Documentation
¶
Overview ¶
Package reflection extends reflect package with functions commonly used while using reflection functionality making it easier to call reflect method, set values, parse/convert values or use generic TypeOf.
Index ¶
- Variables
- func CastFieldValue(fieldType reflect.Type, rawValue any) (reflect.Value, bool)
- func GetFieldValueFor(fieldType reflect.Type, rawValue any) (reflect.Value, error)
- func InParamTypes(fn reflect.Type) []reflect.Type
- func OutParamTypes(fn reflect.Type) []reflect.Type
- func Parse(s string, target interface{}) (interface{}, error)
- func SetFieldValue(field reflect.Value, rawValue any) error
- func TogglePointer(u reflect.Type) reflect.Type
- func TypeOf[T any]() reflect.Type
Examples ¶
Constants ¶
This section is empty.
Variables ¶
var (
ErrNotAddresable = errors.New("field is not addressable")
)
var (
ErrNotSupportedType = errors.New("target type is not supported by parser")
)
Functions ¶
func CastFieldValue ¶ added in v0.12.0
CastFieldValue returns a reflect.Value which matches fieldType and value of rawValue. If rawValue type is different than fieldType then it's converted to match the type. If value cannot be converted to expected type, it'll report false together with last visited reflect.Value.
func GetFieldValueFor ¶
GetFieldValueFor returns a reflect.Value which matches fieldType and value of rawValue. If rawValue type is different than fieldType then it's converted or parsed to match the type. If value cannot be converted or parsed to expected type, it'll return an ErrNotSupportedType error.
func InParamTypes ¶
InParamTypes returns a function input parameter types. It returns nil if the 'fn' Kind is not Func.
func OutParamTypes ¶
OutParamTypesOf returns a function output parameter types. It returns nil if the 'fn' Kind is not Func.
func Parse ¶
Parse returns the parsed value with target type. s can be parsed to any of these types: string, int, float, complex, bool, time.Duration, time.Time, error. It accepts both pointer or non-pointer type. If s value is convertible to target it will return the converted value. Returns ErrNotSupportedType error if cannot parse to target value.
Example ¶
package main
import (
"fmt"
"github.com/Prastiwar/Go-flow/reflection"
)
func main() {
parsed, err := reflection.Parse("1", int8(0))
if err != nil {
panic(err)
}
asInt, ok := parsed.(int8)
fmt.Println(asInt, ok)
}
Output: 1 true
func SetFieldValue ¶
SetFieldValue calls GetFieldValueFor and sets got value directly to field or error if occurred. If rawValue is nil - it will not set nil value to field - use reflect.ValueOf(nil) in this case.
func TogglePointer ¶
TogglePointer if u kind is pointer, returns its element else returns u as pointer.
Types ¶
This section is empty.
Source Files
Directories