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use clippy_utils::diagnostics::span_lint_and_then;
use rustc_ast::ast::Lit;
use rustc_errors::Applicability;
use rustc_lint::EarlyContext;
use super::ZERO_PREFIXED_LITERAL;
pub(super) fn check(cx: &EarlyContext<'_>, lit: &Lit, lit_snip: &str) {
span_lint_and_then(
cx,
ZERO_PREFIXED_LITERAL,
lit.span,
"this is a decimal constant",
|diag| {
diag.span_suggestion(
lit.span,
"if you mean to use a decimal constant, remove the `0` to avoid confusion",
lit_snip.trim_start_matches(|c| c == '_' || c == '0').to_string(),
Applicability::MaybeIncorrect,
);
diag.span_suggestion(
lit.span,
"if you mean to use an octal constant, use `0o`",
format!("0o{}", lit_snip.trim_start_matches(|c| c == '_' || c == '0')),
Applicability::MaybeIncorrect,
);
},
);
}
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