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Phase 4 cont. go-eval-for handles all three for-header shapes:
for { ... } — infinite (cond defaults to true)
for cond { ... } — while-like (init=nil, post=nil)
for init ; cond ; post { ... } — C-style
Implementation:
* Run INIT (if any), extending env.
* Loop: eval COND. If false, exit with current env.
Eval body (a :block). Catch sentinels:
:return-value → propagate up
:break → exit loop with pre-break env
:continue → still runs POST, then re-loops
Otherwise: run POST, re-loop.
:break and :continue propagate as keyword sentinels through
go-eval-block alongside the existing :return-value sentinel. The
block returns whichever sentinel hit first; control-flow constructs
(for, switch, select) catch them.
inc-dec (x++ / x--) updates env via the same shadowing model used by
assign — `(go-env-extend env name (+ current 1))`.
**Iterative fact(5) = 120 and the classic sum-to-9 = 45 both
evaluate.** Demonstrates the for-loop machinery is solid enough for
real programs.
eval 40/40, total 417/417.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
15 lines
488 B
JSON
15 lines
488 B
JSON
{
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"language": "go",
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"total_pass": 417,
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"total": 417,
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"suites": [
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{"name":"lex","pass":129,"total":129,"status":"ok"},
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{"name":"parse","pass":176,"total":176,"status":"ok"},
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{"name":"types","pass":72,"total":72,"status":"ok"},
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{"name":"eval","pass":40,"total":40,"status":"ok"},
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{"name":"runtime","pass":0,"total":0,"status":"pending"},
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{"name":"stdlib","pass":0,"total":0,"status":"pending"},
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{"name":"e2e","pass":0,"total":0,"status":"pending"}
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]
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}
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