Repository navigation

Printf fixes around handling of -0.0 (negative zero) - #18147

Merged

T-Gro merged 19 commits into

dotnet:mainfrom

jwosty:printf-fixes

Aug 25, 2026

Merged

Printf fixes around handling of -0.0 (negative zero)#18147
T-Gro merged 19 commits into
dotnet:mainfrom
jwosty:printf-fixes

Commits on Aug 20, 2026
- Add failing test case demonstrating sprintf negative zero bug #15557
  jwosty
  committed
  e0f308d
- Fix negative zero behavior with printf "+" flag
  jwosty
  committed
  543dd71
- Add printf tests for infinity and nan
  jwosty
  committed
  9e916f9
- Refactor
  jwosty
  committed
  f3daa8f
- Fix printf sign handling for -0 decimal and work around a .NET bug
  jwosty
  committed
  1781deb
- Work around another corner case consequence of .NET negative decimal formatting bug
  jwosty
  committed
  f1df555
- Add test cases
  jwosty
  committed
  d38630b
- Add release notes
  jwosty
  committed
  9cf4569
- Correct wrong issue link
  jwosty
  committed
  016dda4
- Change test case expected outputs in light of reviews
  jwosty
  committed
  d84c7db
- Comment out some test cases for now, and add some others
  jwosty
  committed
  131d7cd
- Fix sign handling to not be a breaking change with respect to sprintf behavior on .NET Framework
  jwosty
  committed
  306bcae
- Adjust printf test expectations to match runtime behavior (net framework on net framework, net core on net core), and reimplement the logic
  jwosty
  committed
  9385d8d
- Eliminate isPositive closures and remove dead code
  jwosty
  committed
  f797dac
- Fix migrated printf/printf-interpolated tests (and others) not actually running due to partial application
  jwosty
  committed
  6aa6840
- Eliminate type test branching by using strIsNegative for all number types, not just single/double/decimal
  jwosty
  committed
  0651f1f
- Add some more corner case tests
  jwosty
  committed
  18589d6
Commits on Aug 21, 2026
- Enable running of all printf tests by default instead of randomized subset
  jwosty
  committed
  2a05123
- Add doc comment explaining new isPositive approach
  jwosty
  committed
  d0efb00

Sunbelt Computer Software

PL/B Language Development and Support

Navigation Menu

Repository navigation

Printf fixes around handling of -0.0 (negative zero) - #18147

Printf fixes around handling of -0.0 (negative zero)#18147
T-Gro merged 19 commits into
dotnet:mainfrom
jwosty:printf-fixes

Commits on Aug 20, 2026

Add failing test case demonstrating sprintf negative zero bug #15557

Fix negative zero behavior with printf "+" flag

Add printf tests for infinity and nan

Refactor

Fix printf sign handling for -0 decimal and work around a .NET bug

Work around another corner case consequence of .NET negative decimal formatting bug

Add test cases

Add release notes

Correct wrong issue link

Change test case expected outputs in light of reviews

Comment out some test cases for now, and add some others

Fix sign handling to not be a breaking change with respect to sprintf behavior on .NET Framework

Adjust printf test expectations to match runtime behavior (net framework on net framework, net core on net core), and reimplement the logic

Eliminate isPositive closures and remove dead code

Fix migrated printf/printf-interpolated tests (and others) not actually running due to partial application

Eliminate type test branching by using strIsNegative for all number types, not just single/double/decimal

Add some more corner case tests

Commits on Aug 21, 2026

Enable running of all printf tests by default instead of randomized subset

Add doc comment explaining new isPositive approach