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Powers and remainders in the calculator (closes #3 )

internal/calc gets its own tokenizer and precedence-climbing parser in
place of go/parser, which cannot express a power operator; go/constant
still computes. ^ (also **) binds tighter than * / % and a sign on its
left, and groups to the right. % takes the sign of the divisor and is
exact on decimals. A whole exponent is computed exactly while the
result's numerator and denominator stay within 4096 bits; otherwise,
and for a fractional exponent, in float64. A remainder, or the sign of
a negative base's power, that depends on a value go/constant holds
rounded is refused as too large. The welcome text and the replies
mention the new operators; a negative base with a fractional exponent
gets its own reply.

Model: opus-5-5

2026-09-29 00:08:26 +00:00

1.7 KiB

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Workflow

branch (from main)
do the work in Next Step
move Next Step to the top of Completed Steps
move the top item of Future Steps into Next Step
commit (docs/TODO.md changes in the same commit as the work)
merge to main if the branch is not protected, otherwise open a PR
push

Status

pre-1.0. No git tags exist. main is a working bot: one container image holding the bot and the SimpleX Chat command-line client v7.0.2, a bot profile named calc with a long-term address that accepts every contact request, and exact arithmetic replies (+ - * /, parentheses, decimals). The Gitea issue tracker is the authoritative list of work; this file mirrors it.

Next Step

Adopt the canonical .golangci.yml from the prompts repository once it replaces gomodguard with gomodguard_v2. golangci-lint v2.12.2 warns on every run that gomodguard is deprecated. The file is maintained upstream and is not edited here; done when make lint runs with no deprecation warning.

Completed Steps

2026-09-28 Powers (^, also written **) and remainders (%) in internal/calc, which now reads expressions with a parser of its own in place of go/parser
2026-09-28 Moved the command tree and the run and version commands from cmd/simplexcalc/ into internal/cli; cmd/simplexcalc/main.go is now a single call to cli.Main
2026-09-26 Seeded from go-template-repo (renamed, its HTTP service removed) and built the bot: internal/calc for the arithmetic, internal/simplex for the chat client process and its WebSocket API, internal/bot for address setup and replies, and a runtime image on Ubuntu 22.04 carrying the checksum-verified simplex-chat binary

Future Steps

none

1.7 KiB Raw Blame History