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If: Support the 'DEFINED CACHE{}' syntax

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This commit is contained in:
Robert Maynard 2018-11-02 17:27:09 -04:00
parent 9463d73cc4
commit 1222f02e34
4 changed files with 24 additions and 5 deletions
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9
Help/command/if.rst
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@ -187,11 +187,10 @@ Possible conditions are:
``if(<variable|string> IN_LIST <variable>)``
True if the given element is contained in the named list variable.
``if(DEFINED <name>|ENV{<name>})``
True if a variable or environment variable
with given ``<name>`` is defined.
The value of the variable does not matter.
Note that macro arguments are not variables.
``if(DEFINED <name>|CACHE{<name>}|ENV{<name>})``
True if a variable, cache variable or environment variable
with given ``<name>`` is defined. The value of the variable
does not matter. Note that macro arguments are not variables.
``if((condition) AND (condition OR (condition)))``
The conditions inside the parenthesis are evaluated first and then

5
Help/release/dev/if-supports-cache-defined.rst Normal file
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@ -0,0 +1,5 @@
if-supports-cache-defined
-------------------------
* The :command:`if` command gained support for checking if cache variables
are defined with the ``DEFINED CACHE{VAR}`` syntax.

6
Source/cmConditionEvaluator.cxx
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@ -495,6 +495,12 @@ bool cmConditionEvaluator::HandleLevel1(cmArgumentList& newArgs, std::string&,
argP1->GetValue().operator[](argP1len - 1) == '}') {
std::string env = argP1->GetValue().substr(4, argP1len - 5);
bdef = cmSystemTools::HasEnv(env);
} else if (argP1len > 6 &&
argP1->GetValue().substr(0, 6) == "CACHE{" &&
argP1->GetValue().operator[](argP1len - 1) == '}') {
std::string cache = argP1->GetValue().substr(6, argP1len - 7);
bdef =
this->Makefile.GetState()->GetCacheEntryValue(cache) != nullptr;
} else {
bdef = this->Makefile.IsDefinitionSet(argP1->GetValue());
}

9
Tests/Unset/CMakeLists.txt
View File

@ -21,17 +21,26 @@ set(x 43)
if(NOT x EQUAL 43)
message(FATAL_ERROR "x!=43")
endif()
if(DEFINED CACHE{x})
message(FATAL_ERROR "x shouldn't be found in the cache")
endif()
set(x)
if(DEFINED x)
message(FATAL_ERROR "x should be undefined now!")
endif()
# Cache variable
set(BAR "test" CACHE STRING "documentation")
if(NOT DEFINED BAR)
message(FATAL_ERROR "BAR not defined")
endif()
if(NOT DEFINED CACHE{BAR})
message(FATAL_ERROR "BAR could not be found by CACHE{BAR}")
endif()
# Test interaction of cache entries with variables.
set(BAR "test-var")
if(NOT "$CACHE{BAR}" STREQUAL "test")