Merge origin/main into gc-options-iteration-fields

# Conflicts:
#	ROADMAP.md
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Harrison Booth
2026-10-24 15:12:26 -05:00
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# Function parity: worksheet functions and formulas
> **Last reviewed:** 2026-10-15 · **Last updated:** 2026-10-21 · **Change:** minor (SUBTOTAL and AGGREGATE cap the cells they visit, #2175) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
> **Last reviewed:** 2026-10-15 · **Last updated:** 2026-10-23 · **Change:** minor (number text with accounting parentheses coerces like Excel 365; INDEX with one index on a 2-D reference is #REF! as in Excel; earlier: SUBTOTAL and AGGREGATE cap the cells they visit, #2175) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
Excel's worksheet functions, category by category, against GridCraft's function library. Part of
[target-app-parity.md](target-app-parity.md); gaps feed [gaps.md](gaps.md).
@@ -85,6 +85,7 @@ This improves series preparation; it does not change the model-fitting or season
| SUBTOTAL / AGGREGATE input size | references trim to the used range; all areas, arrays and values of one call are charged against the 16-million-cell limit before any cell is read (skipped hidden, nested and error cells count), and `#NUM!` past it (#2175) |
| Implicit intersection `@`, legacy CSE array formulas | done; legacy array range fill (PR #156) |
| Implicit intersection `@`, legacy CSE array formulas | done, the entered range filled (PR #156) |
| Array lifting: an array in a scalar argument evaluates the function per element | done. The Analysis ToolPak functions (EOMONTH, EDATE, WORKDAY(.INTL), NETWORKDAYS(.INTL), YEARFRAC, WEEKNUM, the COUP*, PRICE*, YIELD*, ODD*, TBILL*, ACCRINT*, AMOR*, DISC, DURATION, CUMIPMT/CUMPRINC, EFFECT, NOMINAL, DOLLARDE/FR, XNPV/XIRR rate and guess, FVSCHEDULE principal, ISEVEN/ISODD, QUOTIENT, MROUND, FACTDOUBLE, SQRTPI, RANDBETWEEN, SERIESSUM, the base conversions, CONVERT, DELTA, GESTEP, ERF/ERFC, BESSEL*, COMPLEX and IM* except IMSUM/IMPRODUCT) give `#VALUE!` for a reference to more than one cell in a value argument, as Excel 365 does in both dynamic-array and legacy formulas; array constants and computed arrays (`A1:A3+0`) still lift, and range arguments (holidays, schedule, cash flows) and the .INTL weekend accept ranges. Difference: BYROW/BYCOL pass their row or column to the LAMBDA as values, so `BYROW(A1:B3,LAMBDA(r,EOMONTH(r,0)))` lifts where Excel gives `#VALUE!` |
| Trim references `A1:.E10` (trailing), `A1.:E10` (leading), `A1.:.E10` (both), also on whole rows/columns (`A:.A`) | done; evaluated as `TRIMRANGE(range, code, code)`, adjusted on insert/delete; files store `_xlfn.TRIMRANGE(range,code,code)` (Excel's own file spelling unconfirmed in public docs), `_xlfn._TRO_ALL/_TRO_LEADING/_TRO_TRAILING(...)` read too |
| LET, LAMBDA, named LAMBDAs, ISOMITTED, MAP/REDUCE/SCAN/BYROW/BYCOL/MAKEARRAY | done |
| Iterative calculation for circular references | done: with Enable Iterative Calculation on (`formulas.calculationOptions` `{iterative, maxIterations, maxChange}`, saved as `<calcPr iterate iterateCount iterateDelta>`), loops are evaluated again from their previous values (blank = 0) until no cell on a loop changes by Maximum Change or Maximum Iterations is reached; off, cycles give `#CIRC!`. Set in File › Options › Formulas (Enable iterative calculation, Maximum Iterations 1 to 32767, Maximum Change 0 or more; the two fields are disabled while iteration is off). Differences: GridCraft recalculates on open, so a loop that never settles (`=A1+1`) advances again each time the file is opened
@@ -122,6 +123,8 @@ workbooks; results checked in as data, not Excel files) and fixing what it finds
| Date | Change | Summary |
|---|---|---|
| 2026-10-23 | minor | Number text coercion (VALUE, arithmetic, typed entry): a dollar sign before accounting parentheses (`$(1,234)`, `$ (5)`) and a percent sign after them (`(5)%`) read as negatives; `(-5)`, `((5))`, `($-5)`, `$5%`, `$(5)%` and dates or times in parentheses are `#VALUE!`, as observed in Excel 365 |
| 2026-10-23 | minor | INDEX with only a row index on a reference of several rows and columns (`INDEX(A1:C3,2)`, `INDEX(A1:C3,0)`) is `#REF!`, as observed in Excel, so it also fails as a range endpoint and inside other functions; an empty column argument (`INDEX(A1:C3,2,)`) still gives the row. Checked that a column array with one index stays a 1×1 array (`TYPE` 64), which is what Excel returns |
| 2026-10-21 | minor | SUBTOTAL and AGGREGATE charge every argument against the evaluator's 16-million-cell limit before scanning; a value in XFD1048576 no longer makes `SUBTOTAL(9,A:XFD)` read the whole sheet (#2175) |
| 2026-10-19 | minor | LET and LAMBDA names compare case-insensitively in any script, as in Excel: `=LET(dług,100,DŁUG*2)` is 200 (was #NAME?); also LET-bound lambdas called or passed by name (`żar(2)`, `MAP(…,Λ)`), `ISOMITTED`, and formula-bar alias translation (one shared `gridcraft_formula::same_name`, which matches `ß` with `ẞ` and keeps dotless `ı` apart from `i`) |
| 2026-10-19 | minor | Long flat operator chains (#916): 4,096 operands (Excel's 8,192-character limit) no longer overflow the stack when entered, filled, adjusted or saved; chains past 64 operands are no longer saved as dynamic-array formulas; Spanish entry no longer refuses chains past 256 operands |
@@ -130,6 +133,8 @@ workbooks; results checked in as data, not Excel files) and fixing what it finds
| 2026-10-15 | minor | Iterative calculation: Maximum Iterations and Maximum Change are set in File › Options › Formulas (dropped "no Options dialog yet") |
| 2026-10-15 | minor | MEDIAN and AGGREGATE median use an overflow-safe midpoint (#1579); regressions cover finite extremes, tiny values and dependent recalculation |
| 2026-10-15 | minor | ADDRESS quotes a sheet name the way Excel does: names that read as an A1 cell (`A1`) or an R1C1 reference (`R1C1`, `RC`) and names starting with `.` get quotes; `TRUE` / `FALSE` stay bare (#1458) |
| 2026-10-14 | minor | MATCH, XMATCH, VLOOKUP, HLOOKUP, XLOOKUP and LOOKUP compare numbers exactly in every match and search mode, as Excel 365 does: `MATCH(0.1+0.2,{0.3},0)` is `#N/A` and 0.3 sorts below 0.30000000000000004 in approximate and binary search. `=`, SWITCH and the criteria functions (COUNTIF(S), SUMIF(S), AVERAGEIF(S), MAXIFS…) keep comparing at 15 significant digits, also as observed |
| 2026-10-14 | minor | Analysis ToolPak value arguments (EOMONTH, WORKDAY, YEARFRAC, COUPDAYS, DISC, BIN2DEC, IM* and the rest, observed in Excel 365) give `#VALUE!` for a multi-cell reference instead of lifting it |
| 2026-10-13 | minor | Clear reports changed stored cells sparsely, including those beyond the first million coordinates; dependent formulas and removed spills update, while clearing empty merges still unblocks spills (#1032) |
| 2026-10-14 | minor | Bounded references up to 1,048,576 cells (`D3:AZ400`) keep their full shape instead of stopping at the used range, so `SUMPRODUCT(D3:AZ400*B3:B400,(A3:A400=x)*(D1:AZ1=y))` broadcasts like Excel and `ROWS`, `COUNTBLANK` and `--(r="")` count the blanks; references that run to the edge of the sheet (`A:A`) still stop at the used range (#1010) |
| 2026-10-12 | minor | USDOLLAR added as a Compatibility function (not on Microsoft's list, so the counts don't change); MIRR with no positive flow is -1, COUNTIF's bare `"<="` / `">="` skip empty strings, INDIRECT with `a1` = FALSE gives `#REF!` for A1-style text (#738) |