← Back to index | Original Bugzilla link

Bug 8566 – Inconsistency in aligning named and anonymous structs

Status: RESOLVED
Resolution: INVALID
Severity: normal
Priority: P2
Component: dmd
Product: D
Version: D2
Platform: All
OS: All
Creation time: 2012-08-20T05:47:00Z
Last change time: 2012-08-20T15:23:26Z
Assigned to: nobody
Creator: public

Comments

Comment #0 by public — 2012-08-20T05:47:51Z

Code sample: ================================================= import std.stdio; union Anonymous { char[9] buffer; align(1) struct { align(1): int a; int b; char c; } } union Named { char[9] buffer; align(1) struct Name { align(1): int a; int b; char c; } } void main() { writeln(Named.sizeof); writeln(Anonymous.sizeof); } ================================================= Output: 9 12

Comment #1 by bugzilla — 2012-08-20T15:23:26Z

An unnamed struct/union allocates storage for its members. A named one does not, it just defines a type. Hence the size difference.