Struct rslint_core::groups::errors::NoConstantCondition [−][src]
pub struct NoConstantCondition {}
Expand description
Disallow constant conditions which always yield one result.
Constant conditions such as if (true) {}
are almost always a mistake. Constant
conditions always yield a single result which almost always ends up in unwanted behavior.
This rule is aimed at catching those conditions in if
, do while
, while
, and for
statements, as well as
conditional expressions.
Incorrect Code Examples
if (true) {
// ^ this block is always used
} else {
//^^^^ this else block is unreachable
}
// This loop endlessly runs
for(foo = 5; 5; foo++) {
}
Correct Code Examples
if (foo) {
/* */
}
Implementations
Trait Implementations
Check an individual node in the syntax tree.
You can use the match_ast
macro to make matching a node to an ast node easier.
The reason this uses nodes and not a visitor is because nodes are more flexible,
converting them to an AST node has zero cost and you can easily traverse surrounding nodes.
Defaults to doing nothing. Read more
Check an individual token in the syntax tree. Defaults to doing nothing. Read more
Check the root of the tree one time.
This method is guaranteed to only be called once.
The root’s kind will be either SCRIPT
or MODULE
.
Defaults to doing nothing. Read more
Returns the “default value” for a type. Read more
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
A list of tags present on this rule. Empty by default.
Whether this rule is recommended, this is a simple helper around Self::tags
.
Auto Trait Implementations
impl RefUnwindSafe for NoConstantCondition
impl Send for NoConstantCondition
impl Sync for NoConstantCondition
impl Unpin for NoConstantCondition
impl UnwindSafe for NoConstantCondition
Blanket Implementations
Mutably borrows from an owned value. Read more
Whether this implementor has acknowledged the 1.1.0 update to
unerase
’s documented implementation requirements. Read more