Levels
Errors indicate code that is potentially unsafe or likely to lead to bugs.
Errors indicate code that is potentially unsafe or likely to lead to bugs.
An example is use of nulls. Use of nulls can lead to NullPointerExceptions and should be avoided.
Infos are used for code which is semantically fine, but there exists a more idomatic way of writing it.
Infos are used for code which is semantically fine, but there exists a more idomatic way of writing it.
An example would be using an if statement to return true or false as the last statement in a block. Eg,
def foo = { if (a) true else false }
Can be re-written as
def foo = a
Warnings are reserved for code that has bad semantics.
Warnings are reserved for code that has bad semantics. This by itself does not necessarily mean the code is buggy, but could mean the developer made a mistake or does not fully understand the contructs or best practice.
An example is an expression as a statement. While this is perfectly legal, it could indicate that the developer meant to assign the result to or otherwise use it.
Another example is a constant if. You can do things like if (true) { } if you want, but since the block will always evaluate, the if statement perhaps indicates a mistake.