feat(lean): RLE pattern parser for Conway Life (Epic #1647 Phase 2)#1996
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Adds Conway/Life/RLE.lean: a total parser for the standard Run Length Encoded pattern format used by LifeWiki / conwaylife.com. - parseRLE : String -> Except String Grid (handles comments, header, whitespace, run counts, b/o/$/!). - 4 flagship pattern constants with their RLE strings and parsed grids: glider, lwss, pulsar, gosper_gun (the 1970 Bill Gosper glider gun, 36 cells, period 30, first known infinite-growth pattern). - #eval sanity checks cross-verify lwss_parsed == lwss and pulsar_parsed == pulsar against the hand-written constants. - No sorry, no theorem (the parser is a pure computation; behavioural correctness is exercised via #eval isSpaceship / isOscillator). Verified locally: lake build Conway.Life.RLE SUCCESS, lake build Conway SUCCESS (3332 jobs), no warnings. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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…1996) Adds Conway/Life/RLE.lean: a total parser for the standard Run Length Encoded pattern format used by LifeWiki / conwaylife.com. - parseRLE : String -> Except String Grid (handles comments, header, whitespace, run counts, b/o/$/!). - 4 flagship pattern constants with their RLE strings and parsed grids: glider, lwss, pulsar, gosper_gun (the 1970 Bill Gosper glider gun, 36 cells, period 30, first known infinite-growth pattern). - #eval sanity checks cross-verify lwss_parsed == lwss and pulsar_parsed == pulsar against the hand-written constants. - No sorry, no theorem (the parser is a pure computation; behavioural correctness is exercised via #eval isSpaceship / isOscillator). Verified locally: lake build Conway.Life.RLE SUCCESS, lake build Conway SUCCESS (3332 jobs), no warnings. Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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Summary
Phase 2 of Conway Game-of-Life Epic #1647: RLE (Run Length Encoded) pattern parser.
New module
Conway.Life.RLEParser features
parseRLE : String → Except String Grid— handles comments (#...), header (x = W, y = H), digit run counts, payload charsb/o/$/!parseRLE!— total wrapper returning[]on errorsortDeduplTrimavoidsString.trimdeprecationNamed patterns (RLE + parsed grids)
glider_RLE/glider_parsedConway.Life.gliderlwss_RLE/lwss_parsed== Conway.Life.Spaceships.lwsspulsar_RLE/pulsar_parsed== Conway.Life.Oscillators.pulsargosper_gun_RLE/gosper_gunVerification (lean-merge-discipline HARD gate)
No theorems (parser is pure computation; correctness via
#eval).Follows #1975 (Spaceships + Oscillators, merged). Companion to #1989 (MacroCell + Hashlife).
Co-Authored-By: Claude Opus 4.8 noreply@anthropic.com