获取具有指定前缀的变量列表 [英] Get a list of variables with a specified prefix
问题描述
有没有办法获取具有指定前缀的用户定义变量的列表?例如:
set(vars_MyVar1 something)
set(vars_MyVar2 something)
getListOfVarsStartingWith(vars_)
?
函数 getListOfVarsStartingWith
可以用以下方式编写:
function(getListOfVarsStartingWith _prefix _varResult)
get_cmake_property(_vars VARIABLES)
string(REGEX MATCHALL(^ |;)$ {_ prefix} [A-Za-z0-9 _] *_matchedVars$ { _vars})
set($ {_ varResult} $ {_ matchedVars} PARENT_SCOPE)
endfunction()
b $ b
函数使用CMake函数 string(REGEX MATCHALL
)来计算所有匹配的变量名,而不使用循环。这里是一个用法示例:
set(vars_MyVar1 something)
set(vars_MyVar2 something)
getListOfVarsStartingWith(vars_matchedVars)
foreach _var IN LISTS matchedVars)
消息($ {_ var} = $ {$ {_ var}})
endforeach()
如果搜索只返回缓存变量,请使用以下函数:
函数(getListOfVarsStartingWith _prefix _varResult)
get_cmake_property(_vars CACHE_VARIABLES)
string(REGEX MATCHALL(^ |;)$ {_ prefix} [A-Za-z0-9 _] *_matchedVars$ {_ vars}
set(_resultVars)
foreach(_variable $ {_ matchedVars})
get_property(_type CACHE$ {_ variable}PROPERTY TYPE)
if {_type}STREQUALSTATIC)
list(APPEND _resultVars$ {_ variable})
endif()
endforeach()
set($ {_ varResult} _resultVars} PARENT_SCOPE)
endfunction()
此函数查询 CACHE_VARIABLES
属性,并确保类型 STATIC
的缓存变量,由CMake内部使用,不会返回。
Is there a way to get a list of user-defined variables that have a specified prefix? For example:
set(vars_MyVar1 something)
set(vars_MyVar2 something)
getListOfVarsStartingWith(vars_)
?
The function getListOfVarsStartingWith
can be written in the following way:
function (getListOfVarsStartingWith _prefix _varResult)
get_cmake_property(_vars VARIABLES)
string (REGEX MATCHALL "(^|;)${_prefix}[A-Za-z0-9_]*" _matchedVars "${_vars}")
set (${_varResult} ${_matchedVars} PARENT_SCOPE)
endfunction()
The functions uses the CMake function string(REGEX MATCHALL
to compute all matched variable names without a loop. Here is a usage example:
set(vars_MyVar1 something)
set(vars_MyVar2 something)
getListOfVarsStartingWith("vars_" matchedVars)
foreach (_var IN LISTS matchedVars)
message("${_var}=${${_var}}")
endforeach()
If the search should only return cache variables, use the following function:
function (getListOfVarsStartingWith _prefix _varResult)
get_cmake_property(_vars CACHE_VARIABLES)
string (REGEX MATCHALL "(^|;)${_prefix}[A-Za-z0-9_]*" _matchedVars "${_vars}")
set (_resultVars "")
foreach (_variable ${_matchedVars})
get_property(_type CACHE "${_variable}" PROPERTY TYPE)
if (NOT "${_type}" STREQUAL "STATIC")
list (APPEND _resultVars "${_variable}")
endif()
endforeach()
set (${_varResult} ${_resultVars} PARENT_SCOPE)
endfunction()
This function queries the CACHE_VARIABLES
property and also makes sure that cache variables of type STATIC
, which are used by CMake internally, are not returned.
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