strconv.ParseFloat value out of range (big.Int)

[razorbohan]

System (please complete the following information):

• OS: macOS 14.6.1
• GO Version: 1.21.6
• Pkg Version: 2.2.5

Describe the bug

The library emits error trying to parse big.Int value:

strconv.ParseFloat: parsing "23707729876828933003792990320594511132013137629744363463325945636682800546201191581706241551352734654762086038344743940857801503840360878427584255703013924373301145683882034301334533678253123777083489887967659929148298684008991665609773532863485728577470710590688325197694460521376123072613857785739366064688074459399408762960887169067851291291611970194076234580897060365318108861340336375060983779163595033605894055218557648363640361256922411962394084268360413547861005069585285713253756167043430574673046032573767256949834558011358364591391964981157578571244295339467926678988648036459748021538498339258036608168313": value out of range

My guess is that it is because the lib is trying to parse it to that type of object:

data := make(map[string]any) // parseSourceToMap function (load.go, line 505)

To Reproduce

Have a json file (configPath) with a big.Int value in any field

config.AddDriver(json.Driver)
config.WithOptions(config.ParseDefault)
if err := config.LoadFiles(configPath); err != nil { // <- returns error
     return err
}

Expected behavior

A big.Int variable successfully parsed

[inhere]

hi @razorbohan The error is from the encoding/json package.

You can custom driver for parse the json. such as:

	s := `{
			"key": 23707729876828933003792990320594511132013137629744363463325945636682800546201191581706241551352734654762086038344743940857801503840360878427584255703013924373301145683882034301334533678253123777083489887967659929148298684008991665609773532863485728577470710590688325197694460521376123072613857785739366064688074459399408762960887169067851291291611970194076234580897060365318108861340336375060983779163595033605894055218557648363640361256922411962394084268360413547861005069585285713253756167043430574673046032573767256949834558011358364591391964981157578571244295339467926678988648036459748021538498339258036608168313
		}`

	jsd := config.NewDriver("json", func(blob []byte, v any) (err error) {
		jnd := json.NewDecoder(bytes.NewReader(blob))
		jnd.UseNumber()
		return jnd.Decode(v)
	}, config.JSONEncoder)
	cfg1 := config.NewEmpty("test1").WithDriver(jsd)
	err = cfg1.LoadStrings(config.JSON, s)
	assert.NoErr(t, err)
	dump.P(cfg1.Data())

	// to big.Int
	bi := new(big.Int)
	_, ok := bi.SetString(cfg1.String("key"), 10)
	assert.True(t, ok)

Output:

=== RUN   TestIssues_192
PRINT AT github.com/gookit/config/v2_test.TestIssues_192(issues_test.go:632)
map[string]interface {} { #len=1
  "key": json.Number("23707729876828933003792990320594511132013137629744363463325945636682800546201191581706241551352734654762086038344743940857801503840360878427584255703013924373301145683882034301334533678253123777083489887967659929148298684008991665609773532863485728577470710590688325197694460521376123072613857785739366064688074459399408762960887169067851291291611970194076234580897060365318108861340336375060983779163595033605894055218557648363640361256922411962394084268360413547861005069585285713253756167043430574673046032573767256949834558011358364591391964981157578571244295339467926678988648036459748021538498339258036608168313"), #len=617
},
--- PASS: TestIssues_192 (0.00s)

[inhere]

@razorbohan Or do you have other solutions?