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Make the warning "statement has no effect" switchable.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@4823 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz 2010-10-02 19:32:11 +00:00
parent d1f5b74f01
commit e048d2aeba
5 changed files with 25 additions and 16 deletions
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2
doc/cc65.sgml
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@ -471,6 +471,8 @@ Here is a description of all the command line options:
<descrip> <descrip>
<tag><tt/error/</tag> <tag><tt/error/</tag>
Treat all warnings as errors. Treat all warnings as errors.
<tag><tt/no-effect/</tag>
Warn about statements that don't have an effect.
<tag><tt/unknown-pragma/</tag> <tag><tt/unknown-pragma/</tag>
Warn about known #pragmas. Warn about known #pragmas.
<tag><tt/unused-label/</tag> <tag><tt/unused-label/</tag>

15
src/cc65/error.c
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@ -6,7 +6,7 @@
/* */ /* */
/* */ /* */
/* */ /* */
/* (C) 1998-2009, Ullrich von Bassewitz */ /* (C) 1998-2010, Ullrich von Bassewitz */
/* Roemerstrasse 52 */ /* Roemerstrasse 52 */
/* D-70794 Filderstadt */ /* D-70794 Filderstadt */
/* EMail: uz@cc65.org */ /* EMail: uz@cc65.org */
@ -63,11 +63,13 @@ unsigned WarningCount = 0;
/* Warning and error options */ /* Warning and error options */
IntStack WarnEnable = INTSTACK(1); /* Enable warnings */ IntStack WarnEnable = INTSTACK(1); /* Enable warnings */
IntStack WarningsAreErrors = INTSTACK(0); /* Treat warnings as errors */ IntStack WarningsAreErrors = INTSTACK(0); /* Treat warnings as errors */
IntStack WarnStructParam = INTSTACK(1); /* Warn about structs passed by val */ /* Warn about: */
IntStack WarnUnusedLabel = INTSTACK(1); /* Warn about unused labels */ IntStack WarnNoEffect = INTSTACK(1); /* ... statements without an effect */
IntStack WarnUnusedParam = INTSTACK(1); /* Warn about unused parameters */ IntStack WarnStructParam = INTSTACK(1); /* ... structs passed by val */
IntStack WarnUnusedVar = INTSTACK(1); /* Warn about unused variables */ IntStack WarnUnusedLabel = INTSTACK(1); /* ... unused labels */
IntStack WarnUnknownPragma = INTSTACK(1); /* Warn about unknown #pragmas */ IntStack WarnUnusedParam = INTSTACK(1); /* ... unused parameters */
IntStack WarnUnusedVar = INTSTACK(1); /* ... unused variables */
IntStack WarnUnknownPragma = INTSTACK(1); /* ... unknown #pragmas */
/* Map the name of a warning to the intstack that holds its state */ /* Map the name of a warning to the intstack that holds its state */
typedef struct WarnMapEntry WarnMapEntry; typedef struct WarnMapEntry WarnMapEntry;
@ -78,6 +80,7 @@ struct WarnMapEntry {
static WarnMapEntry WarnMap[] = { static WarnMapEntry WarnMap[] = {
/* Keep sorted, even if this isn't used for now */ /* Keep sorted, even if this isn't used for now */
{ &WarningsAreErrors, "error" }, { &WarningsAreErrors, "error" },
{ &WarnNoEffect, "no-effect" },
{ &WarnStructParam, "struct-param" }, { &WarnStructParam, "struct-param" },
{ &WarnUnknownPragma, "unknown-pragma" }, { &WarnUnknownPragma, "unknown-pragma" },
{ &WarnUnusedLabel, "unused-label" }, { &WarnUnusedLabel, "unused-label" },

14
src/cc65/error.h
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@ -6,7 +6,7 @@
/* */ /* */
/* */ /* */
/* */ /* */
/* (C) 1998-2009, Ullrich von Bassewitz */ /* (C) 1998-2010, Ullrich von Bassewitz */
/* Roemerstrasse 52 */ /* Roemerstrasse 52 */
/* D-70794 Filderstadt */ /* D-70794 Filderstadt */
/* EMail: uz@cc65.org */ /* EMail: uz@cc65.org */
@ -60,11 +60,13 @@ extern unsigned WarningCount;
/* Warning and error options */ /* Warning and error options */
extern IntStack WarnEnable; /* Enable warnings */ extern IntStack WarnEnable; /* Enable warnings */
extern IntStack WarningsAreErrors; /* Treat warnings as errors */ extern IntStack WarningsAreErrors; /* Treat warnings as errors */
extern IntStack WarnStructParam; /* Warn about structs passed by val */ /* Warn about: */
extern IntStack WarnUnusedLabel; /* Warn about unused labels */ extern IntStack WarnNoEffect; /* ... statements without an effect */
extern IntStack WarnUnusedParam; /* Warn about unused parameters */ extern IntStack WarnStructParam; /* ... structs passed by val */
extern IntStack WarnUnusedVar; /* Warn about unused variables */ extern IntStack WarnUnusedLabel; /* ... unused labels */
extern IntStack WarnUnknownPragma; /* Warn about unknown #pragmas */ extern IntStack WarnUnusedParam; /* ... unused parameters */
extern IntStack WarnUnusedVar; /* ... unused variables */
extern IntStack WarnUnknownPragma; /* ... unknown #pragmas */

4
src/cc65/pragma.c
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@ -238,7 +238,7 @@ static IntStack* GetWarning (StrBuf* B)
/* Done */ /* Done */
return S; return S;
} }
@ -490,7 +490,7 @@ static void WarnPragma (StrBuf* B)
int Push; int Push;
/* A warning name must follow */ /* A warning name must follow */
IntStack* S =GetWarning (B); IntStack* S = GetWarning (B);
if (S == 0) { if (S == 0) {
return; return;
} }

6
src/cc65/stmt.c
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@ -6,7 +6,7 @@
/* */ /* */
/* */ /* */
/* */ /* */
/* (C) 1998-2009, Ullrich von Bassewitz */ /* (C) 1998-2010, Ullrich von Bassewitz */
/* Roemerstrasse 52 */ /* Roemerstrasse 52 */
/* D-70794 Filderstadt */ /* D-70794 Filderstadt */
/* EMail: uz@cc65.org */ /* EMail: uz@cc65.org */
@ -653,7 +653,9 @@ int Statement (int* PendingToken)
* void, emit a warning. * void, emit a warning.
*/ */
GetCodePos (&End); GetCodePos (&End);
if (CodeRangeIsEmpty (&Start, &End) && !IsTypeVoid (Expr.Type)) { if (CodeRangeIsEmpty (&Start, &End) &&
!IsTypeVoid (Expr.Type) &&
IS_Get (&WarnNoEffect)) {
Warning ("Statement has no effect"); Warning ("Statement has no effect");
} }
CheckSemi (PendingToken); CheckSemi (PendingToken);