Fix: #3342 hexadecimal input not turned into a bigint

src/utils/number.js

@@ -20,12 +20,11 @@ export function isInteger (value) {
 }
 
 /**
- * Check if a string contains an integer
+ * Check if a string contains an integer number like "123" and "-123"
  * @param {string} str
  * @return {boolean} isInteger
  */
 export function isIntegerStr (str) {
-  // regex matching strings like "123" and "-123"
   return /^-?\d+$/.test(str)
 }
 
@@ -48,8 +47,12 @@ export function isIntegerStr (str) {
  * @returns {'number' | 'BigNumber' | 'bigint' | 'Fraction'}
  */
 export function safeNumberType (numberStr, config) {
-  if (config.number === 'bigint' && !isIntegerStr(numberStr)) {
-    return config.numberFallback
+  if (config.number === 'bigint') {
+    try {
+      BigInt(numberStr)
+    } catch {
+      return config.numberFallback
+    }
   }
 
   return config.number

test/unit-tests/expression/parse.test.js

@@ -2248,6 +2248,12 @@ describe('parse', function () {
       assert.strictEqual(bigmath.evaluate('-2.3'), -2.3)
     })
 
+    it('should parse hex, bin, oct numbers as bigint', function () {
+      assert.strictEqual(bigmath.evaluate('0xA2'), 162n)
+      assert.strictEqual(bigmath.evaluate('0b1011'), 11n)
+      assert.strictEqual(bigmath.evaluate('0o70'), 56n)
+    })
+
     it('should fallback on the configured numberFallback when parsing as bigint', function () {
       const bigmathFallback = math.create({
         number: 'bigint',