catch3/src/catch2/internal/catch_textflow.cpp, branch feature/property-combinators Progmasoft Catch3: an independently maintained C++17 test framework with a parallel runner, property checks, snapshots and structured results. Better handling of ANSI escape codes in TextFlow 2026-09-13T21:35:34+00:00 Martin Hořeňovský 2026-09-13T21:35:10+00:00 8e2f6f7a876e127a08b1864d028199d6e0961fc6 The new implementation keeps track of found escape codes in a separate vector, which has two advantages: 1) The handling of inputs without any escape codes is much faster. As this will be the case for majority of inputs, this should provide nice speedup all around. 2) We no longer mangle unrelated 0xFFs in the user-provided input. Closes #3199 
The new implementation keeps track of found escape codes in a separate
vector, which has two advantages:
1) The handling of inputs without any escape codes is much faster. As
   this will be the case for majority of inputs, this should provide
   nice speedup all around.
2) We no longer mangle unrelated 0xFFs in the user-provided input.

Closes #3199
Avoid a potential underflow when iterating over invalid inputs 2026-05-14T08:58:09+00:00 Dirk Müller 2026-05-07T07:39:12+00:00 69e0473f6e98d47c93518424c08ee69ee632c0f0 The forward iteration logic already bounds-check for m_it != m_string->end(), do the same for the backward iteration. The issue with the assert is that the assert() might not be compiled in, and it is happening after the dereference, so it was too late. 
The forward iteration logic already bounds-check for m_it != m_string->end(),
do the same for the backward iteration. The issue with the assert is
that the assert() might not be compiled in, and it is happening after
the dereference, so it was too late.
Fix counting of UTF-8 codepoints in TextFlow 2026-04-01T14:12:08+00:00 Jan Niklas Hasse 2026-03-28T15:02:01+00:00 572f96b8febec9dd14ac5284e6a959a7246325c8 For line-wrapping bytes were counted instead of codepoints. This resulted in line-breaks being inserted at the wrong position and also breaking UTF-8 characters. Fixes #1022. 
For line-wrapping bytes were counted instead of codepoints. This
resulted in line-breaks being inserted at the wrong position and also
breaking UTF-8 characters.

Fixes #1022.
Handle ANSI escape sequences when performing column wrapping (#2849) 2024-05-04T21:43:52+00:00 Jeremy Rifkin 2024-05-04T21:43:52+00:00 8ce2426e53b2596a9823b4a314f72f1c3b30be82 This PR adds functionality to skip around ANSI escape sequences in catch_textflow so they do not contribute to line length and line wrapping code does not split escape sequences in the middle. I've implemented this by creating a AnsiSkippingString abstraction that has a bidirectional iterator that can skip around escape sequences while iterating. Additionally I refactored Column::const_iterator to be iterator-based rather than index-based so this abstraction is a simple drop-in for std::string. Currently only color sequences are handled, other escape sequences are left unaffected. Motivation: Text with ANSI color sequences gets messed up when being output by Catch2 #2833. 
This PR adds functionality to skip around ANSI escape sequences in catch_textflow so they do not contribute to line length and line wrapping code does not split escape sequences in the middle. I've implemented this by creating a AnsiSkippingString abstraction that has a bidirectional iterator that can skip around escape sequences while iterating. Additionally I refactored Column::const_iterator to be iterator-based rather than index-based so this abstraction is a simple drop-in for std::string.

Currently only color sequences are handled, other escape sequences are left unaffected.

Motivation: Text with ANSI color sequences gets messed up when being output by Catch2 #2833.
 Move-enable various parts of TextFlow 2023-12-27T20:43:49+00:00 Martin Hořeňovský 2023-12-27T20:43:40+00:00 b52d97855d794175e69abc6f0eceee9ec3c1bd0e This removes about 200 pointless copies from printing the help message (the original motivation for the change), and also nicely improves performance of the various reporters that depend on TextFlow. 
This removes about 200 pointless copies from printing the help
message (the original motivation for the change), and also nicely
improves performance of the various reporters that depend on
TextFlow.
Fix references to license file 2022-10-28T09:30:15+00:00 Lars Toenning 2022-10-28T09:22:53+00:00 f1084fb30990fe40c8f5b70034970c7eb4e1da72 The license file was renamed with 6a502cc2f5fedd59b3495b58708f0d6d987ed9e1 
The license file was renamed with 6a502cc2f5fedd59b3495b58708f0d6d987ed9e1
Fix quadratic runtime when linebreaking strings without newlines 2021-11-03T23:23:56+00:00 Martin Hořeňovský 2021-11-03T23:22:50+00:00 912df7df354fd6c814b5d7c45ac44f494a5fb5fe The problem was that every line would iterate from current line start position to the end of the string, looking for a newline to break on, leading to accidentally quadratic runtime. With this change, the code only ever searches up to the current line's length and not more. Credit to @jorgenpt for the fix suggestion. Closes #2315 
The problem was that every line would iterate from current line
start position to the end of the string, looking for a newline
to break on, leading to accidentally quadratic runtime. With this
change, the code only ever searches up to the current line's
length and not more.

Credit to @jorgenpt for the fix suggestion.

Closes #2315
Improve comments and names in TextFlow::Column 2021-11-01T18:14:37+00:00 Martin Hořeňovský 2021-11-01T18:14:37+00:00 70c4ec78fbbfadb19d520c72b83f33cd0915c078 






Typedef Column::iterator as Column::const_iterator not vice versa
2021-10-31T12:01:41+00:00

Martin Hořeňovský

2021-10-31T12:01:41+00:00

455ae0c561b6254e05c5fe619b08968187d28a70












Add standardized copyright notice + SPDX identifier to source files
2020-08-30T13:43:45+00:00

Martin Hořeňovský

2020-08-30T13:43:45+00:00

90aeffb97d6942d16f75a56b11e10fc0b010995a

This should also be done for test files, but that has lower priority.





This should also be done for test files, but that has lower priority.