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| author | Simon Sapin <simon.sapin@exyr.org> | 2018-11-15 13:21:25 +0100 |
|---|---|---|
| committer | Simon Sapin <simon.sapin@exyr.org> | 2018-11-20 18:22:40 +0100 |
| commit | 544ad37753184c387fd235dea8bd4c3fba22bd74 (patch) | |
| tree | 98cd0affbfea0014025511fe83efa77dc06e5411 | |
| parent | 48aae09e9fe0a5574f59867610a9005c68ff5c19 (diff) | |
| download | rust-544ad37753184c387fd235dea8bd4c3fba22bd74.tar.gz rust-544ad37753184c387fd235dea8bd4c3fba22bd74.zip | |
Unfold<St, F>: Debug without F: Debug
| -rw-r--r-- | src/libcore/iter/sources.rs | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/libcore/iter/sources.rs b/src/libcore/iter/sources.rs index a209b90ace1..d769c9c80a0 100644 --- a/src/libcore/iter/sources.rs +++ b/src/libcore/iter/sources.rs @@ -444,7 +444,7 @@ pub fn unfold<St, T, F>(initial_state: St, f: F) -> Unfold<St, F> /// See its documentation for more. /// /// [`unfold`]: fn.unfold.html -#[derive(Copy, Clone, Debug)] +#[derive(Copy, Clone)] #[unstable(feature = "iter_unfold", issue = /* FIXME */ "0")] pub struct Unfold<St, F> { state: St, @@ -462,3 +462,12 @@ impl<St, T, F> Iterator for Unfold<St, F> (self.f)(&mut self.state) } } + +#[unstable(feature = "iter_unfold", issue = /* FIXME */ "0")] +impl<St: fmt::Debug, F> fmt::Debug for Unfold<St, F> { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + f.debug_struct("Unfold") + .field("state", &self.state) + .finish() + } +} |