41 lines
947 B
Zig
41 lines
947 B
Zig
const assert = @import("std").debug.assert;
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const mem = @import("std").mem;
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const x = @intToPtr(&i32, 0x1000)[0..0x500];
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const y = x[0x100..];
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test "compile time slice of pointer to hard coded address" {
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assert(@ptrToInt(x.ptr) == 0x1000);
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assert(x.len == 0x500);
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assert(@ptrToInt(y.ptr) == 0x1100);
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assert(y.len == 0x400);
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}
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test "slice child property" {
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var array: [5]i32 = undefined;
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var slice = array[0..];
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assert(@typeOf(slice).Child == i32);
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}
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test "runtime safety lets us slice from len..len" {
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var an_array = []u8{
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1,
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2,
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3,
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};
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assert(mem.eql(u8, sliceFromLenToLen(an_array[0..], 3, 3), ""));
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}
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fn sliceFromLenToLen(a_slice: []u8, start: usize, end: usize) []u8 {
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return a_slice[start..end];
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}
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test "implicitly cast array of size 0 to slice" {
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var msg = []u8{};
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assertLenIsZero(msg);
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}
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fn assertLenIsZero(msg: []const u8) void {
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assert(msg.len == 0);
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}
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