feat: add ToBigInt

convertor/convertor.go

@@ -14,11 +14,13 @@ import (
 	"fmt"
 	"io"
 	"math"
+	"math/big"
 	"reflect"
 	"strconv"
 	"strings"
 
 	"github.com/duke-git/lancet/v2/structs"
+	"golang.org/x/exp/constraints"
 	"golang.org/x/text/encoding/simplifiedchinese"
 	"golang.org/x/text/transform"
 )
@@ -483,3 +485,36 @@ func ToRawUrlBase64(value any) string {
 		return base64.RawURLEncoding.EncodeToString(marshal)
 	}
 }
+
+// ToBigInt converts an integer of any supported type (int, int64, uint64, etc.) to *big.Int
+// Play: todo
+func ToBigInt[T constraints.Integer](v T) (*big.Int, error) {
+	result := new(big.Int)
+
+	switch v := any(v).(type) {
+	case int:
+		result.SetInt64(int64(v)) // Convert to int64 for big.Int
+	case int8:
+		result.SetInt64(int64(v))
+	case int16:
+		result.SetInt64(int64(v))
+	case int32:
+		result.SetInt64(int64(v))
+	case int64:
+		result.SetInt64(v)
+	case uint:
+		result.SetUint64(uint64(v)) // Convert to uint64 for big.Int
+	case uint8:
+		result.SetUint64(uint64(v))
+	case uint16:
+		result.SetUint64(uint64(v))
+	case uint32:
+		result.SetUint64(uint64(v))
+	case uint64:
+		result.SetUint64(v)
+	default:
+		return nil, fmt.Errorf("unsupported type: %T", v)
+	}
+
+	return result, nil
+}