diff options
| -rw-r--r-- | src/features.rs | 116 |
1 files changed, 73 insertions, 43 deletions
diff --git a/src/features.rs b/src/features.rs index 93ebbc34..257d7697 100644 --- a/src/features.rs +++ b/src/features.rs @@ -110,72 +110,74 @@ pub const LATEST_STABLE_RUST: RustTarget = RustTarget::Stable_1_21; /// Create RustFeatures struct definition, new(), and a getter for each field macro_rules! rust_feature_def { - ( $( $( #[$attr:meta] )* => $feature:ident; )* ) => { + ( + $( $rust_target:ident { + $( $( #[$attr:meta] )* => $feature:ident; )* + } )* + ) => { /// Features supported by a rust target #[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)] pub struct RustFeatures { - $( + $( $( $( #[$attr] )* pub $feature: bool, - )* + )* )* } impl RustFeatures { /// Gives a RustFeatures struct with all features disabled fn new() -> Self { RustFeatures { - $( + $( $( $feature: false, - )* + )* )* } } } - } -} -rust_feature_def!( - /// Untagged unions ([RFC 1444](https://github.com/rust-lang/rfcs/blob/master/text/1444-union.md)) - => untagged_union; - /// `thiscall` calling convention ([Tracking issue](https://github.com/rust-lang/rust/issues/42202)) - => thiscall_abi; - /// builtin impls for `Clone` ([PR](https://github.com/rust-lang/rust/pull/43690)) - => builtin_clone_impls; - /// repr(align) https://github.com/rust-lang/rust/pull/47006 - => repr_align; - /// associated constants https://github.com/rust-lang/rust/issues/29646 - => associated_const; -); + impl From<RustTarget> for RustFeatures { + fn from(rust_target: RustTarget) -> Self { + let mut features = RustFeatures::new(); -impl From<RustTarget> for RustFeatures { - fn from(rust_target: RustTarget) -> Self { - let mut features = RustFeatures::new(); - - if rust_target >= RustTarget::Stable_1_19 { - features.untagged_union = true; - } - - if rust_target >= RustTarget::Stable_1_20 { - features.associated_const = true; - } - - if rust_target >= RustTarget::Stable_1_21 { - features.builtin_clone_impls = true; - } - - if rust_target >= RustTarget::Stable_1_25 { - features.repr_align = true; - } + $( + if rust_target >= RustTarget::$rust_target { + $( + features.$feature = true; + )* + } + )* - if rust_target >= RustTarget::Nightly { - features.thiscall_abi = true; + features + } } - - features } } +rust_feature_def!( + Stable_1_19 { + /// Untagged unions ([RFC 1444](https://github.com/rust-lang/rfcs/blob/master/text/1444-union.md)) + => untagged_union; + } + Stable_1_20 { + /// associated constants ([PR](https://github.com/rust-lang/rust/pull/42809)) + => associated_const; + } + Stable_1_21 { + /// builtin impls for `Clone` ([PR](https://github.com/rust-lang/rust/pull/43690)) + => builtin_clone_impls; + } + Stable_1_25 { + /// repr(align) ([PR](https://github.com/rust-lang/rust/pull/47006)) + => repr_align; + } + Nightly { + /// `thiscall` calling convention ([Tracking issue](https://github.com/rust-lang/rust/issues/42202)) + => thiscall_abi; + } +); + impl Default for RustFeatures { fn default() -> Self { let default_rust_target: RustTarget = Default::default(); @@ -185,9 +187,37 @@ impl Default for RustFeatures { #[cfg(test)] mod test { -#![allow(unused_imports)] + #![allow(unused_imports)] use super::*; + #[test] + fn target_features() { + let f_1_0 = RustFeatures::from(RustTarget::Stable_1_0); + assert!( + !f_1_0.untagged_union + && !f_1_0.associated_const + && !f_1_0.builtin_clone_impls + && !f_1_0.repr_align + && !f_1_0.thiscall_abi + ); + let f_1_21 = RustFeatures::from(RustTarget::Stable_1_21); + assert!( + f_1_21.untagged_union + && f_1_21.associated_const + && f_1_21.builtin_clone_impls + && !f_1_21.repr_align + && !f_1_21.thiscall_abi + ); + let f_nightly = RustFeatures::from(RustTarget::Nightly); + assert!( + f_nightly.untagged_union + && f_nightly.associated_const + && f_nightly.builtin_clone_impls + && f_nightly.repr_align + && f_nightly.thiscall_abi + ); + } + fn test_target(target_str: &str, target: RustTarget) { let target_string: String = target.into(); assert_eq!(target_str, target_string); |