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Formulas: test the order walk and map visit nodes; date ROADMAP like the parity doc

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Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
This commit is contained in:
Harrison Booth
2026-10-19 20:56:26 -05:00
co-authored by Claude Sonnet 5.5
parent 4ce8dc55ec
commit 199e5f8e05
2 changed files with 20 additions and 3 deletions
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ROADMAP.md
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@@ -2,7 +2,7 @@
**Stage: alpha** · next: beta, ~25 points of "ready for real work" and ~160–240 h away
> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-14 · **Change:** minor (long flat operator chains up to Excel's formula limit) · **Target:** Microsoft Excel (Microsoft 365)
> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-19 · **Change:** minor (long flat operator chains up to Excel's formula limit) · **Target:** Microsoft Excel (Microsoft 365)
GridCraft aims at full Microsoft Excel parity, and at being better in places: faster, open (XLSX
is the native format), fully scriptable by agents (MCP, control channel, CLI), and on the web.
@@ -132,7 +132,7 @@ Ranked; estimates in Opus 5.5 agent-hours. Detail and the full beta-gate list in
| Date | What landed |
|---|---|
| 2026-10-14 | Long flat operator chains (`=A1+A2+…`) up to Excel's 8,192-character limit (4,096 operands): entering, filling, inserting rows, undo, Evaluate Formula and XLSX save no longer overflow the stack; chains past 64 operands are saved as plain formulas, not dynamic arrays; Spanish formula entry accepts chains past 256 operands (#916) |
| 2026-10-19 | Long flat operator chains (`=A1+A2+…`) up to Excel's 8,192-character limit (4,096 operands): entering, filling, inserting rows, undo, Evaluate Formula and XLSX save no longer overflow the stack; chains past 64 operands are saved as plain formulas, not dynamic arrays; Spanish formula entry accepts chains past 256 operands (#916) |
| 2026-10-12 | Rows auto-fit oversized fonts: opening a file and whole-row/column formatting grow non-custom rows to their tallest font (#833) |
| 2026-10-12 | Number formats: parsing a format code is linear in its length (long runs of `[`, `,` or `/` no longer take quadratic time), and an unclosed `[` is a literal when splitting sections as well as when tokenizing (#810) |
| 2026-10-12 | Number formats: a fraction denominator with 65,536 zeros no longer crashes; format codes are capped at 255 characters like Excel (longer codes display as General, `TEXT` gives `#VALUE!`) (#807) |
@@ -194,7 +194,7 @@ Ranked; estimates in Opus 5.5 agent-hours. Detail and the full beta-gate list in
| Date | Change | Summary |
|---|---|---|
| 2026-10-14 | minor | Progress log: long flat operator chains (#916) |
| 2026-10-19 | minor | Progress log: long flat operator chains (#916) |
| 2026-10-12 | minor | Rows auto-fit oversized fonts on open and whole-row/column formatting (#833); progress log row |
| 2026-10-12 | minor | Progress log: multi-area row/column delete (#758) |
| 2026-10-12 | trivial | Progress log: XLSX chart sheets kept on save (#727) |
crates/formula/src/tests.rs
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@@ -453,3 +453,20 @@ fn spanish_input_counts_left_operand_of_a_chain_at_the_same_depth() {
let chain = Expr::Binary(BinOp::Add, Box::new(wrap(deepest)), Box::new(Expr::Number(1.0)));
assert!(es(&chain).is_ok());
}
#[test]
fn walk_is_preorder_and_map_is_postorder_left_to_right() {
// `(A1+B1)+SUM(C1,D1)-E1`: a chain with a call on its right. walk visits parents before
// children, map rewrites children (left to right) before their parent.
let e = parse("(A1+B1)+SUM(C1,D1)-E1").unwrap();
let mut walked = Vec::new();
e.walk(&mut |n| walked.push(print(n)));
assert_eq!(walked, ["(A1+B1)+SUM(C1,D1)-E1", "(A1+B1)+SUM(C1,D1)", "(A1+B1)", "A1+B1", "A1", "B1", "SUM(C1,D1)", "C1", "D1", "E1"]);
let mut mapped = Vec::new();
let out = e.map(&mut |n| {
mapped.push(print(&n));
n
});
assert_eq!(mapped, ["A1", "B1", "A1+B1", "(A1+B1)", "C1", "D1", "SUM(C1,D1)", "(A1+B1)+SUM(C1,D1)", "E1", "(A1+B1)+SUM(C1,D1)-E1"]);
assert_eq!(print(&out), "(A1+B1)+SUM(C1,D1)-E1");
}