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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /compiler/rustc_data_structures/src/macros.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'compiler/rustc_data_structures/src/macros.rs')
-rw-r--r-- | compiler/rustc_data_structures/src/macros.rs | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/compiler/rustc_data_structures/src/macros.rs b/compiler/rustc_data_structures/src/macros.rs new file mode 100644 index 000000000..e05491f6f --- /dev/null +++ b/compiler/rustc_data_structures/src/macros.rs @@ -0,0 +1,37 @@ +#[macro_export] +macro_rules! enum_from_u32 { + ($(#[$attr:meta])* pub enum $name:ident { + $($(#[$var_attr:meta])* $variant:ident = $e:expr,)* + }) => { + $(#[$attr])* + pub enum $name { + $($(#[$var_attr])* $variant = $e),* + } + + impl $name { + pub fn from_u32(u: u32) -> Option<$name> { + $(if u == $name::$variant as u32 { + return Some($name::$variant) + })* + None + } + } + }; + ($(#[$attr:meta])* pub enum $name:ident { + $($(#[$var_attr:meta])* $variant:ident,)* + }) => { + $(#[$attr])* + pub enum $name { + $($(#[$var_attr])* $variant,)* + } + + impl $name { + pub fn from_u32(u: u32) -> Option<$name> { + $(if u == $name::$variant as u32 { + return Some($name::$variant) + })* + None + } + } + } +} |