326 lines
8.8 KiB
Zig
326 lines
8.8 KiB
Zig
const std = @import("std");
|
|
const builtin = @import("builtin");
|
|
const testing = std.testing;
|
|
const expect = testing.expect;
|
|
const expectEqual = testing.expectEqual;
|
|
|
|
test "one param, explicit comptime" {
|
|
var x: usize = 0;
|
|
x += checkSize(i32);
|
|
x += checkSize(bool);
|
|
x += checkSize(bool);
|
|
try expect(x == 6);
|
|
}
|
|
|
|
fn checkSize(comptime T: type) usize {
|
|
return @sizeOf(T);
|
|
}
|
|
|
|
test "simple generic fn" {
|
|
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
|
|
|
|
try expect(max(i32, 3, -1) == 3);
|
|
try expect(max(u8, 1, 100) == 100);
|
|
if (builtin.zig_backend == .stage1) {
|
|
// TODO: stage2 is incorrectly emitting the following:
|
|
// error: cast of value 1.23e-01 to type 'f32' loses information
|
|
try expect(max(f32, 0.123, 0.456) == 0.456);
|
|
}
|
|
try expect(add(2, 3) == 5);
|
|
}
|
|
|
|
fn max(comptime T: type, a: T, b: T) T {
|
|
return if (a > b) a else b;
|
|
}
|
|
|
|
fn add(comptime a: i32, b: i32) i32 {
|
|
return (comptime a) + b;
|
|
}
|
|
|
|
const the_max = max(u32, 1234, 5678);
|
|
test "compile time generic eval" {
|
|
try expect(the_max == 5678);
|
|
}
|
|
|
|
fn gimmeTheBigOne(a: u32, b: u32) u32 {
|
|
return max(u32, a, b);
|
|
}
|
|
|
|
fn shouldCallSameInstance(a: u32, b: u32) u32 {
|
|
return max(u32, a, b);
|
|
}
|
|
|
|
fn sameButWithFloats(a: f64, b: f64) f64 {
|
|
return max(f64, a, b);
|
|
}
|
|
|
|
test "fn with comptime args" {
|
|
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest;
|
|
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
|
|
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
|
|
|
|
try expect(gimmeTheBigOne(1234, 5678) == 5678);
|
|
try expect(shouldCallSameInstance(34, 12) == 34);
|
|
try expect(sameButWithFloats(0.43, 0.49) == 0.49);
|
|
}
|
|
|
|
test "anytype params" {
|
|
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest;
|
|
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
|
|
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
|
|
|
|
try expect(max_i32(12, 34) == 34);
|
|
try expect(max_f64(1.2, 3.4) == 3.4);
|
|
comptime {
|
|
try expect(max_i32(12, 34) == 34);
|
|
try expect(max_f64(1.2, 3.4) == 3.4);
|
|
}
|
|
}
|
|
|
|
fn max_anytype(a: anytype, b: anytype) @TypeOf(a, b) {
|
|
return if (a > b) a else b;
|
|
}
|
|
|
|
fn max_i32(a: i32, b: i32) i32 {
|
|
return max_anytype(a, b);
|
|
}
|
|
|
|
fn max_f64(a: f64, b: f64) f64 {
|
|
return max_anytype(a, b);
|
|
}
|
|
|
|
test "type constructed by comptime function call" {
|
|
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest;
|
|
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
|
|
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
|
|
|
|
var l: SimpleList(10) = undefined;
|
|
l.array[0] = 10;
|
|
l.array[1] = 11;
|
|
l.array[2] = 12;
|
|
const ptr = @ptrCast([*]u8, &l.array);
|
|
try expect(ptr[0] == 10);
|
|
try expect(ptr[1] == 11);
|
|
try expect(ptr[2] == 12);
|
|
}
|
|
|
|
fn SimpleList(comptime L: usize) type {
|
|
var mutable_T = u8;
|
|
const T = mutable_T;
|
|
return struct {
|
|
array: [L]T,
|
|
};
|
|
}
|
|
|
|
test "function with return type type" {
|
|
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
|
|
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
|
|
|
|
var list: List(i32) = undefined;
|
|
var list2: List(i32) = undefined;
|
|
list.length = 10;
|
|
list2.length = 10;
|
|
try expect(list.prealloc_items.len == 8);
|
|
try expect(list2.prealloc_items.len == 8);
|
|
}
|
|
|
|
pub fn List(comptime T: type) type {
|
|
return SmallList(T, 8);
|
|
}
|
|
|
|
pub fn SmallList(comptime T: type, comptime STATIC_SIZE: usize) type {
|
|
return struct {
|
|
items: []T,
|
|
length: usize,
|
|
prealloc_items: [STATIC_SIZE]T,
|
|
};
|
|
}
|
|
|
|
test "const decls in struct" {
|
|
try expect(GenericDataThing(3).count_plus_one == 4);
|
|
}
|
|
fn GenericDataThing(comptime count: isize) type {
|
|
return struct {
|
|
const count_plus_one = count + 1;
|
|
};
|
|
}
|
|
|
|
test "use generic param in generic param" {
|
|
try expect(aGenericFn(i32, 3, 4) == 7);
|
|
}
|
|
fn aGenericFn(comptime T: type, comptime a: T, b: T) T {
|
|
return a + b;
|
|
}
|
|
|
|
test "generic fn with implicit cast" {
|
|
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
|
|
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
|
|
|
|
try expect(getFirstByte(u8, &[_]u8{13}) == 13);
|
|
try expect(getFirstByte(u16, &[_]u16{
|
|
0,
|
|
13,
|
|
}) == 0);
|
|
}
|
|
fn getByte(ptr: ?*const u8) u8 {
|
|
return ptr.?.*;
|
|
}
|
|
fn getFirstByte(comptime T: type, mem: []const T) u8 {
|
|
return getByte(@ptrCast(*const u8, &mem[0]));
|
|
}
|
|
|
|
test "generic fn keeps non-generic parameter types" {
|
|
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
|
|
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
|
|
|
|
const A = 128;
|
|
|
|
const S = struct {
|
|
fn f(comptime T: type, s: []T) !void {
|
|
try expect(A != @typeInfo(@TypeOf(s)).Pointer.alignment);
|
|
}
|
|
};
|
|
|
|
// The compiler monomorphizes `S.f` for `T=u8` on its first use, check that
|
|
// `x` type not affect `s` parameter type.
|
|
var x: [16]u8 align(A) = undefined;
|
|
try S.f(u8, &x);
|
|
}
|
|
|
|
test "array of generic fns" {
|
|
try expect(foos[0](true));
|
|
try expect(!foos[1](true));
|
|
}
|
|
|
|
const foos = [_]fn (anytype) bool{
|
|
foo1,
|
|
foo2,
|
|
};
|
|
|
|
fn foo1(arg: anytype) bool {
|
|
return arg;
|
|
}
|
|
fn foo2(arg: anytype) bool {
|
|
return !arg;
|
|
}
|
|
|
|
test "generic struct" {
|
|
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest;
|
|
var a1 = GenNode(i32){
|
|
.value = 13,
|
|
.next = null,
|
|
};
|
|
var b1 = GenNode(bool){
|
|
.value = true,
|
|
.next = null,
|
|
};
|
|
try expect(a1.value == 13);
|
|
try expect(a1.value == a1.getVal());
|
|
try expect(b1.getVal());
|
|
}
|
|
fn GenNode(comptime T: type) type {
|
|
return struct {
|
|
value: T,
|
|
next: ?*GenNode(T),
|
|
fn getVal(n: *const GenNode(T)) T {
|
|
return n.value;
|
|
}
|
|
};
|
|
}
|
|
|
|
test "function parameter is generic" {
|
|
const S = struct {
|
|
pub fn init(pointer: anytype, comptime fillFn: fn (ptr: *@TypeOf(pointer)) void) void {
|
|
_ = fillFn;
|
|
}
|
|
pub fn fill(self: *u32) void {
|
|
_ = self;
|
|
}
|
|
};
|
|
var rng: u32 = 2;
|
|
S.init(rng, S.fill);
|
|
}
|
|
|
|
test "generic function instantiation turns into comptime call" {
|
|
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
|
|
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
|
|
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
|
|
|
|
const S = struct {
|
|
fn doTheTest() !void {
|
|
const E1 = enum { A };
|
|
const e1f = fieldInfo(E1, .A);
|
|
try expect(std.mem.eql(u8, e1f.name, "A"));
|
|
}
|
|
|
|
pub fn fieldInfo(comptime T: type, comptime field: FieldEnum(T)) switch (@typeInfo(T)) {
|
|
.Enum => std.builtin.Type.EnumField,
|
|
else => void,
|
|
} {
|
|
return @typeInfo(T).Enum.fields[@enumToInt(field)];
|
|
}
|
|
|
|
pub fn FieldEnum(comptime T: type) type {
|
|
_ = T;
|
|
var enumFields: [1]std.builtin.Type.EnumField = .{.{ .name = "A", .value = 0 }};
|
|
return @Type(.{
|
|
.Enum = .{
|
|
.layout = .Auto,
|
|
.tag_type = u0,
|
|
.fields = &enumFields,
|
|
.decls = &.{},
|
|
.is_exhaustive = true,
|
|
},
|
|
});
|
|
}
|
|
};
|
|
try S.doTheTest();
|
|
}
|
|
|
|
test "generic function with void and comptime parameter" {
|
|
const S = struct { x: i32 };
|
|
const namespace = struct {
|
|
fn foo(v: void, s: *S, comptime T: type) !void {
|
|
_ = @as(void, v);
|
|
try expect(s.x == 1234);
|
|
try expect(T == u8);
|
|
}
|
|
};
|
|
var s: S = .{ .x = 1234 };
|
|
try namespace.foo({}, &s, u8);
|
|
}
|
|
|
|
test "anonymous struct return type referencing comptime parameter" {
|
|
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
|
|
|
|
const S = struct {
|
|
pub fn extraData(comptime T: type, index: usize) struct { data: T, end: usize } {
|
|
return .{
|
|
.data = 1234,
|
|
.end = index,
|
|
};
|
|
}
|
|
};
|
|
const s = S.extraData(i32, 5678);
|
|
try expect(s.data == 1234);
|
|
try expect(s.end == 5678);
|
|
}
|
|
|
|
test "generic function instantiation non-duplicates" {
|
|
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
|
|
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
|
|
if (builtin.os.tag == .wasi) return error.SkipZigTest;
|
|
|
|
const S = struct {
|
|
fn copy(comptime T: type, dest: []T, source: []const T) void {
|
|
@export(foo, .{ .name = "test_generic_instantiation_non_dupe" });
|
|
for (source) |s, i| dest[i] = s;
|
|
}
|
|
|
|
fn foo() callconv(.C) void {}
|
|
};
|
|
var buffer: [100]u8 = undefined;
|
|
S.copy(u8, &buffer, "hello");
|
|
S.copy(u8, &buffer, "hello2");
|
|
}
|