================
@@ -86,3 +86,71 @@ constexpr int another_test(int val) { // both-note
{{declared here}}
}
static_assert(another_test(1) == 100, ""); // both-error {{static assertion
failed}} \
// both-note {{evaluates to}}
+
+namespace gnurange {
+constexpr int l(int n) {
+ return n + 1;
+}
+constexpr int h(int n) {
+ return 2 * n + 1;
+}
+constexpr int f(int x) {
+ const int n = 2;
+ constexpr struct {
+ char lo {'a'};
+ char hi {'z'};
+ } s;
+
+ switch (x) {
+ case l(n) ... h(n):
+ return 1;
+ case -1 ... 1:
+ return 2;
+ case 9 ... 14:
+ return 3;
+ case 15:
+ return 4;
+ case 16 ... 20:
+ return 5;
+ case s.lo ... s.hi:
+ return 6;
+ default:
+ return -1;
+ }
+}
+static_assert(f(0) == 2);
+static_assert(f(2) == -1);
+static_assert(f(3) == 1);
+static_assert(f(4) == 1);
+static_assert(f(5) == 1);
+static_assert(f(6) == -1);
+static_assert(f(14) == 3);
+static_assert(f(15) == 4);
+static_assert(f(16) == 5);
+static_assert(f(20) == 5);
+static_assert(f('d') == 6);
+
+template <int Lo, int Hi>
+constexpr bool g(int x) {
+ switch (x) {
+ case Lo ... Hi:
+ break;
+ default:
+ return false;
+ }
+ return true;
+}
+static_assert(g<100, 200>(132));
+
+constexpr bool j(int x) { // both-note {{declared here}}
+ switch (x) {
+ case bad(x) ... 100: // both-error {{case value is not a constant
expression}} \
----------------
tbaederr wrote:
Also a test where low > high
https://github.com/llvm/llvm-project/pull/168418
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