mirror of
https://github.com/harttle/liquidjs.git
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harttle
677e8511e6
fix: `Nil`(null, undefined) now renders as empty string change: `parser.parseValue()` renamed to `parser.parseOutput` change: registered tags/filters become static and shared across different liquid instances
87 lines
3.0 KiB
TypeScript
87 lines
3.0 KiB
TypeScript
// quote related
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const singleQuoted = /'[^']*'/
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const doubleQuoted = /"[^"]*"/
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export const quoted = new RegExp(`${singleQuoted.source}|${doubleQuoted.source}`)
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export const quoteBalanced = new RegExp(`(?:${quoted.source}|[^'"])*`)
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// basic types
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export const integer = /-?\d+/
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export const number = /-?\d+\.?\d*|\.?\d+/
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export const bool = /true|false/
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// property access
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export const identifier = /[\w-]+[?]?/
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export const subscript = new RegExp(`\\[(?:${quoted.source}|[\\w-\\.]+)\\]`)
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export const literal = new RegExp(`(?:${quoted.source}|${bool.source}|${number.source})`)
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export const variable = new RegExp(`${identifier.source}(?:\\.${identifier.source}|${subscript.source})*`)
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// range related
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export const rangeLimit = new RegExp(`(?:${variable.source}|${number.source})`)
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export const range = new RegExp(`\\(${rangeLimit.source}\\.\\.${rangeLimit.source}\\)`)
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export const rangeCapture = new RegExp(`\\((${rangeLimit.source})\\.\\.(${rangeLimit.source})\\)`)
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export const value = new RegExp(`(?:${variable.source}|${literal.source}|${range.source})`)
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// hash related
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export const hash = new RegExp(`(?:${identifier.source})\\s*:\\s*(?:${value.source})`)
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export const hashCapture = new RegExp(`(${identifier.source})\\s*:\\s*(${value.source})`, 'g')
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// full match
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export const tagLine = new RegExp(`^\\s*(${identifier.source})\\s*([\\s\\S]*?)\\s*$`)
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export const literalLine = new RegExp(`^${literal.source}$`, 'i')
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export const variableLine = new RegExp(`^${variable.source}$`)
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export const numberLine = new RegExp(`^${number.source}$`)
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export const boolLine = new RegExp(`^${bool.source}$`, 'i')
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export const quotedLine = new RegExp(`^${quoted.source}$`)
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export const rangeLine = new RegExp(`^${rangeCapture.source}$`)
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export const integerLine = new RegExp(`^${integer.source}$`)
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// filter related
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export const valueDeclaration = new RegExp(`(?:${identifier.source}\\s*:\\s*)?${value.source}`)
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export const valueList = new RegExp(`${valueDeclaration.source}(\\s*,\\s*${valueDeclaration.source})*`)
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export const filter = new RegExp(`${identifier.source}(?:\\s*:\\s*${valueList.source})?`, 'g')
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export const filterCapture = new RegExp(`(${identifier.source})(?:\\s*:\\s*(${valueList.source}))?`)
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export const filterLine = new RegExp(`^${filterCapture.source}$`)
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export const operators = [
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/\s+or\s+/,
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/\s+and\s+/,
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/==|!=|<=|>=|<|>|\s+contains\s+/
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]
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export function isInteger (str) {
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return integerLine.test(str)
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}
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export function isLiteral (str) {
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return literalLine.test(str)
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}
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export function isRange (str) {
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return rangeLine.test(str)
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}
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export function isVariable (str) {
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return variableLine.test(str)
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}
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export function matchValue (str) {
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return value.exec(str)
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}
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export function parseLiteral (str) {
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let res = str.match(numberLine)
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if (res) {
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return Number(str)
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}
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res = str.match(boolLine)
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if (res) {
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return str.toLowerCase() === 'true'
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}
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res = str.match(quotedLine)
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if (res) {
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return str.slice(1, -1)
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}
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throw new TypeError(`cannot parse '${str}' as literal`)
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}
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