On Thu, Feb 12, 2026 at 08:47:37PM +0900, Jason Merrill wrote:
> > + else if (EXPR_P (t))
> > + inform (loc, "but %qE is an expression", t);
> > + else if (VAR_P (t))
> > + inform (loc, "but %qE is a variable", t);
> > + else if (TREE_CODE (t) == PARM_DECL)
> > + inform (loc, "but %qE is a parameter", t);
> > + else if (TREE_CODE (t) == FUNCTION_DECL)
> > + inform (loc, "but %qE is a function", t);
> > + else if (TREE_CODE (t) == FIELD_DECL)
> > + inform (loc, "but %qE is a data member", t);
> > + else if (DECL_FUNCTION_TEMPLATE_P (t))
> > + inform (loc, "but %qE is a function template", t);
> > + else if (DECL_CLASS_TEMPLATE_P (t))
> > + inform (loc, "but %qE is a class template", t);
> > + else if (TREE_CODE (t) == NAMESPACE_DECL)
> > + inform (loc, "but %qE is a namespace", t);
> > + else if (TREE_CODE (t) == CONST_DECL && !DECL_TEMPLATE_PARM_P (t))
> > + inform (loc, "but %qE is an enumerator", t);
> > + else if (DECL_DECOMPOSITION_P (t) && !DECL_DECOMP_IS_BASE (t))
> > + inform (loc, "but %qE is a structured binding", t);
The DECL_DECOMPOSITION_P case needs to come before VAR_P, because
#define DECL_DECOMPOSITION_P(NODE) \
(VAR_P (NODE) && DECL_LANG_SPECIFIC (NODE) \
? DECL_LANG_SPECIFIC (NODE)->u.base.selector == lds_decomp \
: false)
and so the VAR_P case will otherwise make the DECL_DECOMPOSITION_P code
dead.
Jakub
