src/tools/clippy/tests/ui/collapsible_span_lint_calls.rs

   1 // run-rustfix
   2 #![deny(clippy::internal)]
   3 #![feature(rustc_private)]
   4
   5 extern crate rustc_ast;
   6 extern crate rustc_errors;
   7 extern crate rustc_lint;
   8 extern crate rustc_session;
   9 extern crate rustc_span;
  10
  11 use rustc_ast::ast::Expr;
  12 use rustc_errors::{Applicability, DiagnosticBuilder};
  13 use rustc_lint::{EarlyContext, EarlyLintPass, Lint, LintContext};
  14 use rustc_session::{declare_lint_pass, declare_tool_lint};
  15 use rustc_span::source_map::Span;
  16
  17 #[allow(unused_variables)]
  18 pub fn span_lint_and_then<'a, T: LintContext, F>(cx: &'a T, lint: &'static Lint, sp: Span, msg: &str, f: F)
  19 where
  20     F: for<'b> FnOnce(&mut DiagnosticBuilder<'b>),
  21 {
  22 }
  23
  24 #[allow(unused_variables)]
  25 fn span_lint_and_help<'a, T: LintContext>(
  26     cx: &'a T,
  27     lint: &'static Lint,
  28     span: Span,
  29     msg: &str,
  30     option_span: Option<Span>,
  31     help: &str,
  32 ) {
  33 }
  34
  35 #[allow(unused_variables)]
  36 fn span_lint_and_note<'a, T: LintContext>(
  37     cx: &'a T,
  38     lint: &'static Lint,
  39     span: Span,
  40     msg: &str,
  41     note_span: Option<Span>,
  42     note: &str,
  43 ) {
  44 }
  45
  46 #[allow(unused_variables)]
  47 fn span_lint_and_sugg<'a, T: LintContext>(
  48     cx: &'a T,
  49     lint: &'static Lint,
  50     sp: Span,
  51     msg: &str,
  52     help: &str,
  53     sugg: String,
  54     applicability: Applicability,
  55 ) {
  56 }
  57
  58 declare_tool_lint! {
  59     pub clippy::TEST_LINT,
  60     Warn,
  61     "",
  62     report_in_external_macro: true
  63 }
  64
  65 declare_lint_pass!(Pass => [TEST_LINT]);
  66
  67 impl EarlyLintPass for Pass {
  68     fn check_expr(&mut self, cx: &EarlyContext, expr: &Expr) {
  69         let lint_msg = "lint message";
  70         let help_msg = "help message";
  71         let note_msg = "note message";
  72         let sugg = "new_call()";
  73         let predicate = true;
  74
  75         span_lint_and_then(cx, TEST_LINT, expr.span, lint_msg, |db| {
  76             db.span_suggestion(expr.span, help_msg, sugg.to_string(), Applicability::MachineApplicable);
  77         });
  78         span_lint_and_then(cx, TEST_LINT, expr.span, lint_msg, |db| {
  79             db.span_help(expr.span, help_msg);
  80         });
  81         span_lint_and_then(cx, TEST_LINT, expr.span, lint_msg, |db| {
  82             db.help(help_msg);
  83         });
  84         span_lint_and_then(cx, TEST_LINT, expr.span, lint_msg, |db| {
  85             db.span_note(expr.span, note_msg);
  86         });
  87         span_lint_and_then(cx, TEST_LINT, expr.span, lint_msg, |db| {
  88             db.note(note_msg);
  89         });
  90
  91         // This expr shouldn't trigger this lint.
  92         span_lint_and_then(cx, TEST_LINT, expr.span, lint_msg, |db| {
  93             db.note(note_msg);
  94             if predicate {
  95                 db.note(note_msg);
  96             }
  97         })
  98     }
  99 }
 100
 101 fn main() {}