public override bool VisitTopLevelFuncDef([NotNull] GamaParser.TopLevelFuncDefContext context)
{
var name = context.Symbol().GetText();
var fnlist = NamespaceContext.FindFunctionRef(name);
var attrs = context.funcAttr();
// New function
if (fnlist == null)
{
fnlist = new GamaFunctionList(name);
var stplist = context.symbolTypePairList();
var parms = new GamaParamList();
var parmTypes = new GamaTypeRef[0];
var parmTypesNative = new LLVMTypeRef[0];
if (stplist != null)
{
var list = stplist.symbolTypePair();
parmTypes = new GamaTypeRef[list.Length];
parmTypesNative = new LLVMTypeRef[list.Length];
for (int i = 0; i < list.Length; i++)
{
var stp = list[i];
var sym = stp.Symbol();
var type = NamespaceContext.FindTypeRefGlobal(stp.typeName());
if (type == null)
{
GlobalContext.AddError(new ErrorTypeNotFound(stp.typeName()));
return(false);
}
/* Since functions are not first-class types, we need to wrap them around with a pointer */
if (type is GamaFunction)
{
type = new GamaPointer(type);
}
if (!parms.Add(sym.GetText(), type))
{
GlobalContext.AddError(new ErrorDuplicateParameter(stp));
return(false); // TODO: fix error library.
}
parmTypesNative[i] = type.UnderlyingType;
parmTypes[i] = type;
}
}
/* Determine type */
var rettypefqtn = context.typeName();
var retty = InstanceTypes.Void;
// If function has a non-void type
if (rettypefqtn != null)
{
// Find it
retty = NamespaceContext.FindTypeRefGlobal(rettypefqtn);
if (retty == null)
{
GlobalContext.AddError(new ErrorTypeNotFound(rettypefqtn));
return(false);
}
}
/* LLVM */
var modty = new GamaFunction(retty, parmTypes, LLVMTypeRef.CreateFunction(retty.UnderlyingType, parmTypesNative));
var modfn = NamespaceContext.This.Context.Module.AddFunction(name, modty.UnderlyingType);
var fn = new GamaFunctionRef(retty, parms, modty, modfn, false);
var unit = new GamaFunctionCompiler(NamespaceContext, fn);
/* Parameters are added to top frame of the target function, but they are not treated as conventional variables */
foreach (var p in parms.Parameters)
{
unit.Top.AddValue(p.Name, new GamaValueRef(p.Type, modfn.GetParam(p.Index), false));
}
unit.Visit(context.block());
if (unit.Finish() == 0)
{
// First add ident, if it fails you fail too.
if (attrs != null)
{
var attributes = new GamaAttributeCompiler(this).Visit(attrs);
if (attributes != null)
{
fn.Attributes = attributes;
}
else
{
return(false);
}
}
fnlist.AddFunction(fn);
NamespaceContext.This.Functions.Add(fnlist);
}
else
{
; // ?gnihtemos oD :ODOT (TODO:)
}
return(true);
}
// An override function
else
{
var stplist = context.symbolTypePairList();
var parms = new GamaParamList();
if (stplist != null)
{
var list = stplist.symbolTypePair();
for (int i = 0; i < list.Length; i++)
{
var stp = list[i];
var sym = stp.Symbol();
var type = NamespaceContext.FindTypeRefGlobal(stp.typeName());
if (type == null)
{
GlobalContext.AddError(new ErrorTypeNotFound(stp.typeName()));
return(false);
}
if (type is GamaFunction)
{
if (!parms.Add(sym.GetText(), new GamaPointer(type)))
{
GlobalContext.AddError(new ErrorDuplicateParameter(stp));
return(false); // TODO: fix error library.
}
continue;
}
if (!parms.Add(sym.GetText(), type))
{
GlobalContext.AddError(new ErrorDuplicateParameter(stp));
return(false);
}
}
}
// Duplicate function if two functions have same type of parameters
if (fnlist.FindFunction(parms) != null)
{
GlobalContext.AddError(new ErrorDuplicateFunction(context));
return(false);
}
/* Determine type */
var rettypefqtn = context.typeName();
var retty = InstanceTypes.Void;
// If function has a non-void type
if (rettypefqtn != null)
{
// Find it
retty = NamespaceContext.FindTypeRefGlobal(rettypefqtn);
if (retty == null)
{
GlobalContext.AddError(new ErrorTypeNotFound(rettypefqtn));
return(false);
}
}
var modty = new GamaFunction(retty, parms.Parameters.Select(p => p.Type).ToArray(), LLVMTypeRef.CreateFunction(retty.UnderlyingType, parms.Parameters.Select(p => p.Type.UnderlyingType).ToArray()));
var modfn = GlobalContext.Module.AddFunction(name, modty.UnderlyingType);
var fn = new GamaFunctionRef(retty, parms, modty, modfn, false);
var unit = new GamaFunctionCompiler(NamespaceContext, fn);
unit.Visit(context.block());
if (unit.Finish() == 0)
{
if (attrs != null)
{
var attributes = new GamaAttributeCompiler(this).Visit(attrs);
if (attributes != null)
{
fn.Attributes = attributes;
}
else
{
return(false);
}
}
fnlist.AddFunction(fn);
}
else
{
; // TODO:
}
return(true);
}
}