Subject: Template and generic-programming issues

A class or function template's instantiation set, default arguments, or constraints change in a way visible (or invisible) at the binary or header level -- including a shipped binary missing an instantiation the header still declares.

14 case(s). ← back to all subjects

Cases

Case	Title	Verdict	Category
case17_template_abi	Template Instantiation ABI Change	🔴 BREAKING	Breaking
case79_missing_template_instantiation	Missing Template Instantiation in Shipped Binary	🔴 BREAKING	Breaking
case85_internal_template_signature_changed	Internal Template Signature Changed	🔴 BREAKING	Breaking
case87_default_template_arg_changed	Default Template Argument Changed	🔴 BREAKING	Breaking
case105_concept_tightening	Concept Tightening (C++20)	🟠 API_BREAK	API Break
case111_enumerable_thread_specific_lambda_ambiguity	enumerable_thread_specific Lambda-Init Ambiguity	🟡 COMPATIBLE_WITH_RISK	Risk
case122_template_signature_uninstantiated	Uninstantiated Template Signature Change	🟠 API_BREAK	API Break
case223_header_only_template_default_changed	Header-Only Template Default Changed	🟠 API_BREAK	API Break
case224_header_only_template_default_added	Header-Only Template Default Added	✅ NO_CHANGE	No Change
case225_header_only_template_default_removed	Header-Only Template Default Removed	🟠 API_BREAK	API Break
case226_header_only_template_default_unchanged	Header-Only Template Default Unchanged	✅ NO_CHANGE	No Change
case227_nested_namespace_template_default_changed	Nested-Namespace Template Default Changed	🟠 API_BREAK	API Break
case228_nontype_template_param_default_changed	Non-Type Template Parameter Default Changed	🟠 API_BREAK	API Break
case229_exported_template_default_changed	Exported Template Default Changed	🔴 BREAKING	Breaking