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use rustc::lint::*;
use syntax::ast::*;
use syntax::codemap::Span;
use syntax::symbol::InternedString;
use utils::span_lint;
declare_lint! {
pub UNSAFE_REMOVED_FROM_NAME,
Warn,
"`unsafe` removed from API names on import"
}
pub struct UnsafeNameRemoval;
impl LintPass for UnsafeNameRemoval {
fn get_lints(&self) -> LintArray {
lint_array!(UNSAFE_REMOVED_FROM_NAME)
}
}
impl EarlyLintPass for UnsafeNameRemoval {
fn check_item(&mut self, cx: &EarlyContext, item: &Item) {
if let ItemKind::Use(ref item_use) = item.node {
match item_use.node {
ViewPath_::ViewPathSimple(ref name, ref path) => {
unsafe_to_safe_check(path.segments
.last()
.expect("use paths cannot be empty")
.identifier,
*name,
cx,
&item.span);
},
ViewPath_::ViewPathList(_, ref path_list_items) => {
for path_list_item in path_list_items.iter() {
let plid = path_list_item.node;
if let Some(rename) = plid.rename {
unsafe_to_safe_check(plid.name, rename, cx, &item.span);
};
}
},
ViewPath_::ViewPathGlob(_) => {},
}
}
}
}
fn unsafe_to_safe_check(old_name: Ident, new_name: Ident, cx: &EarlyContext, span: &Span) {
let old_str = old_name.name.as_str();
let new_str = new_name.name.as_str();
if contains_unsafe(&old_str) && !contains_unsafe(&new_str) {
span_lint(cx,
UNSAFE_REMOVED_FROM_NAME,
*span,
&format!("removed \"unsafe\" from the name of `{}` in use as `{}`", old_str, new_str));
}
}
fn contains_unsafe(name: &InternedString) -> bool {
name.contains("Unsafe") || name.contains("unsafe")
}