Struct ToolchainFingerprint 

pub struct ToolchainFingerprint {
    pub lean_version: &'static str,
    pub resolved_version: &'static str,
    pub header_sha256: &'static str,
    pub fixture_sha256: &'static str,
    pub host_triple: &'static str,
}

Typed identity of the Lean toolchain this crate was compiled against.

Eq + Hash so the fingerprint can serve as a HashMap key for caches keyed by toolchain identity (e.g. compiled module caches, proof caches). Clone + Debug are derived for convenience; every field is &'static str so cloning is a pointer copy.

Fields

lean_version: &'static str

LEAN_VERSION_STRING from the active lean.h.

resolved_version: &'static str

The version string from the matched SupportedToolchain entry. Equal to Self::lean_version except when several releases share one lean.h digest, in which case it is the first version listed for that entry.

header_sha256: &'static str

SHA-256 of the lean.h this build was resolved against.

fixture_sha256: &'static str

SHA-256 of the workspace Lake fixture artifacts, or zero when the crate is built from a published tarball without workspace fixtures.

host_triple: &'static str

Target triple this crate was built for.

Implementations

impl ToolchainFingerprint

pub const fn current() -> Self

Compose the fingerprint from the build-baked constants.

pub fn is_supported(&self) -> bool

Return true iff Self::lean_version is included in the SUPPORTED_TOOLCHAINS window.

The build script already filters at compile time, so this method returns true for any binary that compiled successfully. It is exposed for tooling that constructs a fingerprint from an external source (e.g. a remote-worker handshake).

Trait Implementations

impl Clone for ToolchainFingerprint

fn clone(&self) -> ToolchainFingerprint

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ToolchainFingerprint

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ToolchainFingerprint

fn default() -> Self

Returns the “default value” for a type.

impl Hash for ToolchainFingerprint

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ToolchainFingerprint

fn eq(&self, other: &ToolchainFingerprint) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for ToolchainFingerprint

impl StructuralPartialEq for ToolchainFingerprint