rust/src/test/compile-fail/privacy3.rs

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Extract privacy checking from name resolution This commit is the culmination of my recent effort to refine Rust's notion of privacy and visibility among crates. The major goals of this commit were to remove privacy checking from resolve for the sake of sane error messages, and to attempt a much more rigid and well-tested implementation of visibility throughout rust. The implemented rules for name visibility are: 1. Everything pub from the root namespace is visible to anyone 2. You may access any private item of your ancestors. "Accessing a private item" depends on what the item is, so for a function this means that you can call it, but for a module it means that you can look inside of it. Once you look inside a private module, any accessed item must be "pub from the root" where the new root is the private module that you looked into. These rules required some more analysis results to get propagated from trans to privacy in the form of a few hash tables. I added a new test in which my goal was to showcase all of the privacy nuances of the language, and I hope to place any new bugs into this file to prevent regressions. Overall, I was unable to completely remove the notion of privacy from resolve. One use of privacy is for dealing with glob imports. Essentially a glob import can only import *public* items from the destination, and because this must be done at namespace resolution time, resolve must maintain the notion of "what items are public in a module". There are some sad approximations of privacy, but I unfortunately can't see clear methods to extract them outside. The other use case of privacy in resolve now is one that must stick around regardless of glob imports. When dealing with privacy, checking a private path needs to know "what the last private thing was" when looking at a path. Resolve is the only compiler pass which knows the answer to this question, so it maintains the answer on a per-path resolution basis (works similarly to the def_map generated). Closes #8215
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// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
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#[feature(globs)];
Extract privacy checking from name resolution This commit is the culmination of my recent effort to refine Rust's notion of privacy and visibility among crates. The major goals of this commit were to remove privacy checking from resolve for the sake of sane error messages, and to attempt a much more rigid and well-tested implementation of visibility throughout rust. The implemented rules for name visibility are: 1. Everything pub from the root namespace is visible to anyone 2. You may access any private item of your ancestors. "Accessing a private item" depends on what the item is, so for a function this means that you can call it, but for a module it means that you can look inside of it. Once you look inside a private module, any accessed item must be "pub from the root" where the new root is the private module that you looked into. These rules required some more analysis results to get propagated from trans to privacy in the form of a few hash tables. I added a new test in which my goal was to showcase all of the privacy nuances of the language, and I hope to place any new bugs into this file to prevent regressions. Overall, I was unable to completely remove the notion of privacy from resolve. One use of privacy is for dealing with glob imports. Essentially a glob import can only import *public* items from the destination, and because this must be done at namespace resolution time, resolve must maintain the notion of "what items are public in a module". There are some sad approximations of privacy, but I unfortunately can't see clear methods to extract them outside. The other use case of privacy in resolve now is one that must stick around regardless of glob imports. When dealing with privacy, checking a private path needs to know "what the last private thing was" when looking at a path. Resolve is the only compiler pass which knows the answer to this question, so it maintains the answer on a per-path resolution basis (works similarly to the def_map generated). Closes #8215
2013-10-05 16:37:39 -05:00
#[no_std]; // makes debugging this test *a lot* easier (during resolve)
// Test to make sure that private items imported through globs remain private
// when they're used.
mod bar {
pub use self::glob::*;
mod glob {
fn gpriv() {}
}
}
pub fn foo() {}
fn test1() {
use bar::gpriv; //~ ERROR: unresolved import
//~^ ERROR: failed to resolve
gpriv();
}
#[start] fn main(_: int, _: **u8) -> int { 3 }