github.com/traefik/yaegi@v0.15.1/interp/hooks.go (about)

     1  package interp
     2  
     3  import "reflect"
     4  
     5  // convertFn is the signature of a symbol converter.
     6  type convertFn func(from, to reflect.Type) func(src, dest reflect.Value)
     7  
     8  // hooks are external symbol bindings.
     9  type hooks struct {
    10  	convert []convertFn
    11  }
    12  
    13  func (h *hooks) Parse(m map[string]reflect.Value) {
    14  	if con, ok := getConvertFn(m["convert"]); ok {
    15  		h.convert = append(h.convert, con)
    16  	}
    17  }
    18  
    19  func getConvertFn(v reflect.Value) (convertFn, bool) {
    20  	if !v.IsValid() {
    21  		return nil, false
    22  	}
    23  	fn, ok := v.Interface().(func(from, to reflect.Type) func(src, dest reflect.Value))
    24  	if !ok {
    25  		return nil, false
    26  	}
    27  	return fn, true
    28  }