// Converts the subject of a substitution expr like $'*' to a valid ident-
// ifier, under the assumption that it doesn't refer to a rule or label.
static Symbol PickVarNameForLNode(LNode label)
{
if (label.IsId)
{
// Ignore the predefined special substitutions $LA and $LI
//if (label.Name.Name == "LA" || label.Name.Name == "LI")
// return null;
return(GSymbol.Get("tok_" + label.Name));
}
else if (label.IsLiteral)
{
return(LiteralToVarName(label.Value));
}
else if (label.Calls(S.Dot, 2))
{
return(GSymbol.Get("tok__" + label.Args[1].Name));
}
else if (label.Calls(S.DotDot, 2) || label.Calls(S.DotDotDot, 2))
{
return(GSymbol.Get(PickVarNameForLNode(label[0]).Name + "_" + PickVarNameForLNode(label[1]).Name));
}
else // can't return null
{
return(GSymbol.Get(label.GetHashCode().ToString()));
}
}
// Converts the subject of a substitution expr like $'*' to a valid ident-
// ifier, under the assumption that it doesn't refer to a rule or label.
static Symbol PickVarNameForLNode(LNode label)
{
if (label.IsId) {
// Ignore the predefined special substitutions $LA and $LI
//if (label.Name.Name == "LA" || label.Name.Name == "LI")
// return null;
return GSymbol.Get("tok_" + label.Name);
} else if (label.IsLiteral) {
return LiteralToVarName(label.Value);
} else if (label.Calls(S.Dot, 2))
return GSymbol.Get("tok__" + label.Args[1].Name);
else if (label.Calls(S.DotDot, 2))
return GSymbol.Get(PickVarNameForLNode(label[0]).Name + "_" + PickVarNameForLNode(label[1]).Name);
else // can't return null
return GSymbol.Get(label.GetHashCode().ToString());
}
