Skip to content

Patternia v0.7.1 Release Note

Release Date: February 7, 2026
Version: 0.7.1

Overview

Patternia v0.7.1 is a diagnostics-focused patch release. This version improves compile-time error readability and adds direct fix hints for common misuse cases. No runtime behavior or matching semantics changed.

Highlights

Clearer Static-Assert Requirements

  • Replaced generic requirement names such as ok with semantic names (for example can_add_after_wildcard, alt_index_in_range, pattern_has_bind_method).
  • Compiler diagnostics now expose more meaningful failed requirements.

Actionable Error Hints

  • Added concise Tip: guidance to key diagnostics in pipeline validation.
  • Improved guidance for wildcard placement, incomplete matches, and subject category requirements.

Variant Type Diagnostics

  • Improved is<T>() not-found diagnostics with clearer wording and concrete recovery guidance.
  • Added explicit guidance for duplicate variant alternatives: prefer alt<I>() or distinct wrapper types.

Compatibility Notes

  • Source compatibility: unchanged.
  • API surface: unchanged.
  • Behavior: unchanged (diagnostic wording only).

Implementation Notes

  • include/ptn/core/common/diagnostics.hpp
  • Requirement names made semantic.
  • Several static-assert messages now include fix-oriented hints.
  • include/ptn/pattern/type.hpp
  • is<T>() alternative lookup diagnostics refined.