Trait FormatRustcStyle 

pub trait FormatRustcStyle {
    // Required method
    fn format_rustc_style(
        &self,
        source_code: &str,
        filename: &str,
        start_line: u32,
        renderer: &Renderer,
    ) -> String;
}

Extension trait that adds rustc-style formatting to anyhow::Error.

Import this trait to call .format_rustc_style(...) directly on an anyhow::Error. If the error carries a SpanContext (added during op execution with the span-diagnostics feature), the output includes a source-location annotation. Otherwise it falls back to self.to_string().

Examples

use annotate_snippets::Renderer;
use cel_parser::FormatRustcStyle;

let err = anyhow::anyhow!("something went wrong");
let output = err.format_rustc_style("1 + 2", "example.cel", 1, &Renderer::plain());
assert_eq!(output, "something went wrong");

Required Methods

fn format_rustc_style( &self, source_code: &str, filename: &str, start_line: u32, renderer: &Renderer, ) -> String

Formats in rustc diagnostic style.

If the error carries a SpanContext, produces a multi-line caret diagnostic. Uses the root failure as the diagnostic title, regardless of textual context wrappers. Otherwise returns self.to_string().

• Complexity: O(c + s) traversal work for c error-chain links and s source bytes, plus error-display and renderer-layout costs; O(c + s + b) auxiliary/output space for b output bytes. Unlocated errors do not inspect the source.

Examples

use annotate_snippets::Renderer;
use cel_parser::{FormatRustcStyle, SourceSpan, SpanContext};
let error = anyhow::anyhow!("division by zero")
    .context(SpanContext::new(SourceSpan::new(1, 0, 1, 1)));
let text = error.format_rustc_style("1", "input.cel", 1, &Renderer::plain());
assert!(text.contains("error: division by zero"));
assert!(text.contains("input.cel:1:1"));

See the FormatRustcStyle example for the unlocated fallback.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl FormatRustcStyle for Error

fn format_rustc_style( &self, source_code: &str, filename: &str, start_line: u32, renderer: &Renderer, ) -> String

Renders the located root failure, or the outer display text when no location exists.

• Complexity: Matches FormatRustcStyle::format_rustc_style.

Implementors