.clang-tidy

---
# Small, curated allowlist -- deliberately not "checks=*" (see issue #172).
# bugprone/clang-analyzer/performance catch real bugs; the readability
# entries below are the handful that survived triage against this tree
# without mass-NOLINT-ing intentional patterns (arena/pool allocation,
# the tree-walking visitor's recursion, etc).
#
# clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling is
# dropped: it fires on every memcpy/memset call recommending C11 Annex K
# (memcpy_s/memset_s), which glibc doesn't implement and this codebase
# doesn't use anywhere -- pure noise, not a real finding.
#
# bugprone-easily-swappable-parameters is dropped: purely stylistic (would
# want renaming, not a code fix), and fires on dozens of ordinary
# two-int-parameter functions throughout this codebase with no correctness
# signal behind it.
#
# bugprone-narrowing-conversions is dropped: the interpreter's typed-value
# arithmetic deliberately narrows a C-promoted `int`/`double`/`long double`
# result back down to the operand's declared width (short/float/char/etc.)
# via a typed pointer store, at every single binop x type combination in
# ast.c's evaluator -- dozens of identical-shape, intentional instances, not
# individually actionable findings.
#
# performance-no-int-to-ptr is dropped: pointer values flow through this
# interpreter as uintptr_t (the tagged-value representation's pointer
# boxing, see STDROT_PTR / pointer_level throughout ast.c, interpreter.c,
# stdrot.c) and get cast back to void*/typed pointers at every dispatch
# boundary -- again a pervasive, deliberate pattern, not individually
# actionable findings.
Checks: >
  -*,
  bugprone-*,
  -bugprone-easily-swappable-parameters,
  -bugprone-narrowing-conversions,
  clang-analyzer-*,
  -clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling,
  performance-*,
  -performance-no-int-to-ptr,
  readability-else-after-return,
  readability-redundant-declaration,
  readability-non-const-parameter
WarningsAsErrors: '*'
HeaderFilterRegex: '^\./(lib|stdrot)/.*\.h$'
FormatStyle: none