With a bit of fiddeling you can use every kind of bracket to basically make function calls in c++
Here are the links to the snippets, all compile and run
Rust: https://godbolt.org/z/bM3d7bG14
I think you're confusing two things. In the meme at the top, "curved" brackets means parentheses, not curly brackets.
In American English:
( ) parentheses
{ } braces, curly braces or curly brackets
[ ] square brackets
< > angle brackets