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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: chartype.h | |
3 | // Purpose: interface of global functions | |
4 | // Author: wxWidgets team | |
5 | // RCS-ID: $Id$ | |
6 | // Licence: wxWindows license | |
7 | ///////////////////////////////////////////////////////////////////////////// | |
8 | ||
9 | /** @addtogroup group_funcmacro_string */ | |
10 | //@{ | |
11 | ||
12 | /** | |
13 | This macro can be used with character and string literals (in other words, | |
14 | @c 'x' or @c "foo") to automatically convert them to wide strings in Unicode | |
15 | builds of wxWidgets. This macro simply returns the value passed to it | |
16 | without changes in ASCII build. In fact, its definition is: | |
17 | ||
18 | @code | |
19 | #ifdef UNICODE | |
20 | # define wxT(x) L##x | |
21 | #else // !Unicode | |
22 | # define wxT(x) x | |
23 | #endif | |
24 | @endcode | |
25 | ||
26 | Note that since wxWidgets 2.9.0 you shouldn't use wxT() anymore in your | |
27 | program sources (it was previously required if you wanted to support Unicode). | |
28 | ||
29 | @see @ref overview_unicode, wxS() | |
30 | ||
31 | @header{wx/chartype.h} | |
32 | */ | |
33 | #define wxT(string) | |
34 | ||
35 | /** | |
36 | wxS is macro which can be used with character and string literals (in other words, | |
37 | @c 'x' or @c "foo") to either convert them to wide characters or wide strings | |
38 | in @c wchar_t-based (UTF-16) builds or keep them unchanged in @c char-based | |
39 | (UTF-8) builds. | |
40 | ||
41 | Basically this macro produces characters or strings of type wxStringCharType. | |
42 | ||
43 | The use of this macro is optional as the translation will always be done at | |
44 | run-time even if there is a mismatch between the kind of the literal used | |
45 | and the string or character type used in the current build. | |
46 | However using it can be beneficial in <b>performance-sensitive code</b> to | |
47 | do the conversion at compile-time instead. | |
48 | ||
49 | @see @ref overview_unicode, wxT() | |
50 | ||
51 | @header{wx/chartype.h} | |
52 | */ | |
53 | #define wxS(string) | |
54 | ||
55 | /** | |
56 | This macro is exactly the same as wxT() and is defined in wxWidgets simply | |
57 | because it may be more intuitive for Windows programmers as the standard | |
58 | Win32 headers also define it (as well as yet another name for the same | |
59 | macro which is _TEXT()). | |
60 | ||
61 | Don't confuse this macro with _()! | |
62 | ||
63 | Note that since wxWidgets 2.9.0 the use of _T() is discouraged just like | |
64 | for wxT() and also that this macro may conflict with identifiers defined in | |
65 | standard headers of some compilers (such as Sun CC) so its use should | |
66 | really be avoided. | |
67 | ||
68 | @header{wx/chartype.h} | |
69 | */ | |
70 | #define _T(string) | |
71 | ||
72 | /** | |
73 | wxChar is defined to be | |
74 | - @c char when <tt>wxUSE_UNICODE==0</tt> | |
75 | - @c wchar_t when <tt>wxUSE_UNICODE==1</tt> (the default). | |
76 | */ | |
77 | typedef wxUSE_UNICODE_dependent wxChar; | |
78 | ||
79 | /** | |
80 | wxSChar is defined to be | |
81 | - <tt>signed char</tt> when <tt>wxUSE_UNICODE==0</tt> | |
82 | - @c wchar_t when <tt>wxUSE_UNICODE==1</tt> (the default). | |
83 | */ | |
84 | typedef wxUSE_UNICODE_dependent wxSChar; | |
85 | ||
86 | /** | |
87 | wxUChar is defined to be | |
88 | - <tt>unsigned char</tt> when <tt>wxUSE_UNICODE==0</tt> | |
89 | - @c wchar_t when <tt>wxUSE_UNICODE==1</tt> (the default). | |
90 | */ | |
91 | typedef wxUSE_UNICODE_dependent wxUChar; | |
92 | ||
93 | /** | |
94 | wxStringCharType is defined to be: | |
95 | - @c char when <tt>wxUSE_UNICODE==0</tt> | |
96 | - @c char when <tt>wxUSE_UNICODE_WCHAR==0</tt> and <tt>wxUSE_UNICODE==1</tt> | |
97 | - @c wchar_t when <tt>wxUSE_UNICODE_WCHAR==1</tt> and <tt>wxUSE_UNICODE==1</tt> | |
98 | ||
99 | The @c wxUSE_UNICODE_WCHAR symbol is defined to @c 1 when building on | |
100 | Windows while it's defined to @c 0 when building on Unix, Linux or OS X. | |
101 | (Note that @c wxUSE_UNICODE_UTF8 symbol is defined as the opposite of | |
102 | @c wxUSE_UNICODE_WCHAR.) | |
103 | ||
104 | Note that wxStringCharType (as the name says) is the type used by wxString | |
105 | for internal storage of the characters. | |
106 | */ | |
107 | typedef wxUSE_UNICODE_WCHAR_dependent wxStringCharType; | |
108 | ||
109 | //@} |