_VOID,                      \
                        void, name, impl)

// Like WX_DEFINE_VARARG_FUNC_VOID, but instead of wrapping an implementation
// function, does nothing in defined functions' bodies.
//
// Used to implement wxLogXXX functions if wxUSE_LOG=0.
#define WX_DEFINE_VARARG_FUNC_NOP(name)                                   \
        _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS,                              \
                        _WX_VARARG_DEFINE_FUNC_NOP,                       \
                        void, name, dummy)

// ----------------------------------------------------------------------------
// implementation
// ----------------------------------------------------------------------------

// Converts an argument passed to wxPrint etc. into standard form expected,
// by wxXXX functions, e.g. all strings (wxString, char*, wchar_t*) are
// converted into wchar_t* or char* depending on the build.
template<typename T>
struct wxArgNormalizer
{
    wxArgNormalizer(const T& value) : m_value(value) {}

    // Returns the value in a form that can be safely passed to real vararg
    // functions. In case of strings, this is char* in ANSI build and wchar_t*
    // in Unicode build.
    const T& get() const { return m_value; }

    const T& m_value;
};

// special cases for converting strings:

template<>
struct WXDLLIMPEXP_BASE wxArgNormalizer<const wxCStrData&>
{
    wxArgNormalizer(const wxCStrData& value) : m_value(value) {}
    const wxStringCharType *get() const;

    const wxCStrData& m_value;
};

template<>
struct wxArgNormalizer<wxCStrData> : public wxArgNormalizer<const wxCStrData&>
{
    wxArgNormalizer(const wxCStrData& value)
        : wxArgNormalizer<const wxCStrData&>(value) {}
};

template<>
struct WXDLLIMPEXP_BASE wxArgNormalizer<const wxString&>
{
    wxArgNormalizer(const wxString& value) : m_value(value) {}
    const wxStringCharType *get() const;

    const wxString& m_value;
};

template<>
struct wxArgNormalizer<wxString> : public wxArgNormalizer<const wxString&>
{
    wxArgNormalizer(const wxString& value)
        : wxArgNormalizer<const wxString&>(value) {}
};

#if wxUSE_UNICODE_WCHAR

template<>
struct WXDLLIMPEXP_BASE wxArgNormalizer<const char*>
{
    wxArgNormalizer(const char *value);
    ~wxArgNormalizer();
    const wchar_t *get() const;

    wxWCharBuffer *m_value;
};

template<>
struct wxArgNormalizer<char*> : public wxArgNormalizer<const char*>
{
    wxArgNormalizer(char *value)
        : wxArgNormalizer<const char*>(value) {}
};

#elif wxUSE_WCHAR_T // !wxUSE_UNICODE_WCHAR && wxUSE_WCHAR_T

template<>
struct WXDLLIMPEXP_BASE wxArgNormalizer<const wchar_t*>
{
    wxArgNormalizer(const wchar_t *value);
    ~wxArgNormalizer();
    const char *get() const;

    wxCharBuffer *m_value;
};

template<>
struct wxArgNormalizer<wchar_t*> : public wxArgNormalizer<const wchar_t*>
{
    wxArgNormalizer(wchar_t *value)
        : wxArgNormalizer<const wchar_t*>(value) {}
};

#endif // wxUSE_UNICODE_WCHAR / !wxUSE_UNICODE_WCHAR && wxUSE_WCHAR_T

// versions for passing wx[W]CharBuffer:
template<>
struct WXDLLIMPEXP_BASE wxArgNormalizer<wxCharBuffer>
            : public wxArgNormalizer<const char*>
{
    wxArgNormalizer(const wxCharBuffer& buf);
};

template<>
struct WXDLLIMPEXP_BASE wxArgNormalizer<wxWCharBuffer>
            : public wxArgNormalizer<const wchar_t*>
{
    wxArgNormalizer(const wxWCharBuffer& buf);
};


// NB: The vararg emulation code is limited to 30 arguments at the moment.
//     If you need more, you need to
//        1) increase the value of _WX_VARARG_MAX_ARGS
//        2) add _WX_VARARG_JOIN_* and _WX_VARARG_ITER_* up to the new
//           _WX_VARARG_MAX_ARGS value to the lists below
#define _WX_VARARG_MAX_ARGS        30

#define _WX_VARARG_JOIN_1(m)                                 m(1)
#define _WX_VARARG_JOIN_2(m)       _WX_VARARG_JOIN_1(m),     m(2)
#define _WX_VARARG_JOIN_3(m)       _WX_VARARG_JOIN_2(m),     m(3)
#define _WX_VARARG_JOIN_4(m)       _WX_VARARG_JOIN_3(m),     m(4)
#define _WX_VARARG_JOIN_5(m)       _WX_VARARG_JOIN_4(m),     m(5)
#define _WX_VARARG_JOIN_6(m)       _WX_VARARG_JOIN_5(m),     m(6)
#define _WX_VARARG_JOIN_7(m)       _WX_VARARG_JOIN_6(m),     m(7)
#define _WX_VARARG_JOIN_8(m)       _WX_VARARG_JOIN_7(m),     m(8)
#define _WX_VARARG_JOIN_9(m)       _WX_VARARG_JOIN_8(m),     m(9)
#define _WX_VARARG_JOIN_10(m)      _WX_VARARG_JOIN_9(m),     m(10)
#define _WX_VARARG_JOIN_11(m)      _WX_VARARG_JOIN_10(m),    m(11)
#define _WX_VARARG_JOIN_12(m)      _WX_VARARG_JOIN_11(m),    m(12)
#define _WX_VARARG_JOIN_13(m)      _WX_VARARG_JOIN_12(m),    m(13)
#define _WX_VARARG_JOIN_14(m)      _WX_VARARG_JOIN_13(m),    m(14)
#define _WX_VARARG_JOIN_15(m)      _WX_VARARG_JOIN_14(m),    m(15)
#define _WX_VARARG_JOIN_16(m)      _WX_VARARG_JOIN_15(m),    m(16)
#define _WX_VARARG_JOIN_17(m)      _WX_VARARG_JOIN_16(m),    m(17)
#define _WX_VARARG_JOIN_18(m)      _WX_VARARG_JOIN_17(m),    m(18)
#define _WX_VARARG_JOIN_19(m)      _WX_VARARG_JOIN_18(m),    m(19)
#define _WX_VARARG_JOIN_20(m)      _WX_VARARG_JOIN_19(m),    m(20)
#define _WX_VARARG_JOIN_21(m)      _WX_VARARG_JOIN_20(m),    m(21)
#define _WX_VARARG_JOIN_22(m)      _WX_VARARG_JOIN_21(m),    m(22)
#define _WX_VARARG_JOIN_23(m)      _WX_VARARG_JOIN_22(m),    m(23)
#define _WX_VARARG_JOIN_24(m)      _WX_VARARG_JOIN_23(m),    m(24)
#define _WX_VARARG_JOIN_25(m)      _WX_VARARG_JOIN_24(m),    m(25)
#define _WX_VARARG_JOIN_26(m)      _WX_VARARG_JOIN_25(m),    m(26)
#define _WX_VARARG_JOIN_27(m)      _WX_VARARG_JOIN_26(m),    m(27)
#define _WX_VARARG_JOIN_28(m)      _WX_VARARG_JOIN_27(m),    m(28)
#define _WX_VARARG_JOIN_29(m)      _WX_VARARG_JOIN_28(m),    m(29)
#define _WX_VARARG_JOIN_30(m)      _WX_VARARG_JOIN_29(m),    m(30)

#define _WX_VARARG_ITER_1(m,a,b,c)                               m(1,a,b,c)
#define _WX_VARARG_ITER_2(m,a,b,c)   _WX_VARARG_ITER_1(m,a,b,c)  m(2,a,b,c)
#define _WX_VARARG_ITER_3(m,a,b,c)   _WX_VARARG_ITER_2(m,a,b,c)  m(3,a,b,c)
#define _WX_VARARG_ITER_4(m,a,b,c)   _WX_VARARG_ITER_3(m,a,b,c)  m(4,a,b,c)
#define _WX_VARARG_ITER_5(m,a,b,c)   _WX_VARARG_ITER_4(m,a,b,c)  m(5,a,b,c)
#define _WX_VARARG_ITER_6(m,a,b,c)   _WX_VARARG_ITER_5(m,a,b,c)  m(6,a,b,c)
#define _WX_VARARG_ITER_7(m,a,b,c)   _WX_VARARG_ITER_6(m,a,b,c)  m(7,a,b,c)
#define _WX_VARARG_ITER_8(m,a,b,c)   _WX_VARARG_ITER_7(m,a,b,c)  m(8,a,b,c)
#define _WX_VARARG_ITER_9(m,a,b,c)   _WX_VARARG_ITER_8(m,a,b,c)  m(9,a,b,c)
#define _WX_VARARG_ITER_10(m,a,b,c)  _WX_VARARG_ITER_9(m,a,b,c)  m(10,a,b,c)
#define _WX_VARARG_ITER_11(m,a,b,c)  _WX_VARARG_ITER_10(m,a,b,c) m(11,a,b,c)
#define _WX_VARARG_ITER_12(m,a,b,c)  _WX_VARARG_ITER_11(m,a,b,c) m(12,a,b,c)
#define _WX_VARARG_ITER_13(m,a,b,c)  _WX_VARARG_ITER_12(m,a,b,c) m(13,a,b,c)
#define _WX_VARARG_ITER_14(m,a,b,c)  _WX_VARARG_ITER_13(m,a,b,c) m(14,a,b,c)
#define _WX_VARARG_ITER_15(m,a,b,c)  _WX_VARARG_ITER_14(m,a,b,c) m(15,a,b,c)
#define _WX_VARARG_ITER_16(m,a,b,c)  _WX_VARARG_ITER_15(m,a,b,c) m(16,a,b,c)
#define _WX_VARARG_ITER_17(m,a,b,c)  _WX_VARARG_ITER_16(m,a,b,c) m(17,a,b,c)
#define _WX_VARARG_ITER_18(m,a,b,c)  _WX_VARARG_ITER_17(m,a,b,c) m(18,a,b,c)
#define _WX_VARARG_ITER_19(m,a,b,c)  _WX_VARARG_ITER_18(m,a,b,c) m(19,a,b,c)
#define _WX_VARARG_ITER_20(m,a,b,c)  _WX_VARARG_ITER_19(m,a,b,c) m(20,a,b,c)
#define _WX_VARARG_ITER_21(m,a,b,c)  _WX_VARARG_ITER_20(m,a,b,c) m(21,a,b,c)
#define _WX_VARARG_ITER_22(m,a,b,c)  _WX_VARARG_ITER_21(m,a,b,c) m(22,a,b,c)
#define _WX_VARARG_ITER_23(m,a,b,c)  _WX_VARARG_ITER_22(m,a,b,c) m(23,a,b,c)
#define _WX_VARARG_ITER_24(m,a,b,c)  _WX_VARARG_ITER_23(m,a,b,c) m(24,a,b,c)
#define _WX_VARARG_ITER_25(m,a,b,c)  _WX_VARARG_ITER_24(m,a,b,c) m(25,a,b,c)
#define _WX_VARARG_ITER_26(m,a,b,c)  _WX_VARARG_ITER_25(m,a,b,c) m(26,a,b,c)
#define _WX_VARARG_ITER_27(m,a,b,c)  _WX_VARARG_ITER_26(m,a,b,c) m(27,a,b,c)
#define _WX_VARARG_ITER_28(m,a,b,c)  _WX_VARARG_ITER_27(m,a,b,c) m(28,a,b,c)
#define _WX_VARARG_ITER_29(m,a,b,c)  _WX_VARARG_ITER_28(m,a,b,c) m(29,a,b,c)
#define _WX_VARARG_ITER_30(m,a,b,c)  _WX_VARARG_ITER_29(m,a,b,c) m(30,a,b,c)

// This macro calls another macro 'm' passed as second argument 'N' times,
// with its only argument set to 1..N, and concatenates the results using
// comma as separator.
//
// An example:
//     #define foo(i)  x##i
//     // this expands to "x1,x2,x3,x4"
//     _WX_VARARG_JOIN(4, foo)
//
//
// N must not be greater than _WX_VARARG_MAX_ARGS (=30).
#define _WX_VARARG_JOIN(N, m)             _WX_VARARG_JOIN_IMPL(N, m)
#define _WX_VARARG_JOIN_IMPL(N, m)        _WX_VARARG_JOIN_##N(m)

// This macro calls another macro 'm' passed as second argument 'N' times, with
// its first argument set to 1..N and the remaining arguments set to 'a', 'b'
// and 'c'. The results are separated with whitespace in the expansion.
//
// An example:
//     // this macro expands to:
//     //     foo(1,a,b,c)
//     //     foo(2,a,b,c)
//     //     foo(3,a,b,c)
//     _WX_VARARG_ITER(3, foo, a, b, c)
//
// N must not be greater than _WX_VARARG_MAX_ARGS (=30).
#define _WX_VARARG_ITER(N, m,a,b,c)       _WX_VARARG_ITER_IMPL(N, m, a, b, c)
#define _WX_VARARG_ITER_IMPL(N, m,a,b,c)  _WX_VARARG_ITER_##N(m, a, b, c)

// Generates code snippet for i-th argument in vararg function's prototype.
#define _WX_VARARG_ARG(i)          T##i a##i

// Like _WX_VARARG_ARG_UNUSED, but outputs argument's type with WXUNUSED.
#define _WX_VARARG_ARG_UNUSED(i)   T##i WXUNUSED(a##i)

// Generates code snippet for i-th type in vararg function's template<...>.
#define _WX_VARARG_TEMPL(i)        typename T##i

// Generates code snippet for passing i-th argument of vararg function
// wrapper to its implementation, normalizing it in the process
#define _WX_VARARG_PASS(i)         wxArgNormalizer<T##i>(a##i).get()


// Macro to be used with _WX_VARARG_ITER in the implementation of
// WX_DEFINE_VARARG_FUNC (see its documentation for the meaning of arguments)
#define _WX_VARARG_DEFINE_FUNC(N, rettype, name, impl)                      \
    template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)>                          \
    rettype name(_WX_VARARG_JOIN(N, _WX_VARARG_ARG))                        \
    {                                                                       \
        return impl(_WX_VARARG_JOIN(N, _WX_VARARG_PASS));                   \
    }

// Macro to be used with _WX_VARARG_ITER in the implementation of
// WX_DEFINE_VARARG_FUNC_VOID (see its documentation for the meaning of
// arguments; rettype is ignored and is used only to satisfy _WX_VARARG_ITER's
// requirements).
#define _WX_VARARG_DEFINE_FUNC_VOID(N, rettype, name, impl)                 \
    template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)>                          \
    void name(_WX_VARARG_JOIN(N, _WX_VARARG_ARG))                           \
    {                                                                       \
        impl(_WX_VARARG_JOIN(N, _WX_VARARG_PASS));                          \
    }

// Macro to be used with _WX_VARARG_ITER in the implementation of
// WX_DEFINE_VARARG_FUNC_NOP, i.e. empty stub for a disabled vararg function.
// The rettype and impl arguments are ignored.
#define _WX_VARARG_DEFINE_FUNC_NOP(N, rettype, name, impl)                  \
    template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)>                          \
    void name(_WX_VARARG_JOIN(N, _WX_VARARG_ARG_UNUSED)) {}


#endif // _WX_STRVARARG_H_
Commit	Line	Data
c9f78968 VS	1	///////////////////////////////////////////////////////////////////////////////
	2	// Name: wx/strvararg.h
	3	// Purpose: macros for implementing type-safe vararg passing of strings
	4	// Author: Vaclav Slavik
	5	// Created: 2007-02-19
	6	// RCS-ID: $Id$
	7	// Copyright: (c) 2007 REA Elektronik GmbH
	8	// Licence: wxWindows licence
	9	///////////////////////////////////////////////////////////////////////////////
	10
	11	#ifndef _WX_STRVARARG_H_
	12	#define _WX_STRVARARG_H_
	13
	14	#include "wx/platform.h"
	15	#if wxONLY_WATCOM_EARLIER_THAN(1,4)
	16	#error "OpenWatcom version >= 1.4 is required to compile this code"
	17	#endif
	18
e3f6cbd9	19	#include "wx/chartype.h"
c9f78968 VS	20
	21	class WXDLLIMPEXP_BASE wxCStrData;
	22	class WXDLLIMPEXP_BASE wxString;
	23	class WXDLLIMPEXP_BASE wxCharBuffer;
	24	class WXDLLIMPEXP_BASE wxWCharBuffer;
	25
	26
	27	// ----------------------------------------------------------------------------
	28	// WX_DEFINE_VARARG_FUNC* macros
	29	// ----------------------------------------------------------------------------
	30
	31	// This macro is used to implement type-safe wrappers for variadic functions
	32	// that accept strings as arguments. This makes it possible to pass char*,
	33	// wchar_t* or even wxString (as opposed to having to use wxString::c_str())
	34	// to e.g. wxPrintf().
	35	//
	36	// This is done by defining a set of N template function taking 1..N arguments
	37	// (currently, N is set to 30 in this header). These functions are just thin
	38	// wrappers around another variadic function (@a impl) and the only thing
	39	// the wrapper does is that it normalizes the arguments passed in so that
	40	// they are of the type expected by variadic functions taking string
	41	// arguments, i.e., char* or wchar_t*, depending on the build:
	42	// * char* in the current locale's charset in ANSI build
	43	// * whchar_t* in the Unicode build
	44	//
	45	// Parameters:
	46	// rettype Functions' return type.
	47	// name Name of the function.
	48	// impl Name of the variadic function that implements 'name'.
	49	#define WX_DEFINE_VARARG_FUNC(rettype, name, impl) \
	50	_WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
	51	_WX_VARARG_DEFINE_FUNC, \
	52	rettype, name, impl)
	53
	54	// Like WX_DEFINE_VARARG_FUNC, but for variadic functions that don't return
	55	// a value.
	56	#define WX_DEFINE_VARARG_FUNC_VOID(name, impl) \
	57	_WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
	58	_WX_VARARG_DEFINE_FUNC_VOID, \
	59	void, name, impl)
	60
	61	// Like WX_DEFINE_VARARG_FUNC_VOID, but instead of wrapping an implementation
	62	// function, does nothing in defined functions' bodies.
	63	//
	64	// Used to implement wxLogXXX functions if wxUSE_LOG=0.
	65	#define WX_DEFINE_VARARG_FUNC_NOP(name) \
	66	_WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
	67	_WX_VARARG_DEFINE_FUNC_NOP, \
	68	void, name, dummy)
	69
	70	// ----------------------------------------------------------------------------
	71	// implementation
	72	// ----------------------------------------------------------------------------
	73
	74	// Converts an argument passed to wxPrint etc. into standard form expected,
	75	// by wxXXX functions, e.g. all strings (wxString, char, wchar_t) are
	76	// converted into wchar_t* or char* depending on the build.
	77	template<typename T>
	78	struct wxArgNormalizer
	79	{
	80	wxArgNormalizer(const T& value) : m_value(value) {}
	81
	82	// Returns the value in a form that can be safely passed to real vararg
	83	// functions. In case of strings, this is char* in ANSI build and wchar_t*
84	// in Unicode build.
85	const T& get() const { return m_value; }
86
87	const T& m_value;
88	};
89
90	// special cases for converting strings:
91
c9f78968 VS	92	template<>
	93	struct WXDLLIMPEXP_BASE wxArgNormalizer<const wxCStrData&>
	94	{
	95	wxArgNormalizer(const wxCStrData& value) : m_value(value) {}
8f93a29f	96	const wxStringCharType *get() const;
c9f78968 VS	97
	98	const wxCStrData& m_value;
	99	};
	100
	101	template<>
	102	struct wxArgNormalizer<wxCStrData> : public wxArgNormalizer<const wxCStrData&>
	103	{
	104	wxArgNormalizer(const wxCStrData& value)
	105	: wxArgNormalizer<const wxCStrData&>(value) {}
	106	};
	107
	108	template<>
	109	struct WXDLLIMPEXP_BASE wxArgNormalizer<const wxString&>
	110	{
	111	wxArgNormalizer(const wxString& value) : m_value(value) {}
8f93a29f	112	const wxStringCharType *get() const;
c9f78968 VS	113
	114	const wxString& m_value;
	115	};
	116
	117	template<>
	118	struct wxArgNormalizer<wxString> : public wxArgNormalizer<const wxString&>
	119	{
	120	wxArgNormalizer(const wxString& value)
	121	: wxArgNormalizer<const wxString&>(value) {}
	122	};
	123
	124	#if wxUSE_UNICODE_WCHAR
	125
	126	template<>
	127	struct WXDLLIMPEXP_BASE wxArgNormalizer<const char*>
	128	{
	129	wxArgNormalizer(const char *value);
	130	~wxArgNormalizer();
	131	const wchar_t *get() const;
	132
	133	wxWCharBuffer *m_value;
	134	};
	135
	136	template<>
	137	struct wxArgNormalizer<char> : public wxArgNormalizer<const char>
	138	{
	139	wxArgNormalizer(char *value)
	140	: wxArgNormalizer<const char*>(value) {}
	141	};
	142
	143	#elif wxUSE_WCHAR_T // !wxUSE_UNICODE_WCHAR && wxUSE_WCHAR_T
	144
	145	template<>
	146	struct WXDLLIMPEXP_BASE wxArgNormalizer<const wchar_t*>
	147	{
	148	wxArgNormalizer(const wchar_t *value);
	149	~wxArgNormalizer();
	150	const char *get() const;
	151
	152	wxCharBuffer *m_value;
	153	};
	154
	155	template<>
	156	struct wxArgNormalizer<wchar_t> : public wxArgNormalizer<const wchar_t>
	157	{
	158	wxArgNormalizer(wchar_t *value)
	159	: wxArgNormalizer<const wchar_t*>(value) {}
	160	};
	161
	162	#endif // wxUSE_UNICODE_WCHAR / !wxUSE_UNICODE_WCHAR && wxUSE_WCHAR_T
	163
359bd4d1 VS	164	// versions for passing wx[W]CharBuffer:
	165	template<>
	166	struct WXDLLIMPEXP_BASE wxArgNormalizer<wxCharBuffer>
	167	: public wxArgNormalizer<const char*>
	168	{
	169	wxArgNormalizer(const wxCharBuffer& buf);
	170	};
	171
	172	template<>
	173	struct WXDLLIMPEXP_BASE wxArgNormalizer<wxWCharBuffer>
	174	: public wxArgNormalizer<const wchar_t*>
	175	{
	176	wxArgNormalizer(const wxWCharBuffer& buf);
	177	};
	178
	179
	180
c9f78968 VS	181	// NB: The vararg emulation code is limited to 30 arguments at the moment.
	182	// If you need more, you need to
	183	// 1) increase the value of _WX_VARARG_MAX_ARGS
	184	// 2) add _WX_VARARG_JOIN_* and _WX_VARARG_ITER_* up to the new
	185	// _WX_VARARG_MAX_ARGS value to the lists below
	186	#define _WX_VARARG_MAX_ARGS 30
	187
	188	#define _WX_VARARG_JOIN_1(m) m(1)
	189	#define _WX_VARARG_JOIN_2(m) _WX_VARARG_JOIN_1(m), m(2)
	190	#define _WX_VARARG_JOIN_3(m) _WX_VARARG_JOIN_2(m), m(3)
	191	#define _WX_VARARG_JOIN_4(m) _WX_VARARG_JOIN_3(m), m(4)
	192	#define _WX_VARARG_JOIN_5(m) _WX_VARARG_JOIN_4(m), m(5)
	193	#define _WX_VARARG_JOIN_6(m) _WX_VARARG_JOIN_5(m), m(6)
	194	#define _WX_VARARG_JOIN_7(m) _WX_VARARG_JOIN_6(m), m(7)
	195	#define _WX_VARARG_JOIN_8(m) _WX_VARARG_JOIN_7(m), m(8)
	196	#define _WX_VARARG_JOIN_9(m) _WX_VARARG_JOIN_8(m), m(9)
	197	#define _WX_VARARG_JOIN_10(m) _WX_VARARG_JOIN_9(m), m(10)
	198	#define _WX_VARARG_JOIN_11(m) _WX_VARARG_JOIN_10(m), m(11)
	199	#define _WX_VARARG_JOIN_12(m) _WX_VARARG_JOIN_11(m), m(12)
	200	#define _WX_VARARG_JOIN_13(m) _WX_VARARG_JOIN_12(m), m(13)
	201	#define _WX_VARARG_JOIN_14(m) _WX_VARARG_JOIN_13(m), m(14)
	202	#define _WX_VARARG_JOIN_15(m) _WX_VARARG_JOIN_14(m), m(15)
	203	#define _WX_VARARG_JOIN_16(m) _WX_VARARG_JOIN_15(m), m(16)
	204	#define _WX_VARARG_JOIN_17(m) _WX_VARARG_JOIN_16(m), m(17)
	205	#define _WX_VARARG_JOIN_18(m) _WX_VARARG_JOIN_17(m), m(18)
	206	#define _WX_VARARG_JOIN_19(m) _WX_VARARG_JOIN_18(m), m(19)
	207	#define _WX_VARARG_JOIN_20(m) _WX_VARARG_JOIN_19(m), m(20)
	208	#define _WX_VARARG_JOIN_21(m) _WX_VARARG_JOIN_20(m), m(21)
	209	#define _WX_VARARG_JOIN_22(m) _WX_VARARG_JOIN_21(m), m(22)
	210	#define _WX_VARARG_JOIN_23(m) _WX_VARARG_JOIN_22(m), m(23)
	211	#define _WX_VARARG_JOIN_24(m) _WX_VARARG_JOIN_23(m), m(24)
	212	#define _WX_VARARG_JOIN_25(m) _WX_VARARG_JOIN_24(m), m(25)
	213	#define _WX_VARARG_JOIN_26(m) _WX_VARARG_JOIN_25(m), m(26)
	214	#define _WX_VARARG_JOIN_27(m) _WX_VARARG_JOIN_26(m), m(27)
	215	#define _WX_VARARG_JOIN_28(m) _WX_VARARG_JOIN_27(m), m(28)
	216	#define _WX_VARARG_JOIN_29(m) _WX_VARARG_JOIN_28(m), m(29)
	217	#define _WX_VARARG_JOIN_30(m) _WX_VARARG_JOIN_29(m), m(30)
	218
	219	#define _WX_VARARG_ITER_1(m,a,b,c) m(1,a,b,c)
	220	#define _WX_VARARG_ITER_2(m,a,b,c) _WX_VARARG_ITER_1(m,a,b,c) m(2,a,b,c)
	221	#define _WX_VARARG_ITER_3(m,a,b,c) _WX_VARARG_ITER_2(m,a,b,c) m(3,a,b,c)
	222	#define _WX_VARARG_ITER_4(m,a,b,c) _WX_VARARG_ITER_3(m,a,b,c) m(4,a,b,c)
	223	#define _WX_VARARG_ITER_5(m,a,b,c) _WX_VARARG_ITER_4(m,a,b,c) m(5,a,b,c)
	224	#define _WX_VARARG_ITER_6(m,a,b,c) _WX_VARARG_ITER_5(m,a,b,c) m(6,a,b,c)
	225	#define _WX_VARARG_ITER_7(m,a,b,c) _WX_VARARG_ITER_6(m,a,b,c) m(7,a,b,c)
	226	#define _WX_VARARG_ITER_8(m,a,b,c) _WX_VARARG_ITER_7(m,a,b,c) m(8,a,b,c)
	227	#define _WX_VARARG_ITER_9(m,a,b,c) _WX_VARARG_ITER_8(m,a,b,c) m(9,a,b,c)
	228	#define _WX_VARARG_ITER_10(m,a,b,c) _WX_VARARG_ITER_9(m,a,b,c) m(10,a,b,c)
	229	#define _WX_VARARG_ITER_11(m,a,b,c) _WX_VARARG_ITER_10(m,a,b,c) m(11,a,b,c)
	230	#define _WX_VARARG_ITER_12(m,a,b,c) _WX_VARARG_ITER_11(m,a,b,c) m(12,a,b,c)
	231	#define _WX_VARARG_ITER_13(m,a,b,c) _WX_VARARG_ITER_12(m,a,b,c) m(13,a,b,c)
	232	#define _WX_VARARG_ITER_14(m,a,b,c) _WX_VARARG_ITER_13(m,a,b,c) m(14,a,b,c)
	233	#define _WX_VARARG_ITER_15(m,a,b,c) _WX_VARARG_ITER_14(m,a,b,c) m(15,a,b,c)
	234	#define _WX_VARARG_ITER_16(m,a,b,c) _WX_VARARG_ITER_15(m,a,b,c) m(16,a,b,c)
	235	#define _WX_VARARG_ITER_17(m,a,b,c) _WX_VARARG_ITER_16(m,a,b,c) m(17,a,b,c)
	236	#define _WX_VARARG_ITER_18(m,a,b,c) _WX_VARARG_ITER_17(m,a,b,c) m(18,a,b,c)
	237	#define _WX_VARARG_ITER_19(m,a,b,c) _WX_VARARG_ITER_18(m,a,b,c) m(19,a,b,c)
	238	#define _WX_VARARG_ITER_20(m,a,b,c) _WX_VARARG_ITER_19(m,a,b,c) m(20,a,b,c)
	239	#define _WX_VARARG_ITER_21(m,a,b,c) _WX_VARARG_ITER_20(m,a,b,c) m(21,a,b,c)
	240	#define _WX_VARARG_ITER_22(m,a,b,c) _WX_VARARG_ITER_21(m,a,b,c) m(22,a,b,c)
	241	#define _WX_VARARG_ITER_23(m,a,b,c) _WX_VARARG_ITER_22(m,a,b,c) m(23,a,b,c)
	242	#define _WX_VARARG_ITER_24(m,a,b,c) _WX_VARARG_ITER_23(m,a,b,c) m(24,a,b,c)
	243	#define _WX_VARARG_ITER_25(m,a,b,c) _WX_VARARG_ITER_24(m,a,b,c) m(25,a,b,c)
	244	#define _WX_VARARG_ITER_26(m,a,b,c) _WX_VARARG_ITER_25(m,a,b,c) m(26,a,b,c)
245	#define _WX_VARARG_ITER_27(m,a,b,c) _WX_VARARG_ITER_26(m,a,b,c) m(27,a,b,c)
246	#define _WX_VARARG_ITER_28(m,a,b,c) _WX_VARARG_ITER_27(m,a,b,c) m(28,a,b,c)
247	#define _WX_VARARG_ITER_29(m,a,b,c) _WX_VARARG_ITER_28(m,a,b,c) m(29,a,b,c)
248	#define _WX_VARARG_ITER_30(m,a,b,c) _WX_VARARG_ITER_29(m,a,b,c) m(30,a,b,c)
249
250	// This macro calls another macro 'm' passed as second argument 'N' times,
251	// with its only argument set to 1..N, and concatenates the results using
252	// comma as separator.
253	//
254	// An example:
255	// #define foo(i) x##i
256	// // this expands to "x1,x2,x3,x4"
257	// _WX_VARARG_JOIN(4, foo)
258	//
259	//
260	// N must not be greater than _WX_VARARG_MAX_ARGS (=30).
261	#define _WX_VARARG_JOIN(N, m) _WX_VARARG_JOIN_IMPL(N, m)
262	#define _WX_VARARG_JOIN_IMPL(N, m) _WX_VARARG_JOIN_##N(m)
263
264	// This macro calls another macro 'm' passed as second argument 'N' times, with
265	// its first argument set to 1..N and the remaining arguments set to 'a', 'b'
266	// and 'c'. The results are separated with whitespace in the expansion.
267	//
268	// An example:
269	// // this macro expands to:
270	// // foo(1,a,b,c)
271	// // foo(2,a,b,c)
272	// // foo(3,a,b,c)
273	// _WX_VARARG_ITER(3, foo, a, b, c)
274	//
275	// N must not be greater than _WX_VARARG_MAX_ARGS (=30).
276	#define _WX_VARARG_ITER(N, m,a,b,c) _WX_VARARG_ITER_IMPL(N, m, a, b, c)
277	#define _WX_VARARG_ITER_IMPL(N, m,a,b,c) _WX_VARARG_ITER_##N(m, a, b, c)
278
279	// Generates code snippet for i-th argument in vararg function's prototype.
280	#define _WX_VARARG_ARG(i) T##i a##i
281
282	// Like _WX_VARARG_ARG_UNUSED, but outputs argument's type with WXUNUSED.
283	#define _WX_VARARG_ARG_UNUSED(i) T##i WXUNUSED(a##i)
284
285	// Generates code snippet for i-th type in vararg function's template<...>.
286	#define _WX_VARARG_TEMPL(i) typename T##i
287
288	// Generates code snippet for passing i-th argument of vararg function
289	// wrapper to its implementation, normalizing it in the process
290	#define _WX_VARARG_PASS(i) wxArgNormalizer<T##i>(a##i).get()
291
292
293	// Macro to be used with _WX_VARARG_ITER in the implementation of
294	// WX_DEFINE_VARARG_FUNC (see its documentation for the meaning of arguments)
295	#define _WX_VARARG_DEFINE_FUNC(N, rettype, name, impl) \
296	template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
297	rettype name(_WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
298	{ \
299	return impl(_WX_VARARG_JOIN(N, _WX_VARARG_PASS)); \
300	}
301
302	// Macro to be used with _WX_VARARG_ITER in the implementation of
303	// WX_DEFINE_VARARG_FUNC_VOID (see its documentation for the meaning of
304	// arguments; rettype is ignored and is used only to satisfy _WX_VARARG_ITER's
305	// requirements).
306	#define _WX_VARARG_DEFINE_FUNC_VOID(N, rettype, name, impl) \
307	template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
308	void name(_WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
309	{ \
310	impl(_WX_VARARG_JOIN(N, _WX_VARARG_PASS)); \
311	}
312
313	// Macro to be used with _WX_VARARG_ITER in the implementation of
314	// WX_DEFINE_VARARG_FUNC_NOP, i.e. empty stub for a disabled vararg function.
315	// The rettype and impl arguments are ignored.
316	#define _WX_VARARG_DEFINE_FUNC_NOP(N, rettype, name, impl) \
317	template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
318	void name(_WX_VARARG_JOIN(N, _WX_VARARG_ARG_UNUSED)) {}
319
320
321	#endif // _WX_STRVARARG_H_