private void AddActionToProduction(Production prod, ActionProxy proxy)
{
// Version 1.3.1 no longer explicitly calls FixInternalReduction().
// It is easier to adopt a consistent approach and
// let AddXxxToProd check for a trailing action
// prior to adding symbols or a new action.
//
if (proxy != null)
{
if (prod.semanticAction != null || prod.precSpan != null)
{
FixInternalReduction(prod);
}
LexSpan cSpan = proxy.codeBlock; // LexSpan of action code
LexSpan pSpan = proxy.precedenceToken; // LexSpan of ident in %prec ident
if (pSpan != null)
{
prod.prec = grammar.LookupTerminal(Token.ident, pSpan.ToString()).prec;
prod.precSpan = proxy.precedenceSpan;
}
if (cSpan != null)
{
prod.semanticAction = new SemanticAction(prod, prod.rhs.Count, cSpan);
}
}
}
internal static string GetVerbatimString(LexSpan span)
{
string text = span.ToString();
if (text[0] != '@' || text[1] != '\"' || text[text.Length - 1] != '\"')
{
throw new GppgInternalException("Internal error: invalid litstring");
}
text = text.Substring(2, text.Length - 3);
return(CharacterUtilities.InterpretEscapesInVerbatimString(text));
}
// ===============================================================
//
// Various helpers for the semantic actions of the parser
// Rules Part Helpers
//
// ===============================================================
private void SetCurrentLHS(LexSpan lhs)
{
string lhsName = lhs.ToString();
NonTerminal nt = grammar.LookupNonTerminal(lhsName);
if (grammar.terminals.ContainsKey(lhsName))
{
handler.ListError(lhs, 76);
}
currentLHS = nt;
if (grammar.startSymbol == null)
{
grammar.startSymbol = nt;
}
if (grammar.productions.Count == 0)
{
grammar.CreateSpecialProduction(grammar.startSymbol);
}
}