fe350948-1b8a-4ace-9331-a18394309013

Committed 01 Aug 2024 11:39AM UTC coverage: 96.748% (+0.5%) from 96.234%

Build # fe350948-1b8a-4ace-9331-a18394309013

Build Type

push

circleci

Committed by

peterjwest

Commit Message

Add snippet config

Run Details

217 of 226 branches covered (96.02%)

Branch coverage included in aggregate %.

735 of 758 relevant lines covered (96.97%)

131.39 hits per line

Source File
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66.67

/src/parse.ts

import lodash from 'lodash';

import { Token } from './tokens';
import DocumentNode from './DocumentNode';
import MapNode from './MapNode';
import ListNode from './ListNode';

/** Parse a yason string and return node graph for the data */
export default function parse(tokens: Token[]) {
  const document = new DocumentNode();
  const stack: Array<DocumentNode | MapNode | ListNode> = [document];
  let startIndex = 0;
  let endIndex = 0;
  while (startIndex < tokens.length || stack.length) {
    const currentTokens = tokens.slice(startIndex, endIndex + 1);

    const current = lodash.last(stack);

    if (!current) {
      // TODO: Better error message
      throw Error('Stack empty');
    }

    // TODO: Remove
    // console.log(current.constructor.name, current.state, currentTokens);

    const response = current.runNextAction(currentTokens, document.indent);

    if (response) {
      if (response.result.indent) document.indent = response.result.indent;
      if (response.result.pop) stack.pop();
      if (response.result.push) stack.push(response.result.push);
      if (response.result.consumed !== undefined) {
        if (response.length && response.result.consumed > response.length) {
          throw Error(
            `Parse error in ${current.constructor.name} ${current.state},` +
            `attempted to consume more tokens (${response.result.consumed}) than available (${response.length})`,
          );
        }
        startIndex = startIndex + response.result.consumed || 0;
      }
      if (startIndex > endIndex) endIndex++;
    } else {
      // TODO: Better error message
      if (currentTokens.length >= current.matchableTokens()) {
        throw Error(
          `Parse error in ${current.constructor.name} ${current.state}: ` +
          `'${JSON.stringify(currentTokens)}'`,
        );
      }
      endIndex++;
    }

    if (endIndex > tokens.length) {
      throw Error(
        `Parse error in ${current.constructor.name} ${current.state}, unexpected end of document`,
      );
    }
  }

  return document;
}

1	import lodash from 'lodash';	1✔
2
3	import { Token } from './tokens';
4	import DocumentNode from './DocumentNode';	1✔
5	import MapNode from './MapNode';
6	import ListNode from './ListNode';
7
8	/** Parse a yason string and return node graph for the data */
9	export default function parse(tokens: Token[]) {	21✔
10	const document = new DocumentNode();	21✔
11	const stack: Array<DocumentNode \| MapNode \| ListNode> = [document];	21✔
12	let startIndex = 0;	21✔
13	let endIndex = 0;	21✔
14	while (startIndex < tokens.length \|\| stack.length) {	21✔
15	const currentTokens = tokens.slice(startIndex, endIndex + 1);	580✔
16
17	const current = lodash.last(stack);	580✔
18
19	if (!current) {	580!
20	// TODO: Better error message
21	throw Error('Stack empty');	×
22	}	×
23
24	// TODO: Remove
25	// console.log(current.constructor.name, current.state, currentTokens);
26
27	const response = current.runNextAction(currentTokens, document.indent);	580✔
28
29	if (response) {	580✔
30	if (response.result.indent) document.indent = response.result.indent;	439✔
31	if (response.result.pop) stack.pop();	439✔
32	if (response.result.push) stack.push(response.result.push);	439✔
33	if (response.result.consumed !== undefined) {	439✔
34	if (response.length && response.result.consumed > response.length) {	301!
35	throw Error(	×
36	`Parse error in ${current.constructor.name} ${current.state},` +	×
37	`attempted to consume more tokens (${response.result.consumed}) than available (${response.length})`,	×
38	);	×
39	}	×
40	startIndex = startIndex + response.result.consumed \|\| 0;	301✔
41	}	301✔
42	if (startIndex > endIndex) endIndex++;	439✔
43	} else {	580✔
44	// TODO: Better error message
45	if (currentTokens.length >= current.matchableTokens()) {	141!
46	throw Error(	×
47	`Parse error in ${current.constructor.name} ${current.state}: ` +	×
48	`'${JSON.stringify(currentTokens)}'`,	×
49	);	×
50	}	×
51	endIndex++;	141✔
52	}	141✔
53
54	if (endIndex > tokens.length) {	580!
55	throw Error(	×
56	`Parse error in ${current.constructor.name} ${current.state}, unexpected end of document`,	×
57	);	×
58	}	×
59	}	580✔
60
61	return document;	21✔
62	}	21✔

peterjwest / yason / fe350948-1b8a-4ace-9331-a18394309013

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