72c6ea2683
This adds bigint, class-fields, numeric-separators, static-class features, private class methods and fields as dependency. That way it's possible to use these in combination with acorn to parse these language features. This also removes a couple of files that were not necessary for Node.js to reduce the code base. PR-URL: https://github.com/nodejs/node/pull/27400 Refs: https://github.com/nodejs/node/issues/27391 Refs: https://github.com/nodejs/node/issues/25835 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Michaël Zasso <targos@protonmail.com>
50 lines
1.6 KiB
JavaScript
50 lines
1.6 KiB
JavaScript
"use strict"
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module.exports = function(Parser) {
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return class extends Parser {
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readInt(radix, len) {
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// Hack: len is only != null for unicode escape sequences,
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// where numeric separators are not allowed
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if (len != null) return super.readInt(radix, len)
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let start = this.pos, total = 0, acceptUnderscore = false
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for (;;) {
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let code = this.input.charCodeAt(this.pos), val
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if (code >= 97) val = code - 97 + 10 // a
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else if (code == 95) {
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if (!acceptUnderscore) this.raise(this.pos, "Invalid numeric separator")
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++this.pos
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acceptUnderscore = false
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continue
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} else if (code >= 65) val = code - 65 + 10 // A
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else if (code >= 48 && code <= 57) val = code - 48 // 0-9
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else val = Infinity
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if (val >= radix) break
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++this.pos
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total = total * radix + val
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acceptUnderscore = true
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}
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if (this.pos === start) return null
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if (!acceptUnderscore) this.raise(this.pos - 1, "Invalid numeric separator")
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return total
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}
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readNumber(startsWithDot) {
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const token = super.readNumber(startsWithDot)
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let octal = this.end - this.start >= 2 && this.input.charCodeAt(this.start) === 48
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const stripped = this.getNumberInput(this.start, this.end)
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if (stripped.length < this.end - this.start) {
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if (octal) this.raise(this.start, "Invalid number")
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this.value = parseFloat(stripped)
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}
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return token
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}
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// This is used by acorn-bigint
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getNumberInput(start, end) {
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return this.input.slice(start, end).replace(/_/g, "")
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}
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}
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}
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