Start matching {braces} and nested braces

notcl.js

@@ -21,8 +21,40 @@ var Notcl = (() => {
     text: word,
   }));
 
+  // WIP, need to be able to escape braces correctly
+  // WIP, error if anything after closing brace
+  const BracePattern = Peg.Map(
+    Peg.Sequence(
+      Peg.Regex(/\{/y),
+      Peg.AtLeast(
+        0,
+        Peg.Choose(
+          Peg.Map(Brace, (text) => `{${text}}`),
+          Peg.Map(Peg.Regex(/[^{}]+/y), ([text]) => text)
+        )
+      ),
+      Peg.Regex(/\}/y)
+    ),
+    ([_left, fragments, _right]) => fragments.join("")
+  );
+  /**
+   * @type {Peg.Pattern<string>}
+   */
+  function Brace(source, index) {
+    // Thunk to allow Brace to recurse
+    return BracePattern(source, index);
+  }
+
   const Word = Peg.Map(
-    Peg.Sequence(PreWordWhitespace, BasicWord),
+    Peg.Sequence(
+      PreWordWhitespace,
+      Peg.Choose(
+        Peg.Map(BracePattern, (text) => ({
+          text,
+        })),
+        BasicWord
+      )
+    ),
     ([_, word]) => word
   );