Trait CfgEvaluator

pub trait CfgEvaluator {
    // Required method
    fn eval(&self, name: &str, value: Option<&str>) -> CfgResult;
}

Logic to decide whether a conditional compilation attribute is enabled or disabled.

Required Methods

fn eval(&self, name: &str, value: Option<&str>) -> CfgResult

A name-only attribute such as cfg(ident) is passed with a value of None, while cfg(key = "value") is passed with the “value” in value.

Implementors