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use annotate_snippets::{Level, Renderer, Snippet};
fn main() {
let source = r#") -> Option<String> {
for ann in annotations {
match (ann.range.0, ann.range.1) {
(None, None) => continue,
(Some(start), Some(end)) if start > end_index => continue,
(Some(start), Some(end)) if start >= start_index => {
let label = if let Some(ref label) = ann.label {
format!(" {}", label)
} else {
String::from("")
};
return Some(format!(
"{}{}{}",
" ".repeat(start - start_index),
"^".repeat(end - start),
label
));
}
_ => continue,
}
}"#;
let message = Level::Error.title("mismatched types").id("E0308").snippet(
Snippet::source(source)
.line_start(51)
.origin("src/format.rs")
.annotation(
Level::Warning
.span(5..19)
.label("expected `Option<String>` because of return type"),
)
.annotation(
Level::Error
.span(26..724)
.label("expected enum `std::option::Option`"),
),
);
let renderer = Renderer::styled();
anstream::println!("{}", renderer.render(message));
}
|
