Introduce recognizers

src/parser.experiments.ts

@@ -1,5 +1,6 @@
-import { sourceText } from 'source-region';
+import { CodePointString, sourceText } from 'source-region';
 import { parseDocument } from './parser';
+import { matchCodePointString } from './recognizers';
 import { Expr } from './syntax';
 
 // === Experiments ===
@@ -32,6 +33,15 @@ function experiment06_unicodeSpans(): void {
   logParse("unicode spans", "alpha 💥 (beta 2)");
 }
 
+function experiment07_matchCodePointString(): void {
+  const region = sourceText("λx").fullRegion();
+  const cursor = region.makeCursor();
+  const lambda = CodePointString.makeFromString("λ");
+  console.log("==== recognizer:match code point string ====");
+  console.dir(matchCodePointString(cursor, lambda), { depth: null });
+  console.log("cursor", cursor.current());
+}
+
 function logParse(name: string, input: string): void {
   const region = sourceText(input).fullRegion();
   const result = parseDocument(region);
@@ -49,4 +59,5 @@ function logParse(name: string, input: string): void {
   experiment04_recoverAtDocumentLevel,
   experiment05_recoverInsideList,
   experiment06_unicodeSpans,
+  experiment07_matchCodePointString,
 ].forEach((experiment) => experiment());