break up lints.rs into separate files

components/plugins/lints/privatize.rs

@@ -0,0 +1,38 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use syntax::{ast, ast_util};
+use syntax::ast::Public;
+use syntax::attr::AttrMetaMethods;
+use rustc::lint::{Context, LintPass, LintArray};
+use rustc::middle::ty;
+use rustc::middle::typeck::astconv::AstConv;
+
+declare_lint!(PRIVATIZE, Deny,
+              "Allows to enforce private fields for struct definitions")
+
+/// Lint for keeping DOM fields private
+///
+/// This lint (disable with `-A privatize`/`#[allow(privatize)]`) ensures all types marked with `#[privatize]` have no private fields
+pub struct PrivatizePass;
+
+impl LintPass for PrivatizePass {
+    fn get_lints(&self) -> LintArray {
+        lint_array!(PRIVATIZE)
+    }
+
+    fn check_struct_def(&mut self, cx: &Context, def: &ast::StructDef, _i: ast::Ident, _gen: &ast::Generics, id: ast::NodeId) {
+        if ty::has_attr(cx.tcx, ast_util::local_def(id), "privatize") {
+            for field in def.fields.iter() {
+                match field.node {
+                    ast::StructField_ { kind: ast::NamedField(ident, visibility), .. } if visibility == Public => {
+                        cx.span_lint(PRIVATIZE, field.span,
+                                     format!("Field {} is public where only private fields are allowed", ident.name).as_slice());
+                    }
+                    _ => {}
+                }
+            }
+        }
+    }
+}