go/parser: correct channel conversion is not accepted

[griesemer]

package p
var c chan int
var x int = <-chan int(c)

produces a syntax error:

x.go:3:13: expected expression

but it should be interpreted as:

package p
var c chan int
var x int = <-(chan int)(c)

According to the spec, <-chan int(c) is not a conversion (
http://tip.golang.org/ref/spec#Conversions ); this is even true under consideration of
issue #4109 (documentation error in the spec).

The gc compiler accepts this code.

[griesemer]

Comment 1:

This issue was closed by revision 05dc3bf.

Status changed to Fixed.