strconv.ParseIntbitSize parameter
を使用する
package main
import (
"fmt"
"strconv"
)
// 32 or 64 depending on platform
const IntBits = 1 << (^uint(0)>>32&1 + ^uint(0)>>16&1 + ^uint(0)>>8&1 + 3)
func printInt(i int) {
fmt.Println(i)
}
func main() {
s := "-123123112323231231"
i64, err := strconv.ParseInt(s, 10, IntBits)
if err != nil {
fmt.Println("parsing failed for ", s)
}
i := int(i64)
printInt(i)
i64, err = strconv.ParseInt(s, 10, 32)
if err != nil {
fmt.Println("parsing failed for ", s)
}
i = int(i64)
printInt(i)
}
遊び場
出力
-123123112323231231
parsing failed for -123123112323231231
-2147483648