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Address review comments
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@fmease
fmease committed Nov 10, 2024
1 parent 1d78004 commit acf6344
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Showing 3 changed files with 45 additions and 42 deletions.
51 changes: 25 additions & 26 deletions compiler/rustc_errors/src/emitter.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,7 @@ use rustc_error_messages::{FluentArgs, SpanLabel};
use rustc_lint_defs::pluralize;
use rustc_span::hygiene::{ExpnKind, MacroKind};
use rustc_span::source_map::SourceMap;
use rustc_span::{FileLines, FileName, SourceFile, Span, char_width};
use rustc_span::{FileLines, FileName, SourceFile, Span, char_width, str_width};
use termcolor::{Buffer, BufferWriter, Color, ColorChoice, ColorSpec, StandardStream, WriteColor};
use tracing::{debug, instrument, trace, warn};

Expand Down Expand Up @@ -113,8 +113,12 @@ impl Margin {
fn was_cut_right(&self, line_len: usize) -> bool {
let right =
if self.computed_right == self.span_right || self.computed_right == self.label_right {
// FIXME: This comment refers to the only callsite of this method.
// Rephrase it or refactor it, so it can stand on its own.
// Account for the "..." padding given above. Otherwise we end up with code lines
// that do fit but end in "..." as if they were trimmed.
// FIXME: Don't hard-code this offset. Is this meant to represent
// `2 * str_width(self.margin())`?
self.computed_right - 6
} else {
self.computed_right
Expand Down Expand Up @@ -673,6 +677,7 @@ impl HumanEmitter {
// Create the source line we will highlight.
let left = margin.left(line_len);
let right = margin.right(line_len);
// FIXME: The following code looks fishy. See #132860.
// On long lines, we strip the source line, accounting for unicode.
let mut taken = 0;
let code: String = source_string
Expand All @@ -695,7 +700,7 @@ impl HumanEmitter {
buffer.puts(line_offset, code_offset, placeholder, Style::LineNumber);
}
if margin.was_cut_right(line_len) {
let padding: usize = placeholder.chars().map(|ch| char_width(ch)).sum();
let padding = str_width(placeholder);
// We have stripped some code after the rightmost span end, make it clear we did so.
buffer.puts(line_offset, code_offset + taken - padding, placeholder, Style::LineNumber);
}
Expand Down Expand Up @@ -744,6 +749,7 @@ impl HumanEmitter {
// Left trim
let left = margin.left(source_string.len());

// FIXME: This looks fishy. See #132860.
// Account for unicode characters of width !=0 that were removed.
let left = source_string.chars().take(left).map(|ch| char_width(ch)).sum();

Expand Down Expand Up @@ -1068,21 +1074,15 @@ impl HumanEmitter {

if pos > 1 && (annotation.has_label() || annotation.takes_space()) {
for p in line_offset + 1..=line_offset + pos {
if let AnnotationType::MultilineLine(_) = annotation.annotation_type {
buffer.putc(
p,
(code_offset + annotation.start_col.display).saturating_sub(left),
underline.multiline_vertical,
underline.style,
);
} else {
buffer.putc(
p,
(code_offset + annotation.start_col.display).saturating_sub(left),
underline.vertical_text_line,
underline.style,
);
}
buffer.putc(
p,
(code_offset + annotation.start_col.display).saturating_sub(left),
match annotation.annotation_type {
AnnotationType::MultilineLine(_) => underline.multiline_vertical,
_ => underline.vertical_text_line,
},
underline.style,
);
}
if let AnnotationType::MultilineStart(_) = annotation.annotation_type {
buffer.putc(
Expand Down Expand Up @@ -2134,7 +2134,7 @@ impl HumanEmitter {
}

let placeholder = self.margin();
let padding: usize = placeholder.chars().map(|ch| char_width(ch)).sum();
let padding = str_width(placeholder);
buffer.puts(
row_num,
max_line_num_len.saturating_sub(padding),
Expand Down Expand Up @@ -2224,11 +2224,11 @@ impl HumanEmitter {
};
// ...or trailing spaces. Account for substitutions containing unicode
// characters.
let sub_len: usize =
if is_whitespace_addition { &part.snippet } else { part.snippet.trim() }
.chars()
.map(|ch| char_width(ch))
.sum();
let sub_len: usize = str_width(if is_whitespace_addition {
&part.snippet
} else {
part.snippet.trim()
});

let offset: isize = offsets
.iter()
Expand Down Expand Up @@ -2266,8 +2266,7 @@ impl HumanEmitter {
}

// length of the code after substitution
let full_sub_len =
part.snippet.chars().map(|ch| char_width(ch)).sum::<usize>() as isize;
let full_sub_len = str_width(&part.snippet) as isize;

// length of the code to be substituted
let snippet_len = span_end_pos as isize - span_start_pos as isize;
Expand All @@ -2282,7 +2281,7 @@ impl HumanEmitter {
// if we elided some lines, add an ellipsis
if lines.next().is_some() {
let placeholder = self.margin();
let padding: usize = placeholder.chars().map(|ch| char_width(ch)).sum();
let padding = str_width(placeholder);
buffer.puts(
row_num,
max_line_num_len.saturating_sub(padding),
Expand Down
32 changes: 16 additions & 16 deletions compiler/rustc_session/src/config.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1772,8 +1772,8 @@ pub fn parse_error_format(
color,
));
early_dcx.early_fatal(format!(
"argument for `--error-format` must be `human`, `json` or \
`short` (instead was `{arg}`)"
"argument for `--error-format` must be `human`, `human-annotate-rs`, \
`human-unicode`, `json`, `pretty-json` or `short` (instead was `{arg}`)"
))
}
}
Expand Down Expand Up @@ -1826,21 +1826,21 @@ pub fn parse_crate_edition(early_dcx: &EarlyDiagCtxt, matches: &getopts::Matches
fn check_error_format_stability(
early_dcx: &EarlyDiagCtxt,
unstable_opts: &UnstableOptions,
error_format: ErrorOutputType,
format: ErrorOutputType,
) {
if !unstable_opts.unstable_options {
if let ErrorOutputType::Json { pretty: true, .. } = error_format {
early_dcx.early_fatal("`--error-format=pretty-json` is unstable");
}
if let ErrorOutputType::HumanReadable(HumanReadableErrorType::AnnotateSnippet, _) =
error_format
{
early_dcx.early_fatal("`--error-format=human-annotate-rs` is unstable");
}
if let ErrorOutputType::HumanReadable(HumanReadableErrorType::Unicode, _) = error_format {
early_dcx.early_fatal("`--error-format=human-unicode` is unstable");
}
}
if unstable_opts.unstable_options {
return;
}
let format = match format {
ErrorOutputType::Json { pretty: true, .. } => "pretty-json",
ErrorOutputType::HumanReadable(format, _) => match format {
HumanReadableErrorType::AnnotateSnippet => "human-annotate-rs",
HumanReadableErrorType::Unicode => "human-unicode",
_ => return,
},
_ => return,
};
early_dcx.early_fatal(format!("`--error-format={format}` is unstable"))
}

fn parse_output_types(
Expand Down
4 changes: 4 additions & 0 deletions compiler/rustc_span/src/lib.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -2223,6 +2223,10 @@ pub fn char_width(ch: char) -> usize {
}
}

pub fn str_width(s: &str) -> usize {
s.chars().map(char_width).sum()
}

/// Normalizes the source code and records the normalizations.
fn normalize_src(src: &mut String) -> Vec<NormalizedPos> {
let mut normalized_pos = vec![];
Expand Down

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