E0004: Java-style array declarations aren't supported

Writing "int[] a = new int[10];" the way you would in Java doesn't work in C++. CppMode catches this specific pattern before compiling and points you to the right way to write it instead.

How to fix it

Use Array<T> instead, with the size in parentheses.

Example

Notes

Array<int> behaves exactly like a Java int array: it starts out filled with zeros, it has a fixed length, and reading or writing past the end of it throws a clear error instead of silently corrupting memory.