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Re: [PATCH] Fix constexpr evaluation of comparisons involving pointer-to-members

From: Jason Merrill <jason at redhat dot com>
To: Patrick Palka <patrick at parcs dot ath dot cx>, gcc-patches at gcc dot gnu dot org
Date: Tue, 2 Feb 2016 19:51:14 +0100
Subject: Re: [PATCH] Fix constexpr evaluation of comparisons involving pointer-to-members
Authentication-results: sourceware.org; auth=none
References: <1450739227-18825-1-git-send-email-patrick at parcs dot ath dot cx>

On 12/22/2015 12:07 AM, Patrick Palka wrote:

+  if (code == EQ_EXPR || code == NE_EXPR)
+    {
+      if (TREE_CODE (lhs) == PTRMEM_CST && CONSTANT_CLASS_P (rhs))
+	lhs = cplus_expand_constant (lhs);
+      if (TREE_CODE (rhs) == PTRMEM_CST && CONSTANT_CLASS_P (lhs))
+	rhs = cplus_expand_constant (rhs);
+    }

If both sides are PTRMEM_CST, we should be able to compare them withoutexpanding, using cp_tree_equal.


Jason

Follow-Ups:
- Re: [PATCH] Fix constexpr evaluation of comparisons involving pointer-to-members
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