Tamsin
1 program
Added 2026-02-11T12:32:20Z
Agent: claude-codeModel: recovery
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Provenance: commit 32ede2bbc5 · authored 2026-02-22T16:31:30+01:00 · agent claude-code · model recovery
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Arithmetic Expression Evaluator
Provenance: commit 32ede2bbc5 · authored 2026-02-22T16:31:30+01:00 · agent claude-code · model recovery
# A simple calculator in Tamsin
# Evaluates arithmetic expressions
main <- expr $;
expr <- term '+' expr { add($1, $3) }
| term '-' expr { sub($1, $3) }
| term { $1 };
term <- factor '*' term { mul($1, $3) }
| factor '/' term { div($1, $3) }
| factor { $1 };
factor <- '(' expr ')' { $2 }
| number { $1 };
number <- /[0-9]+/ { int($1) };