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218 lines
9.1 KiB
218 lines
9.1 KiB
'use strict'; |
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var resolveBlockScalar = require('../compose/resolve-block-scalar.js'); |
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var resolveFlowScalar = require('../compose/resolve-flow-scalar.js'); |
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var errors = require('../errors.js'); |
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var stringifyString = require('../stringify/stringifyString.js'); |
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function resolveAsScalar(token, strict = true, onError) { |
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if (token) { |
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const _onError = (pos, code, message) => { |
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const offset = typeof pos === 'number' ? pos : Array.isArray(pos) ? pos[0] : pos.offset; |
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if (onError) |
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onError(offset, code, message); |
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else |
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throw new errors.YAMLParseError([offset, offset + 1], code, message); |
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}; |
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switch (token.type) { |
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case 'scalar': |
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case 'single-quoted-scalar': |
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case 'double-quoted-scalar': |
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return resolveFlowScalar.resolveFlowScalar(token, strict, _onError); |
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case 'block-scalar': |
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return resolveBlockScalar.resolveBlockScalar(token, strict, _onError); |
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} |
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} |
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return null; |
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} |
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/** |
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* Create a new scalar token with `value` |
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* |
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* Values that represent an actual string but may be parsed as a different type should use a `type` other than `'PLAIN'`, |
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* as this function does not support any schema operations and won't check for such conflicts. |
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* |
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* @param value The string representation of the value, which will have its content properly indented. |
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* @param context.end Comments and whitespace after the end of the value, or after the block scalar header. If undefined, a newline will be added. |
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* @param context.implicitKey Being within an implicit key may affect the resolved type of the token's value. |
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* @param context.indent The indent level of the token. |
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* @param context.inFlow Is this scalar within a flow collection? This may affect the resolved type of the token's value. |
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* @param context.offset The offset position of the token. |
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* @param context.type The preferred type of the scalar token. If undefined, the previous type of the `token` will be used, defaulting to `'PLAIN'`. |
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*/ |
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function createScalarToken(value, context) { |
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const { implicitKey = false, indent, inFlow = false, offset = -1, type = 'PLAIN' } = context; |
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const source = stringifyString.stringifyString({ type, value }, { |
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implicitKey, |
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indent: indent > 0 ? ' '.repeat(indent) : '', |
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inFlow, |
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options: { blockQuote: true, lineWidth: -1 } |
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}); |
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const end = context.end ?? [ |
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{ type: 'newline', offset: -1, indent, source: '\n' } |
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]; |
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switch (source[0]) { |
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case '|': |
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case '>': { |
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const he = source.indexOf('\n'); |
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const head = source.substring(0, he); |
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const body = source.substring(he + 1) + '\n'; |
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const props = [ |
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{ type: 'block-scalar-header', offset, indent, source: head } |
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]; |
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if (!addEndtoBlockProps(props, end)) |
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props.push({ type: 'newline', offset: -1, indent, source: '\n' }); |
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return { type: 'block-scalar', offset, indent, props, source: body }; |
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} |
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case '"': |
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return { type: 'double-quoted-scalar', offset, indent, source, end }; |
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case "'": |
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return { type: 'single-quoted-scalar', offset, indent, source, end }; |
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default: |
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return { type: 'scalar', offset, indent, source, end }; |
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} |
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} |
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/** |
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* Set the value of `token` to the given string `value`, overwriting any previous contents and type that it may have. |
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* |
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* Best efforts are made to retain any comments previously associated with the `token`, |
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* though all contents within a collection's `items` will be overwritten. |
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* |
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* Values that represent an actual string but may be parsed as a different type should use a `type` other than `'PLAIN'`, |
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* as this function does not support any schema operations and won't check for such conflicts. |
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* |
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* @param token Any token. If it does not include an `indent` value, the value will be stringified as if it were an implicit key. |
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* @param value The string representation of the value, which will have its content properly indented. |
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* @param context.afterKey In most cases, values after a key should have an additional level of indentation. |
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* @param context.implicitKey Being within an implicit key may affect the resolved type of the token's value. |
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* @param context.inFlow Being within a flow collection may affect the resolved type of the token's value. |
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* @param context.type The preferred type of the scalar token. If undefined, the previous type of the `token` will be used, defaulting to `'PLAIN'`. |
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*/ |
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function setScalarValue(token, value, context = {}) { |
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let { afterKey = false, implicitKey = false, inFlow = false, type } = context; |
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let indent = 'indent' in token ? token.indent : null; |
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if (afterKey && typeof indent === 'number') |
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indent += 2; |
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if (!type) |
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switch (token.type) { |
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case 'single-quoted-scalar': |
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type = 'QUOTE_SINGLE'; |
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break; |
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case 'double-quoted-scalar': |
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type = 'QUOTE_DOUBLE'; |
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break; |
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case 'block-scalar': { |
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const header = token.props[0]; |
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if (header.type !== 'block-scalar-header') |
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throw new Error('Invalid block scalar header'); |
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type = header.source[0] === '>' ? 'BLOCK_FOLDED' : 'BLOCK_LITERAL'; |
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break; |
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} |
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default: |
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type = 'PLAIN'; |
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} |
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const source = stringifyString.stringifyString({ type, value }, { |
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implicitKey: implicitKey || indent === null, |
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indent: indent !== null && indent > 0 ? ' '.repeat(indent) : '', |
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inFlow, |
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options: { blockQuote: true, lineWidth: -1 } |
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}); |
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switch (source[0]) { |
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case '|': |
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case '>': |
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setBlockScalarValue(token, source); |
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break; |
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case '"': |
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setFlowScalarValue(token, source, 'double-quoted-scalar'); |
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break; |
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case "'": |
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setFlowScalarValue(token, source, 'single-quoted-scalar'); |
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break; |
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default: |
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setFlowScalarValue(token, source, 'scalar'); |
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} |
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} |
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function setBlockScalarValue(token, source) { |
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const he = source.indexOf('\n'); |
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const head = source.substring(0, he); |
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const body = source.substring(he + 1) + '\n'; |
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if (token.type === 'block-scalar') { |
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const header = token.props[0]; |
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if (header.type !== 'block-scalar-header') |
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throw new Error('Invalid block scalar header'); |
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header.source = head; |
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token.source = body; |
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} |
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else { |
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const { offset } = token; |
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const indent = 'indent' in token ? token.indent : -1; |
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const props = [ |
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{ type: 'block-scalar-header', offset, indent, source: head } |
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]; |
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if (!addEndtoBlockProps(props, 'end' in token ? token.end : undefined)) |
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props.push({ type: 'newline', offset: -1, indent, source: '\n' }); |
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for (const key of Object.keys(token)) |
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if (key !== 'type' && key !== 'offset') |
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delete token[key]; |
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Object.assign(token, { type: 'block-scalar', indent, props, source: body }); |
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} |
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} |
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/** @returns `true` if last token is a newline */ |
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function addEndtoBlockProps(props, end) { |
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if (end) |
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for (const st of end) |
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switch (st.type) { |
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case 'space': |
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case 'comment': |
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props.push(st); |
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break; |
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case 'newline': |
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props.push(st); |
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return true; |
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} |
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return false; |
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} |
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function setFlowScalarValue(token, source, type) { |
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switch (token.type) { |
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case 'scalar': |
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case 'double-quoted-scalar': |
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case 'single-quoted-scalar': |
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token.type = type; |
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token.source = source; |
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break; |
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case 'block-scalar': { |
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const end = token.props.slice(1); |
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let oa = source.length; |
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if (token.props[0].type === 'block-scalar-header') |
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oa -= token.props[0].source.length; |
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for (const tok of end) |
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tok.offset += oa; |
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delete token.props; |
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Object.assign(token, { type, source, end }); |
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break; |
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} |
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case 'block-map': |
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case 'block-seq': { |
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const offset = token.offset + source.length; |
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const nl = { type: 'newline', offset, indent: token.indent, source: '\n' }; |
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delete token.items; |
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Object.assign(token, { type, source, end: [nl] }); |
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break; |
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} |
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default: { |
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const indent = 'indent' in token ? token.indent : -1; |
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const end = 'end' in token && Array.isArray(token.end) |
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? token.end.filter(st => st.type === 'space' || |
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st.type === 'comment' || |
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st.type === 'newline') |
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: []; |
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for (const key of Object.keys(token)) |
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if (key !== 'type' && key !== 'offset') |
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delete token[key]; |
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Object.assign(token, { type, indent, source, end }); |
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} |
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} |
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} |
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exports.createScalarToken = createScalarToken; |
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exports.resolveAsScalar = resolveAsScalar; |
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exports.setScalarValue = setScalarValue;
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