* Numfmt: one built-in format table, no dead render arms, fewer allocations (#817)
S1: the built-in format table lives only in gridcraft-xlsx (file formats do not
depend on numfmt); numfmt's unused copy and its exports are removed, xlsx gets
tests pinning its lookup rules.
S3: drop the render_number arm that printed what the fallback prints; literal
text is appended to the output instead of built as a String per call.
O3: render_number keeps pieces, text-before and literal replacements in one
buffer (Parts), fill_int writes digits left to right, Section stores the date
flags (sub-second digits, calendar, AM/PM) computed at parse time, render_date
writes into one buffer.
O4: significant_digits formats into a stack buffer; format_general_fit re-rounds
the 15 digits per width into reused strings.
An equality test compares format_value, TEXT() and format_general_fit with
digests recorded from the previous implementation.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
* xlsx test: builtin ids 42 and 44 are written as custom formats like 5-8
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
* numfmt: push_str for short month/day names (clippy)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Co-authored-by: Claude Sonnet 5.5 <noreply@anthropic.com>
The exponent sign goes right before the exponent digits, after any literal that follows
the E; ? pads exponent digits with spaces; % and commas never scale a scientific section;
zero shows 0 in every integer placeholder. Checked against the 248 TEXT() rows of Apache
POI's NumberFormatApproxTests.xlsx, copied as data into a test.
Valentin KleinandClaude Sonnet 5.5
Dylan M. Taylor
Marco Arnulfo