Hints

Every hint is formed of two parts: the match and the suggestion.

Match AST is analysed against the code looking for any expressions in the code that matches. If there is a match then the suggestion AST is used to display a suggestion on how the code can be refactored.

Matching

• variable x
• wildcard _

Use variables to match expressions

not ((4 + 4) >= (x + 77 * (9 * y)))

into

(4 + 4) < (x + 77 * (9 * y))

• (4+4) = a
• x + 77 * (9 * y)) = b and so the rule becomes

not (a >= b) ===> a <  b