[mojo] Update the codebase to Mojo v0.26.2 by forfudan · Pull Request #185 · forfudan/decimo

forfudan · 2026-03-21T08:36:15Z

This PR updates the codebase to Mojo v0.26.2. It migrates Decimo's sources, tests, benches, and build tooling to Mojo v0.26.2 while keeping all library APIs and test coverage intact.

Changes:

Replace fn with def throughout (v0.26.2 def/fn unification).
Migrate imports to std.* namespace (e.g., std.testing, std.collections, std.memory, std.python, std.time).
Update string slicing and pointer/SIMD access patterns for v0.26.2 stdlib.
Remove redundant AnyType trait conformances from BigDecimal and BigInt10.
Adjust CLI build pipeline to vendor/build ArgMojo from a pinned git commit.

Stringable/Representable traits removed from 7 structs (BigInt, BigUInt, BigDecimal, Decimal128, BigInt10, DecimoError, RoundingMode) — replaced by Writable with write_to(). as_string_slice() → StringSlice() in 6 locations across str.mojo, bigdecimal.mojo, decimal128.mojo. import math → import std.math in constants.mojo. Explicit Int8() casts in comparison functions across 5 files (13 locations). Explicit Float64() casts in exponential.mojo (4 locations). Explicit UInt32(), UInt64(), UInt128() casts across decimal128/arithmetics.mojo, bigint/arithmetics.mojo, bigint/exponential.mojo. .__str__() on SIMD → str() in 3 files (4 locations).

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Pull request overview

Updates Decimo’s Mojo sources, tests, benches, and build tooling to be compatible with Mojo v0.26.2 (including the stdlib module layout and updated trait/constructor patterns), while keeping the library’s APIs and test coverage broadly intact.

Changes:

Migrate imports to std.* (e.g., std.testing, std.collections, std.memory, std.python, std.time) across src/tests/benches.
Update string slicing, pointer/SIMD access, and copy/move init patterns for Mojo v0.26.2.
Adjust CLI build pipeline to vendor/build ArgMojo from a pinned git commit (Pixi task + CI workflow step).

Reviewed changes

Copilot reviewed 125 out of 127 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tests/toml/test_decimo_toml.mojo	Update testing import to `std.testing`.
tests/decimal128/test_decimal128_utility.mojo	Update testing imports to `std.testing`.
tests/decimal128/test_decimal128_sqrt.mojo	Update testing import to `std.testing`.
tests/decimal128/test_decimal128_round.mojo	Update testing import + byte-slicing syntax for strings.
tests/decimal128/test_decimal128_root_power.mojo	Update testing import to `std.testing`.
tests/decimal128/test_decimal128_quantize.mojo	Move Python interop imports to `std.python`; update testing import.
tests/decimal128/test_decimal128_multiply.mojo	Move Python interop imports to `std.python`; update testing import.
tests/decimal128/test_decimal128_modulo.mojo	Update testing import to `std.testing`.
tests/decimal128/test_decimal128_logarithm.mojo	Update testing import to `std.testing`.
tests/decimal128/test_decimal128_from_string.mojo	Update testing import to `std.testing`.
tests/decimal128/test_decimal128_from_int.mojo	Update testing import to `std.testing`.
tests/decimal128/test_decimal128_from_float.mojo	Update testing import to `std.testing`.
tests/decimal128/test_decimal128_factorial.mojo	Update testing import to `std.testing`.
tests/decimal128/test_decimal128_exp_ln.mojo	Update testing import to `std.testing`.
tests/decimal128/test_decimal128_divide.mojo	Update testing import to `std.testing`.
tests/decimal128/test_decimal128_conversions.mojo	Update testing import to `std.testing`.
tests/decimal128/test_decimal128_comparison.mojo	Update testing import to `std.testing`.
tests/decimal128/test_decimal128_arithmetics.mojo	Move Python interop imports to `std.python`; update testing import.
tests/cli/test_tokenizer.mojo	Update testing import to `std.testing`.
tests/cli/test_parser.mojo	Update testing import to `std.testing`.
tests/cli/test_evaluator.mojo	Update testing import to `std.testing`.
tests/cli/test_error_handling.mojo	Update testing import to `std.testing`.
tests/biguint/test_biguint_exponential.mojo	Move Python/random/testing to `std.*`.
tests/biguint/test_biguint_arithmetics.mojo	Move Python/random/testing to `std.*`.
tests/bigint10/test_bigint10_to_int.mojo	Update testing import to `std.testing`.
tests/bigint10/test_bigint10_creation.mojo	Move Python interop to `std.python`; update testing import.
tests/bigint10/test_bigint10_arithmetics.mojo	Move Python interop to `std.python`; update testing import.
tests/bigint/test_bigint_string_format.mojo	Update testing import to `std.testing`.
tests/bigint/test_bigint_sqrt_divmod.mojo	Update testing import to `std.testing`.
tests/bigint/test_bigint_power_shift.mojo	Update testing import to `std.testing`.
tests/bigint/test_bigint_number_theory.mojo	Update testing import to `std.testing`.
tests/bigint/test_bigint_inplace.mojo	Update testing import to `std.testing`.
tests/bigint/test_bigint_inplace_extended.mojo	Update testing import to `std.testing`.
tests/bigint/test_bigint_conversion.mojo	Update testing import to `std.testing`.
tests/bigint/test_bigint_compare_utility.mojo	Update testing import to `std.testing`.
tests/bigint/test_bigint_bitwise.mojo	Update testing import to `std.testing`.
tests/bigint/test_bigint_basic.mojo	Update testing import to `std.testing`.
tests/bigint/test_bigint_arithmetics.mojo	Move Python interop to `std.python`; update testing import.
tests/bigdecimal/test_bigdecimal_trigonometric.mojo	Move Python/testing to `std.*`; update generic arg syntax.
tests/bigdecimal/test_bigdecimal_rounding.mojo	Move Python/testing to `std.*`.
tests/bigdecimal/test_bigdecimal_methods.mojo	Update testing import to `std.testing`.
tests/bigdecimal/test_bigdecimal_exponential.mojo	Move Python/testing to `std.*`.
tests/bigdecimal/test_bigdecimal_exponential_toml.mojo	Update testing import to `std.testing`.
tests/bigdecimal/test_bigdecimal_creation.mojo	Move Python interop to `std.python`; update testing import.
tests/bigdecimal/test_bigdecimal_compare.mojo	Move Python/testing to `std.*`.
tests/bigdecimal/test_bigdecimal_arithmetics.mojo	Move Python/testing to `std.*`.
src/decimo/toml/tokenizer.mojo	Update source index tracking + byte-slicing formatting changes.
src/decimo/toml/parser.mojo	Move `Dict` import to `std.collections`; adopt new copy-init form; update byte slicing.
src/decimo/tests.mojo	Move imports to `std.*`; update copy/move init patterns; adjust write formatting.
src/decimo/str.mojo	Move `vectorize` import to `std.algorithm`; add `ljust/rjust`; update StringSlice and SIMD pointer usage.
src/decimo/rounding_mode.mojo	Switch from `Stringable` to `Writable` printing via `write_to`.
src/decimo/errors.mojo	Move `cwd` import to `std.pathlib`; adjust formatting to use `decimo.str.ljust`; drop `Stringable`.
src/decimo/decimal128/utility.mojo	Move imports to `std.*`; replace `constrained` with `comptime assert`; update shift types.
src/decimo/decimal128/rounding.mojo	Move testing import to `std.testing`; fix scale type to `UInt32` in constructors.
src/decimo/decimal128/exponential.mojo	Move to `std.math`/`std.time`/`std.testing`; fix scale types to `UInt32`.
src/decimo/decimal128/decimal128.mojo	Move imports to `std.*`; adjust trait usage + printing; update byte slicing and scale typing.
src/decimo/decimal128/comparison.mojo	Move testing import to `std.testing`; ensure `Int8` return types are explicit.
src/decimo/decimal128/arithmetics.mojo	Move imports to `std.*`; normalize scale typing (`UInt32`) and exponent operand typing.
src/decimo/biguint/exponential.mojo	Move imports to `std.*`; update list pointer/SIMD loads.
src/decimo/biguint/biguint.mojo	Move memory import to `std.memory`; adopt `Writable` + `write_repr_to`; update list pointer/SIMD loads and byte slicing.
src/decimo/biguint/arithmetics.mojo	Move imports to `std.*`; update list pointer/SIMD loads/stores.
src/decimo/bigint10/comparison.mojo	Ensure `Int8` return types are explicit.
src/decimo/bigint10/bigint10.mojo	Move imports to `std.*`; switch to `Writable` + `write_repr_to`; update byte slicing.
src/decimo/bigint/exponential.mojo	Move math import to `std.math`; adjust shift operand typing for newer Mojo.
src/decimo/bigint/comparison.mojo	Ensure `Int8` return types are explicit.
src/decimo/bigint/bitwise.mojo	Replace `@parameter` branching with `comptime if` + `comptime assert`.
src/decimo/bigint/bigint.mojo	Move memory imports to `std.memory`; switch to `Writable` + `write_repr_to`; update byte slicing.
src/decimo/bigint/arithmetics.mojo	Move memory imports to `std.memory`; normalize shift typing and `Int8` returns.
src/decimo/bigdecimal/trigonometric.mojo	Move time import to `std.time`.
src/decimo/bigdecimal/exponential.mojo	Move math import to `std.math`; adjust term-count computations via Float64 conversions.
src/decimo/bigdecimal/constants.mojo	Remove unused builtin math import.
src/decimo/bigdecimal/comparison.mojo	Ensure `Int8` return types are explicit.
src/decimo/bigdecimal/bigdecimal.mojo	Move imports to `std.*`; switch to `Writable` output; update StringSlice/byte slicing; add `write_repr_to`.
src/decimo/bigdecimal/arithmetics.mojo	Move math import to `std.math`.
src/cli/main.mojo	Update std sys import; migrate ArgMojo API calls to newer builder style; update byte slicing.
src/cli/calculator/tokenizer.mojo	Update copy/move init patterns; update StringSlice usage.
src/cli/calculator/display.mojo	Move stderr import to `std.sys`.
python/decimo_module.mojo	Move Python bindings/os imports to `std.*`; adjust BigDecimal string conversion.
pixi.toml	Update Mojo version + dependency bounds; add ArgMojo fetch task; adjust CLI build task to package ArgMojo locally.
pixi.lock	Update lockfile for new channels/versions; remove argmojo package pin.
benches/decimal128/bench_truncate_divide.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_subtract.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_sqrt.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_round.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_root.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_quantize.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_power.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_multiply.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_modulo.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_log10.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_ln.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_from_string.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_from_int.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_from_float.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_exp.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_divide.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_comparison.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/decimal128/bench_add.mojo	Move imports to `std.*`; adjust division typing for iterations.
benches/biguint/bench_scale_up_by_power_of_10.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/biguint/bench_biguint_truncate_divide.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/biguint/bench_biguint_subtraction.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/biguint/bench_biguint_sqrt.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/biguint/bench_biguint_multiply.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/biguint/bench_biguint_multiply_complexity.mojo	Move imports to `std.*`; update timing + stdlib collections.
benches/biguint/bench_biguint_from_string.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/biguint/bench_biguint_divide_complexity.mojo	Move imports to `std.*`; update timing + stdlib collections.
benches/biguint/bench_biguint_add.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigint/bench_truncate_divide.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigint/bench_to_string.mojo	Move imports to `std.*`; update iteration division typing.
benches/bigint/bench_sqrt.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigint/bench_shift.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigint/bench_power.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigint/bench_multiply.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigint/bench_from_string.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigint/bench_floor_divide.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigint/bench_add.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigdecimal/bench_bigdecimal_subtract.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigdecimal/bench_bigdecimal_sqrt.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigdecimal/bench_bigdecimal_round.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigdecimal/bench_bigdecimal_root.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigdecimal/bench_bigdecimal_multiply.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigdecimal/bench_bigdecimal_ln.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigdecimal/bench_bigdecimal_exp.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigdecimal/bench_bigdecimal_divide.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
benches/bigdecimal/bench_bigdecimal_add.mojo	Move imports to `std.*`; update byte slicing and iteration division typing.
.gitignore	Ignore `temp/` used by ArgMojo vendoring workflow.
.github/workflows/run_tests.yaml	Add CI step to fetch ArgMojo before building CLI.

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src/decimo/decimal128/utility.mojo

pixi.toml

This PR updates the codebase to Mojo v0.26.2. It migrates Decimo's sources, tests, benches, and build tooling to Mojo v0.26.2 while keeping all library APIs and test coverage intact. **Changes:** - Replace `fn` with `def` throughout (v0.26.2 `def`/`fn` unification). - Migrate imports to `std.*` namespace (e.g., `std.testing`, `std.collections`, `std.memory`, `std.python`, `std.time`). - Update string slicing and pointer/SIMD access patterns for v0.26.2 stdlib. - Remove redundant `AnyType` trait conformances from `BigDecimal` and `BigInt10`. - Adjust CLI build pipeline to vendor/build ArgMojo from a pinned git commit.

forfudan added 4 commits March 21, 2026 00:11

Continue solving warnings

0eafce2

Update CLI with downloading argmojo from the repo

6c03dad

Remove __str__ and __repr__

1335b55

forfudan requested a review from Copilot March 21, 2026 08:36

Copilot started reviewing on behalf of forfudan March 21, 2026 08:37 View session

Copilot AI reviewed Mar 21, 2026

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forfudan added 3 commits March 21, 2026 11:25

fn -> def

dc1cd92

Update

f0bad03

Update

5074392

forfudan merged commit 52b6076 into cli Mar 21, 2026
9 checks passed

forfudan deleted the mojo branch March 21, 2026 13:44

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[mojo] Update the codebase to Mojo v0.26.2#185

[mojo] Update the codebase to Mojo v0.26.2#185
forfudan merged 7 commits intoclifrom
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forfudan commented Mar 21, 2026 •

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forfudan commented Mar 21, 2026 •

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