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go/parser: accept parenthesized receive operations in select statements

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R=rsc
CC=golang-dev
https://golang.org/cl/4439082
This commit is contained in:
Robert Griesemer 2011-04-29 13:06:03 -07:00
parent c134718611
commit 0d1f76ded2
2 changed files with 1 additions and 4 deletions
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4
src/pkg/go/parser/parser.go
View File

@ -1780,10 +1780,6 @@ func (p *parser) parseCommClause() *ast.CommClause {
rhs = lhs[0] rhs = lhs[0]
lhs = nil // there is no lhs lhs = nil // there is no lhs
} }
if x, isUnary := rhs.(*ast.UnaryExpr); !isUnary || x.Op != token.ARROW {
p.errorExpected(rhs.Pos(), "send or receive operation")
rhs = &ast.BadExpr{rhs.Pos(), rhs.End()}
}
if lhs != nil { if lhs != nil {
comm = &ast.AssignStmt{lhs, pos, tok, []ast.Expr{rhs}} comm = &ast.AssignStmt{lhs, pos, tok, []ast.Expr{rhs}}
} else { } else {

1
src/pkg/go/parser/parser_test.go
View File

@ -51,6 +51,7 @@ var validPrograms = []interface{}{
`package p; type T []int; func f() { for _ = range []int{T{42}[0]} {} };`, `package p; type T []int; func f() { for _ = range []int{T{42}[0]} {} };`,
`package p; var a = T{{1, 2}, {3, 4}}`, `package p; var a = T{{1, 2}, {3, 4}}`,
`package p; func f() { select { case <- c: case c <- d: case c <- <- d: case <-c <- d: } };`, `package p; func f() { select { case <- c: case c <- d: case c <- <- d: case <-c <- d: } };`,
`package p; func f() { select { case x := (<-c): } };`,
`package p; func f() { if ; true {} };`, `package p; func f() { if ; true {} };`,
`package p; func f() { switch ; {} };`, `package p; func f() { switch ; {} };`,
} }