重要更新:
在这个问题的答案中描述了一个更加改进的脚本,它只需要一个工作的python环境.
原始答案
以下bash-code将生成51到100个条目的MPL容器.如果您不关心其他MPL容器类型并且只想生成MPL列表,请相应地调整其值CONTAINERS.
#! /bin/bash
# The name of this script.
SCRIPT_NAME=$(basename $0)
# The usage message for this script.
USAGE="Usage: ${SCRIPT_NAME} <path-to-boost-source> [<new-value-for BOOST_MPL_LIMIT_VECTOR_SIZE>]"
# Script-arguments:
# The (absolute) path to the directory containing the Boost-source.
SOURCE=$(readlink -e "$1")
# The new limit for Boost.MPL's vector.
NEW_BOOST_MPL_LIMIT_VECTOR_SIZE=$2
# Check validity of arguments.
if [[ -z "${SOURCE}" ]] || ! [[ -d "${SOURCE}" ]]; then
echo "Missing path to Boost directory."
echo ${USAGE}
exit
fi
REGEX_INTEGER='^[0-9]+$'
if [[ -n "${NEW_BOOST_MPL_LIMIT_VECTOR_SIZE}" ]] && ! [[ ${NEW_BOOST_MPL_LIMIT_VECTOR_SIZE} =~ ${REGEX_INTEGER} ]]; then
echo "New size for BOOST_MPL_LIMIT_VECTOR_SIZE must be an unsigned integer!"
echo ${USAGE}
exit
fi
# The Boost.MPL-containers for which more preprocessed
# header-files shall be generated.
CONTAINERS="vector list set map"
# The same containers without Boost.MPL-map.
CONTAINERS_WITHOUT_MAP=$(echo ${CONTAINERS} | sed 's/map//g')
# Change into include-directory of Boost.MPL.
pushd ${SOURCE}/boost/mpl >/dev/null 2>&1
# Possibly change the limit for Boost.MPL's vector.
if [[ -n "${NEW_BOOST_MPL_LIMIT_VECTOR_SIZE}" ]]; then
sed -i "s/\(define\s\+BOOST_MPL_LIMIT_VECTOR_SIZE\s\+\)[0-9]\+/\1${NEW_BOOST_MPL_LIMIT_VECTOR_SIZE}/" ./limits/vector.hpp
fi
# Create hpp-files for each MPL-container with 60 to 100 elements
# which will be used during generation.
for container in ${CONTAINERS}; do
for i in {6..10}; do
sed -e "s/50/${i}0/g" \
-e "s/41/$((i-1))1/g" \
-e "s/40/$((i-1))0/g" \
./${container}/${container}50.hpp \
> ./${container}/${container}${i}0.hpp;
done
done
for container in ${CONTAINERS_WITHOUT_MAP}; do
for i in {6..10}; do
sed -e "s/50/${i}0/g" \
-e "s/41/$((i-1))1/g" \
-e "s/40/$((i-1))0/g" \
./${container}/${container}50_c.hpp \
> ./${container}/${container}${i}0_c.hpp;
done
done
# Leave include-directory of Boost.MPL.
popd >/dev/null 2>&1
# Change into source-directory of Boost.MPL.
pushd ${SOURCE}/libs/mpl/preprocessed >/dev/null 2>&1
# Create cpp-files for each MPL-container with 60 to 100 elements
# which will be used during generation.
for container in ${CONTAINERS}; do
for i in {6..10}; do
sed -e "s/50/${i}0/g" \
-e "s/41/$((i-1))1/g" \
-e "s/40/$((i-1))0/g" \
./${container}/${container}50.cpp \
> ./${container}/${container}${i}0.cpp;
done
done
for container in ${CONTAINERS_WITHOUT_MAP}; do
for i in {6..10}; do
sed -e "s/50/${i}0/g" \
-e "s/41/$((i-1))1/g" \
-e "s/40/$((i-1))0/g" \
./${container}/${container}50_c.cpp \
> ./${container}/${container}${i}0_c.cpp;
done
done
# Now generate MPL-preprocessed files using the python-scripts.
python preprocess_vector.py all ${SOURCE}
python preprocess_list.py all ${SOURCE}
python preprocess_set.py all ${SOURCE}
python preprocess_map.py all ${SOURCE}
python preprocess.py all ${SOURCE}
# Leave source-directory of Boost.MPL.
popd >/dev/null 2>&1
对于包含100个以上条目的更大容器,请调整for循环中的范围.
我希望有所帮助.
德尼兹
更新:
我意识到我的原始版本的脚本只生成了MPL容器头的编号版本.但是,它没有更新非编号版本.
我通过python preprocess.py all ${SOURCE}在脚本末尾添加来修复它.然而,如果在生成期间相应的宏设置(例如,更高的值BOOST_MPL_LIMIT_VECTOR_SIZE)与原始值不同,则这仅生成非编号的MPL容器头的修改版本.
可以user.hpp在每个子目录中的文件中进行这些修改${SOURCE}/libs/mpl/preprocessed/include.
例如,通过添加
#define BOOST_MPL_LIMIT_VECTOR_SIZE 30
到${SOURCE}/libs/mpl/preprocessed/include/gcc/user.hpp的boost::mpl::vector(从包括boost/mpl/vector.hpp)是能够保持,而不是默认20 30个元素,现在,.
注意:
但是,调整BOOST_MPL_LIMIT_VECTOR_SIZE仅用于生成的值并${SOURCE}/boost/mpl/limits/vector.hpp保持其未定义的值定义可能不是一个好主意.
可能地,这甚至不编译,因为底层boost::mpl::vector21到boost::mpl::vectorN无法找到(因为没有被自动包括在内).最佳解决方案可能是调整价值${SOURCE}/boost/mpl/limits/vector.hpp.如果给出第二个(可选)参数,上面的bash脚本可以自动执行此操作.
从Boost 1.59.0开始，下面解释的脚本现在包含在每个 Boost 版本中。
它们位于 int <boost-source-dir>/libs/mpl/preprocessed/。
该目录中的 README.txt应该解释如何使用它。（或者只是继续阅读。）
因为我意识到并不是每个人都手头有一个可用的bash shell（是的，我的意思是你们 Windows 人员;-)），但每个人都需要一个可用的python环境，所以我将上面提到的帮助器 bash 脚本转换为 python：
boost_mpl_preprocess.py
# Copyright Deniz Bahadir 2015
#
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)
#
# See http://www.boost.org/libs/mpl for documentation.
# See /sf/answers/1446218511/ for further information.
# See /sf/answers/2073901091/ for further information.
import argparse
import sys
import os
import os.path
import re
import fileinput
import shutil
def create_more_container_files(sourceDir, suffix, maxElements, containers, containers2):
"""Creates additional files for the individual MPL-containers."""
# Create files for each MPL-container with 20 to 'maxElements' elements
# which will be used during generation.
for container in containers:
for i in range(20, maxElements, 10):
# Create copy of "template"-file.
newFile = os.path.join( sourceDir, container, container + str(i+10) + suffix )
shutil.copyfile( os.path.join( sourceDir, container, container + "20" + suffix ), newFile )
# Adjust copy of "template"-file accordingly.
for line in fileinput.input( newFile, inplace=1, mode="rU" ):
line = re.sub(r'20', re.escape(str(i+10)), line.rstrip())
line = re.sub(r'11', re.escape(str(i + 1)), line.rstrip())
line = re.sub(r'10(?![0-9])', re.escape(str(i)), line.rstrip())
print(line)
for container in containers2:
for i in range(20, maxElements, 10):
# Create copy of "template"-file.
newFile = os.path.join( sourceDir, container, container + str(i+10) + "_c" + suffix )
shutil.copyfile( os.path.join( sourceDir, container, container + "20_c" + suffix ), newFile )
# Adjust copy of "template"-file accordingly.
for line in fileinput.input( newFile, inplace=1, mode="rU" ):
line = re.sub(r'20', re.escape(str(i+10)), line.rstrip())
line = re.sub(r'11', re.escape(str(i + 1)), line.rstrip())
line = re.sub(r'10(?![0-9])', re.escape(str(i)), line.rstrip())
print(line)
def create_input_for_numbered_sequences(headerDir, sourceDir, containers, maxElements):
"""Creates additional source- and header-files for the numbered sequence MPL-containers."""
# Create additional container-list without "map".
containersWithoutMap = containers[:]
try:
containersWithoutMap.remove('map')
except ValueError:
# We can safely ignore if "map" is not contained in 'containers'!
pass
# Create header/source-files.
create_more_container_files(headerDir, ".hpp", maxElements, containers, containersWithoutMap)
create_more_container_files(sourceDir, ".cpp", maxElements, containers, containersWithoutMap)
def adjust_container_limits_for_variadic_sequences(headerDir, containers, maxElements):
"""Adjusts the limits of variadic sequence MPL-containers."""
for container in containers:
headerFile = os.path.join( headerDir, "limits", container + ".hpp" )
regexMatch = r'(define\s+BOOST_MPL_LIMIT_' + container.upper() + r'_SIZE\s+)[0-9]+'
regexReplace = r'\g<1>' + re.escape( str(maxElements) )
for line in fileinput.input( headerFile, inplace=1, mode="rU" ):
line = re.sub(regexMatch, regexReplace, line.rstrip())
print(line)
def to_positive_multiple_of_10(string):
"""Converts a string into its encoded positive integer (greater zero) or throws an exception."""
try:
value = int(string)
except ValueError:
msg = '"%r" is not a positive multiple of 10 (greater zero).' % string
raise argparse.ArgumentTypeError(msg)
if value <= 0 or value % 10 != 0:
msg = '"%r" is not a positive multiple of 10 (greater zero).' % string
raise argparse.ArgumentTypeError(msg)
return value
def to_existing_absolute_path(string):
"""Converts a path into its absolute path and verifies that it exists or throws an exception."""
value = os.path.abspath(string)
if not os.path.exists( value ) or not os.path.isdir( value ):
msg = '"%r" is not a valid path to a directory.' % string
raise argparse.ArgumentTypeError(msg)
return value
def main():
"""The main function."""
# Prepare and run cmdline-parser.
cmdlineParser = argparse.ArgumentParser(description="A generator-script for pre-processed Boost.MPL headers.")
cmdlineParser.add_argument("-v", "--verbose", dest='verbose', action='store_true',
help="Be a little bit more verbose.")
cmdlineParser.add_argument("-s", "--sequence-type", dest='seqType', choices=['variadic', 'numbered', 'both'],
default='both',
help="Only update pre-processed headers for the selected sequence types, "
"either 'numbered' sequences, 'variadic' sequences or 'both' sequence "
"types. (Default=both)")
cmdlineParser.add_argument("--no-vector", dest='want_vector', action='store_false',
help="Do not update pre-processed headers for Boost.MPL Vector.")
cmdlineParser.add_argument("--no-list", dest='want_list', action='store_false',
help="Do not update pre-processed headers for Boost.MPL List.")
cmdlineParser.add_argument("--no-set", dest='want_set', action='store_false',
help="Do not update pre-processed headers for Boost.MPL Set.")
cmdlineParser.add_argument("--no-map", dest='want_map', action='store_false',
help="Do not update pre-processed headers for Boost.MPL Map.")
cmdlineParser.add_argument("--num-elements", dest='numElements', metavar="<num-elements>",
type=to_positive_multiple_of_10, default=100,
help="The maximal number of elements per container sequence. (Default=100)")
cmdlineParser.add_argument(dest='sourceDir', metavar="<source-dir>",
type=to_existing_absolute_path,
help="The source-directory of Boost.")
args = cmdlineParser.parse_args()
# Some verbose debug output.
if args.verbose:
print "Arguments extracted from command-line:"
print " verbose = ", args.verbose
print " source directory = ", args.sourceDir
print " num elements = ", args.numElements
print " sequence type = ", args.seqType
print " want: vector = ", args.want_vector
print " want: list = ", args.want_list
print " want: set = ", args.want_set
print " want: map = ", args.want_map
# The directories for header- and source files of Boost.MPL.
# NOTE: Assuming 'args.sourceDir' is the source-directory of the entire boost project.
headerDir = os.path.join( args.sourceDir, "boost", "mpl" )
sourceDir = os.path.join( args.sourceDir, "libs", "mpl", "preprocessed" )
# Check that the header/source-directories exist.
if not os.path.exists( headerDir ) or not os.path.exists( sourceDir ):
# Maybe 'args.sourceDir' is not the source-directory of the entire boost project
# but instead of the Boost.MPL git-directory, only?
headerDir = os.path.join( args.sourceDir, "include", "boost", "mpl" )
sourceDir = os.path.join( args.sourceDir, "preprocessed" )
if not os.path.exists( headerDir ) or not os.path.exists( sourceDir ):
cmdlineParser.print_usage()
print "error: Cannot find Boost.MPL header/source files in given Boost source-directory!"
sys.exit(0)
# Some verbose debug output.
if args.verbose:
print "Chosen header-directory: ", headerDir
print "Chosen source-directory: ", sourceDir
# Create list of containers for which files shall be pre-processed.
containers = []
if args.want_vector:
containers.append('vector')
if args.want_list:
containers.append('list')
if args.want_set:
containers.append('set')
if args.want_map:
containers.append('map')
if containers == []:
print "Nothing to do. (Why did you prevent generating pre-processed headers for all Boost.MPL container types?"
sys.exit(0)
# Some verbose debug output.
if args.verbose:
print "Containers for which to pre-process headers: ", containers
# Create (additional) input files for generating pre-processed headers of numbered sequence MPL containers.
if args.seqType == "both" or args.seqType == "numbered":
create_input_for_numbered_sequences(headerDir, sourceDir, containers, args.numElements)
# Modify settings for generating pre-processed headers of variadic sequence MPL containers.
if args.seqType == "both" or args.seqType == "variadic":
adjust_container_limits_for_variadic_sequences(headerDir, containers, args.numElements)
# Generate MPL-preprocessed files.
os.chdir( sourceDir )
if args.seqType == "both" or args.seqType == "numbered":
if args.want_vector:
if args.verbose:
print "Pre-process headers for Boost.MPL numbered vectors."
os.system( "python " + os.path.join( sourceDir, "preprocess_vector.py" ) + " all " + args.sourceDir )
if args.want_list:
if args.verbose:
print "Pre-process headers for Boost.MPL numbered lists."
os.system( "python " + os.path.join( sourceDir, "preprocess_list.py" ) + " all " + args.sourceDir )
if args.want_set:
if args.verbose:
print "Pre-process headers for Boost.MPL numbered sets."
os.system( "python " + os.path.join( sourceDir, "preprocess_set.py" ) + " all " + args.sourceDir )
if args.want_map:
if args.verbose:
print "Pre-process headers for Boost.MPL numbered maps."
os.system( "python " + os.path.join( sourceDir, "preprocess_map.py" ) + " all " + args.sourceDir )
if args.seqType == "both" or args.seqType == "variadic":
if args.verbose:
print "Pre-process headers for Boost.MPL variadic containers."
os.system( "python " + os.path.join( sourceDir, "preprocess.py" ) + " all " + args.sourceDir )
if __name__ == '__main__':
main()
运行它
python boost_mpl_preprocess.py --help
给出一些使用信息。
但您也可以使用单个命令行参数来运行它，该参数确定 Boost 源目录的路径（例如python boost_mpl_preprocess.py ./boost-source）并使用默认行为。
vector这会导致为所有四种 Boost.MPL 容器类型（ 、list和set）map及其编号和可变参数形式创建预处理标头。
笔记：
作为以可变参数形式预处理 Boost.MPL 容器时的副作用，其关联的限制宏的值BOOST_MPL_LIMIT_container_SIZE也会被修改。它获取调用boost_mpl_preprocess.py时确定的元素数量。
例如，以下调用仅预处理Boost.MPL 的可变参数vector形式，并将宏设置BOOST_MPL_LIMIT_VECTOR_SIZE为。./boost-source/boost/mpl/limits/vector.hpp70
$ python boost_mpl_preprocess.py --no-list --no-set --no-map \
--sequence-type=variadic --num-elements=70 ./boost-source
由于 Boost 1.56 预处理 Boost.MPL 容器即使使用上述脚本也不再起作用，因为 header-comments 的更改，依赖于原始的 python-scripts。
以下脚本可用于解决此问题。它只是将缺少的信息添加到标题注释中。
fix_boost_mpl_preprocess.py
# Copyright Deniz Bahadir 2015
#
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)
#
# See http://www.boost.org/libs/mpl for documentation.
# See /sf/answers/2073901091/ for further information.
import argparse
import sys
import os.path
import re
import fileinput
import datetime
import glob
def fix_header_comment(filename, timestamp):
"""Fixes the header-comment of the given file."""
# Fix input file.
name = os.path.basename( filename )
for line in fileinput.input( filename, inplace=1, mode="rU" ):
# If header-comment already contains anything for '$Id$', remove it.
line = re.sub(r'\$Id:[^$]+\$', r'$Id$', line.rstrip())
# Replace '$Id$' by a string containing the file's name (and a timestamp)!
line = re.sub(re.escape(r'$Id$'), r'$Id: ' + name + r' ' + timestamp.isoformat() + r' $', line.rstrip())
print(line)
def fix_input_files_for_variadic_seq(sourceDir, timestamp):
"""Fixes files used as input when pre-processing MPL-containers in their variadic form."""
files = glob.glob( os.path.join( sourceDir, "src", "*" ) )
for currentFile in sorted( files ):
fix_header_comment( currentFile, timestamp )
def fix_input_files_for_numbered_seq(sourceDir, suffix, timestamp, containers):
"""Fixes files used as input when pre-processing MPL-containers in their numbered form."""
# Fix input files for each MPL-container type.
for container in containers:
files = glob.glob( os.path.join( sourceDir, container, container + '*' + suffix ) )
for currentFile in sorted( files ):
fix_header_comment( currentFile, timestamp )
def fix_input_files(headerDir, sourceDir, containers=['vector', 'list', 'set', 'map'], verbose='false'):
"""Fixes source- and header-files used as input when pre-processing MPL-containers."""
# The new modification time.
timestamp = datetime.datetime.now();
# Fix the input files.
if verbose:
print "Fix input files for pre-processing Boost.MPL variadic containers."
fix_input_files_for_variadic_seq(sourceDir, timestamp)
if verbose:
print "Fix input files for pre-processing Boost.MPL numbered containers."
fix_input_files_for_numbered_seq(headerDir, ".hpp", timestamp, containers)
fix_input_files_for_numbered_seq(sourceDir, ".cpp", timestamp, containers)
def to_existing_absolute_path(string):
"""Converts a path into its absolute path and verifies that it exists or throws an exception."""
value = os.path.abspath(string)
if not os.path.exists( value ) or not os.path.isdir( value ):
msg = '"%r" is not a valid path to a directory.' % string
raise argparse.ArgumentTypeError(msg)
return value
def main():
"""The main function."""
# Prepare and run cmdline-parser.
cmdlineParser = argparse.ArgumentParser(
description="Fixes the input files used for pre-processing of Boost.MPL headers.")
cmdlineParser.add_argument("-v", "--verbose", dest='verbose', action='store_true',
help="Be a little bit more verbose.")
cmdlineParser.add_argument(dest='sourceDir', metavar="<source-dir>",
type=to_existing_absolute_path,
help="The source-directory of Boost.")
args = cmdlineParser.parse_args()
# Some verbose debug output.
if args.verbose:
print "Arguments extracted from command-line:"
print " verbose = ", args.verbose
print " source directory = ", args.sourceDir
# The directories for header- and source files of Boost.MPL.
# NOTE: Assuming 'args.sourceDir' is the source-directory of the entire boost project.
headerDir = os.path.join( args.sourceDir, "boost", "mpl" )
sourceDir = os.path.join( args.sourceDir, "libs", "mpl", "preprocessed" )
# Check that the header/source-directories exist.
if not os.path.exists( headerDir ) or not os.path.exists( sourceDir ):
# Maybe 'args.sourceDir' is not the source-directory of the entire boost project
# but instead of the Boost.MPL git-directory, only?
headerDir = os.path.join( args.sourceDir, "include", "boost", "mpl" )
sourceDir = os.path.join( args.sourceDir, "preprocessed" )
if not os.path.exists( headerDir ) or not os.path.exists( sourceDir ):
cmdlineParser.print_usage()
print "error: Cannot find Boost.MPL header/source files in given Boost source-directory!"
sys.exit(0)
# Some verbose debug output.
if args.verbose:
print "Chosen header-directory: ", headerDir
print "Chosen source-directory: ", sourceDir
# Fix input file for generating pre-processed headers.
fix_input_files(headerDir, sourceDir, verbose = args.verbose)
if __name__ == '__main__':
main()
像这样运行它：
$ python fix-boost_mpl_preprocess.py ./boost-source