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Auto merge of #30728 - athaeryn:mention-warning-lint-group, r=Manishearth

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Fixes #30203.

This is my first time writing Rust, and I think this code could be a bit better. Any suggestions?
This commit is contained in:
bors 2016-01-07 08:24:36 +00:00
commit 2edb1d9b96
1 changed files with 9 additions and 5 deletions
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14
src/librustc_driver/lib.rs
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@ -70,6 +70,7 @@ use rustc_metadata::loader;
use rustc_metadata::cstore::CStore;
use rustc::util::common::time;
use std::cmp::max;
use std::cmp::Ordering::Equal;
use std::env;
use std::io::{self, Read, Write};
@ -627,11 +628,13 @@ Available lint options:
let max_name_len = plugin_groups.iter()
.chain(&builtin_groups)
.map(|&(s, _)| s.chars().count())
.max()
.unwrap_or(0);
let max_name_len = max("warnings".len(),
plugin_groups.iter()
.chain(&builtin_groups)
.map(|&(s, _)| s.chars().count())
.max()
.unwrap_or(0));
let padded = |x: &str| {
let mut s = repeat(" ")
.take(max_name_len - x.chars().count())
@ -643,6 +646,7 @@ Available lint options:
println!("Lint groups provided by rustc:\n");
println!(" {} {}", padded("name"), "sub-lints");
println!(" {} {}", padded("----"), "---------");
println!(" {} {}", padded("warnings"), "all built-in lints");
let print_lint_groups = |lints: Vec<(&'static str, Vec<lint::LintId>)>| {
for (name, to) in lints {