feat: support func fields in literal struct (#103)

* test: make select2 deterministic

_test/select2.go

@@ -15,17 +15,21 @@ func main() {
 		case c2 <- toSend:
 			a++
 		}
+		c1 <- "done"
 	}()
 
-	select {
-	case msg1 := <-c1:
-		fmt.Println("received from c1:", msg1)
-	case msg2 := <-c2:
-		fmt.Println("received from c2:", msg2)
+	for i := 0; i < 2; i++ {
+		select {
+		case msg1 := <-c1:
+			fmt.Println("received from c1:", msg1)
+		case msg2 := <-c2:
+			fmt.Println("received from c2:", msg2)
+		}
 	}
 	fmt.Println("Bye", a)
 }
 
 // Output:
 // received from c2: hello
+// received from c1: done
 // Bye 1

interp/interp_eval_test.go

@@ -144,8 +144,6 @@ func f() string {
 }
 
 func TestEvalStruct1(t *testing.T) {
-	t.Skip("not yet implemented")
-	log.SetFlags(log.Lshortfile)
 	i := interp.New(interp.Opt{})
 	evalCheck(t, i, `
 type Fromage struct {

interp/interp_test.go

@@ -5641,13 +5641,16 @@ func main() {
 		case c2 <- toSend:
 			a++
 		}
+		c1 <- "done"
 	}()
 
-	select {
-	case msg1 := <-c1:
-		fmt.Println("received from c1:", msg1)
-	case msg2 := <-c2:
-		fmt.Println("received from c2:", msg2)
+	for i := 0; i < 2; i++ {
+		select {
+		case msg1 := <-c1:
+			fmt.Println("received from c1:", msg1)
+		case msg2 := <-c2:
+			fmt.Println("received from c2:", msg2)
+		}
 	}
 	fmt.Println("Bye", a)
 }
@@ -5661,6 +5664,7 @@ func main() {
 
 	// Output:
 	// received from c2: hello
+	// received from c1: done
 	// Bye 1
 }
 

interp/run.go

@@ -1031,7 +1031,11 @@ func compositeLit(n *Node) {
 	values := make([]func(*Frame) reflect.Value, len(child))
 	for i, c := range child {
 		convertLiteralValue(c, n.typ.field[i].typ.TypeOf())
-		values[i] = genValue(c)
+		if c.typ.cat == FuncT {
+			values[i] = genNodeWrapper(c)
+		} else {
+			values[i] = genValue(c)
+		}
 	}
 
 	n.exec = func(f *Frame) Builtin {