b21a6da340
#### Updated 1/12/2014
I updated the multi-line testcase to current but didn't modify the others. The spew code was broke by the `matches!` macro no longer working and I'm not interested in fixing the testcase.
I additionally added one testcase below.
Errors will in general look similar to below if the error is either `mismatched types` or a few other types. The rest are ignored.
---
#### Extra testcase:
```rust
pub trait Foo {
type A;
fn boo(&self) -> <Self as Foo>::A;
}
struct Bar;
impl Foo for i32 {
type A = u32;
fn boo(&self) -> u32 {
42
}
}
fn foo1<I: Foo<A=Bar>>(x: I) {
let _: Bar = x.boo();
}
fn foo2<I: Foo>(x: I) {
let _: Bar = x.boo();
}
pub fn baz(x: &Foo<A=Bar>) {
let _: Bar = x.boo();
}
pub fn main() {
let a = 42i32;
foo1(a);
baz(&a);
}
```
#### Multi-line output:
```cmd
$ ./rustc test3.rs
test3.rs:20:18: 20:25 error: mismatched types:
expected `Bar`,
found `<I as Foo>::A`
(expected struct `Bar`,
found associated type)
test3.rs:20 let _: Bar = x.boo();
^~~~~~~
test3.rs:31:5: 31:9 error: type mismatch resolving `<i32 as Foo>::A == Bar`:
expected u32,
found struct `Bar`
test3.rs:31 foo1(a);
^~~~
test3.rs:31:5: 31:9 note: required by `foo1`
test3.rs:31 foo1(a);
^~~~
test3.rs:32:9: 32:11 error: type mismatch resolving `<i32 as Foo>::A == Bar`:
expected u32,
found struct `Bar`
test3.rs:32 baz(&a);
^~
test3.rs:32:9: 32:11 note: required for the cast to the object type `Foo`
test3.rs:32 baz(&a);
^~
error: aborting due to 3 previous errors
```
---
This is a continuation of #19203 which I apparently broke by force pushing after it was closed. I'm attempting to add multi-line errors where they are largely beneficial - to help differentiate different types in compiler messages. As before, this is still a simple fix.
#### Testcase:
```rust
struct S;
fn test() -> Option<i32> {
let s: S;
s
}
fn test2() -> Option<i32> {
Ok(7) // Should be Some(7)
}
impl Iterator for S {
type Item = i32;
fn next(&mut self) -> Result<i32, i32> { Ok(7) }
}
fn main(){
test();
test2();
}
```
---
#### Single-line playpen errors:
```cmd
<anon>:6:5: 6:6 error: mismatched types: expected `core::option::Option<int>`, found `S` (expected enum core::option::Option, found struct S)
<anon>:6 s
^
<anon>:10:5: 10:10 error: mismatched types: expected `core::option::Option<int>`, found `core::result::Result<_, _>` (expected enum core::option::Option, found enum core::result::Result)
<anon>:10 Ok(7) // Should be Some(7)
^~~~~
<anon>:14:5: 14:55 error: method `next` has an incompatible type for trait: expected enum core::option::Option, found enum core::result::Result [E0053]
<anon>:14 fn next(&mut self) -> Result<uint, uint> { Ok(7) }
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error: aborting due to 3 previous errors
playpen: application terminated with error code 101
```
---
#### Multi-line errors:
```cmd
$ ./rustc test.rs
test.rs:6:5: 6:6 error: mismatched types:
expected `core::option::Option<i32>`,
found `S`
(expected enum `core::option::Option`,
found struct `S`)
test.rs:6 s
^
test.rs:10:5: 10:10 error: mismatched types:
expected `core::option::Option<i32>`,
found `core::result::Result<_, _>`
(expected enum `core::option::Option`,
found enum `core::result::Result`)
test.rs:10 Ok(7) // Should be Some(7)
^~~~~
test.rs:15:5: 15:53 error: method `next` has an incompatible type for trait: expected enum `core::option::Option`, found enum `core::result::Result` [E0053]
test.rs:15 fn next(&mut self) -> Result<i32, i32> { Ok(7) }
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error: aborting due to 3 previous errors
```
---
#### Positive notes
* Vim worked fine with it: https://github.com/rust-lang/rust/pull/19203#issuecomment-66861668
* `make check` didn't find any errors
* Fixed *backtick* placement suggested by @p1start at https://github.com/rust-lang/rust/pull/19203#issuecomment-64062052
#### Negative notes
* Didn't check Emacs support but also wasn't provided a testcase...
* Needs to be tested with macro errors but I don't have a good testcase yet
* I would like to move the `E[0053]` earlier (see https://github.com/rust-lang/rust/issues/19464#issuecomment-65334301) but I don't know how
* It might be better to indent the types slightly like so (but I don't know how):
```cmd
test.rs:6:5: 6:6 error: mismatched types:
expected `core::option::Option<int>`,
found `S`
(expected enum `core::option::Option`,
found struct `S`)
test.rs:6 s
```
* Deep whitespace indentation may be a bad idea because early wrapping will cause misalignment between lines
#### Other
* I thought that compiler flags or something else (environment variables maybe) might be required because of comments against it but now that seems too much of a burden for users and for too little gain.
* There was concern that it will make large quantities of errors difficult to distinguish but I don't find that an issue. They both look awful and multi-line errors makes the types easier to understand.
---
#### Single lined spew:
```cmd
$ rustc test2.rs
test2.rs:161:9: 170:10 error: method `next` has an incompatible type for trait: expected enum core::option::Option, found enum core::result::Result [E0053]
test2.rs:161 fn next(&mut self) -> Result<&'a str, int> {
test2.rs:162 self.curr = self.next;
test2.rs:163
test2.rs:164 if let (Some(open), Some(close)) = Parens::find_parens(self.all, self.next) {
test2.rs:165 self.next = if self.all.char_at(self.next) == '(' { close }
test2.rs:166 else { open }
...
test2.rs:164:21: 164:31 error: mismatched types: expected `core::result::Result<uint, int>`, found `core::option::Option<_>` (expected enum core::result::Result, found enum core::option::Option)
test2.rs:164 if let (Some(open), Some(close)) = Parens::find_parens(self.all, self.next) {
^~~~~~~~~~
test2.rs:164:33: 164:44 error: mismatched types: expected `core::result::Result<uint, int>`, found `core::option::Option<_>` (expected enum core::result::Result, found enum core::option::Option)
test2.rs:164 if let (Some(open), Some(close)) = Parens::find_parens(self.all, self.next) {
^~~~~~~~~~~
test2.rs:169:40: 169:76 error: mismatched types: expected `core::result::Result<&'a str, int>`, found `core::option::Option<&str>` (expected enum core::result::Result, found enum core::option::Option)
test2.rs:169 if self.curr != self.len { Some(self.all[self.curr..self.next]) } else { None }
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test2.rs:169:86: 169:90 error: mismatched types: expected `core::result::Result<&'a str, int>`, found `core::option::Option<_>` (expected enum core::result::Result, found enum core::option::Option)
test2.rs:169 if self.curr != self.len { Some(self.all[self.curr..self.next]) } else { None }
^~~~
test2.rs:205:14: 205:18 error: mismatched types: expected `core::result::Result<uint, int>`, found `core::option::Option<uint>` (expected enum core::result::Result, found enum core::option::Option)
test2.rs:205 (open, close)
^~~~
test2.rs:205:20: 205:25 error: mismatched types: expected `core::result::Result<uint, int>`, found `core::option::Option<uint>` (expected enum core::result::Result, found enum core::option::Option)
test2.rs:205 (open, close)
^~~~~
test2.rs:210:21: 210:31 error: mismatched types: expected `core::result::Result<uint, int>`, found `core::option::Option<_>` (expected enum core::result::Result, found enum core::option::Option)
test2.rs:210 if let (Some(open), _) = Parens::find_parens(self.all, 0) {
^~~~~~~~~~
test2.rs:210:13: 212:28 error: mismatched types: expected `core::option::Option<&'a int>`, found `core::option::Option<&str>` (expected int, found str)
test2.rs:210 if let (Some(open), _) = Parens::find_parens(self.all, 0) {
test2.rs:211 Some(self.all[0..open])
test2.rs:212 } else { None }
test2.rs:299:48: 299:58 error: mismatched types: expected `Box<translate::Entity>`, found `collections::vec::Vec<_>` (expected box, found struct collections::vec::Vec)
test2.rs:299 pub fn new() -> Entity { Entity::Group(Vec::new()) }
^~~~~~~~~~
test2.rs:359:51: 359:58 error: type `&mut Box<translate::Entity>` does not implement any method in scope named `push`
test2.rs:359 Entity::Group(ref mut vec) => vec.push(e),
^~~~~~~
test2.rs:366:51: 366:85 error: type `&mut Box<translate::Entity>` does not implement any method in scope named `push`
test2.rs:366 Entity::Group(ref mut vec) => vec.push(Entity::Inner(s.to_string())),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error: aborting due to 12 previous errors
```
---
#### Multi-line spew:
```cmd
$ ./rustc test2.rs
test2.rs:161:9: 170:10 error: method `next` has an incompatible type for trait:
expected enum `core::option::Option`,
found enum `core::result::Result` [E0053]
test2.rs:161 fn next(&mut self) -> Result<&'a str, int> {
test2.rs:162 self.curr = self.next;
test2.rs:163
test2.rs:164 if let (Some(open), Some(close)) = Parens::find_parens(self.all, self.next) {
test2.rs:165 self.next = if self.all.char_at(self.next) == '(' { close }
test2.rs:166 else { open }
...
test2.rs:164:21: 164:31 error: mismatched types:
expected `core::result::Result<uint, int>`,
found `core::option::Option<_>`
(expected enum `core::result::Result`,
found enum `core::option::Option`)
test2.rs:164 if let (Some(open), Some(close)) = Parens::find_parens(self.all, self.next) {
^~~~~~~~~~
test2.rs:164:33: 164:44 error: mismatched types:
expected `core::result::Result<uint, int>`,
found `core::option::Option<_>`
(expected enum `core::result::Result`,
found enum `core::option::Option`)
test2.rs:164 if let (Some(open), Some(close)) = Parens::find_parens(self.all, self.next) {
^~~~~~~~~~~
test2.rs:169:40: 169:76 error: mismatched types:
expected `core::result::Result<&'a str, int>`,
found `core::option::Option<&str>`
(expected enum `core::result::Result`,
found enum `core::option::Option`)
test2.rs:169 if self.curr != self.len { Some(self.all[self.curr..self.next]) } else { None }
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test2.rs:169:86: 169:90 error: mismatched types:
expected `core::result::Result<&'a str, int>`,
found `core::option::Option<_>`
(expected enum `core::result::Result`,
found enum `core::option::Option`)
test2.rs:169 if self.curr != self.len { Some(self.all[self.curr..self.next]) } else { None }
^~~~
test2.rs:205:14: 205:18 error: mismatched types:
expected `core::result::Result<uint, int>`,
found `core::option::Option<uint>`
(expected enum `core::result::Result`,
found enum `core::option::Option`)
test2.rs:205 (open, close)
^~~~
test2.rs:205:20: 205:25 error: mismatched types:
expected `core::result::Result<uint, int>`,
found `core::option::Option<uint>`
(expected enum `core::result::Result`,
found enum `core::option::Option`)
test2.rs:205 (open, close)
^~~~~
test2.rs:210:21: 210:31 error: mismatched types:
expected `core::result::Result<uint, int>`,
found `core::option::Option<_>`
(expected enum `core::result::Result`,
found enum `core::option::Option`)
test2.rs:210 if let (Some(open), _) = Parens::find_parens(self.all, 0) {
^~~~~~~~~~
test2.rs:210:13: 212:28 error: mismatched types:
expected `core::option::Option<&'a int>`,
found `core::option::Option<&str>`
(expected int,
found str)
test2.rs:210 if let (Some(open), _) = Parens::find_parens(self.all, 0) {
test2.rs:211 Some(self.all[0..open])
test2.rs:212 } else { None }
test2.rs:229:57: 229:96 error: the trait `core::ops::Fn<(char,), bool>` is not implemented for the type `|char| -> bool`
test2.rs:229 .map(|s| s.trim_chars(|c: char| c.is_whitespace()))
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test2.rs:238:46: 239:75 error: type `core::str::CharSplits<'_, |char| -> bool>` does not implement any method in scope named `filter_map`
test2.rs:238 .filter_map(|s| if !s.is_empty() { Some(s.trim_chars('\'')) }
test2.rs:239 else { None })
test2.rs:237:46: 237:91 error: the trait `core::ops::Fn<(char,), bool>` is not implemented for the type `|char| -> bool`
test2.rs:237 let vec: Vec<&str> = value[].split(|c: char| matches!(c, '(' | ')' | ','))
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test2.rs:238:65: 238:77 error: the type of this value must be known in this context
test2.rs:238 .filter_map(|s| if !s.is_empty() { Some(s.trim_chars('\'')) }
^~~~~~~~~~~~
test2.rs:299:48: 299:58 error: mismatched types:
expected `Box<translate::Entity>`,
found `collections::vec::Vec<_>`
(expected box,
found struct `collections::vec::Vec`)
test2.rs:299 pub fn new() -> Entity { Entity::Group(Vec::new()) }
^~~~~~~~~~
test2.rs:321:36: 322:65 error: type `core::str::CharSplits<'_, |char| -> bool>` does not implement any method in scope named `filter_map`
test2.rs:321 .filter_map(|s| if !s.is_empty() { Some(s.trim_chars('\'')) }
test2.rs:322 else { None })
test2.rs:320:36: 320:81 error: the trait `core::ops::Fn<(char,), bool>` is not implemented for the type `|char| -> bool`
test2.rs:320 let vec: Vec<&str> = s.split(|c: char| matches!(c, '(' | ')' | ','))
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test2.rs:321:55: 321:67 error: the type of this value must be known in this context
test2.rs:321 .filter_map(|s| if !s.is_empty() { Some(s.trim_chars('\'')) }
^~~~~~~~~~~~
test2.rs:359:51: 359:58 error: type `&mut Box<translate::Entity>` does not implement any method in scope named `push`
test2.rs:359 Entity::Group(ref mut vec) => vec.push(e),
^~~~~~~
test2.rs:366:51: 366:85 error: type `&mut Box<translate::Entity>` does not implement any method in scope named `push`
test2.rs:366 Entity::Group(ref mut vec) => vec.push(Entity::Inner(s.to_string())),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error: aborting due to 24 previous errors
```
Closes #18946 #19464
cc @P1start @jakub- @tomjakubowski @kballard @chris-morgan
143 lines
3.2 KiB
Rust
143 lines
3.2 KiB
Rust
// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! The Rust compiler.
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//!
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//! # Note
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//!
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//! This API is completely unstable and subject to change.
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#![crate_name = "rustc"]
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#![unstable]
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#![staged_api]
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#![crate_type = "dylib"]
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#![crate_type = "rlib"]
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#![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
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html_favicon_url = "http://www.rust-lang.org/favicon.ico",
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html_root_url = "http://doc.rust-lang.org/nightly/")]
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#![allow(unknown_features)]
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#![feature(quote)]
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#![feature(slicing_syntax, unsafe_destructor)]
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#![feature(box_syntax)]
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#![allow(unknown_features)] #![feature(int_uint)]
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#![feature(rustc_diagnostic_macros)]
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extern crate arena;
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extern crate flate;
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extern crate fmt_macros;
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extern crate getopts;
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extern crate graphviz;
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extern crate libc;
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extern crate regex;
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extern crate rustc_llvm;
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extern crate rustc_back;
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extern crate serialize;
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extern crate rbml;
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extern crate collections;
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#[macro_use] extern crate log;
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#[macro_use] extern crate syntax;
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extern crate "serialize" as rustc_serialize; // used by deriving
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#[cfg(test)]
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extern crate test;
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pub use rustc_llvm as llvm;
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mod diagnostics;
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pub mod back {
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pub use rustc_back::abi;
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pub use rustc_back::archive;
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pub use rustc_back::arm;
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pub use rustc_back::mips;
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pub use rustc_back::mipsel;
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pub use rustc_back::rpath;
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pub use rustc_back::svh;
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pub use rustc_back::target_strs;
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pub use rustc_back::x86;
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pub use rustc_back::x86_64;
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}
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pub mod middle {
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pub mod astconv_util;
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pub mod astencode;
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pub mod cfg;
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pub mod check_const;
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pub mod check_static_recursion;
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pub mod check_loop;
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pub mod check_match;
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pub mod check_rvalues;
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pub mod check_static;
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pub mod const_eval;
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pub mod dataflow;
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pub mod dead;
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pub mod def;
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pub mod dependency_format;
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pub mod effect;
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pub mod entry;
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pub mod expr_use_visitor;
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pub mod fast_reject;
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pub mod graph;
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pub mod intrinsicck;
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pub mod infer;
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pub mod lang_items;
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pub mod liveness;
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pub mod mem_categorization;
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pub mod pat_util;
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pub mod privacy;
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pub mod reachable;
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pub mod region;
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pub mod recursion_limit;
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pub mod resolve_lifetime;
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pub mod stability;
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pub mod subst;
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pub mod traits;
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pub mod ty;
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pub mod ty_fold;
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pub mod ty_walk;
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pub mod weak_lang_items;
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}
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pub mod metadata;
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pub mod session;
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pub mod plugin;
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pub mod lint;
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pub mod util {
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pub use rustc_back::fs;
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pub use rustc_back::sha2;
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pub mod common;
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pub mod ppaux;
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pub mod nodemap;
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pub mod snapshot_vec;
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pub mod lev_distance;
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}
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pub mod lib {
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pub use llvm;
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}
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__build_diagnostic_array! { DIAGNOSTICS }
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// A private module so that macro-expanded idents like
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// `::rustc::lint::Lint` will also work in `rustc` itself.
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//
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// `libstd` uses the same trick.
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#[doc(hidden)]
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mod rustc {
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pub use lint;
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}
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