Add the JOIN generator expression.

This generator expression joins a list with a separator. The separator
may contain arbitrary content, such as commas, which is ordinarily a
delimiter in the generator expression syntax.

2 files changed, 23 insertions, 3 deletions

diff --git a/Tests/CompileDefinitions/compiletest.cpp b/Tests/CompileDefinitions/compiletest.cpp
index 14b8eab..7379380 100644
--- a/Tests/CompileDefinitions/compiletest.cpp
+++ b/Tests/CompileDefinitions/compiletest.cpp
@@ -20,10 +20,16 @@ static const char very_fun_string[] = CMAKE_IS_REALLY;
 #endif
 
 enum {
-  StringLiteralTest1 = sizeof(CMakeStaticAssert<sizeof(CMAKE_IS_) == sizeof("Fun")>)
+  StringLiteralTest1 = sizeof(CMakeStaticAssert<sizeof(CMAKE_IS_) == sizeof("Fun")>),
 #ifndef NO_SPACES_IN_DEFINE_VALUES
-  ,
-  StringLiteralTest2 = sizeof(CMakeStaticAssert<sizeof(CMAKE_IS_REALLY) == sizeof("Very Fun")>)
+  StringLiteralTest2 = sizeof(CMakeStaticAssert<sizeof(CMAKE_IS_REALLY) == sizeof("Very Fun")>),
+#endif
+#ifdef TEST_GENERATOR_EXPRESSIONS
+  StringLiteralTest3 = sizeof(CMakeStaticAssert<sizeof(LETTER_LIST1) == sizeof("A,B,C,D")>),
+  StringLiteralTest4 = sizeof(CMakeStaticAssert<sizeof(LETTER_LIST2) == sizeof("A,,B,,C,,D")>),
+  StringLiteralTest5 = sizeof(CMakeStaticAssert<sizeof(LETTER_LIST3) == sizeof("A,-B,-C,-D")>),
+  StringLiteralTest6 = sizeof(CMakeStaticAssert<sizeof(LETTER_LIST4) == sizeof("A-,-B-,-C-,-D")>),
+  StringLiteralTest7 = sizeof(CMakeStaticAssert<sizeof(LETTER_LIST5) == sizeof("A-,B-,C-,D")>)
 #endif
 };
 
@@ -42,6 +48,14 @@ enum {
 #error Expected define expanded from list
 #endif
 
+#ifndef PREFIX_DEF1
+#error Expect PREFIX_DEF1
+#endif
+
+#ifndef PREFIX_DEF2
+#error Expect PREFIX_DEF2
+#endif
+
 // TEST_GENERATOR_EXPRESSIONS
 #endif
 
diff --git a/Tests/CompileDefinitions/target_prop/CMakeLists.txt b/Tests/CompileDefinitions/target_prop/CMakeLists.txt
index 1ef2d6d..34be917 100644
--- a/Tests/CompileDefinitions/target_prop/CMakeLists.txt
+++ b/Tests/CompileDefinitions/target_prop/CMakeLists.txt
@@ -13,6 +13,12 @@ set_property(TARGET target_prop_executable APPEND PROPERTY COMPILE_DEFINITIONS
     "$<1:CMAKE_IS_DECLARATIVE>"
     "$<0:GE_NOT_DEFINED>"
     "$<1:ARGUMENT;LIST>"
+    PREFIX_$<JOIN:DEF1;DEF2,;PREFIX_>
+    LETTER_LIST1=\"$<JOIN:A;B;C;D,,>\"
+    LETTER_LIST2=\"$<JOIN:A;B;C;D,,,>\"
+    LETTER_LIST3=\"$<JOIN:A;B;C;D,,->\"
+    LETTER_LIST4=\"$<JOIN:A;B;C;D,-,->\"
+    LETTER_LIST5=\"$<JOIN:A;B;C;D,-,>\"
 )
 
 set_property(TARGET target_prop_executable APPEND PROPERTY COMPILE_DEFINITIONS