internal Terminal LookupOrDefineTerminal(Token token, string name, string alias, LexSpan span)
{
bool isIdent = (token == Token.ident);
Terminal result = null;
// Canonicalize escaped char-literals
if (!isIdent)
{
name = CharacterUtilities.CanonicalizeCharacterLiteral(name, 1);
}
else if (alias != null)
{
alias = CharacterUtilities.CanonicalizeAlias(alias);
}
// Check if already present in dictionary
if (!terminals.ContainsKey(name)) // terminal not already known
{
result = new Terminal(isIdent, name, alias);
terminals[name] = result;
if (alias != null)
{
CheckAndSetAlias(alias, result, span);
}
}
else
{
result = terminals[name];
if (alias != null)
{
CheckAlias(alias, result, span);
}
}
return(result);
}
internal static bool BumpsMax(string str)
{
string num = CharacterUtilities.CanonicalizeCharacterLiteral(str, 1);
int ord = CharacterUtilities.OrdinalOfCharacterLiteral(str, 1);
return(ord > Terminal.max);
}
internal Terminal LookupTerminal(Token token, string name)
{
bool isIdent = (token == Token.ident);
// Canonicalize escaped char-literals
if (!isIdent)
{
name = CharacterUtilities.CanonicalizeCharacterLiteral(name, 1);
}
// Check if already present in dictionary
if (!terminals.ContainsKey(name)) // else insert ...
{
terminals[name] = new Terminal(isIdent, name);
}
return(terminals[name]);
}