motiejus/zig
1
Fork 0
Code Releases Activity

stage1: Fix @Type(.Enum) with invalid tag_type

Browse Source 
Fixes https://github.com/ziglang/zig/issues/6459
This commit is contained in:
Tadeo Kondrak
2020-09-29 14:01:20 -06:00
parent fe117d9961
commit e903b00eec
2 changed files with 43 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
test/compile_errors.zig
View File

@@ -2,6 +2,42 @@ const tests = @import("tests.zig");
const std = @import("std");
pub fn addCases(cases: *tests.CompileErrorContext) void {
cases.add("@Type for exhaustive enum with undefined tag type",
\\const TypeInfo = @import("builtin").TypeInfo;
\\const Tag = @Type(.{
\\ .Enum = .{
\\ .layout = .Auto,
\\ .tag_type = undefined,
\\ .fields = &[_]TypeInfo.EnumField{},
\\ .decls = &[_]TypeInfo.Declaration{},
\\ .is_exhaustive = false,
\\ },
\\});
\\export fn entry() void {
\\ _ = @intToEnum(Tag, 0);
\\}
, &[_][]const u8{
"tmp.zig:2:20: error: use of undefined value here causes undefined behavior",
});
cases.add("@Type for exhaustive enum with non-integer tag type",
\\const TypeInfo = @import("builtin").TypeInfo;
\\const Tag = @Type(.{
\\ .Enum = .{
\\ .layout = .Auto,
\\ .tag_type = bool,
\\ .fields = &[_]TypeInfo.EnumField{},
\\ .decls = &[_]TypeInfo.Declaration{},
\\ .is_exhaustive = false,
\\ },
\\});
\\export fn entry() void {
\\ _ = @intToEnum(Tag, 0);
\\}
, &[_][]const u8{
"tmp.zig:2:20: error: TypeInfo.Enum.tag_type must be an integer type, not 'bool'",
});
cases.add("slice sentinel mismatch",
\\export fn entry() void {
\\ const x = @import("std").meta.Vector(3, f32){ 25, 75, 5, 0 };