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PP: More clearly distinguish funtion-like and object-like macros

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This commit is contained in:
John Kessenich 2018-11-07 17:14:46 -07:00
parent 0a339ec20c
commit 4ee2f75294
4 changed files with 17 additions and 15 deletions
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6
Test/baseResults/cppSimple.vert.out
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@ -35,9 +35,9 @@ ERROR: 0:155: '#else' : unexpected tokens following directive
ERROR: 0:158: '#else' : #else after #else
ERROR: 0:160: '#endif' : unexpected tokens following directive
ERROR: 0:164: '#define' : duplicate macro parameter
ERROR: 0:173: '#define' : Macro redefined; different number of arguments: m4
ERROR: 0:178: '#define' : Macro redefined; different number of arguments: m5
ERROR: 0:182: '#define' : Macro redefined; different number of arguments: m6
ERROR: 0:173: '#define' : Macro redefined; function-like versus object-like: m4
ERROR: 0:177: '#define' : Macro redefined; function-like versus object-like: m5
ERROR: 0:181: '#define' : Macro redefined; different number of arguments: m6
ERROR: 0:185: '#define' : Macro redefined; different substitutions: m7
ERROR: 0:192: '#define' : Macro redefined; different substitutions: m8
ERROR: 0:196: '#define' : Macro redefined; different argument names: m9

4
Test/cppSimple.vert Normal file → Executable file
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@ -170,7 +170,7 @@ int a = length("aoenatuh"); // ERROR
// ERROR
#define m4(b)
#define m4 (b)
#define m4
// ERROR
#define m5 (b)
@ -178,7 +178,7 @@ int a = length("aoenatuh"); // ERROR
// ERROR
#define m6(a)
#define m6
#define m6(a,b)
// ERROR (whitespace)
#define m7 (a)

14
glslang/MachineIndependent/preprocessor/Pp.cpp
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@ -109,11 +109,12 @@ int TPpContext::CPPdefine(TPpToken* ppToken)
// save the macro name
const int defAtom = atomStrings.getAddAtom(ppToken->name);
TSourceLoc defineLoc = ppToken->loc; // because ppToken might go to the next line before we report errors
// gather parameters to the macro, between (...)
token = scanToken(ppToken);
if (token == '(' && ! ppToken->space) {
mac.emptyArgs = 1;
if (token == '(' && !ppToken->space) {
mac.functionLike = 1;
do {
token = scanToken(ppToken);
if (mac.args.size() == 0 && token == ')')
@ -123,7 +124,6 @@ int TPpContext::CPPdefine(TPpToken* ppToken)
return token;
}
mac.emptyArgs = 0;
const int argAtom = atomStrings.getAddAtom(ppToken->name);
// check for duplication of parameter name
@ -149,7 +149,6 @@ int TPpContext::CPPdefine(TPpToken* ppToken)
}
// record the definition of the macro
TSourceLoc defineLoc = ppToken->loc; // because ppToken is going to go to the next line before we report errors
while (token != '\n' && token != EndOfInput) {
mac.body.putToken(token, ppToken);
token = scanToken(ppToken);
@ -164,7 +163,9 @@ int TPpContext::CPPdefine(TPpToken* ppToken)
// Already defined -- need to make sure they are identical:
// "Two replacement lists are identical if and only if the preprocessing tokens in both have the same number,
// ordering, spelling, and white-space separation, where all white-space separations are considered identical."
if (existing->args.size() != mac.args.size() || existing->emptyArgs != mac.emptyArgs)
if (existing->functionLike != mac.functionLike)
parseContext.ppError(defineLoc, "Macro redefined; function-like versus object-like:", "#define", atomStrings.getString(defAtom));
else if (existing->args.size() != mac.args.size())
parseContext.ppError(defineLoc, "Macro redefined; different number of arguments:", "#define", atomStrings.getString(defAtom));
else {
if (existing->args != mac.args)
@ -1190,13 +1191,14 @@ MacroExpandResult TPpContext::MacroExpand(TPpToken* ppToken, bool expandUndef, b
TSourceLoc loc = ppToken->loc; // in case we go to the next line before discovering the error
in->mac = macro;
if (macro->args.size() > 0 || macro->emptyArgs) {
if (macro->functionLike) {
int token = scanToken(ppToken);
if (newLineOkay) {
while (token == '\n')
token = scanToken(ppToken);
}
if (token != '(') {
// function-like macro called with object-like syntax: okay, don't expand
UngetToken(token, ppToken);
delete in;
return MacroExpandNotStarted;

8
glslang/MachineIndependent/preprocessor/PpContext.h
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@ -267,12 +267,12 @@ public:
//
struct MacroSymbol {
MacroSymbol() : emptyArgs(0), busy(0), undef(0) { }
MacroSymbol() : functionLike(0), busy(0), undef(0) { }
TVector<int> args;
TokenStream body;
unsigned emptyArgs : 1;
unsigned busy : 1;
unsigned undef : 1;
unsigned functionLike : 1; // 0 means object-like, 1 means function-like
unsigned busy : 1;
unsigned undef : 1;
};
typedef TMap<int, MacroSymbol> TSymbolMap;