gotypes

gotypes/gotypes.go

@@ -0,0 +1,22 @@
+package gotypes
+
+import (
+	"errors"
+	"go/token"
+	"go/types"
+)
+
+func ParseSignature(expr string) (*types.Signature, error) {
+	tv, err := types.Eval(token.NewFileSet(), nil, token.NoPos, expr)
+	if err != nil {
+		return nil, err
+	}
+	if tv.Value != nil {
+		return nil, errors.New("signature expression should have nil value")
+	}
+	s, ok := tv.Type.(*types.Signature)
+	if !ok {
+		return nil, errors.New("provided type is not a function signature")
+	}
+	return s, nil
+}