mirror of
https://github.com/ziglang/zig.git
synced 2025-12-19 20:53:14 +00:00
cb616cb797
* Update AIR instruction `intcast` to allow the dest type to be an enum. * LLVM backend: update `intcast` to support when the bit counts of operand and dest type are the same. This was already a requirement of the instruction previously. * Type: `intInfo` supports the case when the type is an enum, and retrieves the info for the integer tag type. This makes it pretty easy for backends to implement `intcast` without having to care explicitly that the new type is an enum. As a bonus, simple enums never have to go through the type system; their signedness and bit count are computed directly. The "int to enum" behavior test case is now passing for stage2 in the LLVM backend.
586 lines
6.3 KiB
Zig
586 lines
6.3 KiB
Zig
const std = @import("std");
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const expect = std.testing.expect;
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const mem = std.mem;
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const Tag = std.meta.Tag;
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const Number = enum { Zero, One, Two, Three, Four };
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fn shouldEqual(n: Number, expected: u3) !void {
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try expect(@enumToInt(n) == expected);
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}
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test "enum to int" {
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try shouldEqual(Number.Zero, 0);
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try shouldEqual(Number.One, 1);
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try shouldEqual(Number.Two, 2);
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try shouldEqual(Number.Three, 3);
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try shouldEqual(Number.Four, 4);
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}
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fn testIntToEnumEval(x: i32) !void {
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try expect(@intToEnum(IntToEnumNumber, x) == IntToEnumNumber.Three);
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}
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const IntToEnumNumber = enum { Zero, One, Two, Three, Four };
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test "int to enum" {
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try testIntToEnumEval(3);
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}
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const ValueCount1 = enum {
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I0,
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};
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const ValueCount2 = enum {
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I0,
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I1,
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};
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const ValueCount256 = enum {
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I0,
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I1,
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I2,
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I3,
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I4,
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I5,
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I6,
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I7,
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I8,
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I9,
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I10,
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I11,
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I12,
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I13,
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I14,
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I15,
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I16,
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I17,
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I18,
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I19,
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I20,
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I21,
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I22,
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I23,
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I24,
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I25,
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I26,
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I27,
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I28,
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I29,
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I30,
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I31,
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I32,
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I33,
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I34,
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I35,
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I36,
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I37,
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I38,
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I39,
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I40,
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I41,
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I42,
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I43,
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I45,
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I46,
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I48,
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I49,
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I50,
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I51,
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I52,
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I53,
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I54,
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I55,
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I56,
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I57,
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I58,
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I59,
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I60,
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I61,
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I62,
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I63,
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I64,
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I65,
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I66,
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I67,
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I68,
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I69,
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I70,
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I71,
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I72,
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I74,
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I76,
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I77,
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I78,
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I79,
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I80,
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I81,
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I82,
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I83,
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I84,
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I85,
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I86,
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I87,
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I88,
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I89,
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I90,
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I91,
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I92,
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I93,
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I94,
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I95,
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I96,
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I97,
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I98,
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I99,
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I100,
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I101,
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I102,
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I103,
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I104,
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I105,
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I106,
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I107,
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I108,
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I109,
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I110,
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I111,
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I112,
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I113,
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I114,
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I115,
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I116,
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I117,
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I118,
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I119,
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I120,
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I121,
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I122,
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I123,
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I124,
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I125,
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I126,
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I127,
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I128,
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I129,
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I130,
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I131,
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I132,
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I133,
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I134,
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I135,
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I136,
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I137,
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I138,
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I139,
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I140,
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I142,
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I146,
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I147,
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I148,
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I149,
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I150,
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I151,
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I152,
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I153,
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I154,
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I155,
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I156,
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I157,
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I158,
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I159,
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I160,
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I161,
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I162,
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I163,
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I164,
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I165,
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I166,
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I167,
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I168,
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I169,
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I170,
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I171,
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I172,
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I173,
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I174,
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I175,
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I176,
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I177,
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I178,
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I179,
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I180,
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I181,
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I182,
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I183,
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I184,
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I185,
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I186,
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I187,
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I188,
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I190,
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I191,
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I192,
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I197,
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I198,
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I199,
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I200,
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I201,
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I202,
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I203,
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I204,
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I214,
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I215,
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I216,
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I217,
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I218,
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I219,
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I220,
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I221,
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I222,
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I223,
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I224,
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I225,
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I226,
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I227,
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I228,
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I229,
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I230,
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I231,
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I232,
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I233,
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I234,
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I235,
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I236,
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I237,
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I238,
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I239,
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I240,
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I241,
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I242,
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I243,
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I244,
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I245,
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I246,
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I247,
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I248,
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I249,
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I250,
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I251,
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I252,
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I253,
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I254,
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I255,
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};
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const ValueCount257 = enum {
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I0,
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I1,
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I2,
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I3,
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I4,
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I5,
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I6,
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I7,
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I8,
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I9,
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I10,
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I11,
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I12,
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I13,
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I14,
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I15,
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I16,
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I17,
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I18,
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I19,
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I20,
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I21,
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I22,
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I23,
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I24,
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I25,
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I26,
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I27,
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I28,
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I29,
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I30,
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I31,
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I32,
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I33,
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I34,
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I35,
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I36,
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I37,
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I38,
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I39,
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I40,
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I41,
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I42,
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I43,
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I44,
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I45,
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I46,
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I47,
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I48,
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I49,
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I50,
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I51,
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I52,
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I53,
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I54,
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I55,
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I56,
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I57,
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I58,
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I59,
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I60,
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I61,
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I62,
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I63,
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I64,
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I65,
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I66,
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I67,
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I68,
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I69,
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I70,
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I71,
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I72,
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I73,
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I74,
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I75,
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I76,
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I77,
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I78,
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I79,
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I80,
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I81,
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I82,
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I83,
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I84,
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I85,
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I86,
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I87,
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I88,
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I89,
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I90,
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I91,
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I92,
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I93,
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I94,
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I95,
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I96,
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I97,
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I98,
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I99,
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I100,
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I101,
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I102,
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I103,
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I104,
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I105,
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I106,
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I107,
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I108,
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I109,
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I110,
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I111,
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I112,
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I113,
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I114,
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I115,
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I116,
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I117,
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I118,
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I119,
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I120,
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I121,
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I122,
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I123,
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I124,
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I125,
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I126,
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I127,
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I128,
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I129,
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I130,
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I131,
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I132,
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I133,
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I134,
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I135,
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I136,
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I137,
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I138,
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I139,
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I140,
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I141,
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I142,
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I143,
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I144,
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I145,
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I146,
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I147,
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I148,
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I149,
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I150,
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I151,
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I152,
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I153,
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I154,
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I155,
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I156,
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I157,
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I158,
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I159,
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I160,
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I161,
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I162,
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I163,
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I164,
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I165,
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I166,
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I167,
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I168,
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I169,
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I170,
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I171,
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I172,
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I173,
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I174,
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I175,
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I176,
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I177,
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I178,
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I179,
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I180,
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I182,
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I183,
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I184,
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I185,
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I186,
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I187,
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I188,
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I189,
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I190,
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I191,
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I192,
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I193,
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I194,
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I195,
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I196,
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I197,
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I198,
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I199,
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I200,
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I201,
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I202,
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I203,
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I204,
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I205,
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I206,
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I207,
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I208,
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I209,
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I210,
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I211,
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I212,
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I214,
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I215,
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I216,
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I217,
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I218,
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I219,
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I220,
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I221,
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I222,
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I223,
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I224,
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I225,
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I226,
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I227,
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I228,
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I229,
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I230,
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I231,
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I232,
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I233,
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I234,
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I235,
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I236,
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I237,
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I238,
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I239,
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I240,
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I241,
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I242,
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I243,
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I244,
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I245,
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I246,
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I247,
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I248,
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I249,
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I250,
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I251,
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I252,
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I253,
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I254,
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I255,
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I256,
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};
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test "enum sizes" {
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comptime {
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try expect(@sizeOf(ValueCount1) == 0);
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try expect(@sizeOf(ValueCount2) == 1);
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try expect(@sizeOf(ValueCount256) == 1);
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try expect(@sizeOf(ValueCount257) == 2);
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}
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}
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test "enum literal equality" {
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const x = .hi;
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const y = .ok;
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const z = .hi;
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try expect(x != y);
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try expect(x == z);
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}
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test "enum literal cast to enum" {
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const Color = enum { Auto, Off, On };
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var color1: Color = .Auto;
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var color2 = Color.Auto;
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try expect(color1 == color2);
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}
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test "peer type resolution with enum literal" {
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const Items = enum { one, two };
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try expect(Items.two == .two);
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try expect(.two == Items.two);
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}
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