private void DefineOperator(LeafParser.Def_operatorContext def, LeafParser.Attribute_addContext[]?attribs)
{
var impl = def.function_impl();
var name = def.operator_id().GetText();
try
{
var func = DefineFunction(name, null, impl, def.generic_def_list(), attribs);
if ((func.Flags & FunctionFlags.MemberFunc) == 0)
{
throw new CompilationException("Operator is not bound to a type. Consider using 'this' as the first parameter.",
this, def.Start.Line);
}
var requiredParameters = name switch
{
"as" => 1,
"+" or "-" or "*" or "/" or "%" => 2,
_ => throw new NotImplementedException($"Operator {name} is not supported.")
};
if (func.Parameters.Count != requiredParameters)
{
throw new CompilationException($"Invalid number of parameters specified. Required: {requiredParameters}, found: {func.Parameters.Count}.",
this, def.Start.Line);
}
}
catch (CompilationException e)
{ throw new CompilationException($"Could not define operator '{name}'.", this, def.Start.Line, e); }
}
/// <summary>
/// Visit a parse tree produced by <see cref="LeafParser.def_operator"/>.
/// <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 VisitDef_operator([NotNull] LeafParser.Def_operatorContext context)
{
return(VisitChildren(context));
}
