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authorNanoTech2016-12-06 21:55:47 -0600
committerNanoTech2017-03-10 23:48:28 -0600
commite8da1dd3007a392e9594eca72177265f356cabeb (patch)
treee8f038960cb8b4da4f69f67465a7560f1d71e62a /src
parent3d9dfaeadf85c31295b2b14ac25bd66ddc774177 (diff)
Colored error messages
Diffstat (limited to '')
-rw-r--r--src/main.rs47
1 files changed, 38 insertions, 9 deletions
diff --git a/src/main.rs b/src/main.rs
index 0abcea8..deb6ac3 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,6 +2,7 @@ extern crate bytecount;
extern crate lalrpop_util;
#[macro_use]
extern crate nom;
+extern crate term_painter;
mod core;
pub use core::*;
@@ -16,18 +17,46 @@ fn print_error(message: &str, source: &str, start: usize, end: usize) {
let line_number = bytecount::count(source[..start].as_bytes(), '\n' as u8);
let line_start = source[..start].rfind('\n').map(|i| i + 1).unwrap_or(0);
let line_end = source[end..].find('\n').unwrap_or(0) + end;
- let context = &source[line_start..line_end];
+ let context_prefix = &source[line_start..start];
+ let context_highlighted = &source[start..end];
+ let context_suffix = &source[end..line_end];
- println!("error: {}", message);
- println!(" --> (stdin):{}:0", line_number);
let line_number_str = line_number.to_string();
let line_number_width = line_number_str.len();
- println!("{:w$} |", "", w = line_number_width);
- println!("{} | {}", line_number_str, context);
- println!("{:w$} | {:so$}{:^>ew$}", "", "", "",
- w = line_number_width,
- so = source[line_start..start].chars().count(),
- ew = ::std::cmp::max(1, source[start..end].chars().count()));
+
+ use term_painter::ToStyle;
+ let err_style = term_painter::Color::Red;
+ let bold = term_painter::Attr::Bold;
+
+ bold.with(|| {
+ err_style.with(|| {
+ print!("error: ");
+ });
+ println!("{}", message);
+ });
+ bold.with(|| {
+ print!(" -->");
+ });
+ println!(" {}:{}:0", "(stdin)", line_number);
+ bold.with(|| {
+ println!("{:w$} |", "", w = line_number_width);
+ print!("{} |", line_number_str);
+ });
+ print!(" {}", context_prefix);
+ bold.with(|| {
+ err_style.with(|| {
+ print!("{}", context_highlighted);
+ });
+ });
+ println!("{}", context_suffix);
+ bold.with(|| {
+ print!("{:w$} |", "", w = line_number_width);
+ err_style.with(|| {
+ println!(" {:so$}{:^>ew$}", "", "",
+ so = source[line_start..start].chars().count(),
+ ew = ::std::cmp::max(1, source[start..end].chars().count()));
+ });
+ });
}
fn main() {