Handle numbers with underscores #2039

Author: mikefarah

pkg/yqlib/lib.go

@@ -135,8 +135,12 @@ func recursiveNodeEqual(lhs *CandidateNode, rhs *CandidateNode) bool {
 	return false
 }
 
-// yaml numbers can be hex and octal encoded...
+// yaml numbers can have underscores, be hex and octal encoded...
 func parseInt64(numberString string) (string, int64, error) {
+	if strings.Contains(numberString, "_") {
+		numberString = strings.ReplaceAll(numberString, "_", "")
+	}
+
 	if strings.HasPrefix(numberString, "0x") ||
 		strings.HasPrefix(numberString, "0X") {
 		num, err := strconv.ParseInt(numberString[2:], 16, 64)

pkg/yqlib/lib_test.go

@@ -106,17 +106,28 @@ func TestParseSnippet(t *testing.T) {
 type parseInt64Scenario struct {
 	numberString         string
 	expectedParsedNumber int64
+	expectedFormatString string
 }
 
 var parseInt64Scenarios = []parseInt64Scenario{
 	{
 		numberString:         "34",
 		expectedParsedNumber: 34,
 	},
+	{
+		numberString:         "10_000",
+		expectedParsedNumber: 10000,
+		expectedFormatString: "10000",
+	},
 	{
 		numberString:         "0x10",
 		expectedParsedNumber: 16,
 	},
+	{
+		numberString:         "0x10_000",
+		expectedParsedNumber: 65536,
+		expectedFormatString: "0x10000",
+	},
 	{
 		numberString:         "0o10",
 		expectedParsedNumber: 8,
@@ -132,7 +143,10 @@ func TestParseInt64(t *testing.T) {
 			t.Error(err)
 		}
 		test.AssertResultComplexWithContext(t, tt.expectedParsedNumber, actualNumber, tt.numberString)
+		if tt.expectedFormatString == "" {
+			tt.expectedFormatString = tt.numberString
+		}
 
-		test.AssertResultComplexWithContext(t, tt.numberString, fmt.Sprintf(format, actualNumber), fmt.Sprintf("Formatting of: %v", tt.numberString))
+		test.AssertResultComplexWithContext(t, tt.expectedFormatString, fmt.Sprintf(format, actualNumber), fmt.Sprintf("Formatting of: %v", tt.numberString))
 	}
 }