chore(test): Test macro expansion

Author: robertoraggi

.github/workflows/ci.yml

@@ -28,7 +28,7 @@ jobs:
       - name: Test
         working-directory: build
         run: |
-          ctest -v
+          ctest --verbose
 
   build-windows:
     runs-on: windows-latest
@@ -57,7 +57,7 @@ jobs:
       - name: Test
         working-directory: build
         run: |
-          ctest -v -C Release
+          ctest --verbose -C Release
 
   build-emscripten:
     runs-on: ubuntu-20.04

tests/unit_tests/preprocessor/define.003.cc

@@ -0,0 +1,12 @@
+// RUN: %cxx -verify -E %s -o - | filecheck %s
+
+#define FOR_EACH(V) \
+  V(aa)             \
+  V(bb)             \
+  V(cc)
+
+#define DECLARE_VAR(v) int v;
+
+int main() { FOR_EACH(DECLARE_VAR) }
+
+// CHECK: int aa;int bb;int cc;