Documentation
¶
Overview ¶
Small library on top of reflect for make lookups to Structs or Maps. Using a very simple DSL you can access to any property, key or value of any value of Go.
Index ¶
- Constants
- Variables
- func FieldByTagName(ty reflect.Type, key string) (*reflect.StructField, bool)
- func Lookup(i interface{}, path ...string) (reflect.Value, error)
- func LookupString(i interface{}, path string) (reflect.Value, error)
- func Set(object interface{}, key, val string) error
- func ValueByTagName(v reflect.Value, key string) (reflect.Value, bool)
Examples ¶
Constants ¶
View Source
const ( SplitToken = "." IndexCloseChar = "]" IndexOpenChar = "[" )
Variables ¶
Functions ¶
func FieldByTagName ¶
func Lookup ¶
Lookup performs a lookup into a value, using a path of keys. The key should match with a Field or a MapIndex. For slice you can use the syntax key[index] to access a specific index. If one key owns to a slice and an index is not specificied the rest of the path will be apllied to evaley value of the slice, and the value will be merged into a slice.
Example ¶
type ExampleStruct struct {
Values struct {
Foo int
}
}
i := ExampleStruct{}
i.Values.Foo = 10
value, _ := Lookup(i, "Values", "Foo")
fmt.Println(value.Interface())
Output: 10
func LookupString ¶
LookupString performs a lookup into a value, using a string. Same as `Loookup` but using a string with the keys separated by `.`
Example ¶
type Cast struct {
Actor, Role string
}
type Serie struct {
Cast []Cast
}
series := map[string]Serie{
"A-Team": {Cast: []Cast{
{Actor: "George Peppard", Role: "Hannibal"},
{Actor: "Dwight Schultz", Role: "Murdock"},
{Actor: "Mr. T", Role: "Baracus"},
{Actor: "Dirk Benedict", Role: "Faceman"},
}},
}
q := "A-Team.Cast.Role"
value, _ := LookupString(series, q)
fmt.Println(q, "->", value.Interface())
q = "A-Team.Cast[0].Actor"
value, _ = LookupString(series, q)
fmt.Println(q, "->", value.Interface())
Output: A-Team.Cast.Role -> [Hannibal Murdock Baracus Faceman] A-Team.Cast[0].Actor -> George Peppard
Types ¶
This section is empty.
Source Files
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