public override GamaValueRef VisitExprFQTN([NotNull] GamaParser.ExprFQTNContext context)
{
var names = context.fqtn().Symbol().Select(node => node.GetText()).ToArray();
// Variables/Function
if (names.Length == 1)
{
var val = Parent.Top.FindValueRecursive(names[0]);
if (val == null)
{
// If no target type is given
//if (IsEmptyTT)
//{
var list = Parent.NamespaceContext.FindFunctionRefGlobal(names);
if (list != null)
{
PushCall(list);
}
return(null);
//}
/*
* var target = TopTT;
* if (target is GamaFunction fnty)
* {
* var fn = Parent.NamespaceContext.FindFunctionRefGlobal(names);
* if (fn != null)
* {
* GamaFunctionRef cb;
* // Not always return target type is available
* // For example when searching for a callback, expression compiler might not set return type, only parameter types are necessary anyway
* // But in case of delegates, return types are necessary too.
* if (fnty.ReturnType == null)
* cb = fn.FindFunction(fnty.ParameterTypes);
* else
* cb = fn.FindFunction(fnty.ReturnType, fnty.ParameterTypes);
*
* if (cb == null)
* {
* Parent.NamespaceContext.Context.AddError(new ErrorNoViableOverride(context));
* return null;
* }
* return cb;
* }
* }
*/
Parent.NamespaceContext.Context.AddError(new ErrorIdentifierNotFound(context));
return(null);
}
/* LLVM */
var block = Parent.CurrentBlock;
var builder = Parent.Builder;
// A load is happening?
if (!IsEmptyLoad)
{
if (!TopLoad)
{
return(val);
}
// A load happaning.
if (val.Type is GamaPointer ptr)
{
block.PositionBuilderAtEnd(builder);
var load = builder.BuildLoad(val.Value);
return(new GamaValueRef(ptr.BaseType, load, true)); // Pointers are modifiable LValues
}
/* Code tried to load a non-pointer expression. Eg: *10, *some_function_pointer */
/* Function pointers are not loadable either */
Parent.NamespaceContext.Context.AddError(new ErrorNonPointerLoad(context));
return(null);
}
block.PositionBuilderAtEnd(builder);
if (val.IsModifiableLValue) // Variable
{
var load = builder.BuildLoad(val.Value);
return(new GamaValueRef(val.Type, load, false));
}
// If its not a pointer and not a variable
// Then it must be a parameter, If not god save me. TODO: test this theory later
// Just send it
return(val);
/* oh yah 80% it says
* // I hope this doesnt happen. I am 80% sure this won't hit.
* // You can never be sure enough:
#if DEBUG
* Console.WriteLine("it happened");
#endif
* Parent.NamespaceContext.Context.AddError(new ErrorNonPointerLoad(context));
* return null;
*/
}
// Functions/Types
else
{
var fn = Parent.NamespaceContext.FindFunctionRefGlobal(names);
if (fn == null)
{
Parent.NamespaceContext.Context.AddError(new ErrorTypeMismatch(context));
return(null);
}
if (IsEmptyTT)
{
var list = Parent.NamespaceContext.FindFunctionRefGlobal(names);
if (list != null)
{
PushCall(list);
}
return(null);
}
var target = TopTT;
if (target == null)
{
// This shouldn't happen, this time I'm 90% sure this won't hit
#if DEBUG
Console.WriteLine("yooooo");
#endif
return(null);
}
if (!(target is GamaFunction fnty))
{
Parent.NamespaceContext.Context.AddError(new ErrorTypeMismatch(context));
return(null);
}
var cb = fn.FindFunction(fnty.ParameterTypes);
if (cb == null)
{
Parent.NamespaceContext.Context.AddError(new ErrorNoViableOverride(context));
return(null);
}
return(cb);
}
}
/// <summary>
/// Visit a parse tree produced by the <c>ExprFQTN</c>
/// labeled alternative in <see cref="GamaParser.expr"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitExprFQTN([NotNull] GamaParser.ExprFQTNContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by the <c>ExprFQTN</c>
/// labeled alternative in <see cref="GamaParser.expr"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitExprFQTN([NotNull] GamaParser.ExprFQTNContext context)
{
}
