Xcode: Also quote strings containing // (#15487)

Otherwise those will be interpreted as start of a comment

Signed-off-by: Gregor Jasny <gjasny@googlemail.com>

Source/cmXCodeObject.cxx

@@ -242,6 +242,7 @@ void cmXCodeObject::PrintString(std::ostream& os,std::string String)
   // considered special by the Xcode project file parser.
   bool needQuote =
     (String.empty() ||
+     String.find("//") != String.npos ||
      String.find_first_of(" <>.+-=@$[],") != String.npos);
   const char* quote = needQuote? "\"" : "";
 

Tests/RunCMake/XcodeProject/RunCMakeTest.cmake

@@ -3,6 +3,7 @@ include(RunCMake)
 run_cmake(XcodeFileType)
 run_cmake(XcodeAttributeGenex)
 run_cmake(XcodeAttributeGenexError)
+run_cmake(XcodeObjectNeedsQuote)
 if (NOT XCODE_VERSION VERSION_LESS 6)
   run_cmake(XcodePlatformFrameworks)
 endif()

Tests/RunCMake/XcodeProject/XcodeObjectNeedsQuote-check.cmake

@@ -0,0 +1,7 @@
+set(expect "path = \"")
+file(STRINGS ${RunCMake_TEST_BINARY_DIR}/XcodeObjectNeedsQuote.xcodeproj/project.pbxproj actual
+     REGEX "path = [^;]*someFileWithoutSpecialChars[^;]*;" LIMIT_COUNT 1)
+if(NOT "${actual}" MATCHES "${expect}")
+  message(SEND_ERROR "The actual project contains the line:\n ${actual}\n"
+    "which does not match expected regex:\n ${expect}\n")
+endif()

Tests/RunCMake/XcodeProject/XcodeObjectNeedsQuote.cmake

@@ -0,0 +1,3 @@
+enable_language(C)
+add_library(some /${CMAKE_CURRENT_SOURCE_DIR}/someFileWithoutSpecialChars)
+set_property(SOURCE /${CMAKE_CURRENT_SOURCE_DIR}/someFileWithoutSpecialChars PROPERTY LANGUAGE C)