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//! Type definitions for learning about the dependency formats of all upstream
//! crates (rlibs/dylibs/oh my).
//!
//! For all the gory details, see the provider of the `dependency_formats`
//! query.
use crate::session::config;
/// A list of dependencies for a certain crate type.
///
/// The length of this vector is the same as the number of external crates used.
/// The value is None if the crate does not need to be linked (it was found
/// statically in another dylib), or Some(kind) if it needs to be linked as
/// `kind` (either static or dynamic).
pub type DependencyList = Vec<Linkage>;
/// A mapping of all required dependencies for a particular flavor of output.
///
/// This is local to the tcx, and is generally relevant to one session.
pub type Dependencies = Vec<(config::CrateType, DependencyList)>;
#[derive(Copy, Clone, PartialEq, Debug, HashStable)]
pub enum Linkage {
NotLinked,
IncludedFromDylib,
Static,
Dynamic,
}