upstream/mercurial-mirror Files · rust/hg-cpython/src/conversion.rs

manifest: introduce new exception to signal unavailability of fastdelta()...

manifest: introduce new exception to signal unavailability of fastdelta() I've spent some time reflecting on this, and I think this is the best we can do in this API contract for now. This opens the door to adding treemanifest's implementation to the list of implementers of imanifestdict. Differential Revision: https://phab.mercurial-scm.org/D8365

Georges Racinet - - Load All Authors

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             conversion.rs
        
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                | application/rls-services+xml
            
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             / rust / hg-cpython / src / conversion.rs
          
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      // conversion.rs

      //

      // Copyright 2019 Georges Racinet <georges.racinet@octobus.net>

      //

      // This software may be used and distributed according to the terms of the

      // GNU General Public License version 2 or any later version.

      //! Bindings for the hg::ancestors module provided by the

      //! `hg-core` crate. From Python, this will be seen as `rustext.ancestor`

      use cpython::{ObjectProtocol, PyObject, PyResult, Python};

      use hg::Revision;

      use std::iter::FromIterator;

      /// Utility function to convert a Python iterable into various collections

      ///

      /// We need this in particular to feed to various methods of inner objects

      /// with `impl IntoIterator<Item=Revision>` arguments, because

      /// a `PyErr` can arise at each step of iteration, whereas these methods

      /// expect iterables over `Revision`, not over some `Result<Revision, PyErr>`

      pub fn rev_pyiter_collect<C>(py: Python, revs: &PyObject) -> PyResult<C>

      where

          C: FromIterator<Revision>,

      {

          revs.iter(py)?

              .map(|r| r.and_then(|o| o.extract::<Revision>(py)))

              .collect()

      }

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				// conversion.rs
				//
				// Copyright 2019 Georges Racinet <georges.racinet@octobus.net>
				//
				// This software may be used and distributed according to the terms of the
				// GNU General Public License version 2 or any later version.

				//! Bindings for the hg::ancestors module provided by the
				//! `hg-core` crate. From Python, this will be seen as `rustext.ancestor`

				use cpython::{ObjectProtocol, PyObject, PyResult, Python};
				use hg::Revision;
				use std::iter::FromIterator;

				/// Utility function to convert a Python iterable into various collections
				///
				/// We need this in particular to feed to various methods of inner objects
				/// with `impl IntoIterator<Item=Revision>` arguments, because
				/// a `PyErr` can arise at each step of iteration, whereas these methods
				/// expect iterables over `Revision`, not over some `Result<Revision, PyErr>`
				pub fn rev_pyiter_collect<C>(py: Python, revs: &PyObject) -> PyResult<C>
				where
				C: FromIterator<Revision>,
				{
				revs.iter(py)?
				.map(\|r\| r.and_then(\|o\| o.extract::<Revision>(py)))
				.collect()
				}