diff options
Diffstat (limited to 'node_modules/yaml/dist/parse/cst.js')
-rw-r--r-- | node_modules/yaml/dist/parse/cst.js | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/node_modules/yaml/dist/parse/cst.js b/node_modules/yaml/dist/parse/cst.js new file mode 100644 index 0000000..613c229 --- /dev/null +++ b/node_modules/yaml/dist/parse/cst.js @@ -0,0 +1,112 @@ +'use strict'; + +var cstScalar = require('./cst-scalar.js'); +var cstStringify = require('./cst-stringify.js'); +var cstVisit = require('./cst-visit.js'); + +/** The byte order mark */ +const BOM = '\u{FEFF}'; +/** Start of doc-mode */ +const DOCUMENT = '\x02'; // C0: Start of Text +/** Unexpected end of flow-mode */ +const FLOW_END = '\x18'; // C0: Cancel +/** Next token is a scalar value */ +const SCALAR = '\x1f'; // C0: Unit Separator +/** @returns `true` if `token` is a flow or block collection */ +const isCollection = (token) => !!token && 'items' in token; +/** @returns `true` if `token` is a flow or block scalar; not an alias */ +const isScalar = (token) => !!token && + (token.type === 'scalar' || + token.type === 'single-quoted-scalar' || + token.type === 'double-quoted-scalar' || + token.type === 'block-scalar'); +/* istanbul ignore next */ +/** Get a printable representation of a lexer token */ +function prettyToken(token) { + switch (token) { + case BOM: + return '<BOM>'; + case DOCUMENT: + return '<DOC>'; + case FLOW_END: + return '<FLOW_END>'; + case SCALAR: + return '<SCALAR>'; + default: + return JSON.stringify(token); + } +} +/** Identify the type of a lexer token. May return `null` for unknown tokens. */ +function tokenType(source) { + switch (source) { + case BOM: + return 'byte-order-mark'; + case DOCUMENT: + return 'doc-mode'; + case FLOW_END: + return 'flow-error-end'; + case SCALAR: + return 'scalar'; + case '---': + return 'doc-start'; + case '...': + return 'doc-end'; + case '': + case '\n': + case '\r\n': + return 'newline'; + case '-': + return 'seq-item-ind'; + case '?': + return 'explicit-key-ind'; + case ':': + return 'map-value-ind'; + case '{': + return 'flow-map-start'; + case '}': + return 'flow-map-end'; + case '[': + return 'flow-seq-start'; + case ']': + return 'flow-seq-end'; + case ',': + return 'comma'; + } + switch (source[0]) { + case ' ': + case '\t': + return 'space'; + case '#': + return 'comment'; + case '%': + return 'directive-line'; + case '*': + return 'alias'; + case '&': + return 'anchor'; + case '!': + return 'tag'; + case "'": + return 'single-quoted-scalar'; + case '"': + return 'double-quoted-scalar'; + case '|': + case '>': + return 'block-scalar-header'; + } + return null; +} + +exports.createScalarToken = cstScalar.createScalarToken; +exports.resolveAsScalar = cstScalar.resolveAsScalar; +exports.setScalarValue = cstScalar.setScalarValue; +exports.stringify = cstStringify.stringify; +exports.visit = cstVisit.visit; +exports.BOM = BOM; +exports.DOCUMENT = DOCUMENT; +exports.FLOW_END = FLOW_END; +exports.SCALAR = SCALAR; +exports.isCollection = isCollection; +exports.isScalar = isScalar; +exports.prettyToken = prettyToken; +exports.tokenType = tokenType; |