/// <summary>
/// Checks if the variable already exists. This does not allow for shadowing of variables, maybe as an
/// enhancement, cause it wouldn't be that hard.
///
/// Cflat also allows for declarations and assignments on the same line, so this will process the InitialValue sub tree
/// as well.
/// </summary>
/// <param name="n"></param>
public override void VisitDeclLocal(ASTDeclarationLocal n)
{
if (!_scopeMgr.HasSymbol(n.ID))
{
CFlatType lhs = CheckSubTree(n.Type);
//Check if the code is also assigning a value on the same line
bool valid = true;
if (n.InitialValue != null)
{
CFlatType rhs = CheckSubTree(n.InitialValue);
if (rhs is TypeFunction && ((TypeFunction)rhs).IsConstructor)
{
rhs = new TypeClass(((TypeFunction)rhs).Name);
}
if (!IsValidAssignment(lhs, rhs))
{
valid = false;
ReportError(n.Location, "Invalid assignment, type mismatch. Expected: {0} Got: {1}", TypeToFriendlyName(lhs), TypeToFriendlyName(rhs));
}
}
if (valid)
{
_scopeMgr.AddLocal(n.ID, lhs, _currentMethod);
}
}
else
{
ReportError(n.Location, "The identifier '{0}' already exists", n.ID);
}
}
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);
}
}