Add Chapter 2: Error Handling#1
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This was referenced Apr 13, 2026
Maps Python's try/except/None to Rust's Result<T,E>, Option<T>, and the ? operator. Covers custom error types, Option chaining, iterator collect into Result, and the LBYL/EAFP/types comparison. 16 passing example tests, 5 exercises with todo!() stubs. Also fixes ch01 Logger exercise: replaced todo!() in Drop impl with a comment-only stub to avoid double-panic abort in the test runner. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Previously hardcoded --exclude ch01-exercises. As more chapters land, each adds its own $chapter-exercises crate with todo!() stubs. Instead of appending --exclude flags per chapter, discover them from cargo metadata by the -exercises suffix. Exercise crates are still compiled by the clippy step, so broken stubs (syntax errors, wrong signatures) still fail CI — only the todo!() panics are tolerated. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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…onflict) WHAT: merge origin/main (ch02 via PR #1 + CI exercise-gating via PR #7) into this branch; conflict was only in [workspace] members — kept the ch03/ch04 entries this branch adds. WHY: PR #8 was CONFLICTING; this makes it mergeable. Verified locally with CI-parity checks: tests (excl. exercise crates), clippy -D warnings, fmt --check — all green. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Summary
try/except/Noneto Rust'sResult<T,E>,Option<T>, and?operatormap,unwrap_or), iterator collect intoResult, and the LBYL/EAFP/types comparisontodo!()stubstodo!()inDropimpl with comment stub to avoid double-panic abortTest plan
cargo test -p ch02-error-handling— 16/16 passcargo test -p ch01-ownership— 7/7 pass (no regression)cargo clippy --workspace -- -D warnings— cleancargo fmt --all -- --check— cleantodo!()panics (expected)🤖 Generated with Claude Code