GaoreGo/cast
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Use single defined error for negatives

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Cameron Moore 2017-03-03 15:11:16 -06:00 committed by Bjørn Erik Pedersen
parent 758cd85768
commit 1ad7d3c5ed
1 changed files with 38 additions and 35 deletions
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73
caste.go
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@ -6,6 +6,7 @@
package cast package cast
import ( import (
"errors"
"fmt" "fmt"
"html/template" "html/template"
"reflect" "reflect"
@ -14,6 +15,8 @@ import (
"time" "time"
) )
var errNegativeNotAllowed = errors.New("unable to cast negative value")
// ToTimeE casts an interface to a time.Time type. // ToTimeE casts an interface to a time.Time type.
func ToTimeE(i interface{}) (tim time.Time, err error) { func ToTimeE(i interface{}) (tim time.Time, err error) {
i = indirect(i) i = indirect(i)
@ -425,27 +428,27 @@ func ToUintE(i interface{}) (uint, error) {
return 0, fmt.Errorf("unable to cast %#v to uint: %s", i, err) return 0, fmt.Errorf("unable to cast %#v to uint: %s", i, err)
case int: case int:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint") return 0, errNegativeNotAllowed
} }
return uint(s), nil return uint(s), nil
case int64: case int64:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint") return 0, errNegativeNotAllowed
} }
return uint(s), nil return uint(s), nil
case int32: case int32:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint") return 0, errNegativeNotAllowed
} }
return uint(s), nil return uint(s), nil
case int16: case int16:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint") return 0, errNegativeNotAllowed
} }
return uint(s), nil return uint(s), nil
case int8: case int8:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint") return 0, errNegativeNotAllowed
} }
return uint(s), nil return uint(s), nil
case uint: case uint:
@ -460,12 +463,12 @@ func ToUintE(i interface{}) (uint, error) {
return uint(s), nil return uint(s), nil
case float64: case float64:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint") return 0, errNegativeNotAllowed
} }
return uint(s), nil return uint(s), nil
case float32: case float32:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint") return 0, errNegativeNotAllowed
} }
return uint(s), nil return uint(s), nil
case bool: case bool:
@ -493,27 +496,27 @@ func ToUint64E(i interface{}) (uint64, error) {
return 0, fmt.Errorf("unable to cast %#v to uint64: %s", i, err) return 0, fmt.Errorf("unable to cast %#v to uint64: %s", i, err)
case int: case int:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint64") return 0, errNegativeNotAllowed
} }
return uint64(s), nil return uint64(s), nil
case int64: case int64:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint64") return 0, errNegativeNotAllowed
} }
return uint64(s), nil return uint64(s), nil
case int32: case int32:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint64") return 0, errNegativeNotAllowed
} }
return uint64(s), nil return uint64(s), nil
case int16: case int16:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint64") return 0, errNegativeNotAllowed
} }
return uint64(s), nil return uint64(s), nil
case int8: case int8:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint64") return 0, errNegativeNotAllowed
} }
return uint64(s), nil return uint64(s), nil
case uint: case uint:
@ -528,12 +531,12 @@ func ToUint64E(i interface{}) (uint64, error) {
return uint64(s), nil return uint64(s), nil
case float32: case float32:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint64") return 0, errNegativeNotAllowed
} }
return uint64(s), nil return uint64(s), nil
case float64: case float64:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint64") return 0, errNegativeNotAllowed
} }
return uint64(s), nil return uint64(s), nil
case bool: case bool:
@ -561,27 +564,27 @@ func ToUint32E(i interface{}) (uint32, error) {
return 0, fmt.Errorf("unable to cast %#v to uint32: %s", i, err) return 0, fmt.Errorf("unable to cast %#v to uint32: %s", i, err)
case int: case int:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint32") return 0, errNegativeNotAllowed
} }
return uint32(s), nil return uint32(s), nil
case int64: case int64:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint32") return 0, errNegativeNotAllowed
} }
return uint32(s), nil return uint32(s), nil
case int32: case int32:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint32") return 0, errNegativeNotAllowed
} }
return uint32(s), nil return uint32(s), nil
case int16: case int16:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint32") return 0, errNegativeNotAllowed
} }
return uint32(s), nil return uint32(s), nil
case int8: case int8:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint32") return 0, errNegativeNotAllowed
} }
return uint32(s), nil return uint32(s), nil
case uint: case uint:
@ -596,12 +599,12 @@ func ToUint32E(i interface{}) (uint32, error) {
return uint32(s), nil return uint32(s), nil
case float64: case float64:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint32") return 0, errNegativeNotAllowed
} }
return uint32(s), nil return uint32(s), nil
case float32: case float32:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint32") return 0, errNegativeNotAllowed
} }
return uint32(s), nil return uint32(s), nil
case bool: case bool:
@ -629,27 +632,27 @@ func ToUint16E(i interface{}) (uint16, error) {
return 0, fmt.Errorf("unable to cast %#v to uint16: %s", i, err) return 0, fmt.Errorf("unable to cast %#v to uint16: %s", i, err)
case int: case int:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint16") return 0, errNegativeNotAllowed
} }
return uint16(s), nil return uint16(s), nil
case int64: case int64:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint16") return 0, errNegativeNotAllowed
} }
return uint16(s), nil return uint16(s), nil
case int32: case int32:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint16") return 0, errNegativeNotAllowed
} }
return uint16(s), nil return uint16(s), nil
case int16: case int16:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint16") return 0, errNegativeNotAllowed
} }
return uint16(s), nil return uint16(s), nil
case int8: case int8:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint16") return 0, errNegativeNotAllowed
} }
return uint16(s), nil return uint16(s), nil
case uint: case uint:
@ -664,12 +667,12 @@ func ToUint16E(i interface{}) (uint16, error) {
return uint16(s), nil return uint16(s), nil
case float64: case float64:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint16") return 0, errNegativeNotAllowed
} }
return uint16(s), nil return uint16(s), nil
case float32: case float32:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint16") return 0, errNegativeNotAllowed
} }
return uint16(s), nil return uint16(s), nil
case bool: case bool:
@ -697,27 +700,27 @@ func ToUint8E(i interface{}) (uint8, error) {
return 0, fmt.Errorf("unable to cast %#v to uint8: %s", i, err) return 0, fmt.Errorf("unable to cast %#v to uint8: %s", i, err)
case int: case int:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint8") return 0, errNegativeNotAllowed
} }
return uint8(s), nil return uint8(s), nil
case int64: case int64:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint8") return 0, errNegativeNotAllowed
} }
return uint8(s), nil return uint8(s), nil
case int32: case int32:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint8") return 0, errNegativeNotAllowed
} }
return uint8(s), nil return uint8(s), nil
case int16: case int16:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint8") return 0, errNegativeNotAllowed
} }
return uint8(s), nil return uint8(s), nil
case int8: case int8:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint8") return 0, errNegativeNotAllowed
} }
return uint8(s), nil return uint8(s), nil
case uint: case uint:
@ -732,12 +735,12 @@ func ToUint8E(i interface{}) (uint8, error) {
return s, nil return s, nil
case float64: case float64:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint8") return 0, errNegativeNotAllowed
} }
return uint8(s), nil return uint8(s), nil
case float32: case float32:
if s < 0 { if s < 0 {
return 0, fmt.Errorf("unable to cast negative value to uint8") return 0, errNegativeNotAllowed
} }
return uint8(s), nil return uint8(s), nil
case bool: case bool: