libgo: update to Go1.18beta2

gotools/
	* Makefile.am (go_cmd_cgo_files): Add ast_go118.go
	(check-go-tool): Copy golang.org/x/tools directories.
	* Makefile.in: Regenerate.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/384695

1 files changed, 12 insertions, 2 deletions

diff --git a/libgo/go/builtin/builtin.go b/libgo/go/builtin/builtin.go
index 01190e9..08ae7ed 100644
--- a/libgo/go/builtin/builtin.go
+++ b/libgo/go/builtin/builtin.go
@@ -91,6 +91,16 @@ type byte = uint8
 // used, by convention, to distinguish character values from integer values.
 type rune = int32
 
+// any is an alias for interface{} and is equivalent to interface{} in all ways.
+type any = interface{}
+
+// comparable is an interface that is implemented by all comparable types
+// (booleans, numbers, strings, pointers, channels, interfaces,
+// arrays of comparable types, structs whose fields are all comparable types).
+// The comparable interface may only be used as a type parameter constraint,
+// not as the type of a variable.
+type comparable comparable
+
 // iota is a predeclared identifier representing the untyped integer ordinal
 // number of the current const specification in a (usually parenthesized)
 // const declaration. It is zero-indexed.
@@ -229,7 +239,7 @@ func close(c chan<- Type)
 // that point, the program is terminated with a non-zero exit code. This
 // termination sequence is called panicking and can be controlled by the
 // built-in function recover.
-func panic(v interface{})
+func panic(v any)
 
 // The recover built-in function allows a program to manage behavior of a
 // panicking goroutine. Executing a call to recover inside a deferred
@@ -240,7 +250,7 @@ func panic(v interface{})
 // panicking, or if the argument supplied to panic was nil, recover returns
 // nil. Thus the return value from recover reports whether the goroutine is
 // panicking.
-func recover() interface{}
+func recover() any
 
 // The print built-in function formats its arguments in an
 // implementation-specific way and writes the result to standard error.