static FxExpression *ParseExpression0 (FScanner &sc, PClassActor *cls)
{
FScriptPosition scpos(sc);
if (sc.CheckToken('('))
{
FxExpression *data = ParseExpressionM (sc, cls);
sc.MustGetToken(')');
return data;
}
else if (sc.CheckToken(TK_True))
{
return new FxConstant(1, scpos);
}
else if (sc.CheckToken(TK_False))
{
return new FxConstant(0, scpos);
}
else if (sc.CheckToken(TK_IntConst))
{
return new FxConstant(sc.Number, scpos);
}
else if (sc.CheckToken(TK_FloatConst))
{
return new FxConstant(sc.Float, scpos);
}
else if (sc.CheckToken(TK_NameConst))
{
return new FxConstant(sc.Name, scpos);
}
else if (sc.CheckToken(TK_StringConst))
{
// String parameters are converted to names. Technically, this should be
// done at a higher level, as needed, but since no functions take string
// arguments and ACS_NamedExecuteWithResult/CallACS need names, this is
// a cheap way to get them working when people use "name" instead of 'name'.
return new FxConstant(FName(sc.String), scpos);
}
else if (sc.CheckToken(TK_Identifier))
{
FName identifier = FName(sc.String);
FArgumentList *args;
PFunction *func;
switch (identifier)
{
case NAME_Random:
case NAME_FRandom:
return ParseRandom(sc, identifier, cls);
case NAME_RandomPick:
case NAME_FRandomPick:
return ParseRandomPick(sc, identifier, cls);
case NAME_Random2:
return ParseRandom2(sc, cls);
default:
break;
}
if (sc.CheckToken('('))
{
switch (identifier)
{
case NAME_Min:
case NAME_Max:
return ParseMinMax(sc, identifier, cls);
case NAME_Clamp:
return ParseClamp(sc, cls);
case NAME_Abs:
return ParseAbs(sc, cls);
default:
args = new FArgumentList;
func = dyn_cast<PFunction>(cls->Symbols.FindSymbol(identifier, true));
try
{
// There is an action function ACS_NamedExecuteWithResult which must be ignored here for this to work.
if (func != NULL && identifier != NAME_ACS_NamedExecuteWithResult)
{
sc.UnGet();
ParseFunctionParameters(sc, cls, *args, func, "", NULL);
return new FxVMFunctionCall(func, args, sc);
}
else if (!sc.CheckToken(')'))
{
do
{
args->Push(ParseExpressionM (sc, cls));
}
while (sc.CheckToken(','));
sc.MustGetToken(')');
}
return new FxFunctionCall(NULL, identifier, args, sc);
}
catch (...)
{
delete args;
throw;
}
break;
}
}
else
{
return new FxIdentifier(identifier, sc);
}
}
else
{
FString tokname = sc.TokenName(sc.TokenType, sc.String);
sc.ScriptError ("Unexpected token %s", tokname.GetChars());
}
return NULL;
}
static FxExpression *ParseExpression0 (FScanner &sc, PClassActor *cls)
{
FScriptPosition scpos(sc);
if (sc.CheckToken('('))
{
FxExpression *data = ParseExpressionM (sc, cls);
sc.MustGetToken(')');
return data;
}
else if (sc.CheckToken(TK_True))
{
return new FxConstant(1, scpos);
}
else if (sc.CheckToken(TK_False))
{
return new FxConstant(0, scpos);
}
else if (sc.CheckToken(TK_IntConst))
{
return new FxConstant(sc.Number, scpos);
}
else if (sc.CheckToken(TK_FloatConst))
{
return new FxConstant(sc.Float, scpos);
}
else if (sc.CheckToken(TK_NameConst))
{
return new FxConstant(sc.Name, scpos);
}
else if (sc.CheckToken(TK_StringConst))
{
// String parameters are converted to names. Technically, this should be
// done at a higher level, as needed, but since no functions take string
// arguments and ACS_NamedExecuteWithResult/CallACS need names, this is
// a cheap way to get them working when people use "name" instead of 'name'.
return new FxConstant(FName(sc.String), scpos);
}
else if (sc.CheckToken(TK_Random))
{
FRandom *rng;
if (sc.CheckToken('['))
{
sc.MustGetToken(TK_Identifier);
rng = FRandom::StaticFindRNG(sc.String);
sc.MustGetToken(']');
}
else
{
rng = &pr_exrandom;
}
sc.MustGetToken('(');
FxExpression *min = ParseExpressionM (sc, cls);
sc.MustGetToken(',');
FxExpression *max = ParseExpressionM (sc, cls);
sc.MustGetToken(')');
return new FxRandom(rng, min, max, sc);
}
else if (sc.CheckToken(TK_RandomPick) || sc.CheckToken(TK_FRandomPick))
{
bool floaty = sc.TokenType == TK_FRandomPick;
FRandom *rng;
TArray<FxExpression*> list;
list.Clear();
int index = 0;
if (sc.CheckToken('['))
{
sc.MustGetToken(TK_Identifier);
rng = FRandom::StaticFindRNG(sc.String);
sc.MustGetToken(']');
}
else
{
rng = &pr_exrandom;
}
sc.MustGetToken('(');
for (;;)
{
FxExpression *expr = ParseExpressionM(sc, cls);
list.Push(expr);
if (sc.CheckToken(')'))
break;
sc.MustGetToken(',');
}
return new FxRandomPick(rng, list, floaty, sc);
}
else if (sc.CheckToken(TK_FRandom))
{
FRandom *rng;
if (sc.CheckToken('['))
{
sc.MustGetToken(TK_Identifier);
rng = FRandom::StaticFindRNG(sc.String);
sc.MustGetToken(']');
}
else
{
rng = &pr_exrandom;
}
sc.MustGetToken('(');
FxExpression *min = ParseExpressionM (sc, cls);
sc.MustGetToken(',');
FxExpression *max = ParseExpressionM (sc, cls);
sc.MustGetToken(')');
return new FxFRandom(rng, min, max, sc);
}
else if (sc.CheckToken(TK_Random2))
{
FRandom *rng;
if (sc.CheckToken('['))
{
sc.MustGetToken(TK_Identifier);
rng = FRandom::StaticFindRNG(sc.String);
sc.MustGetToken(']');
}
else
{
rng = &pr_exrandom;
}
sc.MustGetToken('(');
FxExpression *mask = NULL;
if (!sc.CheckToken(')'))
{
mask = ParseExpressionM(sc, cls);
sc.MustGetToken(')');
}
return new FxRandom2(rng, mask, sc);
}
else if (sc.CheckToken(TK_Abs))
{
sc.MustGetToken('(');
FxExpression *x = ParseExpressionM (sc, cls);
sc.MustGetToken(')');
return new FxAbs(x);
}
else if (sc.CheckToken(TK_Identifier))
{
FName identifier = FName(sc.String);
if (sc.CheckToken('('))
{
FArgumentList *args = new FArgumentList;
PFunction *func = dyn_cast<PFunction>(cls->Symbols.FindSymbol(identifier, true));
try
{
if (func != NULL)
{
sc.UnGet();
ParseFunctionParameters(sc, cls, *args, func, "", NULL);
return new FxVMFunctionCall(func, args, sc);
}
else if (!sc.CheckToken(')'))
{
do
{
args->Push(ParseExpressionM (sc, cls));
}
while (sc.CheckToken(','));
sc.MustGetToken(')');
}
return new FxFunctionCall(NULL, identifier, args, sc);
}
catch (...)
{
delete args;
throw;
}
}
else
{
return new FxIdentifier(identifier, sc);
}
}
else
{
FString tokname = sc.TokenName(sc.TokenType, sc.String);
sc.ScriptError ("Unexpected token %s", tokname.GetChars());
}
return NULL;
}