Mercurial > hg
view rust/hg-cpython/src/exceptions.rs @ 42328:94f3a73b6672
rust-filepatterns: add `rust-cpython` bindings for `filepatterns`
This change adds the `rust-cpython` interface for top-level functions and
exceptions in the filepatterns module.
Contrary to the Python implementation, this tries to have finer-grained
exceptions to allow for better readability and flow control down the line.
Differential Revision: https://phab.mercurial-scm.org/D6272
author | Raphaël Gomès <rgomes@octobus.net> |
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date | Fri, 17 May 2019 09:36:29 -0400 |
parents | ee943a920606 |
children | d26e4a434fe5 |
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// ancestors.rs // // Copyright 2018 Georges Racinet <gracinet@anybox.fr> // // 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 Rust errors //! //! [`GraphError`] exposes `hg::GraphError` as a subclass of `ValueError` //! but some variants of `hg::GraphError` can be converted directly to other //! existing Python exceptions if appropriate. //! //! [`GraphError`]: struct.GraphError.html use cpython::exc::{ValueError, RuntimeError}; use cpython::{PyErr, Python, exc}; use hg; py_exception!(rustext, GraphError, ValueError); impl GraphError { pub fn pynew(py: Python, inner: hg::GraphError) -> PyErr { match inner { hg::GraphError::ParentOutOfRange(r) => { GraphError::new(py, ("ParentOutOfRange", r)) } hg::GraphError::WorkingDirectoryUnsupported => { match py .import("mercurial.error") .and_then(|m| m.get(py, "WdirUnsupported")) { Err(e) => e, Ok(cls) => PyErr::from_instance(py, cls), } } } } } py_exception!(rustext, PatternError, RuntimeError); py_exception!(rustext, PatternFileError, RuntimeError); impl PatternError { pub fn pynew(py: Python, inner: hg::PatternError) -> PyErr { match inner { hg::PatternError::UnsupportedSyntax(m) => { PatternError::new(py, ("PatternError", m)) } } } } impl PatternFileError { pub fn pynew(py: Python, inner: hg::PatternFileError) -> PyErr { match inner { hg::PatternFileError::IO(e) => { let value = ( e.raw_os_error().unwrap_or(2), e.to_string() ); PyErr::new::<exc::IOError, _>(py, value) } hg::PatternFileError::Pattern(e, l) => { match e { hg::PatternError::UnsupportedSyntax(m) => PatternFileError::new(py, ("PatternFileError", m, l)) } } } } }