fn test_target_feature()

in target-spec/src/simple_eval.rs [134:217]

• 79 lines of code
• 1 McCabe index (conditional complexity)

    fn test_target_feature() {
        // target features are unknown by default.
        assert_eq!(
            eval("cfg(target_feature = \"sse\")", "x86_64-unknown-linux-gnu"),
            Ok(None),
        );
        assert_eq!(
            eval(
                "cfg(target_feature = \"atomics\")",
                "x86_64-unknown-linux-gnu",
            ),
            Ok(None),
        );
        assert_eq!(
            eval(
                "cfg(not(target_feature = \"fxsr\"))",
                "x86_64-unknown-linux-gnu",
            ),
            Ok(None),
        );

        fn eval_unknown(spec: &str, platform: &str) -> Option<bool> {
            let platform = Platform::new(
                platform.to_owned(),
                TargetFeatures::features(["sse", "sse2"].iter().copied()),
            )
            .expect("platform should be found");
            let spec: TargetSpec = spec.parse().unwrap();
            spec.eval(&platform)
        }

        assert_eq!(
            eval_unknown("cfg(target_feature = \"sse\")", "x86_64-unknown-linux-gnu"),
            Some(true),
        );
        assert_eq!(
            eval_unknown(
                "cfg(not(target_feature = \"sse\"))",
                "x86_64-unknown-linux-gnu",
            ),
            Some(false),
        );
        assert_eq!(
            eval_unknown("cfg(target_feature = \"fxsr\")", "x86_64-unknown-linux-gnu"),
            Some(false),
        );
        assert_eq!(
            eval_unknown(
                "cfg(not(target_feature = \"fxsr\"))",
                "x86_64-unknown-linux-gnu",
            ),
            Some(true),
        );

        fn eval_all(spec: &str, platform: &str) -> Option<bool> {
            let platform = Platform::new(platform.to_owned(), TargetFeatures::All)
                .expect("platform should be found");
            let spec: TargetSpec = spec.parse().unwrap();
            spec.eval(&platform)
        }

        assert_eq!(
            eval_all("cfg(target_feature = \"sse\")", "x86_64-unknown-linux-gnu"),
            Some(true),
        );
        assert_eq!(
            eval_all(
                "cfg(not(target_feature = \"sse\"))",
                "x86_64-unknown-linux-gnu",
            ),
            Some(false),
        );
        assert_eq!(
            eval_all("cfg(target_feature = \"fxsr\")", "x86_64-unknown-linux-gnu"),
            Some(true),
        );
        assert_eq!(
            eval_all(
                "cfg(not(target_feature = \"fxsr\"))",
                "x86_64-unknown-linux-gnu",
            ),
            Some(false),
        );
    }