use curly brace construction of tuples

[grisumbras]

Fix #1140.

[cppalliance-bot]

An automated preview of the documentation is available at https://1144.json.prtest2.cppalliance.org/libs/json/doc/html/index.html

If more commits are pushed to the pull request, the docs will rebuild at the same URL.

2026-02-18 15:49:32 UTC

[cppalliance-bot]

GCOVR code coverage report https://1144.json.prtest2.cppalliance.org/gcovr/index.html
LCOV code coverage report https://1144.json.prtest2.cppalliance.org/genhtml/index.html
Coverage Diff Report https://1144.json.prtest2.cppalliance.org/diff-report/index.html

Build time: 2026-02-18 16:11:27 UTC

[cppalliance-bot]

Benchmark test results. More info at https://benchmark.cppalliance.org/jsonbenchmarks-pullrequests/1144/pullrequest.html

[cppalliance-bot]

Benchmark test results. More info at https://benchmark.cppalliance.org/jsonbenchmarks-pullrequests/1144/pullrequest.html

[cppalliance-bot]

Benchmark test results. More info at https://benchmark.cppalliance.org/jsonbenchmarks-pullrequests/1144/pullrequest.html

[cppalliance-bot]

Benchmark test results. More info at https://benchmark.cppalliance.org/jsonbenchmarks-pullrequests/1144/pullrequest.html

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.67%. Comparing base (6238e35) to head (4df9a86).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1144   +/-   ##
========================================
  Coverage    93.67%   93.67%           
========================================
  Files           91       91           
  Lines         9153     9154    +1     
========================================
+ Hits          8574     8575    +1     
  Misses         579      579           

Files with missing lines	Coverage Δ
include/boost/json/detail/value_to.hpp	100.00% <100.00%> (ø)

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[cppalliance-bot]

Benchmark test results. More info at https://benchmark.cppalliance.org/jsonbenchmarks-pullrequests/1144/pullrequest.html