hydroflow_lang 0.10.0

Hydroflow's Surface Syntax implementation
Documentation 
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//! Pretty, human-readable printing of [`proc_macro2::Span`]s.

/// Helper struct which displays the span as `path:row:col` for human reading/IDE linking.
/// Example: `hydroflow\tests\surface_syntax.rs:42:18`.
pub struct PrettySpan(pub proc_macro2::Span);
impl std::fmt::Display for PrettySpan {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        #[cfg(feature = "diagnostics")]
        {
            if let Ok(span) = std::panic::catch_unwind(|| self.0.unwrap()) {
                write!(
                    f,
                    "{}:{}:{}",
                    span.source_file().path().display(),
                    span.start().line(),
                    span.start().column(),
                )?;
                return Ok(());
            }
        }

        write!(
            f,
            "nopath:{}:{}",
            self.0.start().line,
            self.0.start().column
        )
    }
}

/// Helper struct which displays the span as `row:col` for human reading.
pub struct PrettyRowCol(pub proc_macro2::Span);
impl std::fmt::Display for PrettyRowCol {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        let span = self.0;
        write!(f, "{}:{}", span.start().line, span.start().column)
    }
}