src/tools/clippy/clippy_lints/src/misc_early/zero_prefixed_literal.rs

   1 use clippy_utils::diagnostics::span_lint_and_then;
   2 use rustc_ast::ast::Lit;
   3 use rustc_errors::Applicability;
   4 use rustc_lint::EarlyContext;
   5
   6 use super::ZERO_PREFIXED_LITERAL;
   7
   8 pub(super) fn check(cx: &EarlyContext<'_>, lit: &Lit, lit_snip: &str) {
   9     span_lint_and_then(
  10         cx,
  11         ZERO_PREFIXED_LITERAL,
  12         lit.span,
  13         "this is a decimal constant",
  14         |diag| {
  15             diag.span_suggestion(
  16                 lit.span,
  17                 "if you mean to use a decimal constant, remove the `0` to avoid confusion",
  18                 lit_snip.trim_start_matches(|c| c == '_' || c == '0').to_string(),
  19                 Applicability::MaybeIncorrect,
  20             );
  21             diag.span_suggestion(
  22                 lit.span,
  23                 "if you mean to use an octal constant, use `0o`",
  24                 format!("0o{}", lit_snip.trim_start_matches(|c| c == '_' || c == '0')),
  25                 Applicability::MaybeIncorrect,
  26             );
  27         },
  28     );
  29 }