The Surprising Complexity of Formatting Ranges in Cpp
summary
Argument: adding range and tuple support to std::format and {fmt} exposes many concrete edge cases not solved by restating the topic. The work shows a C++23 range-formatter standardized, a retargeted_format_context pattern to do alignment into temporary buffers, a defect fix to take forwarding references so generators and filter views format, defaults (square brackets, quoted+escaped strings), and unresolved choices like tuple element delimiters and delimiter specifiers. Implementations and compiler‑explorer proofs exist and the core features compile and run.
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chapters (7)
- 0:00Start
- 13:47Dynamic Parsing in (fmt)
- 16:42A formatter for optional
- 21:22A format-spec for Ranges
- 23:34Implementing formatter for Ranges
- 37:35Adding top-level specifiers: delimiter
- 46:59P2286: Formatting Ranges
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