exp/template: parse variables and declarations
R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/4631099
diff --git a/src/pkg/exp/template/parse_test.go b/src/pkg/exp/template/parse_test.go
index 71580f8..7026795 100644
--- a/src/pkg/exp/template/parse_test.go
+++ b/src/pkg/exp/template/parse_test.go
@@ -146,10 +146,16 @@
`[(action: [(command: [F=[X]])])]`},
{"simple command", "{{printf}}", noError,
`[(action: [(command: [I=printf])])]`},
+ {"variable invocation", "{{$x 23}}", noError,
+ "[(action: [(command: [V=$x N=23])])]"},
{"multi-word command", "{{printf `%d` 23}}", noError,
"[(action: [(command: [I=printf S=`%d` N=23])])]"},
{"pipeline", "{{.X|.Y}}", noError,
`[(action: [(command: [F=[X]]) (command: [F=[Y]])])]`},
+ {"pipeline with decl", "{{$x := .X|.Y}}", noError,
+ `[(action: $x := [(command: [F=[X]]) (command: [F=[Y]])])]`},
+ {"declaration", "{{.X|.Y}}", noError,
+ `[(action: [(command: [F=[X]]) (command: [F=[Y]])])]`},
{"simple if", "{{if .X}}hello{{end}}", noError,
`[({{if [(command: [F=[X]])]}} [(text: "hello")])]`},
{"if with else", "{{if .X}}true{{else}}false{{end}}", noError,
