motiejus/zig
1
Fork 0
Code Releases Activity

ptrCast gives compile error for increasing alignment

Browse Source 
See #37
This commit is contained in:
Andrew Kelley
2017-08-29 16:52:31 -04:00
parent be94299666
commit 816689a3b1
10 changed files with 69 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
test/compile_errors.zig
View File

@@ -2011,4 +2011,15 @@ pub fn addCases(cases: &tests.CompileErrorContext) {
\\}
,
".tmp_source.zig:9:17: error: expected type '[]u32', found '[]align 1 u32'");
cases.add("increase pointer alignment in @ptrCast",
\\export fn entry() -> u32 {
\\ var bytes: [4]u8 align 4 = []u8{0x01, 0x02, 0x03, 0x04};
\\ const ptr = @ptrCast(&u32, &bytes[0]);
\\ return *ptr;
\\}
,
".tmp_source.zig:3:17: error: cast increases pointer alignment",
".tmp_source.zig:3:38: note: '&u8' has alignment 1",
".tmp_source.zig:3:27: note: '&u32' has alignment 4");
}