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.

2026-02-13 16:40:33 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: 2026-02-13 16:57:55 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