mirror of https://github.com/ZDoom/qzdoom.git
Add non-action function parsing to the DECORATE parser
This commit is contained in:
Randy Heit
parent
10a2c0f58a
commit
9e3ed70021
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@ -277,22 +277,184 @@ static void ParseEnum (FScanner &sc, PSymbolTable *symt, PClassActor *cls)
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sc.MustGetToken(';');
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}
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//==========================================================================
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//
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// ParseArgListDef
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//
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// Parses the argument list from a function declaration.
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//
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//==========================================================================
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static void ParseArgListDef(FScanner &sc, PClassActor *cls,
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TArray<PType *> &args, TArray<DWORD> &argflags)
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{
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if (!sc.CheckToken(')'))
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{
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while (sc.TokenType != ')')
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{
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int flags = 0;
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PType *type = NULL;
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PClass *restrict = NULL;
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// Retrieve flags before type name
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for (;;)
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{
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if (sc.CheckToken(TK_Coerce) || sc.CheckToken(TK_Native))
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{
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}
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else
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{
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break;
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}
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}
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// Read the variable type
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sc.MustGetAnyToken();
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switch (sc.TokenType)
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{
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case TK_Bool:
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case TK_Int:
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type = TypeSInt32;
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break;
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case TK_Float:
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type = TypeFloat64;
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break;
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case TK_Sound: type = TypeSound; break;
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case TK_String: type = TypeString; break;
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case TK_Name: type = TypeName; break;
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case TK_State: type = TypeState; break;
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case TK_Color: type = TypeColor; break;
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case TK_Class:
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sc.MustGetToken('<');
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sc.MustGetToken(TK_Identifier); // Get class name
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restrict = PClass::FindClass(sc.String);
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if (restrict == NULL)
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{
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sc.ScriptMessage("Unknown class type %s", sc.String);
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FScriptPosition::ErrorCounter++;
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}
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else
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{
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type = NewClassPointer(restrict);
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}
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sc.MustGetToken('>');
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break;
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case TK_Ellipsis:
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// Making the final type NULL signals a varargs function.
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type = NULL;
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sc.MustGetToken(')');
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sc.UnGet();
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break;
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default:
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sc.ScriptMessage ("Unknown variable type %s", sc.TokenName(sc.TokenType, sc.String).GetChars());
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type = TypeSInt32;
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FScriptPosition::ErrorCounter++;
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break;
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}
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// Read the optional variable name
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if (!sc.CheckToken(',') && !sc.CheckToken(')'))
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{
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sc.MustGetToken(TK_Identifier);
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}
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else
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{
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sc.UnGet();
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}
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if (sc.CheckToken('='))
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{
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flags |= VARF_Optional;
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FxExpression *def = ParseParameter(sc, cls, type, true);
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delete def;
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}
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args.Push(type);
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argflags.Push(flags);
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sc.MustGetAnyToken();
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if (sc.TokenType != ',' && sc.TokenType != ')')
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{
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sc.ScriptError ("Expected ',' or ')' but got %s instead", sc.TokenName(sc.TokenType, sc.String).GetChars());
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}
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}
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}
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sc.MustGetToken(';');
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}
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//==========================================================================
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//
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// ParseFunctionDef
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//
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// Parses a native function's parameters and adds it to the class,
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// if possible.
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//
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//==========================================================================
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void ParseFunctionDef(FScanner &sc, PClassActor *cls, FName funcname,
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TArray<PType *> &rets, DWORD funcflags, unsigned int error)
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{
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assert(cls != NULL);
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const AFuncDesc *afd;
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TArray<PType *> args;
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TArray<DWORD> argflags;
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afd = FindFunction(funcname);
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if (afd == NULL)
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{
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sc.ScriptMessage ("The function '%s' has not been exported from the executable.", funcname.GetChars());
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++error;
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}
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sc.MustGetToken('(');
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if (funcflags & VARF_Method)
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{
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args.Push(NewClassPointer(cls)), argflags.Push(0); // implied self pointer
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}
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if (funcflags & VARF_Action)
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{
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args.Push(NewClassPointer(RUNTIME_CLASS(AActor))), argflags.Push(0); // implied stateowner pointer
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args.Push(TypeState), argflags.Push(0); // implied callingstate pointer
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}
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ParseArgListDef(sc, cls, args, argflags);
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if (afd != NULL)
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{
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PFunction *sym = new PFunction(funcname);
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sym->AddVariant(NewPrototype(rets, args), argflags, *(afd->VMPointer));
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sym->Flags = funcflags;
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if (error)
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{
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FScriptPosition::ErrorCounter += error;
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}
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else if (cls->Symbols.AddSymbol(sym) == NULL)
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{
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delete sym;
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sc.ScriptMessage ("'%s' is already defined in class '%s'.",
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funcname.GetChars(), cls->TypeName.GetChars());
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FScriptPosition::ErrorCounter++;
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}
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}
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}
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//==========================================================================
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//
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// ParseNativeVariable
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//
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// Parses a native variable declaration.
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// Parses a native variable or non-action function declaration.
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//
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//==========================================================================
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static void ParseNativeVariable (FScanner &sc, PSymbolTable *symt, PClassActor *cls)
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{
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PType *valuetype;
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unsigned int error = 0;
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if (sc.LumpNum == -1 || Wads.GetLumpFile(sc.LumpNum) > 0)
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{
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sc.ScriptMessage ("variables can only be imported by internal class and actor definitions!");
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FScriptPosition::ErrorCounter++;
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error++;
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}
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// Read the type and make sure it's int or float.
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@ -300,6 +462,7 @@ static void ParseNativeVariable (FScanner &sc, PSymbolTable *symt, PClassActor *
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switch (sc.TokenType)
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{
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case TK_Int:
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case TK_Bool:
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valuetype = TypeSInt32;
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break;
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@ -328,6 +491,17 @@ static void ParseNativeVariable (FScanner &sc, PSymbolTable *symt, PClassActor *
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sc.MustGetToken(TK_Identifier);
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FName symname = sc.String;
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if (sc.CheckToken('('))
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{
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TArray<PType *> rets;
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rets.Push(valuetype);
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sc.UnGet();
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ParseFunctionDef(sc, cls, symname, rets, VARF_Method, error);
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return;
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}
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else
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{
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if (sc.CheckToken('['))
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{
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FxExpression *expr = ParseExpression (sc, cls);
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@ -362,6 +536,7 @@ static void ParseNativeVariable (FScanner &sc, PSymbolTable *symt, PClassActor *
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{
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cls->Fields.Push(sym);
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}
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}
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}
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//==========================================================================
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@ -908,11 +1083,8 @@ static void ParseActorProperty(FScanner &sc, Baggage &bag)
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static void ParseActionDef (FScanner &sc, PClassActor *cls)
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{
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unsigned int error = 0;
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const AFuncDesc *afd;
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FName funcname;
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TArray<PType *> rets;
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TArray<PType *> args;
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TArray<DWORD> argflags;
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if (sc.LumpNum == -1 || Wads.GetLumpFile(sc.LumpNum) > 0)
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{
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@ -928,125 +1100,7 @@ static void ParseActionDef (FScanner &sc, PClassActor *cls)
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}
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sc.MustGetToken(TK_Identifier);
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funcname = sc.String;
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afd = FindFunction(sc.String);
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if (afd == NULL)
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{
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sc.ScriptMessage ("The function '%s' has not been exported from the executable.", sc.String);
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++error;
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}
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args.Push(NewClassPointer(cls)), argflags.Push(0); // implied self pointer
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args.Push(NewClassPointer(RUNTIME_CLASS(AActor))), argflags.Push(0); // implied stateowner pointer
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args.Push(TypeState), argflags.Push(0); // implied callingstate pointer
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sc.MustGetToken('(');
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if (!sc.CheckToken(')'))
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{
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while (sc.TokenType != ')')
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{
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int flags = 0;
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PType *type = NULL;
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PClass *restrict = NULL;
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// Retrieve flags before type name
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for (;;)
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{
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if (sc.CheckToken(TK_Coerce) || sc.CheckToken(TK_Native))
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{
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}
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else
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{
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break;
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}
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}
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// Read the variable type
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sc.MustGetAnyToken();
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switch (sc.TokenType)
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{
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case TK_Bool:
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case TK_Int:
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type = TypeSInt32;
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break;
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case TK_Float:
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type = TypeFloat64;
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break;
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case TK_Sound: type = TypeSound; break;
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case TK_String: type = TypeString; break;
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case TK_Name: type = TypeName; break;
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case TK_State: type = TypeState; break;
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case TK_Color: type = TypeColor; break;
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case TK_Class:
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sc.MustGetToken('<');
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sc.MustGetToken(TK_Identifier); // Get class name
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restrict = PClass::FindClass(sc.String);
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if (restrict == NULL)
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{
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sc.ScriptMessage("Unknown class type %s", sc.String);
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FScriptPosition::ErrorCounter++;
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}
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else
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{
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type = NewClassPointer(restrict);
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}
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sc.MustGetToken('>');
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break;
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case TK_Ellipsis:
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// Making the final type NULL signals a varargs function.
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type = NULL;
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sc.MustGetToken(')');
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sc.UnGet();
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break;
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default:
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sc.ScriptMessage ("Unknown variable type %s", sc.TokenName(sc.TokenType, sc.String).GetChars());
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type = TypeSInt32;
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FScriptPosition::ErrorCounter++;
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break;
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}
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// Read the optional variable name
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if (!sc.CheckToken(',') && !sc.CheckToken(')'))
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{
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sc.MustGetToken(TK_Identifier);
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}
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else
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{
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sc.UnGet();
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}
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if (sc.CheckToken('='))
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{
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flags |= VARF_Optional;
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FxExpression *def = ParseParameter(sc, cls, type, true);
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delete def;
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}
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args.Push(type);
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argflags.Push(flags);
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sc.MustGetAnyToken();
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if (sc.TokenType != ',' && sc.TokenType != ')')
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{
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sc.ScriptError ("Expected ',' or ')' but got %s instead", sc.TokenName(sc.TokenType, sc.String).GetChars());
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}
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}
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}
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sc.MustGetToken(';');
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if (afd != NULL)
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{
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PFunction *sym = new PFunction(funcname);
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sym->AddVariant(NewPrototype(rets, args), argflags, *(afd->VMPointer));
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sym->Flags = VARF_Method | VARF_Action;
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if (error)
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{
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FScriptPosition::ErrorCounter += error;
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}
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else if (cls->Symbols.AddSymbol(sym) == NULL)
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{
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delete sym;
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sc.ScriptMessage ("'%s' is already defined in class '%s'.",
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funcname.GetChars(), cls->TypeName.GetChars());
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FScriptPosition::ErrorCounter++;
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}
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}
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ParseFunctionDef(sc, cls, funcname, rets, VARF_Method | VARF_Action, error);
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}
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//==========================================================================
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