Updated to bitflags 2.2.1. (#138)

* Updated to bitflags 2.2.1.

* Don't derive so many traits for ProtocolFeatures.

* Update to bitflags 2.3.1.

* Use external version of bitflags macro.

Cargo.toml

@@ -14,7 +14,7 @@ categories = ["development-tools::debugging", "embedded", "emulators", "network-
 exclude = ["examples/**/*.elf", "examples/**/*.o"]
 
 [dependencies]
-bitflags = "1.3"
+bitflags = "2.3.1"
 cfg-if = "1.0"
 log = "0.4"
 managed = { version = "0.8", default-features = false }

src/stub/core_impl.rs

@@ -249,11 +249,15 @@ impl<T: Target, C: Connection> GdbStubImpl<T, C> {
     }
 }
 
+#[derive(Copy, Clone)]
+#[repr(transparent)]
+struct ProtocolFeatures(u8);
+
 // This bitflag is not part of the protocol - it is an internal implementation
 // detail. The alternative would be to use multiple `bool` fields, which wastes
 // space in minimal `gdbstub` configurations.
 bitflags::bitflags! {
-    struct ProtocolFeatures: u8 {
+    impl ProtocolFeatures: u8 {
         const NO_ACK_MODE = 1 << 0;
         const MULTIPROCESS = 1 << 1;
     }

src/target/ext/host_io.rs

@@ -3,14 +3,18 @@ use crate::arch::Arch;
 use crate::target::Target;
 use bitflags::bitflags;
 
+/// Host flags for opening files.
+///
+/// Extracted from the GDB documentation at
+/// [Open Flags](https://sourceware.org/gdb/current/onlinedocs/gdb/Open-Flags.html#Open-Flags),
+/// and the LLDB source code at
+/// [`lldb/include/lldb/Host/File.h`](https://github.com/llvm/llvm-project/blob/ec642ceebc1aacc8b16249df7734b8cf90ae2963/lldb/include/lldb/Host/File.h#L47-L66)
+#[derive(Copy, Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
+#[repr(transparent)]
+pub struct HostIoOpenFlags(u32);
+
 bitflags! {
-    /// Host flags for opening files.
-    ///
-    /// Extracted from the GDB documentation at
-    /// [Open Flags](https://sourceware.org/gdb/current/onlinedocs/gdb/Open-Flags.html#Open-Flags),
-    /// and the LLDB source code at
-    /// [`lldb/include/lldb/Host/File.h`](https://github.com/llvm/llvm-project/blob/ec642ceebc1aacc8b16249df7734b8cf90ae2963/lldb/include/lldb/Host/File.h#L47-L66)
-    pub struct HostIoOpenFlags: u32 {
+    impl HostIoOpenFlags: u32 {
         /// A read-only file.
         const O_RDONLY = 0x0;
         /// A write-only file.
@@ -37,12 +41,16 @@ bitflags! {
     }
 }
 
+/// Host file permissions.
+///
+/// Extracted from the GDB documentation at
+/// [mode_t Values](https://sourceware.org/gdb/current/onlinedocs/gdb/mode_005ft-Values.html#mode_005ft-Values)
+#[derive(Copy, Clone, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
+#[repr(transparent)]
+pub struct HostIoOpenMode(u32);
+
 bitflags! {
-    /// Host file permissions.
-    ///
-    /// Extracted from the GDB documentation at
-    /// [mode_t Values](https://sourceware.org/gdb/current/onlinedocs/gdb/mode_005ft-Values.html#mode_005ft-Values)
-    pub struct HostIoOpenMode: u32 {
+    impl HostIoOpenMode: u32 {
         /// A regular file.
         const S_IFREG = 0o100000;
         /// A directory.