/// <summary>
/// function_modifier
/// : '(' [parameter_type_list] ')'
/// </summary>
public static Int32 ParseFunctionModifier(List<Token> src, Int32 begin, out FunctionModifier modifier)
{
// match '('
if (!Parser.EatOperator(src, ref begin, OperatorVal.LPAREN)) {
modifier = null;
return -1;
}
// match constant_expression, if fail, just assume no parameter
ParameterTypeList param_type_list;
Int32 saved = begin;
if ((begin = _parameter_type_list.Parse(src, begin, out param_type_list)) == -1) {
param_type_list = new ParameterTypeList(new List<ParamDecln>());
begin = saved;
}
// match ')'
if (!Parser.EatOperator(src, ref begin, OperatorVal.RPAREN)) {
modifier = null;
return -1;
}
modifier = new FunctionModifier(param_type_list.params_inner_declns, param_type_list.params_varargs);
return begin;
}
public static Int32 Parse(List<Token> src, Int32 begin, out ParameterTypeList param_type_list)
{
return Parser.ParseSequence(
src, begin, out param_type_list,
// parameter_list
_parameter_list.Parse,
// [ ',' '...' ]?
ParseOptionalVarArgs,
(List<ParamDecln> param_list, Boolean is_varargs) => new ParameterTypeList(param_list, is_varargs)
);
}
public FunctionModifier(ParameterTypeList _param_type_list)
: base(Kind.FUNCTION) {
param_type_list = _param_type_list;
}
