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Previously, the getter and setter functions generated for a bitfield
struct by #[bitfield] all operated on primitive types like bool, u8, u16
etc.
This CL adds support for getters and setters defined in terms of
user-defined enums.
We make an enum bitfield-compatible by adding #[bitfield]. The number of
variants must be a power of 2.
#[bitfield]
enum TwoBits {
Zero = 0b00,
One = 0b01,
Two = 0b10,
Three = 0b11,
}
And then it may be used to specify a field in a bitfield struct.
#[bitfield]
struct Struct {
prefix: BitField1,
two_bits: TwoBits,
suffix: BitField5,
}
The generated getters and setters for this struct would have the
following signatures:
impl Struct {
fn get_prefix(&self) -> u8;
fn set_prefix(&mut self, val: u8);
fn get_two_bits(&self) -> TwoBits;
fn set_two_bits(&mut self, val: TwoBits);
fn get_suffix(&self) -> u8;
fn set_suffix(&mut self, val: u8);
}
TEST=`cargo test` the bit_field and bit_field_derive crates
TEST=`cargo check` crosvm
Change-Id: Ibc8923e2877fda6ae8da5767731edcb68721a434
Reviewed-on: https://chromium-review.googlesource.com/1519686
Commit-Ready: David Tolnay <dtolnay@chromium.org>
Tested-by: David Tolnay <dtolnay@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: David Tolnay <dtolnay@chromium.org>
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BUG=None
TEST=None
Change-Id: I6db08c2ccfc616e4e34ad0219580c084dda34675
Reviewed-on: https://chromium-review.googlesource.com/1475058
Commit-Ready: Miriam Zimmerman <mutexlox@chromium.org>
Tested-by: Miriam Zimmerman <mutexlox@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
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Changes in this CL:
- Crate-level documentation for bit_field crate!
- Use absolute paths within generated code so that the caller is no
longer required to have various implementation details from the
bit_field crate in scope.
- Check that the total number of bits is a multiple of 8. Previously, it
would generate compilable code that panicked when invoking accessors.
- Provide B0 .. B64 as shorthand for BitField0 .. BitField64.
- Use `bool` as the bool specifier rather than BitFieldBool.
- Disallow BitFieldSpecifier impls outside the bit_field crate.
- Simplify declaration of the BitFieldN types by replacing the recursive
macro_rules with a simpler procedural macro.
TEST=`cargo test` in bit_field and in bit_field_derive
Change-Id: Ica9347bc89901de85f74366edd038fb5d8042ee6
Reviewed-on: https://chromium-review.googlesource.com/1382578
Commit-Ready: David Tolnay <dtolnay@chromium.org>
Tested-by: David Tolnay <dtolnay@chromium.org>
Reviewed-by: Jingkui Wang <jkwang@google.com>
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BitFieldSpecifiers are now generated by macros.
Can use BitFieldBool to specify a bool field.
BUG=chromium:831850
TEST=local cargo build/test
Change-Id: Id6b4a773ab612cea39ba811c3ec1da212b618ba2
Reviewed-on: https://chromium-review.googlesource.com/1356912
Commit-Ready: David Tolnay <dtolnay@chromium.org>
Tested-by: David Tolnay <dtolnay@chromium.org>
Reviewed-by: David Tolnay <dtolnay@chromium.org>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
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BUG=None
TEST=cargo fmt --all -- --check
Change-Id: Ieccf6d77af27d299a08d22d9b3ee4b44bd90c5b8
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1370625
Reviewed-by: David Tolnay <dtolnay@chromium.org>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
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Before:
#[derive(BitField)]
#[passthrough(derive(Clone, Copy, PartialEq))]
pub struct TrbSchema {
parameter: B64,
status: B32,
cycle: B1,
flags: B9,
trb_type: B6,
control: B16,
}
After:
#[bitfield]
#[derive(Clone, Copy, PartialEq)]
pub struct Trb {
parameter: B64,
status: B32,
cycle: B1,
flags: B9,
trb_type: B6,
control: B16,
}
This change eliminates the need for the `passthrough` attribute, and
avoids the separate `FooSchema` struct continuing to float around and
disrupt IDE autocomplete.
TEST=`cargo test` the bit_field_derive crate
TEST=`cargo check` the devices crate against a migrated CL:1144264
Change-Id: I950ce896607468c73852aa181827f1a5dc0f0227
Reviewed-on: https://chromium-review.googlesource.com/1366539
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: David Tolnay <dtolnay@chromium.org>
Reviewed-by: Jingkui Wang <jkwang@google.com>
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Rustfmt currently does not touch the content of macro invocations. Also
it used to have a bug where if it changed indentation of a block of code
containing a multi-line macro invocation then the macro input would not
get correspondingly indented. That bug was visible across some of the
code here.
For example:
// rustfmt decides to un-indent the surrounding block:
let data_size_in_bytes = quote!(
( #( #field_types::FIELD_WIDTH as usize )+* ) / 8
);
// poorly formatted resulting code:
let data_size_in_bytes = quote!(
( #( #field_types::FIELD_WIDTH as usize )+* ) / 8
);
// should have been:
let data_size_in_bytes = quote!(
( #( #field_types::FIELD_WIDTH as usize )+* ) / 8
);
TEST=cargo check crosvm
TEST=cargo test each of the three proc-macro crates
CQ-DEPEND=CL:1338507
Change-Id: Id2d456a8d85d719fbc0a65624f153f0f9df6f500
Reviewed-on: https://chromium-review.googlesource.com/1338508
Commit-Ready: David Tolnay <dtolnay@chromium.org>
Tested-by: David Tolnay <dtolnay@chromium.org>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
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This brings us onto the stable API surface area for procedural macros
that stabilized in Rust 1.30, rather than the string-based shim on
older compilers.
https://blog.rust-lang.org/2018/10/25/Rust-1.30.0.html
Intervening release notes:
- https://github.com/dtolnay/syn/releases/tag/0.13.0
- https://github.com/dtolnay/syn/releases/tag/0.14.0
- https://github.com/dtolnay/syn/releases/tag/0.15.0
TEST=cargo check crosvm
TEST=cargo test each of the three proc-macro crates
TEST=build_packages
CQ-DEPEND=CL:1340766
Change-Id: Idcf14df0225ab41423b9a8639d0bba0a63513712
Reviewed-on: https://chromium-review.googlesource.com/1338507
Commit-Ready: David Tolnay <dtolnay@chromium.org>
Tested-by: David Tolnay <dtolnay@chromium.org>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
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implements fmt::Debug for bitfield
BUG=chromium:831850
TEST=cargo test
Change-Id: I58c2211a50726aaea0ea45164ae07c7b38eddea7
Reviewed-on: https://chromium-review.googlesource.com/1147111
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Jingkui Wang <jkwang@google.com>
Reviewed-by: Zach Reizner <zachr@chromium.org>
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Support macro derive(BitField) to make life easier.
BUG=None.
TEST=local build and run test.
Change-Id: I582620de250017fb7c0b601f9ad4fbcbbc2fe02a
Reviewed-on: https://chromium-review.googlesource.com/1069331
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Jingkui Wang <jkwang@google.com>
Reviewed-by: Zach Reizner <zachr@chromium.org>
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