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Merged
merged 4 commits into from
Dec 9, 2020
Merged

Not wrap strings at escape backslash #4524

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5a371a0
Issue #4471 - not wrap strings at backslash
davidBar-On Nov 13, 2020
bb8a8b9
Merge branch 'master' into issue-4471
davidBar-On Dec 8, 2020
e8eb088
Changes according to comments to the fix PR #4524
davidBar-On Dec 8, 2020
c6e1673
Some more modifications to improve the code per comments received
davidBar-On Dec 9, 2020
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18 changes: 18 additions & 0 deletions src/formatting/string.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -226,6 +226,24 @@ fn not_whitespace_except_line_feed(g: &str) -> bool {
/// FIXME(issue#3281): We must follow UAX#14 algorithm instead of this.
fn break_string(max_width: usize, trim_end: bool, line_end: &str, input: &[&str]) -> SnippetState {
let break_at = |index /* grapheme at index is included */| {
// Ensure break is not after an escape '\' as it will "escape" the `\` that is added
// for concatenating the two parts of the broken line.
let index = if input[index] != "\\" {
index
} else {
let index_offset = match input[0..index]
.iter()
.rposition(|grapheme| grapheme.ne(&"\\"))
{
// There is a non-`\` to the left
Some(non_backslash_index) => (index - non_backslash_index) % 2,
// Only `\` to the left
None => index % 2,
};
// Make sure break is after even number (including zero) of `\`
index - index_offset
};

// Take in any whitespaces to the left/right of `input[index]` while
// preserving line feeds
let index_minus_ws = input[0..=index]
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9 changes: 9 additions & 0 deletions tests/source/string-lit.rs
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Expand Up @@ -59,3 +59,12 @@ fn issue_1282() {
// #1987
#[link_args = "-s NO_FILESYSTEM=1 -s NO_EXIT_RUNTIME=1 -s EXPORTED_RUNTIME_METHODS=[\"_malloc\"] -s NO_DYNAMIC_EXECUTION=1 -s ELIMINATE_DUPLICATE_FUNCTIONS=1 -s EVAL_CTORS=1"]
extern "C" {}

// #4471 - strings including `\` shaouldnot wrap at the `\`
const ASCII_ESCAPE: &str = "id\u{1f}1\u{1f}/Users/nixon/dev/rs/gitstatusd\u{1f}1c9be4fe5460a30e70de9cbf99c3ec7064296b28\u{1f}master\u{1f}\u{1f}\u{1f}\u{1f}\u{1f}7\u{1f}0\u{1f}1\u{1f}0\u{1f}1\u{1f}0\u{1f}0\u{1f}0\u{1f}\u{1f}0\u{1f}0\u{1f}0\u{1f}\u{1f}\u{1f}0\u{1f}0\u{1f}0\u{1f}0";
const ASCII_ESCAPE: &str = "id\u{1f}1\u{1f}/Users/nixon/dev/rs/gitstatusd\u{1f}1c9be4fe5460a30e70de9cbf99c3ec7064296b28\u{1f}master\u{1f}\u{1f}\u{1f}\u{1f}\u{1f}7\u{1f}0";
const ASCII_ESCAPE: &str = "id\u{1f}1\u{1f}/Users/nixon/dev/rs/gitstatusd\u{1f}1c9be4fe5460a30e70de9cbf99c3ec70642,96b28\u{1f}master\u{1f}\u{1f}\u{1f}\u{1f}\u{1f}7\u{1f}0";
const ASCII_ESCAPE: &str = "id\u{1f}1\u{1f}/Users/nixon/dev/rs/gitstatusd\u{1f}1c9be4fe5460a30e70de9cbf99c3ec70642 96b28\u{1f}master\u{1f}\u{1f}\u{1f}\u{1f}\u{1f}7\u{1f}0";
const ASCII_ESCAPE: &str = "\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\";
const ASCII: &str = "xxxxxxxxxxxxxxxxxxxxxxxxxx\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\";
const ASCII: &str = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx\\\nyyyyyyyyyyyy";
23 changes: 23 additions & 0 deletions tests/target/string-lit.rs
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Expand Up @@ -61,3 +61,26 @@ fn issue_1282() {
#[link_args = "-s NO_FILESYSTEM=1 -s NO_EXIT_RUNTIME=1 -s EXPORTED_RUNTIME_METHODS=[\"_malloc\"] \
-s NO_DYNAMIC_EXECUTION=1 -s ELIMINATE_DUPLICATE_FUNCTIONS=1 -s EVAL_CTORS=1"]
extern "C" {}

// #4471 - strings including `\` shaouldnot wrap at the `\`
const ASCII_ESCAPE: &str =
"id\u{1f}1\u{1f}/Users/nixon/dev/rs/gitstatusd\u{1f}1c9be4fe5460a30e70de9cbf99c3ec7064296b28\
\u{1f}master\u{1f}\u{1f}\u{1f}\u{1f}\u{1f}7\u{1f}0\u{1f}1\u{1f}0\u{1f}1\u{1f}0\u{1f}0\u{1f}0\
\u{1f}\u{1f}0\u{1f}0\u{1f}0\u{1f}\u{1f}\u{1f}0\u{1f}0\u{1f}0\u{1f}0";
const ASCII_ESCAPE: &str = "id\u{1f}1\u{1f}/Users/nixon/dev/rs/gitstatusd\
\u{1f}1c9be4fe5460a30e70de9cbf99c3ec7064296b28\u{1f}master\u{1f}\
\u{1f}\u{1f}\u{1f}\u{1f}7\u{1f}0";
const ASCII_ESCAPE: &str = "id\u{1f}1\u{1f}/Users/nixon/dev/rs/gitstatusd\
\u{1f}1c9be4fe5460a30e70de9cbf99c3ec70642,96b28\u{1f}master\u{1f}\
\u{1f}\u{1f}\u{1f}\u{1f}7\u{1f}0";
const ASCII_ESCAPE: &str = "id\u{1f}1\u{1f}/Users/nixon/dev/rs/gitstatusd\
\u{1f}1c9be4fe5460a30e70de9cbf99c3ec70642 \
96b28\u{1f}master\u{1f}\u{1f}\u{1f}\u{1f}\u{1f}7\u{1f}0";
const ASCII_ESCAPE: &str = "\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
\\";
const ASCII: &str = "xxxxxxxxxxxxxxxxxxxxxxxxxx\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\";
const ASCII: &str =
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx\\\
\nyyyyyyyyyyyy";