#164: line for string stream

src/lib/parsec/response.js

@@ -66,6 +66,9 @@ class ParserResponse {
  *
  * flatMap is a specialization of fold
  */
+ line(){
+ return this.input.lineAt(this.getOffset())
+ }
 }
 
 /**

src/lib/stream/stream.js

@@ -11,6 +11,7 @@ import atry from '../data/try';
 /**
  * Abstract methods:
  * - unsafeGet(index)
+ * - lineAt(offset)
  */
 class Stream {
  constructor() {}
@@ -44,6 +45,8 @@ class Stream {
 
  return true;
  }
+
+ lineAt(offset){return 0}
 }
 
 export default Stream;

src/lib/stream/stringstream.js

@@ -25,6 +25,11 @@ class StringStream extends Stream {
  unsafeGet(index) {
  return this.source.charAt(index);
  }
+
+ lineAt(offset){
+ const str= this.source.substring(0, offset+1);
+ return (str.match(/\n/g) || '').length + 1
+ }
 }
 
 function factory(source) {

src/test/parsec/line-test.js

@@ -0,0 +1,61 @@
+import stream from '../../lib/stream/index';
+import {C,N} from '../../lib/parsec/index';
+
+const eol = C.char('\n')
+
+export default {
+ setUp: function (done) {
+ done();
+ },
+
+ 'expect line 1 is ok': function (test) {
+ const string = '007';
+ // tests here
+ const parser = N.integer();
+ const response = parser.parse(stream.ofString(string));
+
+ test.equal(1, response.line());
+ test.done();
+ },
+ 'expect line 2 is ok': function (test) {
+ const string = '007\n12';
+ // tests here
+ const parser = N.integer().then(eol).then(N.integer());
+ const response = parser.parse(stream.ofString(string));
+
+ test.equal(2, response.line());
+ test.done();
+ },
+ 'multiline is ok': function (test) {
+ const string = '007\n\n12';
+ // tests here
+ const parser = N.integer().then(eol).then(N.integer());
+ const response = parser.parse(stream.ofString(string));
+
+ test.equal(3, response.line());
+ test.done();
+ },
+ 'not finished parser is ok': function (test) {
+ const string = '007\nab\n12';
+ // tests here
+ const parser = N.integer().then(eol).then(N.integer());
+ const response = parser.parse(stream.ofString(string));
+
+ test.equal(2, response.line());
+ test.equal(false, response.isAccepted());
+ test.done();
+ },
+ 'first lines is ok and windows': function (test) {
+ const string = '\n007\nab\n12';
+ // tests here
+ const parser = eol.then(N.integer()).then(eol).then(N.integer());
+ const response = parser.parse(stream.ofString(string));
+
+ test.equal(3, response.line());
+ test.equal(false, response.isAccepted());
+ test.done();
+ }
+
+
+
+}

src/test/parsec/parser-package-test.js

@@ -9,6 +9,7 @@ import charsBundleTest from './chars-bundle-test';
 import numberBundleTest from './number-bundle-test';
 import fLayerTest from './f-layer-test';
 import tupleParserTest from './tuple-parser-test';
+import lineTest from './line-test';
 
 export default {
  parserChainTest,
@@ -21,5 +22,6 @@ export default {
  charsBundleTest,
  numberBundleTest,
  fLayerTest,
- tupleParserTest
+ tupleParserTest,
+ lineTest
 }