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rust-cpython: mark all PyLeaked methods as unsafe...
rust-cpython: mark all PyLeaked methods as unsafe Unfortunately, these methods can be abused to obtain the inner 'static reference. The simplest (pseudo-code) example is: let leaked: PyLeaked<&'static _> = shared.leak_immutable(); let static_ref: &'static _ = &*leaked.try_borrow(py)?; // PyLeakedRef::deref() tries to bound the lifetime to itself, but // the underlying data is a &'static reference, so the returned // reference can be &'static. This problem can be easily fixed by coercing the lifetime, but there are many other ways to achieve that, and there wouldn't be a generic solution: let leaked: PyLeaked<&'static [_]> = shared.leak_immutable(); let leaked_iter: PyLeaked<slice::Iter<'static, _>> = unsafe { leaked.map(|v| v.iter()) }; let static_slice: &'static [_] = leaked_iter.try_borrow(py)?.as_slice(); So basically I failed to design the safe borrowing interface. Maybe we'll instead have to add much more restricted interface on top of the unsafe PyLeaked methods? For instance, Iterator::next() could be implemented if its Item type is not &'a (where 'a may be cheated.) Anyway, this seems not an easy issue, so it's probably better to leave the current interface as unsafe, and get broader comments while upstreaming this feature.
Gilles Moris - - Load All Authors

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r13515:26163257 1.8 stable
r44689:e960c30d default
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tcsh_completion_build.sh
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/ contrib / tcsh_completion_build.sh
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TK Soh
Add contrib script for generating tcsh completion source
 r1155 #!/bin/sh
#
# tcsh_completion_build.sh - script to generate tcsh completion
#
#
# Copyright (C) 2005 TK Soh.
#
# This is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 2 of the License, or (at your
Thomas Arendsen Hein
Cleanup of tabs and trailing spaces.
 r1308 # option) any later version.
TK Soh
Add contrib script for generating tcsh completion source
 r1155 #
#
# Description
# -----------
# This script generates a tcsh source file to support completion
# of Mercurial commands and options.
#
# Instruction:
# -----------
# Run this script to generate the tcsh source file, and source
# the file to add command completion support for Mercurial.
#
# tcsh% tcsh_completion.sh FILE
# tcsh% source FILE
#
# If FILE is not specified, tcsh_completion will be generated.
#
# Bugs:
# ----
# 1. command specific options are not supported
# 2. hg commands must be specified immediately after 'hg'.
#
tcsh_file=${1-tcsh_completion}
hg_commands=`hg --debug help | \
sed -e '1,/^list of commands:/d' \
Gilles Moris
Update tcsh completion scripts with new commands and for new help output....
 r7766 -e '/^enabled extensions:/,$d' \
Gilles Moris
contrib: update tcsh_completion for Mercurial 1.8...
 r13515 -e '/^additional help topics:/,$d' \
TK Soh
tcsh_completion_build.sh: fixed error caused by xargs on Linux
 r1157 -e '/^ [^ ]/!d; s/[,:]//g;' | \
TK Soh
Add contrib script for generating tcsh completion source
 r1155 xargs -n5 | \
TK Soh
tcsh_completion_build.sh: fixed error caused by xargs on Linux
 r1157 sed -e '$!s/$/ \\\\/g; 2,$s/^ */ /g'`
TK Soh
Add contrib script for generating tcsh completion source
 r1155
hg_global_options=`hg -v help | \
sed -e '1,/global/d;/^ *-/!d; s/ [^- ].*//' | \
TK Soh
tcsh_completion_build.sh: fixed error caused by xargs on Linux
 r1157 sed -e 's/ *$//; $!s/$/ \\\\/g; 2,$s/^ */ /g'`
TK Soh
Add contrib script for generating tcsh completion source
 r1155
hg_version=`hg version | sed -e '1q'`
script_name=`basename $0`
cat > $tcsh_file <<END
#
# tcsh completion for Mercurial
#
# This file has been auto-generated by $script_name for
Thomas Arendsen Hein
Cleanup of tabs and trailing spaces.
 r1308 # $hg_version
TK Soh
Add contrib script for generating tcsh completion source
 r1155 #
# Copyright (C) 2005 TK Soh.
#
# This is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 2 of the License, or (at your
Thomas Arendsen Hein
Cleanup of tabs and trailing spaces.
 r1308 # option) any later version.
TK Soh
Add contrib script for generating tcsh completion source
 r1155 #
complete hg \\
'n/--cwd/d/' 'n/-R/d/' 'n/--repository/d/' \\
'C/-/($hg_global_options)/' \\
'p/1/($hg_commands)/'
END