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Fixed some things around

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This commit is contained in:
ZZYZX 2017-02-17 23:36:16 +02:00
parent 3056570ea9
commit 014db18f2a
3 changed files with 24 additions and 23 deletions
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36
src/scripting/backend/codegen.cpp
View file

@ -6715,16 +6715,17 @@ bool FxStructMember::RequestAddress(FCompileContext &ctx, bool *writable)
if ((classx->ExprType == EFX_Self) && (ctx.Function && (ctx.Function->Variants[0].Flags & VARF_ReadOnly)))
bWritable = false;
}
// [ZZ] plain data "inherits" scope of whatever it was defined in.
if (bWritable) // don't do complex checks on early fail
// [ZZ] implement write barrier between different scopes
if (bWritable)
{
int outerflags = 0;
if (ctx.Function)
outerflags = ctx.Function->Variants[0].Flags;
FScopeBarrier scopeBarrier(outerflags, FScopeBarrier::FlagsFromSide(BarrierSide), membervar->SymbolName.GetChars());
FScopeBarrier scopeBarrier(outerflags, FScopeBarrier::FlagsFromSide(BarrierSide), "<unknown>");
if (!scopeBarrier.writable)
bWritable = false;
}
*writable = bWritable;
}
return true;
@ -6769,7 +6770,7 @@ FxExpression *FxStructMember::Resolve(FCompileContext &ctx)
}
BarrierSide = scopeBarrier.sidelast;
if (classx->ExprType == EFX_StructMember || classx->ExprType == EFX_ClassMember)
if (classx->ExprType == EFX_StructMember) // note: only do this for structs now
{
FxStructMember* pmember = (FxStructMember*)classx;
if (BarrierSide == FScopeBarrier::Side_PlainData && pmember)
@ -6793,7 +6794,8 @@ FxExpression *FxStructMember::Resolve(FCompileContext &ctx)
{
auto parentfield = static_cast<FxMemberBase *>(classx)->membervar;
// PFields are garbage collected so this will be automatically taken care of later.
auto newfield = new PField(NAME_None, membervar->Type, membervar->Flags | parentfield->Flags, membervar->Offset + parentfield->Offset);
// [ZZ] call ChangeSideInFlags to ensure that we don't get ui+play
auto newfield = new PField(NAME_None, membervar->Type, FScopeBarrier::ChangeSideInFlags(membervar->Flags | parentfield->Flags, BarrierSide), membervar->Offset + parentfield->Offset);
newfield->BitValue = membervar->BitValue;
static_cast<FxMemberBase *>(classx)->membervar = newfield;
classx->isresolved = false; // re-resolve the parent so it can also check if it can be optimized away.
@ -8023,22 +8025,22 @@ isresolved:
// [ZZ] if self is a struct or a class member, check if it's valid to call this function at all.
// implement more magic
if (Self->ExprType == EFX_ClassMember || Self->ExprType == EFX_StructMember)
int outerflags = 0;
if (ctx.Function)
outerflags = ctx.Function->Variants[0].Flags;
int innerflags = afd->Variants[0].Flags;
if (Self->ExprType == EFX_StructMember)
{
FxStructMember* pmember = (FxStructMember*)Self;
int outerflags = 0;
if (ctx.Function)
outerflags = ctx.Function->Variants[0].Flags;
int innerflags = afd->Variants[0].Flags;
if (FScopeBarrier::SideFromFlags(innerflags) == FScopeBarrier::Side_PlainData)
innerflags = FScopeBarrier::ChangeSideInFlags(innerflags, pmember->BarrierSide);
FScopeBarrier scopeBarrier(outerflags, innerflags, MethodName.GetChars());
if (!scopeBarrier.callable)
{
ScriptPosition.Message(MSG_ERROR, "%s", scopeBarrier.callerror.GetChars());
delete this;
return nullptr;
}
}
FScopeBarrier scopeBarrier(outerflags, innerflags, MethodName.GetChars());
if (!scopeBarrier.callable)
{
ScriptPosition.Message(MSG_ERROR, "%s", scopeBarrier.callerror.GetChars());
delete this;
return nullptr;
}
if (staticonly && (afd->Variants[0].Flags & VARF_Method))

2
src/scripting/backend/codegen.h
View file

@ -187,7 +187,7 @@ struct FScopeBarrier
sidelast = sideto;
else sideto = sidelast;
if ((sideto == Side_UI) != (sidefrom == Side_UI)) // only ui -> ui is readable
if ((sideto == Side_UI) && (sidefrom != Side_UI)) // only ui -> ui is readable
{
readable = false;
readerror.Format("Can't read %s field %s from %s context", StringFromSide(sideto), name, StringFromSide(sidefrom));

9
src/scripting/zscript/zcc_compile.cpp
View file

@ -2397,9 +2397,9 @@ void ZCCCompiler::CompileFunction(ZCC_StructWork *c, ZCC_FuncDeclarator *f, bool
if (varflags & VARF_Final)
sym->Variants[0].Implementation->Final = true;
// [ZZ] unspecified virtual function inherits old scope. virtual function scope can't be changed.
if (f->Flags & ZCC_UIFlag) // only direct specification here (varflags can also have owning class scope applied, we don't want that)
if (varflags & VARF_UI)
sym->Variants[0].Implementation->ScopeUI = true;
if (f->Flags & ZCC_Play) // only direct specification here
if (varflags & VARF_Play)
sym->Variants[0].Implementation->ScopePlay = true;
if (varflags & VARF_ReadOnly)
sym->Variants[0].Implementation->FuncConst = true;
@ -2422,8 +2422,7 @@ void ZCCCompiler::CompileFunction(ZCC_StructWork *c, ZCC_FuncDeclarator *f, bool
Error(f, "Attempt to override final function %s", FName(f->Name).GetChars());
}
// you can't change ui/play/clearscope for a virtual method.
if ((oldfunc->ScopePlay != sym->Variants[0].Implementation->ScopePlay) ||
(oldfunc->ScopeUI != sym->Variants[0].Implementation->ScopeUI))
if (f->Flags & (ZCC_UIFlag|ZCC_Play|ZCC_ClearScope))
{
Error(f, "Attempt to change scope for virtual function %s", FName(f->Name).GetChars());
}
@ -2432,7 +2431,7 @@ void ZCCCompiler::CompileFunction(ZCC_StructWork *c, ZCC_FuncDeclarator *f, bool
{
Error(f, "Attempt to change const qualifier for virtual function %s", FName(f->Name).GetChars());
}
// inherit scope of original function
// inherit scope of original function if override not specified
if (sym->Variants[0].Implementation->ScopeUI = oldfunc->ScopeUI)
sym->Variants[0].Flags = (sym->Variants[0].Flags&~(VARF_Play)) | VARF_UI;
else if (sym->Variants[0].Implementation->ScopePlay = oldfunc->ScopePlay)