public override bool VisitStmtVarDefBase([NotNull] GamaParser.StmtVarDefBaseContext context)
{
var name = context.Symbol().GetText();
var val = Top.FindValue(name);
// Duplicate variable definition (parent frames can have same variable, it will be overriden in current frame)
if (val != null)
{
NamespaceContext.Context.AddError(new ErrorDuplicateVariable(context));
return(false);
}
val = VisitExpression(context.expr());
if (val == null)
{
return(false);
}
/* LLVM */
CurrentBlock.PositionBuilderAtEnd(Builder);
var alloc = Builder.BuildAlloca(val.Type.UnderlyingType, name);
Builder.BuildStore(val.Value, alloc);
Top.AddValue(name, new GamaValueRef(val.Type, alloc, true));
return(true);
}
public override bool VisitStmtVarDefNull([NotNull] GamaParser.StmtVarDefNullContext context)
{
var name = context.Symbol().GetText();
var val = Top.FindValue(name);
if (val != null)
{
NamespaceContext.Context.AddError(new ErrorDuplicateVariable(context));
return(false);
}
var ty = NamespaceContext.FindTypeRefGlobal(context.typeName());
if (ty == null)
{
NamespaceContext.Context.AddError(new ErrorTypeNotFound(context.typeName()));
return(false);
}
if (ty == InstanceTypes.Void)
{
NamespaceContext.Context.AddError(new ErrorVariableVoid(context.typeName()));
return(false);
}
/* LLVM */
CurrentBlock.PositionBuilderAtEnd(Builder);
if (ty is GamaFunction) // Functionals are not allocated directly, instead a pointer is allocateds
{
var ptr = new GamaPointer(ty);
var alloc = Builder.BuildAlloca(ptr.UnderlyingType, name);
Builder.BuildStore(LLVMValueRef.CreateConstPointerNull(ptr.UnderlyingType), alloc);
Top.AddValue(name, new GamaValueRef(ty, alloc, true));
}
else
{
var alloc = Builder.BuildAlloca(ty.UnderlyingType, name);
// TODO: maybe add an option to not null initialize these variable definitions
// Possible speed boost
Builder.BuildStore(LLVMValueRef.CreateConstNull(ty.UnderlyingType), alloc);
Top.AddValue(name, new GamaValueRef(ty, alloc, true));
}
return(true);
}
public override bool VisitStmtVarDefFull([NotNull] GamaParser.StmtVarDefFullContext context)
{
var name = context.Symbol().GetText();
var val = Top.FindValue(name);
if (val != null)
{
NamespaceContext.Context.AddError(new ErrorDuplicateVariable(context));
return(false);
}
var ty = NamespaceContext.FindTypeRefGlobal(context.typeName());
if (ty == null)
{
NamespaceContext.Context.AddError(new ErrorTypeNotFound(context.typeName()));
return(false);
}
if (ty == InstanceTypes.Void)
{
NamespaceContext.Context.AddError(new ErrorVariableVoid(context.typeName()));
return(false);
}
val = VisitExpression(ty, context.expr());
if (val == null)
{
return(false);
}
// If expression compiler returns a function then it's impossible for a type mismatch to happen
// Expression compiler checks for type mismatches when evaluating function pointers
// Alsp no need to check if 'ty' is a GamaFunction either, expressiom compiler already did that
if (val.Type is GamaFunction valtyfn)
{
var tyfn = new GamaPointer(ty as GamaFunction);
/* LLVM */
CurrentBlock.PositionBuilderAtEnd(Builder);
var alloc = Builder.BuildAlloca(tyfn.UnderlyingType, name);
Builder.BuildStore(val.Value, alloc);
Top.AddValue(name, new GamaValueRef(ty, alloc, true));
return(true);
}
// If not function, there might be a mismatch. Check it and error if it mismatches
if (val.Type != ty)
{
NamespaceContext.Context.AddError(new ErrorTypeMismatch(context.expr()));
return(false);
}
/* LLVM */
// One block above to avoid dumb C# error message saying 'alloc' is already defined (SOMEHOW)
{
CurrentBlock.PositionBuilderAtEnd(Builder);
var alloc = Builder.BuildAlloca(ty.UnderlyingType, name);
Builder.BuildStore(val.Value, alloc);
Top.AddValue(name, new GamaValueRef(ty, alloc, true));
}
return(true);
}
