Genex: Add {UPPER,LOWER}_CASE and MAKE_C_IDENTIFIER.

Help/manual/cmake-generator-expressions.7.rst

@@ -178,3 +178,9 @@ property is non-empty::
   Content of ``...`` when the property is exported using :command:`export`, or
   when the target is used by another target in the same buildsystem. Expands to
   the empty string otherwise.
+``$<LOWER_CASE:...>``
+  Content of ``...`` converted to lower case.
+``$<UPPER_CASE:...>``
+  Content of ``...`` converted to upper case.
+``$<MAKE_C_IDENTIFIER:...>``
+  Content of ``...`` converted to a C identifier.

Source/cmGeneratorExpressionEvaluator.cxx

@@ -198,6 +198,48 @@ static const struct StrEqualNode : public cmGeneratorExpressionNode
   }
 } strEqualNode;
 
+//----------------------------------------------------------------------------
+static const struct LowerCaseNode : public cmGeneratorExpressionNode
+{
+  LowerCaseNode() {}
+
+  std::string Evaluate(const std::vector<std::string> &parameters,
+                       cmGeneratorExpressionContext *,
+                       const GeneratorExpressionContent *,
+                       cmGeneratorExpressionDAGChecker *) const
+  {
+    return cmSystemTools::LowerCase(parameters.front());
+  }
+} lowerCaseNode;
+
+//----------------------------------------------------------------------------
+static const struct UpperCaseNode : public cmGeneratorExpressionNode
+{
+  UpperCaseNode() {}
+
+  std::string Evaluate(const std::vector<std::string> &parameters,
+                       cmGeneratorExpressionContext *,
+                       const GeneratorExpressionContent *,
+                       cmGeneratorExpressionDAGChecker *) const
+  {
+    return cmSystemTools::UpperCase(parameters.front());
+  }
+} upperCaseNode;
+
+//----------------------------------------------------------------------------
+static const struct MakeCIdentifierNode : public cmGeneratorExpressionNode
+{
+  MakeCIdentifierNode() {}
+
+  std::string Evaluate(const std::vector<std::string> &parameters,
+                       cmGeneratorExpressionContext *,
+                       const GeneratorExpressionContent *,
+                       cmGeneratorExpressionDAGChecker *) const
+  {
+    return cmSystemTools::MakeCidentifier(parameters.front().c_str());
+  }
+} makeCIdentifierNode;
+
 //----------------------------------------------------------------------------
 static const struct Angle_RNode : public cmGeneratorExpressionNode
 {
@@ -1442,6 +1484,12 @@ cmGeneratorExpressionNode* GetNode(const std::string &identifier)
     return &targetSoNameFileDirNode;
   else if (identifier == "STREQUAL")
     return &strEqualNode;
+  else if (identifier == "LOWER_CASE")
+    return &lowerCaseNode;
+  else if (identifier == "UPPER_CASE")
+    return &upperCaseNode;
+  else if (identifier == "MAKE_C_IDENTIFIER")
+    return &makeCIdentifierNode;
   else if (identifier == "BOOL")
     return &boolNode;
   else if (identifier == "ANGLE-R")

Tests/GeneratorExpression/CMakeLists.txt

@@ -193,6 +193,9 @@ add_custom_target(check-part3 ALL
     -Dtest_platform_id_Linux=$<PLATFORM_ID:Linux>
     -Dtest_platform_id_Windows=$<PLATFORM_ID:Windows>
     -Dtest_platform_id_Darwin=$<PLATFORM_ID:Darwin>
+    -Dlower_case=$<LOWER_CASE:MiXeD>
+    -Dupper_case=$<UPPER_CASE:MiXeD>
+    -Dmake_c_identifier=$<MAKE_C_IDENTIFIER:4foo:+bar-$>
     -P ${CMAKE_CURRENT_SOURCE_DIR}/check-part3.cmake
   COMMAND ${CMAKE_COMMAND} -E echo "check done (part 3 of 3)"
   VERBATIM

Tests/GeneratorExpression/check-part3.cmake

@@ -34,3 +34,6 @@ foreach(system Linux Windows Darwin)
     check(test_platform_id_${system} 0)
   endif()
 endforeach()
+check(lower_case "mixed")
+check(upper_case "MIXED")
+check(make_c_identifier "_4foo__bar__")