gc: add ... T, rework plain ...

No longer a distinct type; now a property of func types.

R=ken2
CC=golang-dev
https://golang.org/cl/197042

1 files changed, 105 insertions, 0 deletions

diff --git a/test/ddd.go b/test/ddd.go
new file mode 100644
index 0000000000..682f22ffe3
--- /dev/null
+++ b/test/ddd.go
@@ -0,0 +1,105 @@
+// $G $D/$F.go && $L $F.$A && ./$A.out
+
+// Copyright 2010 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+func sum(args ...int) int {
+	s := 0
+	for _, v := range args {
+		s += v
+	}
+	return s
+}
+
+func sumA(args []int) int {
+	s := 0
+	for _, v := range args {
+		s += v
+	}
+	return s
+}
+
+func sum2(args ...int) int { return 2 * sum(args) }
+
+func sum3(args ...int) int { return 3 * sumA(args) }
+
+func intersum(args ...interface{}) int {
+	s := 0
+	for _, v := range args {
+		s += v.(int)
+	}
+	return s
+}
+
+type T []T
+
+func ln(args ...T) int { return len(args) }
+
+func ln2(args ...T) int { return 2 * ln(args) }
+
+func main() {
+	if x := sum(1, 2, 3); x != 6 {
+		panicln("sum 6", x)
+	}
+	if x := sum(); x != 0 {
+		panicln("sum 0", x)
+	}
+	if x := sum(10); x != 10 {
+		panicln("sum 10", x)
+	}
+	if x := sum(1, 8); x != 9 {
+		panicln("sum 9", x)
+	}
+	if x := sum2(1, 2, 3); x != 2*6 {
+		panicln("sum 6", x)
+	}
+	if x := sum2(); x != 2*0 {
+		panicln("sum 0", x)
+	}
+	if x := sum2(10); x != 2*10 {
+		panicln("sum 10", x)
+	}
+	if x := sum2(1, 8); x != 2*9 {
+		panicln("sum 9", x)
+	}
+	if x := sum3(1, 2, 3); x != 3*6 {
+		panicln("sum 6", x)
+	}
+	if x := sum3(); x != 3*0 {
+		panicln("sum 0", x)
+	}
+	if x := sum3(10); x != 3*10 {
+		panicln("sum 10", x)
+	}
+	if x := sum3(1, 8); x != 3*9 {
+		panicln("sum 9", x)
+	}
+	if x := intersum(1, 2, 3); x != 6 {
+		panicln("intersum 6", x)
+	}
+	if x := intersum(); x != 0 {
+		panicln("intersum 0", x)
+	}
+	if x := intersum(10); x != 10 {
+		panicln("intersum 10", x)
+	}
+	if x := intersum(1, 8); x != 9 {
+		panicln("intersum 9", x)
+	}
+
+	if x := ln(nil, nil, nil); x != 3 {
+		panicln("ln 3", x)
+	}
+	if x := ln([]T{}); x != 1 {
+		panicln("ln 1", x)
+	}
+	if x := ln2(nil, nil, nil); x != 2*3 {
+		panicln("ln2 3", x)
+	}
+	if x := ln2([]T{}); x != 2*1 {
+		panicln("ln2 1", x)
+	}
+}