Lexer | /node_modules/yaml/dist/parse/lexer.d.ts | windmill@v1.303.4

class Lexer

import { Lexer } from "https://deno.land/x/windmill@v1.303.4/node_modules/yaml/dist/parse/lexer.d.ts";

Splits an input string into lexical tokens, i.e. smaller strings that are easily identifiable by tokens.tokenType().

Lexing starts always in a "stream" context. Incomplete input may be buffered until a complete token can be emitted.

In addition to slices of the original input, the following control characters may also be emitted:

\x02 (Start of Text): A document starts with the next token
\x18 (Cancel): Unexpected end of flow-mode (indicates an error)
\x1f (Unit Separator): Next token is a scalar value
\u{FEFF} (Byte order mark): Emitted separately outside documents

Properties

private

atEnd

Flag indicating whether the end of the current buffer marks the end of all input

private

atLineEnd

private

blockScalarIndent

Explicit indent set in block scalar header, as an offset from the current minimum indent, so e.g. set to 1 from a header |2+. Set to -1 if not explicitly set.

private

blockScalarKeep

Block scalars that include a + (keep) chomping indicator in their header include trailing empty lines, which are otherwise excluded from the scalar's contents.

private

buffer

Current input

private

charAt

private

continueScalar

private

flowKey

Flag noting whether the map value indicator : can immediately follow this node within a flow context.

private

flowLevel

Count of surrounding flow collection levels.

private

getLine

private

hasChars

private

indentNext

Minimum level of indentation required for next lines to be parsed as a part of the current scalar value.

private

indentValue

Indentation level of the current line.

private

lineEndPos

Position of the next \n character.

private

Stores the state of the lexer if reaching the end of incpomplete input

private

parseBlockScalar

private

parseBlockScalarHeader

private

parseBlockStart

private

parseDocument

private

parseFlowCollection

private

parseLineStart

private

parseNext

private

parsePlainScalar

private

parseQuotedScalar

private

parseStream

private

peek

private

pos

A pointer to buffer; the current position of the lexer.

private

pushCount

private

pushIndicators

private

pushNewline

private

pushSpaces

private

pushTag

private

pushToIndex

private

pushUntil

private

setNext

Methods

lex(source: string, incomplete?: boolean): Generator<string, void, unknown>

Generate YAML tokens from the source string. If incomplete, a part of the last line may be left as a buffer for the next call.