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"use strict"
module.exports = function(Parser) {
return class extends Parser {
readInt(radix, len) {
// Hack: len is only != null for unicode escape sequences,
// where numeric separators are not allowed
if (len != null) return super.readInt(radix, len)
let start = this.pos, total = 0, acceptUnderscore = false
for (;;) {
let code = this.input.charCodeAt(this.pos), val
if (code >= 97) val = code - 97 + 10 // a
else if (code == 95) {
if (!acceptUnderscore) this.raise(this.pos, "Invalid numeric separator")
++this.pos
acceptUnderscore = false
continue
} else if (code >= 65) val = code - 65 + 10 // A
else if (code >= 48 && code <= 57) val = code - 48 // 0-9
else val = Infinity
if (val >= radix) break
++this.pos
total = total * radix + val
acceptUnderscore = true
}
if (this.pos === start) return null
if (!acceptUnderscore) this.raise(this.pos - 1, "Invalid numeric separator")
return total
}
readNumber(startsWithDot) {
const token = super.readNumber(startsWithDot)
let octal = this.end - this.start >= 2 && this.input.charCodeAt(this.start) === 48
const stripped = this.getNumberInput(this.start, this.end)
if (stripped.length < this.end - this.start) {
if (octal) this.raise(this.start, "Invalid number")
this.value = parseFloat(stripped)
}
return token
}
// This is used by acorn-bigint
getNumberInput(start, end) {
return this.input.slice(start, end).replace(/_/g, "")
}
}
}
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