perfectionist 0.0.0-rc.18

Additional linting rules for Rust projects
Documentation 
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//! Diagnostic emission for the two violation shapes.

use clippy_utils::diagnostics::span_lint_hir_and_then;
use rustc_errors::Applicability;
use rustc_hir as hir;
use rustc_lint::LateContext;
use rustc_span::Span;

use super::MACRO_TRAILING_COMMA;

pub(super) fn emit_insert(lint_context: &LateContext<'_>, hir_id: hir::HirId, insert_at: Span) {
    span_lint_hir_and_then(
        lint_context,
        MACRO_TRAILING_COMMA,
        hir_id,
        insert_at,
        "multi-line macro invocation should end with a trailing comma",
        |diag| {
            diag.span_suggestion(
                insert_at,
                "add a trailing comma",
                ",",
                Applicability::MachineApplicable,
            );
        },
    );
}

pub(super) fn emit_remove(lint_context: &LateContext<'_>, hir_id: hir::HirId, comma_span: Span) {
    span_lint_hir_and_then(
        lint_context,
        MACRO_TRAILING_COMMA,
        hir_id,
        comma_span,
        "single-line macro invocation should not end with a trailing comma",
        |diag| {
            diag.span_suggestion(
                comma_span,
                "remove the trailing comma",
                "",
                Applicability::MachineApplicable,
            );
        },
    );
}