eval: (*evalCtx).copy -> fork

eval/builtin_func.go

@@ -297,7 +297,7 @@ func each(ec *evalCtx, f *closure) exitus {
 	in := ec.ports[0].ch
 in:
 	for v := range in {
-		e := f.Exec(ec.copy("closure of each"), []Value{v})
+		e := f.Exec(ec.fork("closure of each"), []Value{v})
 		switch e.Sort {
 		case Ok, Continue:
 			// nop

eval/compile.go

@@ -81,7 +81,7 @@ func (cp *compiler) pipeline(n *parse.Pipeline) valuesOp {
 
 		// For each form, create a dedicated evalCtx and run asynchronously
 		for i, op := range ops {
-			newEc := ec.copy(fmt.Sprintf("form op %v", op))
+			newEc := ec.fork(fmt.Sprintf("form op %v", op))
 			if i > 0 {
 				newEc.ports[0] = nextIn
 			}
@@ -444,7 +444,7 @@ func (cp *compiler) outputCapture(n *parse.Primary) valuesOp {
 	p := n.Chunk.Begin()
 	return func(ec *evalCtx) []Value {
 		vs := []Value{}
-		newEc := ec.copy(fmt.Sprintf("channel output capture %v", op))
+		newEc := ec.fork(fmt.Sprintf("channel output capture %v", op))
 
 		pipeRead, pipeWrite, err := os.Pipe()
 		if err != nil {

eval/eval.go

@@ -143,10 +143,10 @@ func newTopEvalCtx(ev *Evaler, name, text string) (*evalCtx, chan bool) {
 	}, done
 }
 
-// copy returns a copy of ec. The ports are copied deeply, with shouldClose
-// flags reset, and the context is changed to the given value. Other fields are
-// copied shallowly.
-func (ec *evalCtx) copy(newContext string) *evalCtx {
+// fork returns a modified copy of ec. The ports are copied deeply, with
+// shouldClose flags reset, and the context is changed to the given value.
+// Other fields are copied shallowly.
+func (ec *evalCtx) fork(newContext string) *evalCtx {
 	newPorts := make([]*port, len(ec.ports))
 	for i, p := range ec.ports {
 		newPorts[i] = &port{p.f, p.ch, false, false}