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cmd/vet: remove dependency on go/ast/astutil

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This package was only imported for the trivial Unparen function.

Change-Id: I0ead916a7fdb469a26b4fe99c6964a8ed1438c49
Reviewed-on: https://go-review.googlesource.com/8566
Reviewed-by: Rob Pike <r@golang.org>
This commit is contained in:
Robert Griesemer 2015-04-07 13:19:34 -07:00
parent 0770aced4f
commit 48e2a5be44
1 changed files with 12 additions and 3 deletions
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15
cmd/vet/bool.go
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@ -9,8 +9,6 @@ package main
import (
"go/ast"
"go/token"
"golang.org/x/tools/go/ast/astutil"
)
func init() {
@ -164,7 +162,7 @@ func hasSideEffects(e ast.Expr) bool {
// split returns []{d, c, b, a}.
func (op boolOp) split(e ast.Expr) (exprs []ast.Expr) {
for {
e = astutil.Unparen(e)
e = unparen(e)
if b, ok := e.(*ast.BinaryExpr); ok && b.Op == op.tok {
exprs = append(exprs, op.split(b.Y)...)
e = b.X
@ -175,3 +173,14 @@ func (op boolOp) split(e ast.Expr) (exprs []ast.Expr) {
}
return
}
// unparen returns e with any enclosing parentheses stripped.
func unparen(e ast.Expr) ast.Expr {
for {
p, ok := e.(*ast.ParenExpr)
if !ok {
return e
}
e = p.X
}
}