3 /*eslint-disable max-len,no-use-before-define*/
5 var common = require('./common');
6 var YAMLException = require('./exception');
7 var Mark = require('./mark');
8 var DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');
9 var DEFAULT_FULL_SCHEMA = require('./schema/default_full');
12 var _hasOwnProperty = Object.prototype.hasOwnProperty;
15 var CONTEXT_FLOW_IN = 1;
16 var CONTEXT_FLOW_OUT = 2;
17 var CONTEXT_BLOCK_IN = 3;
18 var CONTEXT_BLOCK_OUT = 4;
21 var CHOMPING_CLIP = 1;
22 var CHOMPING_STRIP = 2;
23 var CHOMPING_KEEP = 3;
26 var PATTERN_NON_PRINTABLE = /[\x00-\x08\x0B\x0C\x0E-\x1F\x7F-\x84\x86-\x9F\uFFFE\uFFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/;
27 var PATTERN_NON_ASCII_LINE_BREAKS = /[\x85\u2028\u2029]/;
28 var PATTERN_FLOW_INDICATORS = /[,\[\]\{\}]/;
29 var PATTERN_TAG_HANDLE = /^(?:!|!!|![a-z\-]+!)$/i;
30 var PATTERN_TAG_URI = /^(?:!|[^,\[\]\{\}])(?:%[0-9a-f]{2}|[0-9a-z\-#;\/\?:@&=\+\$,_\.!~\*'\(\)\[\]])*$/i;
33 function _class(obj) { return Object.prototype.toString.call(obj); }
36 return (c === 0x0A/* LF */) || (c === 0x0D/* CR */);
39 function is_WHITE_SPACE(c) {
40 return (c === 0x09/* Tab */) || (c === 0x20/* Space */);
43 function is_WS_OR_EOL(c) {
44 return (c === 0x09/* Tab */) ||
45 (c === 0x20/* Space */) ||
46 (c === 0x0A/* LF */) ||
50 function is_FLOW_INDICATOR(c) {
51 return c === 0x2C/* , */ ||
58 function fromHexCode(c) {
61 if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {
65 /*eslint-disable no-bitwise*/
68 if ((0x61/* a */ <= lc) && (lc <= 0x66/* f */)) {
69 return lc - 0x61 + 10;
75 function escapedHexLen(c) {
76 if (c === 0x78/* x */) { return 2; }
77 if (c === 0x75/* u */) { return 4; }
78 if (c === 0x55/* U */) { return 8; }
82 function fromDecimalCode(c) {
83 if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {
90 function simpleEscapeSequence(c) {
91 /* eslint-disable indent */
92 return (c === 0x30/* 0 */) ? '\x00' :
93 (c === 0x61/* a */) ? '\x07' :
94 (c === 0x62/* b */) ? '\x08' :
95 (c === 0x74/* t */) ? '\x09' :
96 (c === 0x09/* Tab */) ? '\x09' :
97 (c === 0x6E/* n */) ? '\x0A' :
98 (c === 0x76/* v */) ? '\x0B' :
99 (c === 0x66/* f */) ? '\x0C' :
100 (c === 0x72/* r */) ? '\x0D' :
101 (c === 0x65/* e */) ? '\x1B' :
102 (c === 0x20/* Space */) ? ' ' :
103 (c === 0x22/* " */) ? '\x22' :
104 (c === 0x2F/* / */) ? '/' :
105 (c === 0x5C/* \ */) ? '\x5C' :
106 (c === 0x4E/* N */) ? '\x85' :
107 (c === 0x5F/* _ */) ? '\xA0' :
108 (c === 0x4C/* L */) ? '\u2028' :
109 (c === 0x50/* P */) ? '\u2029' : '';
112 function charFromCodepoint(c) {
114 return String.fromCharCode(c);
116 // Encode UTF-16 surrogate pair
117 // https://en.wikipedia.org/wiki/UTF-16#Code_points_U.2B010000_to_U.2B10FFFF
118 return String.fromCharCode(
119 ((c - 0x010000) >> 10) + 0xD800,
120 ((c - 0x010000) & 0x03FF) + 0xDC00
124 var simpleEscapeCheck = new Array(256); // integer, for fast access
125 var simpleEscapeMap = new Array(256);
126 for (var i = 0; i < 256; i++) {
127 simpleEscapeCheck[i] = simpleEscapeSequence(i) ? 1 : 0;
128 simpleEscapeMap[i] = simpleEscapeSequence(i);
132 function State(input, options) {
135 this.filename = options['filename'] || null;
136 this.schema = options['schema'] || DEFAULT_FULL_SCHEMA;
137 this.onWarning = options['onWarning'] || null;
138 this.legacy = options['legacy'] || false;
139 this.json = options['json'] || false;
140 this.listener = options['listener'] || null;
142 this.implicitTypes = this.schema.compiledImplicit;
143 this.typeMap = this.schema.compiledTypeMap;
145 this.length = input.length;
155 this.checkLineBreaks;
166 function generateError(state, message) {
167 return new YAMLException(
169 new Mark(state.filename, state.input, state.position, state.line, (state.position - state.lineStart)));
172 function throwError(state, message) {
173 throw generateError(state, message);
176 function throwWarning(state, message) {
177 if (state.onWarning) {
178 state.onWarning.call(null, generateError(state, message));
183 var directiveHandlers = {
185 YAML: function handleYamlDirective(state, name, args) {
187 var match, major, minor;
189 if (state.version !== null) {
190 throwError(state, 'duplication of %YAML directive');
193 if (args.length !== 1) {
194 throwError(state, 'YAML directive accepts exactly one argument');
197 match = /^([0-9]+)\.([0-9]+)$/.exec(args[0]);
199 if (match === null) {
200 throwError(state, 'ill-formed argument of the YAML directive');
203 major = parseInt(match[1], 10);
204 minor = parseInt(match[2], 10);
207 throwError(state, 'unacceptable YAML version of the document');
210 state.version = args[0];
211 state.checkLineBreaks = (minor < 2);
213 if (minor !== 1 && minor !== 2) {
214 throwWarning(state, 'unsupported YAML version of the document');
218 TAG: function handleTagDirective(state, name, args) {
222 if (args.length !== 2) {
223 throwError(state, 'TAG directive accepts exactly two arguments');
229 if (!PATTERN_TAG_HANDLE.test(handle)) {
230 throwError(state, 'ill-formed tag handle (first argument) of the TAG directive');
233 if (_hasOwnProperty.call(state.tagMap, handle)) {
234 throwError(state, 'there is a previously declared suffix for "' + handle + '" tag handle');
237 if (!PATTERN_TAG_URI.test(prefix)) {
238 throwError(state, 'ill-formed tag prefix (second argument) of the TAG directive');
241 state.tagMap[handle] = prefix;
246 function captureSegment(state, start, end, checkJson) {
247 var _position, _length, _character, _result;
250 _result = state.input.slice(start, end);
253 for (_position = 0, _length = _result.length; _position < _length; _position += 1) {
254 _character = _result.charCodeAt(_position);
255 if (!(_character === 0x09 ||
256 (0x20 <= _character && _character <= 0x10FFFF))) {
257 throwError(state, 'expected valid JSON character');
260 } else if (PATTERN_NON_PRINTABLE.test(_result)) {
261 throwError(state, 'the stream contains non-printable characters');
264 state.result += _result;
268 function mergeMappings(state, destination, source, overridableKeys) {
269 var sourceKeys, key, index, quantity;
271 if (!common.isObject(source)) {
272 throwError(state, 'cannot merge mappings; the provided source object is unacceptable');
275 sourceKeys = Object.keys(source);
277 for (index = 0, quantity = sourceKeys.length; index < quantity; index += 1) {
278 key = sourceKeys[index];
280 if (!_hasOwnProperty.call(destination, key)) {
281 destination[key] = source[key];
282 overridableKeys[key] = true;
287 function storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode, startLine, startPos) {
290 // The output is a plain object here, so keys can only be strings.
291 // We need to convert keyNode to a string, but doing so can hang the process
292 // (deeply nested arrays that explode exponentially using aliases).
293 if (Array.isArray(keyNode)) {
294 keyNode = Array.prototype.slice.call(keyNode);
296 for (index = 0, quantity = keyNode.length; index < quantity; index += 1) {
297 if (Array.isArray(keyNode[index])) {
298 throwError(state, 'nested arrays are not supported inside keys');
301 if (typeof keyNode === 'object' && _class(keyNode[index]) === '[object Object]') {
302 keyNode[index] = '[object Object]';
307 // Avoid code execution in load() via toString property
308 // (still use its own toString for arrays, timestamps,
309 // and whatever user schema extensions happen to have @@toStringTag)
310 if (typeof keyNode === 'object' && _class(keyNode) === '[object Object]') {
311 keyNode = '[object Object]';
315 keyNode = String(keyNode);
317 if (_result === null) {
321 if (keyTag === 'tag:yaml.org,2002:merge') {
322 if (Array.isArray(valueNode)) {
323 for (index = 0, quantity = valueNode.length; index < quantity; index += 1) {
324 mergeMappings(state, _result, valueNode[index], overridableKeys);
327 mergeMappings(state, _result, valueNode, overridableKeys);
331 !_hasOwnProperty.call(overridableKeys, keyNode) &&
332 _hasOwnProperty.call(_result, keyNode)) {
333 state.line = startLine || state.line;
334 state.position = startPos || state.position;
335 throwError(state, 'duplicated mapping key');
337 _result[keyNode] = valueNode;
338 delete overridableKeys[keyNode];
344 function readLineBreak(state) {
347 ch = state.input.charCodeAt(state.position);
349 if (ch === 0x0A/* LF */) {
351 } else if (ch === 0x0D/* CR */) {
353 if (state.input.charCodeAt(state.position) === 0x0A/* LF */) {
357 throwError(state, 'a line break is expected');
361 state.lineStart = state.position;
364 function skipSeparationSpace(state, allowComments, checkIndent) {
366 ch = state.input.charCodeAt(state.position);
369 while (is_WHITE_SPACE(ch)) {
370 ch = state.input.charCodeAt(++state.position);
373 if (allowComments && ch === 0x23/* # */) {
375 ch = state.input.charCodeAt(++state.position);
376 } while (ch !== 0x0A/* LF */ && ch !== 0x0D/* CR */ && ch !== 0);
380 readLineBreak(state);
382 ch = state.input.charCodeAt(state.position);
384 state.lineIndent = 0;
386 while (ch === 0x20/* Space */) {
388 ch = state.input.charCodeAt(++state.position);
395 if (checkIndent !== -1 && lineBreaks !== 0 && state.lineIndent < checkIndent) {
396 throwWarning(state, 'deficient indentation');
402 function testDocumentSeparator(state) {
403 var _position = state.position,
406 ch = state.input.charCodeAt(_position);
408 // Condition state.position === state.lineStart is tested
409 // in parent on each call, for efficiency. No needs to test here again.
410 if ((ch === 0x2D/* - */ || ch === 0x2E/* . */) &&
411 ch === state.input.charCodeAt(_position + 1) &&
412 ch === state.input.charCodeAt(_position + 2)) {
416 ch = state.input.charCodeAt(_position);
418 if (ch === 0 || is_WS_OR_EOL(ch)) {
426 function writeFoldedLines(state, count) {
429 } else if (count > 1) {
430 state.result += common.repeat('\n', count - 1);
435 function readPlainScalar(state, nodeIndent, withinFlowCollection) {
445 _result = state.result,
448 ch = state.input.charCodeAt(state.position);
450 if (is_WS_OR_EOL(ch) ||
451 is_FLOW_INDICATOR(ch) ||
452 ch === 0x23/* # */ ||
453 ch === 0x26/* & */ ||
454 ch === 0x2A/* * */ ||
455 ch === 0x21/* ! */ ||
456 ch === 0x7C/* | */ ||
457 ch === 0x3E/* > */ ||
458 ch === 0x27/* ' */ ||
459 ch === 0x22/* " */ ||
460 ch === 0x25/* % */ ||
461 ch === 0x40/* @ */ ||
462 ch === 0x60/* ` */) {
466 if (ch === 0x3F/* ? */ || ch === 0x2D/* - */) {
467 following = state.input.charCodeAt(state.position + 1);
469 if (is_WS_OR_EOL(following) ||
470 withinFlowCollection && is_FLOW_INDICATOR(following)) {
475 state.kind = 'scalar';
477 captureStart = captureEnd = state.position;
478 hasPendingContent = false;
481 if (ch === 0x3A/* : */) {
482 following = state.input.charCodeAt(state.position + 1);
484 if (is_WS_OR_EOL(following) ||
485 withinFlowCollection && is_FLOW_INDICATOR(following)) {
489 } else if (ch === 0x23/* # */) {
490 preceding = state.input.charCodeAt(state.position - 1);
492 if (is_WS_OR_EOL(preceding)) {
496 } else if ((state.position === state.lineStart && testDocumentSeparator(state)) ||
497 withinFlowCollection && is_FLOW_INDICATOR(ch)) {
500 } else if (is_EOL(ch)) {
502 _lineStart = state.lineStart;
503 _lineIndent = state.lineIndent;
504 skipSeparationSpace(state, false, -1);
506 if (state.lineIndent >= nodeIndent) {
507 hasPendingContent = true;
508 ch = state.input.charCodeAt(state.position);
511 state.position = captureEnd;
513 state.lineStart = _lineStart;
514 state.lineIndent = _lineIndent;
519 if (hasPendingContent) {
520 captureSegment(state, captureStart, captureEnd, false);
521 writeFoldedLines(state, state.line - _line);
522 captureStart = captureEnd = state.position;
523 hasPendingContent = false;
526 if (!is_WHITE_SPACE(ch)) {
527 captureEnd = state.position + 1;
530 ch = state.input.charCodeAt(++state.position);
533 captureSegment(state, captureStart, captureEnd, false);
540 state.result = _result;
544 function readSingleQuotedScalar(state, nodeIndent) {
546 captureStart, captureEnd;
548 ch = state.input.charCodeAt(state.position);
550 if (ch !== 0x27/* ' */) {
554 state.kind = 'scalar';
557 captureStart = captureEnd = state.position;
559 while ((ch = state.input.charCodeAt(state.position)) !== 0) {
560 if (ch === 0x27/* ' */) {
561 captureSegment(state, captureStart, state.position, true);
562 ch = state.input.charCodeAt(++state.position);
564 if (ch === 0x27/* ' */) {
565 captureStart = state.position;
567 captureEnd = state.position;
572 } else if (is_EOL(ch)) {
573 captureSegment(state, captureStart, captureEnd, true);
574 writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));
575 captureStart = captureEnd = state.position;
577 } else if (state.position === state.lineStart && testDocumentSeparator(state)) {
578 throwError(state, 'unexpected end of the document within a single quoted scalar');
582 captureEnd = state.position;
586 throwError(state, 'unexpected end of the stream within a single quoted scalar');
589 function readDoubleQuotedScalar(state, nodeIndent) {
597 ch = state.input.charCodeAt(state.position);
599 if (ch !== 0x22/* " */) {
603 state.kind = 'scalar';
606 captureStart = captureEnd = state.position;
608 while ((ch = state.input.charCodeAt(state.position)) !== 0) {
609 if (ch === 0x22/* " */) {
610 captureSegment(state, captureStart, state.position, true);
614 } else if (ch === 0x5C/* \ */) {
615 captureSegment(state, captureStart, state.position, true);
616 ch = state.input.charCodeAt(++state.position);
619 skipSeparationSpace(state, false, nodeIndent);
621 // TODO: rework to inline fn with no type cast?
622 } else if (ch < 256 && simpleEscapeCheck[ch]) {
623 state.result += simpleEscapeMap[ch];
626 } else if ((tmp = escapedHexLen(ch)) > 0) {
630 for (; hexLength > 0; hexLength--) {
631 ch = state.input.charCodeAt(++state.position);
633 if ((tmp = fromHexCode(ch)) >= 0) {
634 hexResult = (hexResult << 4) + tmp;
637 throwError(state, 'expected hexadecimal character');
641 state.result += charFromCodepoint(hexResult);
646 throwError(state, 'unknown escape sequence');
649 captureStart = captureEnd = state.position;
651 } else if (is_EOL(ch)) {
652 captureSegment(state, captureStart, captureEnd, true);
653 writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));
654 captureStart = captureEnd = state.position;
656 } else if (state.position === state.lineStart && testDocumentSeparator(state)) {
657 throwError(state, 'unexpected end of the document within a double quoted scalar');
661 captureEnd = state.position;
665 throwError(state, 'unexpected end of the stream within a double quoted scalar');
668 function readFlowCollection(state, nodeIndent) {
673 _anchor = state.anchor,
679 overridableKeys = {},
685 ch = state.input.charCodeAt(state.position);
687 if (ch === 0x5B/* [ */) {
688 terminator = 0x5D;/* ] */
691 } else if (ch === 0x7B/* { */) {
692 terminator = 0x7D;/* } */
699 if (state.anchor !== null) {
700 state.anchorMap[state.anchor] = _result;
703 ch = state.input.charCodeAt(++state.position);
706 skipSeparationSpace(state, true, nodeIndent);
708 ch = state.input.charCodeAt(state.position);
710 if (ch === terminator) {
713 state.anchor = _anchor;
714 state.kind = isMapping ? 'mapping' : 'sequence';
715 state.result = _result;
717 } else if (!readNext) {
718 throwError(state, 'missed comma between flow collection entries');
721 keyTag = keyNode = valueNode = null;
722 isPair = isExplicitPair = false;
724 if (ch === 0x3F/* ? */) {
725 following = state.input.charCodeAt(state.position + 1);
727 if (is_WS_OR_EOL(following)) {
728 isPair = isExplicitPair = true;
730 skipSeparationSpace(state, true, nodeIndent);
735 composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);
737 keyNode = state.result;
738 skipSeparationSpace(state, true, nodeIndent);
740 ch = state.input.charCodeAt(state.position);
742 if ((isExplicitPair || state.line === _line) && ch === 0x3A/* : */) {
744 ch = state.input.charCodeAt(++state.position);
745 skipSeparationSpace(state, true, nodeIndent);
746 composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);
747 valueNode = state.result;
751 storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode);
753 _result.push(storeMappingPair(state, null, overridableKeys, keyTag, keyNode, valueNode));
755 _result.push(keyNode);
758 skipSeparationSpace(state, true, nodeIndent);
760 ch = state.input.charCodeAt(state.position);
762 if (ch === 0x2C/* , */) {
764 ch = state.input.charCodeAt(++state.position);
770 throwError(state, 'unexpected end of the stream within a flow collection');
773 function readBlockScalar(state, nodeIndent) {
776 chomping = CHOMPING_CLIP,
777 didReadContent = false,
778 detectedIndent = false,
779 textIndent = nodeIndent,
781 atMoreIndented = false,
785 ch = state.input.charCodeAt(state.position);
787 if (ch === 0x7C/* | */) {
789 } else if (ch === 0x3E/* > */) {
795 state.kind = 'scalar';
799 ch = state.input.charCodeAt(++state.position);
801 if (ch === 0x2B/* + */ || ch === 0x2D/* - */) {
802 if (CHOMPING_CLIP === chomping) {
803 chomping = (ch === 0x2B/* + */) ? CHOMPING_KEEP : CHOMPING_STRIP;
805 throwError(state, 'repeat of a chomping mode identifier');
808 } else if ((tmp = fromDecimalCode(ch)) >= 0) {
810 throwError(state, 'bad explicit indentation width of a block scalar; it cannot be less than one');
811 } else if (!detectedIndent) {
812 textIndent = nodeIndent + tmp - 1;
813 detectedIndent = true;
815 throwError(state, 'repeat of an indentation width identifier');
823 if (is_WHITE_SPACE(ch)) {
824 do { ch = state.input.charCodeAt(++state.position); }
825 while (is_WHITE_SPACE(ch));
827 if (ch === 0x23/* # */) {
828 do { ch = state.input.charCodeAt(++state.position); }
829 while (!is_EOL(ch) && (ch !== 0));
834 readLineBreak(state);
835 state.lineIndent = 0;
837 ch = state.input.charCodeAt(state.position);
839 while ((!detectedIndent || state.lineIndent < textIndent) &&
840 (ch === 0x20/* Space */)) {
842 ch = state.input.charCodeAt(++state.position);
845 if (!detectedIndent && state.lineIndent > textIndent) {
846 textIndent = state.lineIndent;
854 // End of the scalar.
855 if (state.lineIndent < textIndent) {
857 // Perform the chomping.
858 if (chomping === CHOMPING_KEEP) {
859 state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
860 } else if (chomping === CHOMPING_CLIP) {
861 if (didReadContent) { // i.e. only if the scalar is not empty.
862 state.result += '\n';
866 // Break this `while` cycle and go to the funciton's epilogue.
870 // Folded style: use fancy rules to handle line breaks.
873 // Lines starting with white space characters (more-indented lines) are not folded.
874 if (is_WHITE_SPACE(ch)) {
875 atMoreIndented = true;
876 // except for the first content line (cf. Example 8.1)
877 state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
879 // End of more-indented block.
880 } else if (atMoreIndented) {
881 atMoreIndented = false;
882 state.result += common.repeat('\n', emptyLines + 1);
884 // Just one line break - perceive as the same line.
885 } else if (emptyLines === 0) {
886 if (didReadContent) { // i.e. only if we have already read some scalar content.
890 // Several line breaks - perceive as different lines.
892 state.result += common.repeat('\n', emptyLines);
895 // Literal style: just add exact number of line breaks between content lines.
897 // Keep all line breaks except the header line break.
898 state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
901 didReadContent = true;
902 detectedIndent = true;
904 captureStart = state.position;
906 while (!is_EOL(ch) && (ch !== 0)) {
907 ch = state.input.charCodeAt(++state.position);
910 captureSegment(state, captureStart, state.position, false);
916 function readBlockSequence(state, nodeIndent) {
919 _anchor = state.anchor,
925 if (state.anchor !== null) {
926 state.anchorMap[state.anchor] = _result;
929 ch = state.input.charCodeAt(state.position);
933 if (ch !== 0x2D/* - */) {
937 following = state.input.charCodeAt(state.position + 1);
939 if (!is_WS_OR_EOL(following)) {
946 if (skipSeparationSpace(state, true, -1)) {
947 if (state.lineIndent <= nodeIndent) {
949 ch = state.input.charCodeAt(state.position);
955 composeNode(state, nodeIndent, CONTEXT_BLOCK_IN, false, true);
956 _result.push(state.result);
957 skipSeparationSpace(state, true, -1);
959 ch = state.input.charCodeAt(state.position);
961 if ((state.line === _line || state.lineIndent > nodeIndent) && (ch !== 0)) {
962 throwError(state, 'bad indentation of a sequence entry');
963 } else if (state.lineIndent < nodeIndent) {
970 state.anchor = _anchor;
971 state.kind = 'sequence';
972 state.result = _result;
978 function readBlockMapping(state, nodeIndent, flowIndent) {
984 _anchor = state.anchor,
986 overridableKeys = {},
990 atExplicitKey = false,
994 if (state.anchor !== null) {
995 state.anchorMap[state.anchor] = _result;
998 ch = state.input.charCodeAt(state.position);
1001 following = state.input.charCodeAt(state.position + 1);
1002 _line = state.line; // Save the current line.
1003 _pos = state.position;
1006 // Explicit notation case. There are two separate blocks:
1007 // first for the key (denoted by "?") and second for the value (denoted by ":")
1009 if ((ch === 0x3F/* ? */ || ch === 0x3A/* : */) && is_WS_OR_EOL(following)) {
1011 if (ch === 0x3F/* ? */) {
1012 if (atExplicitKey) {
1013 storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
1014 keyTag = keyNode = valueNode = null;
1018 atExplicitKey = true;
1019 allowCompact = true;
1021 } else if (atExplicitKey) {
1022 // i.e. 0x3A/* : */ === character after the explicit key.
1023 atExplicitKey = false;
1024 allowCompact = true;
1027 throwError(state, 'incomplete explicit mapping pair; a key node is missed; or followed by a non-tabulated empty line');
1030 state.position += 1;
1034 // Implicit notation case. Flow-style node as the key first, then ":", and the value.
1036 } else if (composeNode(state, flowIndent, CONTEXT_FLOW_OUT, false, true)) {
1038 if (state.line === _line) {
1039 ch = state.input.charCodeAt(state.position);
1041 while (is_WHITE_SPACE(ch)) {
1042 ch = state.input.charCodeAt(++state.position);
1045 if (ch === 0x3A/* : */) {
1046 ch = state.input.charCodeAt(++state.position);
1048 if (!is_WS_OR_EOL(ch)) {
1049 throwError(state, 'a whitespace character is expected after the key-value separator within a block mapping');
1052 if (atExplicitKey) {
1053 storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
1054 keyTag = keyNode = valueNode = null;
1058 atExplicitKey = false;
1059 allowCompact = false;
1061 keyNode = state.result;
1063 } else if (detected) {
1064 throwError(state, 'can not read an implicit mapping pair; a colon is missed');
1068 state.anchor = _anchor;
1069 return true; // Keep the result of `composeNode`.
1072 } else if (detected) {
1073 throwError(state, 'can not read a block mapping entry; a multiline key may not be an implicit key');
1077 state.anchor = _anchor;
1078 return true; // Keep the result of `composeNode`.
1082 break; // Reading is done. Go to the epilogue.
1086 // Common reading code for both explicit and implicit notations.
1088 if (state.line === _line || state.lineIndent > nodeIndent) {
1089 if (composeNode(state, nodeIndent, CONTEXT_BLOCK_OUT, true, allowCompact)) {
1090 if (atExplicitKey) {
1091 keyNode = state.result;
1093 valueNode = state.result;
1097 if (!atExplicitKey) {
1098 storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode, _line, _pos);
1099 keyTag = keyNode = valueNode = null;
1102 skipSeparationSpace(state, true, -1);
1103 ch = state.input.charCodeAt(state.position);
1106 if (state.lineIndent > nodeIndent && (ch !== 0)) {
1107 throwError(state, 'bad indentation of a mapping entry');
1108 } else if (state.lineIndent < nodeIndent) {
1117 // Special case: last mapping's node contains only the key in explicit notation.
1118 if (atExplicitKey) {
1119 storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
1122 // Expose the resulting mapping.
1125 state.anchor = _anchor;
1126 state.kind = 'mapping';
1127 state.result = _result;
1133 function readTagProperty(state) {
1141 ch = state.input.charCodeAt(state.position);
1143 if (ch !== 0x21/* ! */) return false;
1145 if (state.tag !== null) {
1146 throwError(state, 'duplication of a tag property');
1149 ch = state.input.charCodeAt(++state.position);
1151 if (ch === 0x3C/* < */) {
1153 ch = state.input.charCodeAt(++state.position);
1155 } else if (ch === 0x21/* ! */) {
1158 ch = state.input.charCodeAt(++state.position);
1164 _position = state.position;
1167 do { ch = state.input.charCodeAt(++state.position); }
1168 while (ch !== 0 && ch !== 0x3E/* > */);
1170 if (state.position < state.length) {
1171 tagName = state.input.slice(_position, state.position);
1172 ch = state.input.charCodeAt(++state.position);
1174 throwError(state, 'unexpected end of the stream within a verbatim tag');
1177 while (ch !== 0 && !is_WS_OR_EOL(ch)) {
1179 if (ch === 0x21/* ! */) {
1181 tagHandle = state.input.slice(_position - 1, state.position + 1);
1183 if (!PATTERN_TAG_HANDLE.test(tagHandle)) {
1184 throwError(state, 'named tag handle cannot contain such characters');
1188 _position = state.position + 1;
1190 throwError(state, 'tag suffix cannot contain exclamation marks');
1194 ch = state.input.charCodeAt(++state.position);
1197 tagName = state.input.slice(_position, state.position);
1199 if (PATTERN_FLOW_INDICATORS.test(tagName)) {
1200 throwError(state, 'tag suffix cannot contain flow indicator characters');
1204 if (tagName && !PATTERN_TAG_URI.test(tagName)) {
1205 throwError(state, 'tag name cannot contain such characters: ' + tagName);
1209 state.tag = tagName;
1211 } else if (_hasOwnProperty.call(state.tagMap, tagHandle)) {
1212 state.tag = state.tagMap[tagHandle] + tagName;
1214 } else if (tagHandle === '!') {
1215 state.tag = '!' + tagName;
1217 } else if (tagHandle === '!!') {
1218 state.tag = 'tag:yaml.org,2002:' + tagName;
1221 throwError(state, 'undeclared tag handle "' + tagHandle + '"');
1227 function readAnchorProperty(state) {
1231 ch = state.input.charCodeAt(state.position);
1233 if (ch !== 0x26/* & */) return false;
1235 if (state.anchor !== null) {
1236 throwError(state, 'duplication of an anchor property');
1239 ch = state.input.charCodeAt(++state.position);
1240 _position = state.position;
1242 while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {
1243 ch = state.input.charCodeAt(++state.position);
1246 if (state.position === _position) {
1247 throwError(state, 'name of an anchor node must contain at least one character');
1250 state.anchor = state.input.slice(_position, state.position);
1254 function readAlias(state) {
1255 var _position, alias,
1258 ch = state.input.charCodeAt(state.position);
1260 if (ch !== 0x2A/* * */) return false;
1262 ch = state.input.charCodeAt(++state.position);
1263 _position = state.position;
1265 while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {
1266 ch = state.input.charCodeAt(++state.position);
1269 if (state.position === _position) {
1270 throwError(state, 'name of an alias node must contain at least one character');
1273 alias = state.input.slice(_position, state.position);
1275 if (!_hasOwnProperty.call(state.anchorMap, alias)) {
1276 throwError(state, 'unidentified alias "' + alias + '"');
1279 state.result = state.anchorMap[alias];
1280 skipSeparationSpace(state, true, -1);
1284 function composeNode(state, parentIndent, nodeContext, allowToSeek, allowCompact) {
1285 var allowBlockStyles,
1287 allowBlockCollections,
1288 indentStatus = 1, // 1: this>parent, 0: this=parent, -1: this<parent
1297 if (state.listener !== null) {
1298 state.listener('open', state);
1302 state.anchor = null;
1304 state.result = null;
1306 allowBlockStyles = allowBlockScalars = allowBlockCollections =
1307 CONTEXT_BLOCK_OUT === nodeContext ||
1308 CONTEXT_BLOCK_IN === nodeContext;
1311 if (skipSeparationSpace(state, true, -1)) {
1314 if (state.lineIndent > parentIndent) {
1316 } else if (state.lineIndent === parentIndent) {
1318 } else if (state.lineIndent < parentIndent) {
1324 if (indentStatus === 1) {
1325 while (readTagProperty(state) || readAnchorProperty(state)) {
1326 if (skipSeparationSpace(state, true, -1)) {
1328 allowBlockCollections = allowBlockStyles;
1330 if (state.lineIndent > parentIndent) {
1332 } else if (state.lineIndent === parentIndent) {
1334 } else if (state.lineIndent < parentIndent) {
1338 allowBlockCollections = false;
1343 if (allowBlockCollections) {
1344 allowBlockCollections = atNewLine || allowCompact;
1347 if (indentStatus === 1 || CONTEXT_BLOCK_OUT === nodeContext) {
1348 if (CONTEXT_FLOW_IN === nodeContext || CONTEXT_FLOW_OUT === nodeContext) {
1349 flowIndent = parentIndent;
1351 flowIndent = parentIndent + 1;
1354 blockIndent = state.position - state.lineStart;
1356 if (indentStatus === 1) {
1357 if (allowBlockCollections &&
1358 (readBlockSequence(state, blockIndent) ||
1359 readBlockMapping(state, blockIndent, flowIndent)) ||
1360 readFlowCollection(state, flowIndent)) {
1363 if ((allowBlockScalars && readBlockScalar(state, flowIndent)) ||
1364 readSingleQuotedScalar(state, flowIndent) ||
1365 readDoubleQuotedScalar(state, flowIndent)) {
1368 } else if (readAlias(state)) {
1371 if (state.tag !== null || state.anchor !== null) {
1372 throwError(state, 'alias node should not have any properties');
1375 } else if (readPlainScalar(state, flowIndent, CONTEXT_FLOW_IN === nodeContext)) {
1378 if (state.tag === null) {
1383 if (state.anchor !== null) {
1384 state.anchorMap[state.anchor] = state.result;
1387 } else if (indentStatus === 0) {
1388 // Special case: block sequences are allowed to have same indentation level as the parent.
1389 // http://www.yaml.org/spec/1.2/spec.html#id2799784
1390 hasContent = allowBlockCollections && readBlockSequence(state, blockIndent);
1394 if (state.tag !== null && state.tag !== '!') {
1395 if (state.tag === '?') {
1396 // Implicit resolving is not allowed for non-scalar types, and '?'
1397 // non-specific tag is only automatically assigned to plain scalars.
1399 // We only need to check kind conformity in case user explicitly assigns '?'
1400 // tag, for example like this: "!<?> [0]"
1402 if (state.result !== null && state.kind !== 'scalar') {
1403 throwError(state, 'unacceptable node kind for !<?> tag; it should be "scalar", not "' + state.kind + '"');
1406 for (typeIndex = 0, typeQuantity = state.implicitTypes.length; typeIndex < typeQuantity; typeIndex += 1) {
1407 type = state.implicitTypes[typeIndex];
1409 if (type.resolve(state.result)) { // `state.result` updated in resolver if matched
1410 state.result = type.construct(state.result);
1411 state.tag = type.tag;
1412 if (state.anchor !== null) {
1413 state.anchorMap[state.anchor] = state.result;
1418 } else if (_hasOwnProperty.call(state.typeMap[state.kind || 'fallback'], state.tag)) {
1419 type = state.typeMap[state.kind || 'fallback'][state.tag];
1421 if (state.result !== null && type.kind !== state.kind) {
1422 throwError(state, 'unacceptable node kind for !<' + state.tag + '> tag; it should be "' + type.kind + '", not "' + state.kind + '"');
1425 if (!type.resolve(state.result)) { // `state.result` updated in resolver if matched
1426 throwError(state, 'cannot resolve a node with !<' + state.tag + '> explicit tag');
1428 state.result = type.construct(state.result);
1429 if (state.anchor !== null) {
1430 state.anchorMap[state.anchor] = state.result;
1434 throwError(state, 'unknown tag !<' + state.tag + '>');
1438 if (state.listener !== null) {
1439 state.listener('close', state);
1441 return state.tag !== null || state.anchor !== null || hasContent;
1444 function readDocument(state) {
1445 var documentStart = state.position,
1449 hasDirectives = false,
1452 state.version = null;
1453 state.checkLineBreaks = state.legacy;
1455 state.anchorMap = {};
1457 while ((ch = state.input.charCodeAt(state.position)) !== 0) {
1458 skipSeparationSpace(state, true, -1);
1460 ch = state.input.charCodeAt(state.position);
1462 if (state.lineIndent > 0 || ch !== 0x25/* % */) {
1466 hasDirectives = true;
1467 ch = state.input.charCodeAt(++state.position);
1468 _position = state.position;
1470 while (ch !== 0 && !is_WS_OR_EOL(ch)) {
1471 ch = state.input.charCodeAt(++state.position);
1474 directiveName = state.input.slice(_position, state.position);
1477 if (directiveName.length < 1) {
1478 throwError(state, 'directive name must not be less than one character in length');
1482 while (is_WHITE_SPACE(ch)) {
1483 ch = state.input.charCodeAt(++state.position);
1486 if (ch === 0x23/* # */) {
1487 do { ch = state.input.charCodeAt(++state.position); }
1488 while (ch !== 0 && !is_EOL(ch));
1492 if (is_EOL(ch)) break;
1494 _position = state.position;
1496 while (ch !== 0 && !is_WS_OR_EOL(ch)) {
1497 ch = state.input.charCodeAt(++state.position);
1500 directiveArgs.push(state.input.slice(_position, state.position));
1503 if (ch !== 0) readLineBreak(state);
1505 if (_hasOwnProperty.call(directiveHandlers, directiveName)) {
1506 directiveHandlers[directiveName](state, directiveName, directiveArgs);
1508 throwWarning(state, 'unknown document directive "' + directiveName + '"');
1512 skipSeparationSpace(state, true, -1);
1514 if (state.lineIndent === 0 &&
1515 state.input.charCodeAt(state.position) === 0x2D/* - */ &&
1516 state.input.charCodeAt(state.position + 1) === 0x2D/* - */ &&
1517 state.input.charCodeAt(state.position + 2) === 0x2D/* - */) {
1518 state.position += 3;
1519 skipSeparationSpace(state, true, -1);
1521 } else if (hasDirectives) {
1522 throwError(state, 'directives end mark is expected');
1525 composeNode(state, state.lineIndent - 1, CONTEXT_BLOCK_OUT, false, true);
1526 skipSeparationSpace(state, true, -1);
1528 if (state.checkLineBreaks &&
1529 PATTERN_NON_ASCII_LINE_BREAKS.test(state.input.slice(documentStart, state.position))) {
1530 throwWarning(state, 'non-ASCII line breaks are interpreted as content');
1533 state.documents.push(state.result);
1535 if (state.position === state.lineStart && testDocumentSeparator(state)) {
1537 if (state.input.charCodeAt(state.position) === 0x2E/* . */) {
1538 state.position += 3;
1539 skipSeparationSpace(state, true, -1);
1544 if (state.position < (state.length - 1)) {
1545 throwError(state, 'end of the stream or a document separator is expected');
1552 function loadDocuments(input, options) {
1553 input = String(input);
1554 options = options || {};
1556 if (input.length !== 0) {
1558 // Add tailing `\n` if not exists
1559 if (input.charCodeAt(input.length - 1) !== 0x0A/* LF */ &&
1560 input.charCodeAt(input.length - 1) !== 0x0D/* CR */) {
1565 if (input.charCodeAt(0) === 0xFEFF) {
1566 input = input.slice(1);
1570 var state = new State(input, options);
1572 var nullpos = input.indexOf('\0');
1574 if (nullpos !== -1) {
1575 state.position = nullpos;
1576 throwError(state, 'null byte is not allowed in input');
1579 // Use 0 as string terminator. That significantly simplifies bounds check.
1580 state.input += '\0';
1582 while (state.input.charCodeAt(state.position) === 0x20/* Space */) {
1583 state.lineIndent += 1;
1584 state.position += 1;
1587 while (state.position < (state.length - 1)) {
1588 readDocument(state);
1591 return state.documents;
1595 function loadAll(input, iterator, options) {
1596 if (iterator !== null && typeof iterator === 'object' && typeof options === 'undefined') {
1601 var documents = loadDocuments(input, options);
1603 if (typeof iterator !== 'function') {
1607 for (var index = 0, length = documents.length; index < length; index += 1) {
1608 iterator(documents[index]);
1613 function load(input, options) {
1614 var documents = loadDocuments(input, options);
1616 if (documents.length === 0) {
1617 /*eslint-disable no-undefined*/
1619 } else if (documents.length === 1) {
1620 return documents[0];
1622 throw new YAMLException('expected a single document in the stream, but found more');
1626 function safeLoadAll(input, iterator, options) {
1627 if (typeof iterator === 'object' && iterator !== null && typeof options === 'undefined') {
1632 return loadAll(input, iterator, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
1636 function safeLoad(input, options) {
1637 return load(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
1641 module.exports.loadAll = loadAll;
1642 module.exports.load = load;
1643 module.exports.safeLoadAll = safeLoadAll;
1644 module.exports.safeLoad = safeLoad;