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use predicates::{
reflection::{Case, PredicateReflection},
Predicate,
};
use tracing_core::{Level, LevelFilter};
use std::fmt;
use crate::Captured;
pub trait IntoLevelPredicate {
type Predicate: Predicate<Level>;
fn into_predicate(self) -> Self::Predicate;
}
impl<P: Predicate<Level>> IntoLevelPredicate for [P; 1] {
type Predicate = P;
fn into_predicate(self) -> Self::Predicate {
self.into_iter().next().unwrap()
}
}
impl IntoLevelPredicate for Level {
type Predicate = predicates::ord::EqPredicate<Level>;
fn into_predicate(self) -> Self::Predicate {
predicates::ord::eq(self)
}
}
impl IntoLevelPredicate for LevelFilter {
type Predicate = predicates::ord::OrdPredicate<Level>;
fn into_predicate(self) -> Self::Predicate {
self.into_level()
.map_or_else(|| predicates::ord::lt(Level::ERROR), predicates::ord::le)
}
}
pub fn level<P: IntoLevelPredicate>(matches: P) -> LevelPredicate<P::Predicate> {
LevelPredicate {
matches: matches.into_predicate(),
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct LevelPredicate<P> {
matches: P,
}
impl_bool_ops!(LevelPredicate<P>);
impl<P: Predicate<Level>> fmt::Display for LevelPredicate<P> {
fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(formatter, "level({})", self.matches)
}
}
impl<P: Predicate<Level>> PredicateReflection for LevelPredicate<P> {}
impl<'a, P: Predicate<Level>, T: Captured<'a>> Predicate<T> for LevelPredicate<P> {
fn eval(&self, variable: &T) -> bool {
self.matches.eval(variable.metadata().level())
}
fn find_case(&self, expected: bool, variable: &T) -> Option<Case<'_>> {
let child = self
.matches
.find_case(expected, variable.metadata().level())?;
Some(Case::new(Some(self), expected).add_child(child))
}
}