Commit cc2dcce3 authored by Robert Griesemer's avatar Robert Griesemer

[dev.typealias] cmd/compile: a few better comments related to alias types

For #18130.

Change-Id: I50bded3af0db673fc92b20c41a86b9cae614acd9
Reviewed-on: https://go-review.googlesource.com/35191Reviewed-by: default avatarMatthew Dempsky <mdempsky@google.com>
parent 5c160b28
......@@ -284,7 +284,7 @@ type Param struct {
//
// TODO: Should Func pragmas also be stored on the Name?
Pragma Pragma
Alias bool // node is alias for Ntype
Alias bool // node is alias for Ntype (only used when type-checking ODCLTYPE)
}
// Func holds Node fields used only with function-like nodes.
......
......@@ -398,6 +398,14 @@ func lexinit1() {
// errortype.Orig = makeErrorInterface()
s.Def = typenod(errortype)
// We create separate byte and rune types for better error messages
// rather than just creating type alias *Sym's for the uint8 and
// int32 types. Hence, (bytetype|runtype).Sym.isAlias() is false.
// TODO(gri) Should we get rid of this special case (at the cost
// of less informative error messages involving bytes and runes)?
// (Alternatively, we could introduce an OTALIAS node representing
// type aliases, albeit at the cost of having to deal with it everywhere).
// byte alias
s = Pkglookup("byte", builtinpkg)
bytetype = typ(TUINT8)
......
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