[clang-format] SpacesInSquareBrackets not working for Java (llvm#77833)

spaces in [] needs to be handled the same in Java the same as C#.

Co-authored-by: paul_hoad <[email protected]>

Author: mydeveloperday

clang/lib/Format/TokenAnnotator.cpp

@@ -4674,6 +4674,10 @@ bool TokenAnnotator::spaceRequiredBefore(const AnnotatedLine &Line,
   } else if (Style.Language == FormatStyle::LK_Java) {
     if (Left.is(tok::r_square) && Right.is(tok::l_brace))
       return true;
+    // spaces inside square brackets.
+    if (Left.is(tok::l_square) || Right.is(tok::r_square))
+      return Style.SpacesInSquareBrackets;
+
     if (Left.is(Keywords.kw_synchronized) && Right.is(tok::l_paren)) {
       return Style.SpaceBeforeParensOptions.AfterControlStatements ||
              spaceRequiredBeforeParens(Right);

clang/unittests/Format/FormatTestJava.cpp

@@ -603,6 +603,21 @@ TEST_F(FormatTestJava, ShortFunctions) {
                Style);
 }
 
+TEST_F(FormatTestJava, ConfigurableSpacesInSquareBrackets) {
+  FormatStyle Spaces = getLLVMStyle(FormatStyle::LK_Java);
+
+  verifyFormat("Object[] arguments", Spaces);
+  verifyFormat("final Class<?>[] types = new Class<?>[numElements];", Spaces);
+  verifyFormat("types[i] = arguments[i].getClass();", Spaces);
+
+  Spaces.SpacesInSquareBrackets = true;
+
+  verifyFormat("Object[ ] arguments", Spaces);
+  verifyFormat("final Class<?>[ ] types = new Class<?>[ numElements ];",
+               Spaces);
+  verifyFormat("types[ i ] = arguments[ i ].getClass();", Spaces);
+}
+
 } // namespace
 } // namespace test
 } // namespace format