private bool AddMethodToCache(SmallType pType, MethodSyntax pMethod, out MethodDefinition pDefinition)
{
//Check for duplicate method definitions
Compiler.FindResult found;
if (pMethod.SyntaxType == SyntaxType.Method)
{
found = _unit.MethodExists(pType, pMethod);
}
else if (pMethod.SyntaxType == SyntaxType.CastDefinition)
{
found = _unit.CastExists(pType, pMethod.Type, out MethodDefinition pDef);
}
else
{
throw new InvalidOperationException("Unknown method type " + pMethod.SyntaxType.ToString());
}
if (found != Compiler.FindResult.NotFound)
{
if (pMethod.SyntaxType == SyntaxType.Method)
{
CompilerErrors.MethodDuplicate(pMethod, pMethod.Span);
}
else if (pMethod.SyntaxType == SyntaxType.CastDefinition)
{
CompilerErrors.CastDuplicate(pMethod.Parameters[0].Type, pMethod.Type, pMethod.Span);
}
pDefinition = default;
return(false);
}
else
{
//Create the tuple type if we are returning more than one value from a method
//This will cache it in our SmallTypeCache so it can be found later
if (pMethod.ReturnValues.Count > 1)
{
SmallTypeCache.GetOrCreateTuple(SyntaxHelper.SelectNodeTypes(pMethod.ReturnValues));
}
//Set method and return types
foreach (var p in pMethod.Parameters)
{
_unit.FromString(p.TypeNode, out SmallType t);
p.TypeNode.SetType(t);
}
foreach (var r in pMethod.ReturnValues)
{
_unit.FromString(r, out SmallType t);
r.SetType(t);
}
//Add method
pDefinition = _unit.AddMethod(pType, pMethod);
return(true);
}
}
private bool TryPolyMethod(MethodSyntax pMethod, ref MethodCallSyntax pCallSite)
{
System.Diagnostics.Debug.Assert(pMethod.Parameters.Count == pCallSite.Arguments.Count);
//Get name of the new method
StringBuilder name = new StringBuilder(pMethod.Name + "!!!");
for (int i = 0; i < pMethod.Parameters.Count; i++)
{
if (pMethod.Parameters[i].Type.IsTrait)
{
name.Append(pCallSite.Arguments[i].Type.Name + "_");
}
}
name = name.Remove(name.Length - 1, 1);
//Ensure we haven't polymorphed this method before
if (!_polydMethods.ContainsKey(name.ToString()))
{
List <TypedIdentifierSyntax> parameters = new List <TypedIdentifierSyntax>(pMethod.Parameters.Count);
for (int i = 0; i < pMethod.Parameters.Count; i++)
{
TypedIdentifierSyntax parm;
if (pMethod.Parameters[i].Type.IsTrait)
{
//Ensure the argument implements the proper trait... we haven't done type checking yet
if (!pCallSite.Arguments[i].Type.IsAssignableFrom(pMethod.Parameters[i].Type))
{
return(false);
}
parm = SyntaxFactory.TypedIdentifier(SyntaxFactory.Type(pCallSite.Arguments[i].Type.Name), pMethod.Parameters[i].Value);
}
else
{
parm = (TypedIdentifierSyntax)Visit(pMethod.Parameters[i]);
}
parameters.Add(parm);
}
var method = SyntaxFactory.Method(pMethod.Scope, name.ToString(), pMethod.ReturnValues, parameters, (BlockSyntax)Visit(pMethod.Body)).FromNode(pMethod);
var tiv = new Typing.TypeInferenceVisitor(_unit);
tiv.Visit(method);
_unit.AddMethod(null, method);
if (!_polydMethods.ContainsKey(name.ToString()))
{
_polydMethods.Add(name.ToString(), new List <MethodSyntax>());
}
_polydMethods[name.ToString()].Add(method);
}
//Have the call site point to the new method
List <SyntaxNode> arguments = new List <SyntaxNode>(pCallSite.Arguments.Count);
foreach (var a in pCallSite.Arguments)
{
arguments.Add(Visit(a));
}
pCallSite = SyntaxFactory.MethodCall(name.ToString(), arguments);
return(true);
}