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flow: branch combinator (conditional) + 6 tests
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Phase 2 control flow. (branch pred then else) selects then/else node by running
pred on the threaded input; named 'branch' since 'cond' is a Scheme special form.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
giles
2026-06-06 16:32:37 +00:00
parent 91ffba9975
commit 65cbdb8387
6 changed files with 77 additions and 11 deletions
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lib/flow/scoreboard.md
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@@ -1,6 +1,6 @@
# flow-on-sx Scoreboard
**All tests pass: 18 / 18 across 1 suite.**
**All tests pass: 24 / 24 across 2 suites.**
`bash lib/flow/conformance.sh`
@@ -9,6 +9,7 @@
| Suite | Passing | Covers |
|-------|--------:|--------|
| basic | 18 | Phase 1: single nodes, linear sequence, data-flow threading, defflow, parallel fan/join, nested composition, publish-shaped flow |
| control | 6 | Phase 2: `branch` conditional — true/false select, threaded predicate, full-node branches, nested 3-way, approval gate |
## Architecture
@@ -34,8 +35,7 @@ capture the flow continuation directly.
## Phases
- [~] Phase 1 — Declarative DAG + sequential execution (combinators + 18 tests done;
`flow/start` done)
- [ ] Phase 2 — Control flow + error handling
- [x] Phase 1 — Declarative DAG + sequential execution (combinators + 18 tests, `flow/start`)
- [~] Phase 2 — Control flow + error handling (`branch` done)
- [ ] Phase 3 — Suspend / resume (the showcase)
- [ ] Phase 4 — Distributed nodes via fed-sx