Skip to content

Migrate grammar DSL to operator-only Type‑0 model and add rewrite-rule operators #175

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Draft
Copilot wants to merge 1 commit into
base: Dev
Choose a base branch
from
Draft

Migrate grammar DSL to operator-only Type‑0 model and add rewrite-rule operators #175

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
20 changes: 1 addition & 19 deletions CSharp.CDTk/Analysis/Analysis.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -169,25 +169,7 @@ internal CategoricalSemanticDiagram Parse(string input)
// Infer a start rule: a non-token rule that is never referenced as a child
private Rule InferStartRule()
{
var all = _grammar.GetAllRules().Select(r => r.ResolvedRule).Distinct().ToList();
var allSet = new HashSet<Rule>(all);
var referenced = new HashSet<Rule>();

foreach (var rule in all)
{
var visited = new HashSet<Rule>();
CollectReferencedNamedRules(rule, allSet, referenced, visited, rule);
}

var candidate = all.FirstOrDefault(r => !referenced.Contains(r) && r.Type != Rule.RuleType.Token);
if (candidate != null)
return candidate;

candidate = all.FirstOrDefault(r => r.Type != Rule.RuleType.Token);
if (candidate != null)
return candidate;

return all.First();
return _grammar.GetStartRule().ResolvedRule;
}

// Recursively walk the rule tree and add any named rules (from allSet) found
Expand Down
Loading