Trait devise_core::ext::SpanDiagnosticExt

pub trait SpanDiagnosticExt {
    // Required methods
    fn error<T>(self, message: T) -> Diagnostic
       where T: Into<String>;
    fn warning<T>(self, message: T) -> Diagnostic
       where T: Into<String>;
    fn note<T>(self, message: T) -> Diagnostic
       where T: Into<String>;
    fn help<T>(self, message: T) -> Diagnostic
       where T: Into<String>;
}

Extension trait for proc_macro2::Span emulating the proc-macro diagnostic API on stable and nightly.

Example

use proc_macro2::Span;
use proc_macro2_diagnostics::SpanDiagnosticExt;

let span = Span::call_site();
let diag = span.error("there's a problem here...");

// emit into an expression context.
let tokens = diag.emit_as_expr_tokens();

// or emit into an item context.
let tokens = diag.emit_as_item_tokens();

Required Methods

fn error<T>(self, message: T) -> Diagnostic

where T: Into<String>,

Create a new Diagnostic of the kind of this method’s name with the span self.

fn warning<T>(self, message: T) -> Diagnostic

where T: Into<String>,

Create a new Diagnostic of the kind of this method’s name with the span self.

fn note<T>(self, message: T) -> Diagnostic

where T: Into<String>,

Create a new Diagnostic of the kind of this method’s name with the span self.

fn help<T>(self, message: T) -> Diagnostic

where T: Into<String>,

Create a new Diagnostic of the kind of this method’s name with the span self.

Object Safety

This trait is not object safe.

Implementations on Foreign Types

impl SpanDiagnosticExt for Span

fn error<T>(self, message: T) -> Diagnostic

where T: Into<String>,

fn warning<T>(self, message: T) -> Diagnostic

where T: Into<String>,

fn note<T>(self, message: T) -> Diagnostic

where T: Into<String>,

fn help<T>(self, message: T) -> Diagnostic

where T: Into<String>,

Implementors