public LocalBuilderInfo AddLocal(string name, LocalBuilder builder)
{
LocalBuilderInfo info = new LocalBuilderInfo(Locals.Count, name, builder);
Locals.Add(name, info);
return(info);
}
public override void VisitIdentifier(ASTIdentifier n)
{
_lastWalkedIdentifier = n.ID;
//yeah this gets a bit messy, but I kinda do need to check all 3 possibilities where an identifier could
//be declared (we're not doing globals in the language).
if (n.IsLeftHandSide)
{
if (IsIdentifierLocal(n.ID))
{
LocalBuilderInfo localInfo = _currentMethodBuilder.Locals[n.ID];
_assignmentCallback = gen => gen.Emit(OpCodes.Stloc, localInfo.Index);
}
else if (IsIdentifierField(n.ID))
{
FieldBuilder field = _currentTypeBuilder.FieldMap[n.ID];
//push the "this" argument
_gen.Emit(OpCodes.Ldarg_0);
_assignmentCallback = gen => gen.Emit(OpCodes.Stfld, field);
}
else if (IsIdentifierArgument(n.ID))
{
_assignmentCallback = gen => gen.Emit(OpCodes.Starg, _currentMethodBuilder.Arguments[n.ID].Index);
}
else
{
throw new Exception(String.Format("Identifier '{0}' is not a local, argument, or member variable of the current class.", n.ID));
}
}
else
{
if (IsIdentifierLocal(n.ID))
{
var info = _currentMethodBuilder.Locals[n.ID];
_gen.Emit(OpCodes.Ldloc, info.Index);
_lastWalkedType = info.Builder.LocalType;
}
else if (IsIdentifierField(n.ID))
{
FieldBuilder field = _currentTypeBuilder.FieldMap[n.ID];
_gen.Emit(OpCodes.Ldarg_0);
_gen.Emit(OpCodes.Ldfld, field);
_lastWalkedType = field.FieldType;
}
else if (IsIdentifierArgument(n.ID))
{
ArgumentInfo info = _currentMethodBuilder.Arguments[n.ID];
int index = info.Index;
if (!_currentMethodBuilder.Method.IsStatic)
{
index++;
}
_gen.Emit(OpCodes.Ldarg, index);
_lastWalkedType = info.CilType;
}
}
}
public override void VisitDeclLocal(ASTDeclarationLocal n)
{
//Get type
n.Type.Visit(this);
LocalBuilder builder = _gen.DeclareLocal(_lastWalkedType);
//keep track of the LocalBuilder
LocalBuilderInfo info = _currentMethodBuilder.AddLocal(n.ID, builder);
//set value if needed
if (n.InitialValue != null)
{
n.InitialValue.Visit(this);
//store it to the local
_gen.Emit(OpCodes.Stloc, info.Index);
}
}