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Tier D: cover math.fmod, math.ult and string.reverse edges

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Assessment

Difficulty
3/5
Estimated time
Half a day
Newbie friendliness
70/100
Issue type
Feature
Clarity
Clearly specified
Activity status
Active
Tech stack
lua
Domain
testing

Research direction

Start by reading an existing Tier D program in corpus/D/ for the expected format, then check how tools/grade.sh --tier D compares output against reference Lua 5.4.9. Write corpus/D/math_fmod_ult_reverse.lua covering the listed math.fmod, math.ult and string.reverse edges, using pcall for the error cases. Done when that program MATCHes under tools/grade.sh --tier D --only math_fmod_ult_reverse or each divergence is classified in LEDGER.md, and bash tests/run.sh passes.

Written by the indexing model from the issue text.

Description

front-end good first issue

math.fmod, math.ult and string.reverse each appear in only one Tier D program. Add corpus/D/math_fmod_ult_reverse.lua covering their edges against reference Lua 5.4.9.

Suggested edges:

  • math.fmod with negative operands, a zero divisor (integer and float), and mixed integer/float arguments;
  • math.ult across the sign boundary;
  • string.reverse of empty and multibyte strings.

Use pcall and print the error for the cases that should raise. Divergences caused by EigenScript gaps (64-bit integers, inf/nan) go in LEDGER.md, not around the program.

Done when

  • The program exists and MATCHes under tools/grade.sh --tier D --only math_fmod_ult_reverse, or every divergence is classified in LEDGER.md.
  • bash tests/run.sh passes.
Dominant language
Lua
Stars
0
Forks
0
Avg merge
54m
Merged PRs (30d)
19

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