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extend support for numeral literals (#4176)

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This commit is contained in:
Alex Lam S.L
2020-10-04 17:05:03 +01:00
committed by GitHub
parent 66140b459e
commit 58ac5b9bd5
2 changed files with 75 additions and 17 deletions
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31
lib/parse.js
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@@ -60,8 +60,9 @@ KEYWORDS_ATOM = makePredicate(KEYWORDS_ATOM);
var OPERATOR_CHARS = makePredicate(characters("+-*&%=<>!?|~^"));
var RE_HEX_NUMBER = /^0x[0-9a-f]+$/i;
var RE_OCT_NUMBER = /^0[0-7]+$/;
var RE_BIN_NUMBER = /^0b([01]+)$/i;
var RE_HEX_NUMBER = /^0x([0-9a-f]+)$/i;
var RE_OCT_NUMBER = /^0o?([0-7]+)$/i;
var OPERATORS = makePredicate([
"in",
@@ -147,10 +148,6 @@ function is_digit(code) {
return code >= 48 && code <= 57;
}
function is_alphanumeric_char(code) {
return is_digit(code) || is_letter(code);
}
function is_unicode_digit(code) {
return UNICODE.digit.test(String.fromCharCode(code));
}
@@ -184,14 +181,12 @@ function is_identifier_string(str) {
}
function parse_js_number(num) {
if (RE_HEX_NUMBER.test(num)) {
return parseInt(num.substr(2), 16);
} else if (RE_OCT_NUMBER.test(num)) {
return parseInt(num.substr(1), 8);
} else {
var val = parseFloat(num);
if (val == num) return val;
}
var match;
if (match = RE_BIN_NUMBER.exec(num)) return parseInt(match[1], 2);
if (match = RE_HEX_NUMBER.exec(num)) return parseInt(match[1], 16);
if (match = RE_OCT_NUMBER.exec(num)) return parseInt(match[1], 8);
var val = parseFloat(num);
if (val == num) return val;
}
function JS_Parse_Error(message, filename, line, col, pos) {
@@ -347,11 +342,13 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
case (after_e = false, 46): // .
return (!has_dot && !has_x && !has_e) ? (has_dot = true) : false;
}
return is_alphanumeric_char(code);
return is_digit(code) || is_letter(code) || ch == "_";
});
if (prefix) num = prefix + num;
if (RE_OCT_NUMBER.test(num) && next_token.has_directive("use strict")) {
parse_error("Legacy octal literals are not allowed in strict mode");
if (/^0[0-7_]+$/.test(num)) {
if (next_token.has_directive("use strict")) parse_error("Legacy octal literals are not allowed in strict mode");
} else {
num = num.replace(has_x ? /([1-9a-f]|.0)_(?=[0-9a-f])/gi : /([1-9]|.0)_(?=[0-9])/gi, "$1");
}
var valid = parse_js_number(num);
if (!isNaN(valid)) return token("num", valid);