Web@VictorPolevoy you are mostly right — if false and if true should be removed at compile time, at least when optimizing. The body of if false should be removed, but the body if if true should be kept. Then whichever blocks are true will be evaluated at run time. This is another reason to use else — to prevent both feature's code blocks from being evaluated! WebSet Configuration Options. target_arch. Key-value option set once with the target's CPU architecture. The value is similar to the first element of the platform's target triple, ...
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WebApr 15, 2015 · This would serve the purpose of allowing crates to automatically detect if they are being built with a nightly compiler and consequently enable or disable #! [feature] directives as appropriate. I would specifically like to proposed that the # [cfg] directive nightly is set by default by only the nightly compiler (not the beta or stable channels). WebAs of at least Rust 1.21.1, it's possible to do this as exactly as you said: fn main () { # [cfg (foo)] { println! ("using foo config"); } } Before this, it isn't possible to do this completely conditionally (i.e. avoiding the block being type checked entirely), doing that is covered by RFC #16. However, you can use the cfg macro which ... climbing vines full sun
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WebMar 26, 2024 · The Wasm builder doesn't use the default feature std. If you don't specify default-features = false in the dependencies, then the dependencies use their std feature, and then the Wasm can't be build. The "normal" build process (where you build the native binary) is done using the std feature, and you don't want to keep typing cargo build ... WebOct 28, 2024 · IntelliJ Rust: New Functionality for Cargo Features. Like C/C++ and other native languages, Rust includes support for conditional compilation. The most common way to instruct the compiler whether to include or ignore a piece of code in compilation is to add a cfg attribute with the required condition. For example, you can use this mechanism to ... WebFeb 7, 2024 · Control Flow Guard (CFG) is a highly-optimized platform security feature that was created to combat memory corruption vulnerabilities. By placing tight … climbing vines for zone 6