/// <summary>
/// Declares a new function.
/// </summary>
private void declareFunction(FunctionNode node)
{
if (node.Name == "_")
{
Error(CompilerMessages.UnderscoreName);
}
var isVariadic = false;
// validation
if (node.Arguments.Count > 0)
{
for (var idx = 0; idx < node.Arguments.Count; idx++)
{
var curr = node.Arguments[idx];
if (curr.Name == "_")
{
curr.Name = Unique.AnonymousArgName();
}
if (curr.Type == typeof(UnspecifiedType))
{
Error(CompilerMessages.LambdaArgTypeUnknown);
}
if (curr.IsVariadic)
{
if (idx < node.Arguments.Count - 1)
{
Error(CompilerMessages.VariadicArgumentNotLast);
}
isVariadic = true;
}
}
}
else
{
if (node.Name == EntityNames.RunMethodName || node.Name == EntityNames.EntryPointMethodName)
{
Error(CompilerMessages.ReservedFunctionRedefinition, node.Name);
}
}
var method = MainType.CreateMethod(node.Name, node.ReturnTypeSignature, node.Arguments, true, prepare: false);
method.Kind = TypeContentsKind.UserDefined;
method.IsPure = node.IsPure;
method.IsVariadic = isVariadic;
method.Body = node.Body;
}