adds #many plus unit test

animatedlew · Mar 25, 2016 · 70ed809 · 70ed809
1 parent 35021fe
commit 70ed809
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Showing 3 changed files with 11 additions and 2 deletions.
diff --git a/gulpfile.js b/gulpfile.js
@@ -4,7 +4,7 @@ const mocha = require('gulp-mocha');
 const shell = require('gulp-shell');
 
 gulp.task('test', ['build'], () => gulp.src('test/**/*.js', { read: false }).pipe(mocha({ reporter: 'spec' })));
-gulp.task('build', () => gulp.src('./parser.ts').pipe(shell(['tsc -p .'])));
-gulp.task('run', ['build'], () => gulp.src('./parser.js').pipe(shell(['node <%= file.path %>'])));
+gulp.task('build', () => gulp.src('./src/parser.ts').pipe(shell(['tsc -p .'])));
+gulp.task('run', ['build'], () => gulp.src('./src/parser.js').pipe(shell(['node <%= file.path %>'])));
 gulp.task('default', ['run', 'test'], () => {});
 
diff --git a/src/parser.ts b/src/parser.ts
@@ -62,5 +62,8 @@ export default class Parser<T> {
             Parser.unit("")
         );
     }
+    static many(p: Parser<string>): Parser<string> {
+        return Parser.plus(Parser.bind(p, x => Parser.bind(Parser.many(p), xs => Parser.unit(x + xs))), Parser.unit(""));
+    }
     apply = (input: string): Result<T>[] => this.f(input);
 }
diff --git a/test/parserSpec.ts b/test/parserSpec.ts
@@ -221,4 +221,10 @@ describe("Parser", () => {
             expect(Parser.string(phrase).apply("dog")).to.have.deep.property("0.lexeme", "dog");
         });
     });
+    describe("#many", () => {
+        it("should parse a sequence of items", () => {
+            expect(Parser.many(Parser.char("a")).apply("aaaaabbb")).to.have.deep.property("0.lexeme", "aaaaa");
+            expect(Parser.many(Parser.char("b")).apply("bbaaa")).to.have.deep.property("0.lexeme", "bb");
+        });
+    });
 });