Static rustc_lint_defs::builtin::FUNCTION_ITEM_REFERENCES

pub static FUNCTION_ITEM_REFERENCES: &'static Lint

The function_item_references lint detects function references that are formatted with fmt::Pointer or transmuted.

Example

fn foo() { }

fn main() {
    println!("{:p}", &foo);
}

{{produces}}

Explanation

Taking a reference to a function may be mistaken as a way to obtain a pointer to that function. This can give unexpected results when formatting the reference as a pointer or transmuting it. This lint is issued when function references are formatted as pointers, passed as arguments bound by fmt::Pointer or transmuted.