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Add duplicate checking for switch on types

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* Add compile error tests
This commit is contained in:
antlilja
2020-06-22 12:14:52 +02:00
committed by Andrew Kelley
parent 78c6d39cd4
commit 0de35af98b
2 changed files with 65 additions and 1 deletions
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34
test/compile_errors.zig
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@@ -4362,6 +4362,40 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
"tmp.zig:5:14: note: previous value is here",
});
cases.add("switch expression - duplicate type",
\\fn foo(comptime T: type, x: T) u8 {
\\ return switch (T) {
\\ u32 => 0,
\\ u64 => 1,
\\ u32 => 2,
\\ else => 3,
\\ };
\\}
\\export fn entry() usize { return @sizeOf(@TypeOf(foo(u32, 0))); }
, &[_][]const u8{
"tmp.zig:5:9: error: duplicate switch value",
"tmp.zig:3:9: note: previous value is here",
});
cases.add("switch expression - duplicate type (struct alias)",
\\const Test = struct {
\\ bar: i32,
\\};
\\const Test2 = Test;
\\fn foo(comptime T: type, x: T) u8 {
\\ return switch (T) {
\\ Test => 0,
\\ u64 => 1,
\\ Test2 => 2,
\\ else => 3,
\\ };
\\}
\\export fn entry() usize { return @sizeOf(@TypeOf(foo(u32, 0))); }
, &[_][]const u8{
"tmp.zig:9:9: error: duplicate switch value",
"tmp.zig:7:9: note: previous value is here",
});
cases.add("switch expression - switch on pointer type with no else",
\\fn foo(x: *u8) void {
\\ switch (x) {