[−][src]Trait proc_macro2_diagnostics::SpanDiagnosticExt

pub trait SpanDiagnosticExt {
    fn error<T: Into<String>>(self, message: T) -> Diagnostic;

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

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

    fn help<T: Into<String>>(self, message: T) -> Diagnostic;
}

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: Into<String>>(self, message: T) -> Diagnostic

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

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

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

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

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

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

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

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Implementations on Foreign Types

impl SpanDiagnosticExt for Span[src]

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Implementors

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