3 #![allow(non_camel_case_types)]
5 #![feature(never_type)]
9 struct t {a: u8, b: i8}
10 struct u {a: u8, b: i8, c: u8}
11 struct v {a: u8, b: i8, c: v2, d: u32}
12 struct v2 {u: char, v: u8}
13 struct w {a: isize, b: ()}
14 struct x {a: isize, b: (), c: ()}
29 struct ReorderedStruct {
44 // 0x100 niche variants.
45 _00, _01, _02, _03, _04, _05, _06, _07, _08, _09, _0A, _0B, _0C, _0D, _0E, _0F,
46 _10, _11, _12, _13, _14, _15, _16, _17, _18, _19, _1A, _1B, _1C, _1D, _1E, _1F,
47 _20, _21, _22, _23, _24, _25, _26, _27, _28, _29, _2A, _2B, _2C, _2D, _2E, _2F,
48 _30, _31, _32, _33, _34, _35, _36, _37, _38, _39, _3A, _3B, _3C, _3D, _3E, _3F,
49 _40, _41, _42, _43, _44, _45, _46, _47, _48, _49, _4A, _4B, _4C, _4D, _4E, _4F,
50 _50, _51, _52, _53, _54, _55, _56, _57, _58, _59, _5A, _5B, _5C, _5D, _5E, _5F,
51 _60, _61, _62, _63, _64, _65, _66, _67, _68, _69, _6A, _6B, _6C, _6D, _6E, _6F,
52 _70, _71, _72, _73, _74, _75, _76, _77, _78, _79, _7A, _7B, _7C, _7D, _7E, _7F,
53 _80, _81, _82, _83, _84, _85, _86, _87, _88, _89, _8A, _8B, _8C, _8D, _8E, _8F,
54 _90, _91, _92, _93, _94, _95, _96, _97, _98, _99, _9A, _9B, _9C, _9D, _9E, _9F,
55 _A0, _A1, _A2, _A3, _A4, _A5, _A6, _A7, _A8, _A9, _AA, _AB, _AC, _AD, _AE, _AF,
56 _B0, _B1, _B2, _B3, _B4, _B5, _B6, _B7, _B8, _B9, _BA, _BB, _BC, _BD, _BE, _BF,
57 _C0, _C1, _C2, _C3, _C4, _C5, _C6, _C7, _C8, _C9, _CA, _CB, _CC, _CD, _CE, _CF,
58 _D0, _D1, _D2, _D3, _D4, _D5, _D6, _D7, _D8, _D9, _DA, _DB, _DC, _DD, _DE, _DF,
59 _E0, _E1, _E2, _E3, _E4, _E5, _E6, _E7, _E8, _E9, _EA, _EB, _EC, _ED, _EE, _EF,
60 _F0, _F1, _F2, _F3, _F4, _F5, _F6, _F7, _F8, _F9, _FA, _FB, _FC, _FD, _FE, _FF,
88 enum EnumWithMaybeUninhabitedVariant<T> {
94 enum NicheFilledEnumWithAbsentVariant {
106 assert_eq!(size_of::<u8>(), 1 as usize);
107 assert_eq!(size_of::<u32>(), 4 as usize);
108 assert_eq!(size_of::<char>(), 4 as usize);
109 assert_eq!(size_of::<i8>(), 1 as usize);
110 assert_eq!(size_of::<i32>(), 4 as usize);
111 assert_eq!(size_of::<t>(), 2 as usize);
112 assert_eq!(size_of::<u>(), 3 as usize);
113 // Alignment causes padding before the char and the u32.
115 assert_eq!(size_of::<v>(),
117 assert_eq!(size_of::<isize>(), size_of::<usize>());
118 assert_eq!(size_of::<w>(), size_of::<isize>());
119 assert_eq!(size_of::<x>(), size_of::<isize>());
120 assert_eq!(size_of::<isize>(), size_of::<y>());
122 // Make sure enum types are the appropriate size, mostly
123 // around ensuring alignment is handled properly
125 assert_eq!(size_of::<e1>(), 8 as usize);
126 assert_eq!(size_of::<e2>(), 8 as usize);
127 assert_eq!(size_of::<e3>(), 4 as usize);
128 assert_eq!(size_of::<ReorderedStruct>(), 4);
129 assert_eq!(size_of::<ReorderedEnum>(), 6);
130 assert_eq!(size_of::<ReorderedEnum2>(), 8);
133 assert_eq!(size_of::<EnumEmpty>(), 0);
134 assert_eq!(size_of::<EnumSingle1>(), 0);
135 assert_eq!(size_of::<EnumSingle2>(), 0);
136 assert_eq!(size_of::<EnumSingle3>(), 0);
137 assert_eq!(size_of::<EnumSingle4>(), 1);
138 assert_eq!(size_of::<EnumSingle5>(), 1);
140 assert_eq!(size_of::<EnumWithMaybeUninhabitedVariant<!>>(),
141 size_of::<EnumWithMaybeUninhabitedVariant<()>>());
142 assert_eq!(size_of::<NicheFilledEnumWithAbsentVariant>(), size_of::<&'static ()>());
144 assert_eq!(size_of::<Option<Option<(bool, &())>>>(), size_of::<(bool, &())>());
145 assert_eq!(size_of::<Option<Option<(&(), bool)>>>(), size_of::<(bool, &())>());
146 assert_eq!(size_of::<Option<Option2<bool, &()>>>(), size_of::<(bool, &())>());
147 assert_eq!(size_of::<Option<Option2<&(), bool>>>(), size_of::<(bool, &())>());