public override void FinishRule(RuleAST rule, GrammarAST ID, GrammarAST block)
{
if (rule.IsLexerRule())
return;
BlockAST blk = (BlockAST)rule.GetFirstChildWithType(BLOCK);
int nalts = blk.ChildCount;
GrammarAST idAST = (GrammarAST)rule.GetChild(0);
for (int i = 0; i < nalts; i++)
{
AltAST altAST = (AltAST)blk.GetChild(i);
if (altAST.altLabel != null)
{
string altLabel = altAST.altLabel.Text;
// first check that label doesn't conflict with a rule
// label X or x can't be rule x.
Rule r;
if (ruleCollector.rules.TryGetValue(Utils.Decapitalize(altLabel), out r) && r != null)
{
g.tool.errMgr.GrammarError(ErrorType.ALT_LABEL_CONFLICTS_WITH_RULE,
g.fileName, altAST.altLabel.Token,
altLabel,
r.name);
}
// Now verify that label X or x doesn't conflict with label
// in another rule. altLabelToRuleName has both X and x mapped.
string prevRuleForLabel;
if (ruleCollector.altLabelToRuleName.TryGetValue(altLabel, out prevRuleForLabel) && prevRuleForLabel != null && !prevRuleForLabel.Equals(rule.GetRuleName()))
{
g.tool.errMgr.GrammarError(ErrorType.ALT_LABEL_REDEF,
g.fileName, altAST.altLabel.Token,
altLabel,
rule.GetRuleName(),
prevRuleForLabel);
}
}
}
IList<GrammarAST> altLabels;
int numAltLabels = 0;
if (ruleCollector.ruleToAltLabels.TryGetValue(rule.GetRuleName(), out altLabels) && altLabels != null)
numAltLabels = altLabels.Count;
if (numAltLabels > 0 && nalts != numAltLabels)
{
g.tool.errMgr.GrammarError(ErrorType.RULE_WITH_TOO_FEW_ALT_LABELS,
g.fileName, idAST.Token, rule.GetRuleName());
}
}
/**
* <pre>
* (RULE e int _p (returns int v)
* (BLOCK
* (ALT
* (BLOCK
* (ALT INT {$v = $INT.int;})
* (ALT '(' (= x e) ')' {$v = $x.v;})
* (ALT ID))
* (* (BLOCK
* (OPTIONS ...)
* (ALT {7 >= $_p}? '*' (= b e) {$v = $a.v * $b.v;})
* (ALT {6 >= $_p}? '+' (= b e) {$v = $a.v + $b.v;})
* (ALT {3 >= $_p}? '++') (ALT {2 >= $_p}? '--'))))))
* </pre>
*/
public virtual void SetAltASTPointers(LeftRecursiveRule r, RuleAST t)
{
//System.Console.WriteLine("RULE: " + t.ToStringTree());
BlockAST ruleBlk = (BlockAST)t.GetFirstChildWithType(ANTLRParser.BLOCK);
AltAST mainAlt = (AltAST)ruleBlk.GetChild(0);
BlockAST primaryBlk = (BlockAST)mainAlt.GetChild(0);
BlockAST opsBlk = (BlockAST)mainAlt.GetChild(1).GetChild(0); // (* BLOCK ...)
for (int i = 0; i < r.recPrimaryAlts.Count; i++)
{
LeftRecursiveRuleAltInfo altInfo = r.recPrimaryAlts[i];
altInfo.altAST = (AltAST)primaryBlk.GetChild(i);
altInfo.altAST.leftRecursiveAltInfo = altInfo;
altInfo.originalAltAST.leftRecursiveAltInfo = altInfo;
//altInfo.originalAltAST.Parent = altInfo.altAST.Parent;
//System.Console.WriteLine(altInfo.altAST.ToStringTree());
}
for (int i = 0; i < r.recOpAlts.Count; i++)
{
LeftRecursiveRuleAltInfo altInfo = r.recOpAlts.GetElement(i);
altInfo.altAST = (AltAST)opsBlk.GetChild(i);
altInfo.altAST.leftRecursiveAltInfo = altInfo;
altInfo.originalAltAST.leftRecursiveAltInfo = altInfo;
//altInfo.originalAltAST.Parent = altInfo.altAST.Parent;
//System.Console.WriteLine(altInfo.altAST.ToStringTree());
}
}
