/**
* Important enough to avoid multiple definitions that we do very early,
* right after AST construction. Also check for undefined rules in
* parser/lexer to avoid exceptions later. Return true if we find multiple
* definitions of the same rule or a reference to an undefined rule or
* parser rule ref in lexer rule.
*/
public virtual bool CheckForRuleIssues(Grammar g)
{
// check for redefined rules
GrammarAST RULES = (GrammarAST)g.ast.GetFirstChildWithType(ANTLRParser.RULES);
IList <GrammarAST> rules = new List <GrammarAST>(RULES.GetAllChildrenWithType(ANTLRParser.RULE));
foreach (GrammarAST mode in g.ast.GetAllChildrenWithType(ANTLRParser.MODE))
{
foreach (GrammarAST child in mode.GetAllChildrenWithType(ANTLRParser.RULE))
{
rules.Add(child);
}
}
bool redefinition = false;
IDictionary <string, RuleAST> ruleToAST = new Dictionary <string, RuleAST>();
foreach (GrammarAST r in rules)
{
RuleAST ruleAST = (RuleAST)r;
GrammarAST ID = (GrammarAST)ruleAST.GetChild(0);
string ruleName = ID.Text;
RuleAST prev;
if (ruleToAST.TryGetValue(ruleName, out prev) && prev != null)
{
GrammarAST prevChild = (GrammarAST)prev.GetChild(0);
g.tool.errMgr.GrammarError(ErrorType.RULE_REDEFINITION,
g.fileName,
ID.Token,
ruleName,
prevChild.Token.Line);
redefinition = true;
continue;
}
ruleToAST[ruleName] = ruleAST;
}
// check for undefined rules
UndefChecker chk = new UndefChecker(this, g, ruleToAST);
chk.VisitGrammar(g.ast);
return(redefinition || chk.badref);
}
/**
* Important enough to avoid multiple definitions that we do very early,
* right after AST construction. Also check for undefined rules in
* parser/lexer to avoid exceptions later. Return true if we find multiple
* definitions of the same rule or a reference to an undefined rule or
* parser rule ref in lexer rule.
*/
public virtual bool CheckForRuleIssues(Grammar g)
{
// check for redefined rules
GrammarAST RULES = (GrammarAST)g.ast.GetFirstChildWithType(ANTLRParser.RULES);
IList<GrammarAST> rules = new List<GrammarAST>(RULES.GetAllChildrenWithType(ANTLRParser.RULE));
foreach (GrammarAST mode in g.ast.GetAllChildrenWithType(ANTLRParser.MODE))
{
foreach (GrammarAST child in mode.GetAllChildrenWithType(ANTLRParser.RULE))
rules.Add(child);
}
bool redefinition = false;
IDictionary<string, RuleAST> ruleToAST = new Dictionary<string, RuleAST>();
foreach (GrammarAST r in rules)
{
RuleAST ruleAST = (RuleAST)r;
GrammarAST ID = (GrammarAST)ruleAST.GetChild(0);
string ruleName = ID.Text;
RuleAST prev;
if (ruleToAST.TryGetValue(ruleName, out prev) && prev != null)
{
GrammarAST prevChild = (GrammarAST)prev.GetChild(0);
g.tool.errMgr.GrammarError(ErrorType.RULE_REDEFINITION,
g.fileName,
ID.Token,
ruleName,
prevChild.Token.Line);
redefinition = true;
continue;
}
ruleToAST[ruleName] = ruleAST;
}
// check for undefined rules
UndefChecker chk = new UndefChecker(this, g, ruleToAST);
chk.VisitGrammar(g.ast);
return redefinition || chk.badref;
}
