public LeftRecursiveRuleFunction(OutputModelFactory factory, LeftRecursiveRule r)
: base(factory, r)
{
// Since we delete x=lr, we have to manually add decls for all labels
// on left-recur refs to proper structs
foreach (System.Tuple <GrammarAST, string> pair in r.leftRecursiveRuleRefLabels)
{
GrammarAST idAST = pair.Item1;
string altLabel = pair.Item2;
string label = idAST.Text;
GrammarAST rrefAST = (GrammarAST)idAST.Parent.GetChild(1);
if (rrefAST.Type == ANTLRParser.RULE_REF)
{
Rule targetRule = factory.GetGrammar().GetRule(rrefAST.Text);
string ctxName = factory.GetTarget().GetRuleFunctionContextStructName(targetRule);
RuleContextDecl d;
if (idAST.Parent.Type == ANTLRParser.ASSIGN)
{
d = new RuleContextDecl(factory, label, ctxName);
}
else
{
d = new RuleContextListDecl(factory, label, ctxName);
}
StructDecl @struct = ruleCtx;
if (altLabelCtxs != null)
{
AltLabelStructDecl s;
if (altLabel != null && altLabelCtxs.TryGetValue(altLabel, out s) && s != null)
{
@struct = s; // if alt label, use subctx
}
}
@struct.AddDecl(d); // stick in overall rule's ctx
}
}
}
public virtual void AddContextGetters(OutputModelFactory factory, ICollection <RuleAST> contextASTs)
{
IList <AltAST> unlabeledAlternatives = new List <AltAST>();
IDictionary <string, IList <AltAST> > labeledAlternatives = new Dictionary <string, IList <AltAST> >();
foreach (RuleAST ast in contextASTs)
{
try
{
foreach (var altAst in rule.g.GetUnlabeledAlternatives(ast))
{
unlabeledAlternatives.Add(altAst);
}
foreach (KeyValuePair <string, IList <System.Tuple <int, AltAST> > > entry in rule.g.GetLabeledAlternatives(ast))
{
IList <AltAST> list;
if (!labeledAlternatives.TryGetValue(entry.Key, out list))
{
list = new List <AltAST>();
labeledAlternatives[entry.Key] = list;
}
foreach (System.Tuple <int, AltAST> tuple in entry.Value)
{
list.Add(tuple.Item2);
}
}
}
catch (RecognitionException)
{
}
}
// Add ctx labels for elements in alts with no '#' label
if (unlabeledAlternatives.Count > 0)
{
ISet <Decl.Decl> decls = GetDeclsForAllElements(unlabeledAlternatives);
// put directly in base context
foreach (Decl.Decl decl in decls)
{
ruleCtx.AddDecl(decl);
}
}
// make structs for '#' labeled alts, define ctx labels for elements
altLabelCtxs = new Dictionary <string, AltLabelStructDecl>();
if (labeledAlternatives.Count > 0)
{
foreach (KeyValuePair <string, IList <AltAST> > entry in labeledAlternatives)
{
AltLabelStructDecl labelDecl = new AltLabelStructDecl(factory, rule, entry.Key);
altLabelCtxs[entry.Key] = labelDecl;
ISet <Decl.Decl> decls = GetDeclsForAllElements(entry.Value);
foreach (Decl.Decl decl in decls)
{
labelDecl.AddDecl(decl);
}
}
}
}
