92 lines
1.8 KiB
Zig
92 lines
1.8 KiB
Zig
fn arrays() {
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@setFnTest(this);
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var array : [5]u32 = undefined;
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var i : u32 = 0;
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while (i < 5) {
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array[i] = i + 1;
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i = array[i];
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}
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i = 0;
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var accumulator = u32(0);
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while (i < 5) {
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accumulator += array[i];
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i += 1;
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}
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assert(accumulator == 15);
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assert(getArrayLen(array) == 5);
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}
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fn getArrayLen(a: []u32) -> usize {
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a.len
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}
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fn voidArrays() {
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@setFnTest(this);
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var array: [4]void = undefined;
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array[0] = void{};
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array[1] = array[2];
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assert(@sizeOf(@typeOf(array)) == 0);
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assert(array.len == 4);
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}
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fn arrayLiteral() {
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@setFnTest(this);
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const hex_mult = []u16{4096, 256, 16, 1};
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assert(hex_mult.len == 4);
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assert(hex_mult[1] == 256);
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}
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fn arrayDotLenConstExpr() {
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@setFnTest(this);
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assert(@staticEval(some_array.len) == 4);
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}
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const ArrayDotLenConstExpr = struct {
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y: [some_array.len]u8,
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};
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const some_array = []u8 {0, 1, 2, 3};
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fn nestedArrays() {
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@setFnTest(this);
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const array_of_strings = [][]u8 {"hello", "this", "is", "my", "thing"};
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for (array_of_strings) |s, i| {
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if (i == 0) assert(memeql(s, "hello"));
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if (i == 1) assert(memeql(s, "this"));
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if (i == 2) assert(memeql(s, "is"));
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if (i == 3) assert(memeql(s, "my"));
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if (i == 4) assert(memeql(s, "thing"));
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}
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}
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// TODO const assert = @import("std").debug.assert;
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fn assert(ok: bool) {
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if (!ok)
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@unreachable();
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}
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// TODO import from std.str
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pub fn memeql(a: []const u8, b: []const u8) -> bool {
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sliceEql(u8, a, b)
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}
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// TODO import from std.str
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pub fn sliceEql(inline T: type, a: []const T, b: []const T) -> bool {
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if (a.len != b.len) return false;
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for (a) |item, index| {
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if (b[index] != item) return false;
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}
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return true;
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}
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