// ChanType = ( "chan" [ "<-" ] | "<-" "chan" ) Type .
//
func (p *parser) parseChanType() types.Type {
dir := types.SendRecv
if p.tok == scanner.Ident {
p.expectKeyword("chan")
if p.tok == '<' {
p.expectSpecial("<-")
dir = types.SendOnly
}
} else {
p.expectSpecial("<-")
p.expectKeyword("chan")
dir = types.RecvOnly
}
elem := p.parseType()
return types.NewChan(dir, elem)
}
// - test hashcodes are consistent with equals for a range of types
// (e.g. all types generated by type-checking some body of real code).
import (
"testing"
"github.com/nathankerr/godocbook/Godeps/_workspace/src/code.google.com/p/go.tools/go/types"
"github.com/nathankerr/godocbook/Godeps/_workspace/src/code.google.com/p/go.tools/go/types/typeutil"
)
var (
tStr = types.Typ[types.String] // string
tPStr1 = types.NewPointer(tStr) // *string
tPStr2 = types.NewPointer(tStr) // *string, again
tInt = types.Typ[types.Int] // int
tChanInt1 = types.NewChan(types.RecvOnly, tInt) // <-chan int
tChanInt2 = types.NewChan(types.RecvOnly, tInt) // <-chan int, again
)
func checkEqualButNotIdentical(t *testing.T, x, y types.Type, comment string) {
if !types.Identical(x, y) {
t.Errorf("%s: not equal: %s, %s", comment, x, y)
}
if x == y {
t.Errorf("%s: identical: %v, %v", comment, x, y)
}
}
func TestAxioms(t *testing.T) {
checkEqualButNotIdentical(t, tPStr1, tPStr2, "tPstr{1,2}")
checkEqualButNotIdentical(t, tChanInt1, tChanInt2, "tChanInt{1,2}")