Keeping whitespace during alignment

[mikelui]

I'm having trouble with the following example. I'm not sure if there's a feature that I'm missing.

Say I have this text

    auto Foo() -> void;
    auto Bar(const char *str) const -> void;
    auto Baz(unsigned val) const -> void;
    auto Qux() const -> int;
    auto FooBar(unsigned val, unsigned num) -> void;

And I want it to align it on -> and const:

    auto Foo()                              -> void;
    auto Bar(const char *str)         const -> void;
    auto Baz(unsigned val)            const -> void;
    auto Qux()                        const -> int;
    auto FooBar(unsigned val, unsigned num) -> void;

The closest I've gotten is :EasyAlign /\(const ->\|->\)/:

    auto Foo()                                    -> void;
    auto Bar(const char *str)               const -> void;
    auto Baz(unsigned val)                  const -> void;
    auto Qux()                              const -> int;
    auto FooBar(unsigned val, unsigned num)       -> void;

But I don't want the whitespace before the -> on the last line.

Or If I align on the consts I get:

    auto Foo()                              -> void;
    auto Bar(const char *str) const -> void;
    auto Baz(unsigned val)    const -> void;
    auto Qux()                const -> int;
    auto FooBar(unsigned val, unsigned num) -> void;

and then align again on ->

    auto Foo()                              -> void;
    auto Bar(const char *str) const         -> void;
    auto Baz(unsigned val)    const         -> void;
    auto Qux()                const         -> int;
    auto FooBar(unsigned val, unsigned num) -> void;

In the last example, if I right align on const and keep the whitespace, then that solves my problem, but I'm not quite sure how to get there. Any suggestions?

[junegunn]

I don't think easy-align supports the behavior you're trying to achieve. You'll have to preprocess or postprocess the output using :s command (e.g. :'<,'>s/ const\( *\)->/\1const ->/) or some vimscript.