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C++ style comments in C89 mode will cause errors only once per input file.

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This commit is contained in:
acqn 2022-09-29 19:47:31 +08:00
parent 29c9cb3e00
commit 715aa919e6
3 changed files with 8 additions and 1 deletions
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1
src/cc65/global.c
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@ -49,6 +49,7 @@ unsigned char DebugInfo = 0; /* Add debug info to the obj */
unsigned char PreprocessOnly = 0; /* Just preprocess the input */ unsigned char PreprocessOnly = 0; /* Just preprocess the input */
unsigned char DebugOptOutput = 0; /* Output debug stuff */ unsigned char DebugOptOutput = 0; /* Output debug stuff */
unsigned RegisterSpace = 6; /* Space available for register vars */ unsigned RegisterSpace = 6; /* Space available for register vars */
unsigned AllowNewComments = 0; /* Allow new style comments in C89 mode */
/* Stackable options */ /* Stackable options */
IntStack WritableStrings = INTSTACK(0); /* Literal strings are r/w */ IntStack WritableStrings = INTSTACK(0); /* Literal strings are r/w */

1
src/cc65/global.h
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@ -57,6 +57,7 @@ extern unsigned char DebugInfo; /* Add debug info to the obj */
extern unsigned char PreprocessOnly; /* Just preprocess the input */ extern unsigned char PreprocessOnly; /* Just preprocess the input */
extern unsigned char DebugOptOutput; /* Output debug stuff */ extern unsigned char DebugOptOutput; /* Output debug stuff */
extern unsigned RegisterSpace; /* Space available for register vars */ extern unsigned RegisterSpace; /* Space available for register vars */
extern unsigned AllowNewComments; /* Allow new style comments in C89 mode */
/* Stackable options */ /* Stackable options */
extern IntStack WritableStrings; /* Literal strings are r/w */ extern IntStack WritableStrings; /* Literal strings are r/w */

7
src/cc65/preproc.c
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@ -402,8 +402,10 @@ static void NewStyleComment (void)
/* Remove a new style C comment from line. */ /* Remove a new style C comment from line. */
{ {
/* Diagnose if this is unsupported */ /* Diagnose if this is unsupported */
if (IS_Get (&Standard) < STD_C99) { if (IS_Get (&Standard) < STD_C99 && !AllowNewComments) {
PPError ("C++ style comments are not allowed in C89"); PPError ("C++ style comments are not allowed in C89");
PPNote ("(this will be reported only once per input file)");
AllowNewComments = 1;
} }
/* Beware: Because line continuation chars are handled when reading /* Beware: Because line continuation chars are handled when reading
@ -1800,6 +1802,9 @@ void PreprocessBegin (void)
/* Remember to update source file location in preprocess-only mode */ /* Remember to update source file location in preprocess-only mode */
FileChanged = 1; FileChanged = 1;
/* Enable diagnostics on new style comments in C89 mode */
AllowNewComments = 0;
} }