public LNode GetMethodSignature()
{
if (Basis != null && Basis.Calls(S.Fn) && Basis.ArgCount.IsInRange(3, 4)) {
var parts = Basis.Args;
if (parts.Count == 4)
parts.RemoveAt(3);
if (IsRecognizer)
parts[0] = F.Bool;
parts[1] = F.Id(Name);
// remove OneLiner style to avoid suppresing newlines in output for one-line rules
return Basis.WithArgs(parts).SetStyle(Basis.Style & ~NodeStyle.OneLiner);
} else {
var method = F.Fn(IsRecognizer ? F.Bool : F.Void, F.Id(Name), F.List());
if (IsPrivate == true)
method = F.Attr(F.Id(S.Private), method);
else if (IsStartingRule | IsToken)
method = F.Attr(F.Id(S.Public), method);
return method;
}
}
/// <summary>Creates the default method definition wrapped around the body
/// of the rule, which was generated by the caller. Returns <see cref="Basis"/>
/// with the specified new method body. If Basis is null, a simple default
/// method signature is used, e.g. <c>public void R() {...}</c> where R is
/// the rule name.</summary>
/// <param name="methodBody">The parsing code that was generated for this rule.</param>
/// <returns>A method.</returns>
public virtual LNode CreateRuleMethod(Rule rule, LNodeList methodBody)
{
LNode method = rule.GetMethodSignature();
var parts = method.Args.ToWList();
if (parts[0].IsIdNamed(S.Missing))
{
parts[0] = F.Id(rule.Name);
}
Debug.Assert(parts.Count == 3);
if (rule.IsRecognizer)
{
methodBody.Add(F.Call(S.Return, F.True));
}
parts.Add(F.OnNewLine(F.Braces(methodBody)));
return(method.WithArgs(parts.ToLNodeList()));
}
