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const assert = @import("std").debug.assert;
const mem = @import("std").mem;
test "arrays" {
var array : [5]u32 = undefined;
var i : u32 = 0;
while (i < 5) {
array[i] = i + 1;
i = array[i];
}
i = 0;
var accumulator = u32(0);
while (i < 5) {
accumulator += array[i];
i += 1;
}
assert(accumulator == 15);
assert(getArrayLen(array) == 5);
}
fn getArrayLen(a: []const u32) -> usize {
a.len
}
test "voidArrays" {
var array: [4]void = undefined;
array[0] = void{};
array[1] = array[2];
assert(@sizeOf(@typeOf(array)) == 0);
assert(array.len == 4);
}
test "arrayLiteral" {
const hex_mult = []u16{4096, 256, 16, 1};
assert(hex_mult.len == 4);
assert(hex_mult[1] == 256);
}
test "arrayDotLenConstExpr" {
assert(comptime {some_array.len == 4});
}
const ArrayDotLenConstExpr = struct {
y: [some_array.len]u8,
};
const some_array = []u8 {0, 1, 2, 3};
test "nestedArrays" {
const array_of_strings = [][]const u8 {"hello", "this", "is", "my", "thing"};
for (array_of_strings) |s, i| {
if (i == 0) assert(mem.eql(u8, s, "hello"));
if (i == 1) assert(mem.eql(u8, s, "this"));
if (i == 2) assert(mem.eql(u8, s, "is"));
if (i == 3) assert(mem.eql(u8, s, "my"));
if (i == 4) assert(mem.eql(u8, s, "thing"));
}
}
var s_array: [8]Sub = undefined;
const Sub = struct {
b: u8,
};
const Str = struct {
a: []Sub,
};
test "setGlobalVarArrayViaSliceEmbeddedInStruct" {
var s = Str { .a = s_array[0...]};
s.a[0].b = 1;
s.a[1].b = 2;
s.a[2].b = 3;
assert(s_array[0].b == 1);
assert(s_array[1].b == 2);
assert(s_array[2].b == 3);
}
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