all: rename GOEXPERIMENT=range to rangefunc

Range over integer is enabled now without the GOEXPERIMENT. The
GOEXPERIMENT is only for range over func. Rename it to rangefunc.

For #61405.

Change-Id: I9405fb8e2e30827875716786823856090a1a0cad
Reviewed-on: https://go-review.googlesource.com/c/go/+/539277
Reviewed-by: Russ Cox <rsc@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

src/cmd/compile/internal/types2/check_test.go

@@ -368,11 +368,11 @@ func TestIssue47243_TypedRHS(t *testing.T) {
 }
 
 func TestCheck(t *testing.T) {
-	old := buildcfg.Experiment.Range
+	old := buildcfg.Experiment.RangeFunc
 	defer func() {
-		buildcfg.Experiment.Range = old
+		buildcfg.Experiment.RangeFunc = old
 	}()
-	buildcfg.Experiment.Range = true
+	buildcfg.Experiment.RangeFunc = true
 
 	DefPredeclaredTestFuncs()
 	testDirFiles(t, "../../../../internal/types/testdata/check", 50, false) // TODO(gri) narrow column tolerance

src/cmd/compile/internal/types2/stmt.go

@@ -1009,7 +1009,7 @@ func rangeKeyVal(typ Type) (key, val Type, cause string, isFunc, ok bool) {
 		}
 		return typ.elem, nil, "", false, true
 	case *Signature:
-		if !buildcfg.Experiment.Range {
+		if !buildcfg.Experiment.RangeFunc {
 			break
 		}
 		assert(typ.Recv() == nil)

src/go/types/check_test.go

@@ -396,11 +396,11 @@ func TestIssue47243_TypedRHS(t *testing.T) {
 }
 
 func TestCheck(t *testing.T) {
-	old := buildcfg.Experiment.Range
+	old := buildcfg.Experiment.RangeFunc
 	defer func() {
-		buildcfg.Experiment.Range = old
+		buildcfg.Experiment.RangeFunc = old
 	}()
-	buildcfg.Experiment.Range = true
+	buildcfg.Experiment.RangeFunc = true
 
 	DefPredeclaredTestFuncs()
 	testDirFiles(t, "../../internal/types/testdata/check", false)

src/go/types/stmt.go

@@ -994,7 +994,7 @@ func rangeKeyVal(typ Type) (key, val Type, cause string, isFunc, ok bool) {
 		}
 		return typ.elem, nil, "", false, true
 	case *Signature:
-		if !buildcfg.Experiment.Range {
+		if !buildcfg.Experiment.RangeFunc {
 			break
 		}
 		assert(typ.Recv() == nil)

src/internal/goexperiment/exp_range_off.go

@@ -1,8 +0,0 @@
-// Code generated by mkconsts.go. DO NOT EDIT.
-
-//go:build !goexperiment.range
-
-package goexperiment
-
-const Range = false
-const RangeInt = 0

src/internal/goexperiment/exp_range_on.go

@@ -1,8 +0,0 @@
-// Code generated by mkconsts.go. DO NOT EDIT.
-
-//go:build goexperiment.range
-
-package goexperiment
-
-const Range = true
-const RangeInt = 1

src/internal/goexperiment/exp_rangefunc_off.go

@@ -0,0 +1,8 @@
+// Code generated by mkconsts.go. DO NOT EDIT.
+
+//go:build !goexperiment.rangefunc
+
+package goexperiment
+
+const RangeFunc = false
+const RangeFuncInt = 0

src/internal/goexperiment/exp_rangefunc_on.go

@@ -0,0 +1,8 @@
+// Code generated by mkconsts.go. DO NOT EDIT.
+
+//go:build goexperiment.rangefunc
+
+package goexperiment
+
+const RangeFunc = true
+const RangeFuncInt = 1

src/internal/goexperiment/flags.go

@@ -114,6 +114,6 @@ type Flags struct {
 	// inlining phase within the Go compiler.
 	NewInliner bool
 
-	// Range enables range over int and func.
-	Range bool
+	// RangeFunc enables range over func.
+	RangeFunc bool
 }

src/internal/types/testdata/spec/range.go

@@ -1,4 +1,4 @@
-// -goexperiment=range
+// -goexperiment=rangefunc
 
 // Copyright 2023 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

test/range2.go

@@ -1,4 +1,4 @@
-// errorcheck -goexperiment range
+// errorcheck -goexperiment rangefunc
 
 // Copyright 2023 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

test/range4.go

@@ -1,4 +1,4 @@
-// run -goexperiment range
+// run -goexperiment rangefunc
 
 // Copyright 2023 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

test/rangegen.go

@@ -1,4 +1,4 @@
-// runoutput -goexperiment range
+// runoutput -goexperiment rangefunc
 
 // Copyright 2023 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style