What's the best way to handle Spacing in grammars where it's everywehre?

[chichid]

What's the best way to "ignore" some characters everywhere (whitespacing)?

For example:

int abc = 123;

Would be equivalent to 

int                        abc 
= 123;

For now the only way I see would be to use the _ rules, but I'm wondering if there is an easier way to avoid putting "_" all over the place for grammars where whitespaces are everywhere.

So for instead of something like this:

_ = (" " \ "\t" "\n")*
rule some_rule = _ "abc" _ "efg" _ 

The process would be:

----> Configure that Space, \n and Tab should be considered as whitespace
rule some_rule = "abc" "efg"
                     |||
 PEG would use the default white space for this

Thanks!