Method constant_loader

src/resolution.rs:916–918

Return a constant-value-loader closure. The returned closure looks up a global constant name and returns `Some(Some(value))` when found with a known value, `Some(None)` when found without a value, and `None` when not found.

(&self)

    /// `Some(None)` when found without a value, and `None` when not
    /// found.
    pub(crate) fn constant_loader(&self) -> impl Fn(&str) -> Option<Option<String>> + '_ {
        move |name: &str| self.lookup_global_constant(name)
    }
}