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C++ style comments in C89 mode will cause errors only once per input file.
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@ -49,6 +49,7 @@ unsigned char DebugInfo = 0; /* Add debug info to the obj */
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unsigned char PreprocessOnly = 0; /* Just preprocess the input */
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unsigned char DebugOptOutput = 0; /* Output debug stuff */
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unsigned RegisterSpace = 6; /* Space available for register vars */
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unsigned AllowNewComments = 0; /* Allow new style comments in C89 mode */
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/* Stackable options */
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IntStack WritableStrings = INTSTACK(0); /* Literal strings are r/w */
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@ -57,6 +57,7 @@ extern unsigned char DebugInfo; /* Add debug info to the obj */
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extern unsigned char PreprocessOnly; /* Just preprocess the input */
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extern unsigned char DebugOptOutput; /* Output debug stuff */
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extern unsigned RegisterSpace; /* Space available for register vars */
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extern unsigned AllowNewComments; /* Allow new style comments in C89 mode */
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/* Stackable options */
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extern IntStack WritableStrings; /* Literal strings are r/w */
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@ -402,8 +402,10 @@ static void NewStyleComment (void)
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/* Remove a new style C comment from line. */
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{
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/* Diagnose if this is unsupported */
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if (IS_Get (&Standard) < STD_C99) {
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if (IS_Get (&Standard) < STD_C99 && !AllowNewComments) {
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PPError ("C++ style comments are not allowed in C89");
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PPNote ("(this will be reported only once per input file)");
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AllowNewComments = 1;
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}
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/* Beware: Because line continuation chars are handled when reading
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@ -1800,6 +1802,9 @@ void PreprocessBegin (void)
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/* Remember to update source file location in preprocess-only mode */
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FileChanged = 1;
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/* Enable diagnostics on new style comments in C89 mode */
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AllowNewComments = 0;
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}
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