pub static TEXT_DIRECTION_CODEPOINT_IN_LITERAL: &Lint
Expand description
The text_direction_codepoint_in_literal
lint detects Unicode codepoints that change the
visual representation of text on screen in a way that does not correspond to their on
memory representation.
§Explanation
The unicode characters \u{202A}
, \u{202B}
, \u{202D}
, \u{202E}
, \u{2066}
,
\u{2067}
, \u{2068}
, \u{202C}
and \u{2069}
make the flow of text on screen change
its direction on software that supports these codepoints. This makes the text “abc” display
as “cba” on screen. By leveraging software that supports these, people can write specially
crafted literals that make the surrounding code seem like it’s performing one action, when
in reality it is performing another. Because of this, we proactively lint against their
presence to avoid surprises.
§Example
#![deny(text_direction_codepoint_in_literal)]
fn main() {
println!("{:?}", '');
}
{{produces}}