Right-associative operators are parsed left-associative

[mohe2015]

Describe the bug

According to https://nixos.org/manual/nix/unstable/expressions/language-operators.html and to testing
-> and ++ and // should be parsed right-associative but are not currently.

Code Snippet to reproduce

echo "false -> true -> false" | cargo run --quiet --example from-stdin
NODE_ROOT 0..23 {
  NODE_BIN_OP 0..22 {
    NODE_BIN_OP 0..13 {
      TOKEN_IDENT("false") 0..5
      TOKEN_IMPLICATION("->") 6..8
      TOKEN_IDENT("true") 9..13
    }
    TOKEN_IMPLICATION("->") 14..16
    TOKEN_IDENT("false") 17..22
  }
}

# nix repl
false -> true -> false
true

(false -> true) -> false
false

Expected behavior

Additional context

I think this only matters for implies and not the other two.