Are `typedef` synonyms interchangeable in C?

Question

The ad qboolean SNDDMA_InitDirect (void);appears in 'WinQuake / snd_win.c' on line 69 . However, the function definition (appearing on line 183 of the same file is written as:

sndinitstat SNDDMA_InitDirect (void)
{
    /* Actual implementation is unimportant in this discussion. */
}

Both qbooleanand sndinitstatare typedefenumerations: sndinitstaton line 33 of 'WinQuake / snd_win.c' ,

typedef enum {SIS_SUCCESS, SIS_FAILURE, SIS_NOTAVAIL} sndinitstat;

and qbooleanin 'WinQuake / common.h' (line 30)

typedef enum {false, true} qboolean;

These are various listings .

Visual Studio 2015, - cl.exe - Clang v3.7.1 LLVM Visual Studio. , / . Visual Studio . ?

, C: A Reference Manual ( ):

• 5.5 (. 127)

  int.

• 5.10 (. 149)

  typedef ; , .

, , , . , Microsoft C.

Answer 1

, typedef qboolean sndinitstat, , . , . (. 6.2.7 ).

, , .

typedef . , . , , , . Visual Studio .

, Clang ( GCC) - , . ,

enum { A1, A2, A3 } foo();
enum { B1, B2, B3 } foo();

Clang GCC, . , , foo .

Answer 2

:

typedef enum {false, true}  qboolean;
typedef enum {SIS_SUCCESS, SIS_FAILURE, SIS_NOTAVAIL} sndinitstat;

6.2.5: 16,

.

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