diff options
Diffstat (limited to 'src/reflect/type.go')
| -rw-r--r-- | src/reflect/type.go | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/reflect/type.go b/src/reflect/type.go index 38b1283d42..44c96fea82 100644 --- a/src/reflect/type.go +++ b/src/reflect/type.go @@ -1789,7 +1789,6 @@ func ChanOf(dir ChanDir, t Type) Type { } // Look in known types. - // TODO: Precedence when constructing string. var s string switch dir { default: @@ -1799,7 +1798,16 @@ func ChanOf(dir ChanDir, t Type) Type { case RecvDir: s = "<-chan " + typ.String() case BothDir: - s = "chan " + typ.String() + typeStr := typ.String() + if typeStr[0] == '<' { + // typ is recv chan, need parentheses as "<-" associates with leftmost + // chan possible, see: + // * https://golang.org/ref/spec#Channel_types + // * https://github.com/golang/go/issues/39897 + s = "chan (" + typeStr + ")" + } else { + s = "chan " + typeStr + } } for _, tt := range typesByString(s) { ch := (*chanType)(unsafe.Pointer(tt)) |