initial import

.gitignore

@@ -0,0 +1 @@
+.idea/

cmd/qdiimpl/jenutil.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"fmt"
+	"go/types"
+
+	"github.com/dave/jennifer/jen"
+)
+
+func getQualCode(typ types.Type) *jen.Statement {
+	var st jen.Statement
+	for {
+		switch tt := typ.(type) {
+		case *types.Named:
+			if tt.Obj().Pkg() != nil {
+				return st.Add(jen.Qual(tt.Obj().Pkg().Path(), tt.Obj().Name()).TypesFunc(addTypeList(tt.TypeArgs())))
+			}
+			return st.Add(jen.Id(tt.Obj().Name()).TypesFunc(addTypeList(tt.TypeArgs())))
+		case *types.Interface:
+			return st.Add(jen.Id(tt.String()))
+		case *types.Basic:
+			return st.Add(jen.Id(tt.Name()))
+		case *types.TypeParam:
+			return st.Add(jen.Id(tt.Obj().Name()))
+		case *types.Pointer:
+			st.Add(jen.Op("*"))
+			typ = tt.Elem()
+		case *types.Slice:
+			return st.Add(jen.Index().Add(getQualCode(tt.Elem())))
+		case *types.Map:
+			return st.Add(jen.Map(getQualCode(tt.Key())).Add(getQualCode(tt.Elem())))
+		default:
+			panic(fmt.Errorf("unknown type %T", typ))
+		}
+	}
+}
+
+func addTypeParamsList(typeList *types.TypeParamList, withType bool) func(*jen.Group) {
+	return func(tgroup *jen.Group) {
+		for t := 0; t < typeList.Len(); t++ {
+			tparam := typeList.At(t)
+			if withType {
+				tgroup.Id(tparam.Obj().Name()).Add(getQualCode(tparam.Constraint()))
+			} else {
+				tgroup.Id(tparam.Obj().Name())
+			}
+		}
+	}
+}
+
+func addTypeList(typeList *types.TypeList) func(*jen.Group) {
+	return func(tgroup *jen.Group) {
+		for t := 0; t < typeList.Len(); t++ {
+			tparam := typeList.At(t)
+			tgroup.Add(getQualCode(tparam))
+		}
+	}
+}