Slides for 4xxx.

[libguestfs-talks.git] / 2020-frama-c / 4890-range-init-spec-2.html

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+<h1>New empty_range and total_range predicates</h1>
+
+<pre class="code">
+  /*@ // before:
+    predicate empty_range(struct Range range) =
+      range.lob == range.upb + 1;
+  */
+</pre>
+
+<pre class="code">
+  /*@ // after:
+    predicate empty_range(struct Range range) =
+      range.lob > 0 && range.lob == range.upb + 1;
+
+    predicate total_range(struct Range range) =
+      range.lob == 0 && range.upb == UINT64_MAX;
+  */
+</pre>