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Prevent bitCast to enum types

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Stop the user from creating invalid enum values.
This commit is contained in:
LemonBoy
2020-01-06 19:54:14 +01:00
committed by Andrew Kelley
parent 7e7d0e1ffa
commit 8c640b3e60
2 changed files with 18 additions and 5 deletions
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14
test/compile_errors.zig
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@@ -2,6 +2,14 @@ const tests = @import("tests.zig");
const builtin = @import("builtin");
pub fn addCases(cases: *tests.CompileErrorContext) void {
cases.add("bitCast to enum type",
\\export fn entry() void {
\\ const y = @bitCast(enum(u32) { a, b }, @as(u32, 3));
\\}
, &[_][]const u8{
"tmp.zig:2:24: error: cannot cast a value of type 'y'",
});
cases.add("comparing against undefined produces undefined value",
\\export fn entry() void {
\\ if (2 == undefined) {}
@@ -31,8 +39,7 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
"tmp.zig:3:12: note: destination pointer requires a terminating '0' sentinel",
});
cases.add(
"cmpxchg with float",
cases.add("cmpxchg with float",
\\export fn entry() void {
\\ var x: f32 = 0;
\\ _ = @cmpxchgWeak(f32, &x, 1, 2, .SeqCst, .SeqCst);
@@ -41,8 +48,7 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
"tmp.zig:3:22: error: expected integer, enum or pointer type, found 'f32'",
});
cases.add(
"atomicrmw with float op not .Xchg, .Add or .Sub",
cases.add("atomicrmw with float op not .Xchg, .Add or .Sub",
\\export fn entry() void {
\\ var x: f32 = 0;
\\ _ = @atomicRmw(f32, &x, .And, 2, .SeqCst);