8fd0fddce5
* In-progress os.ChildProcess.spawn implementation. See #204 * Add explicit cast from integer to error. Closes #294 * fix casting from error to integer * fix compiler crash when initializing variable to undefined with no type
44 lines
986 B
Zig
44 lines
986 B
Zig
const assert = @import("std").debug.assert;
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test "intToPtrCast" {
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const x = isize(13);
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const y = (&u8)(x);
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const z = usize(y);
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assert(z == 13);
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}
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test "numLitIntToPtrCast" {
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const vga_mem = (&u16)(0xB8000);
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assert(usize(vga_mem) == 0xB8000);
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}
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test "pointerReinterpretConstFloatToInt" {
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const float: f64 = 5.99999999999994648725e-01;
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const float_ptr = &float;
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const int_ptr = @ptrcast(&i32, float_ptr);
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const int_val = *int_ptr;
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assert(int_val == 858993411);
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}
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test "implicitly cast a pointer to a const pointer of it" {
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var x: i32 = 1;
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const xp = &x;
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funcWithConstPtrPtr(xp);
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assert(x == 2);
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}
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fn funcWithConstPtrPtr(x: &const &i32) {
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**x += 1;
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}
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error ItBroke;
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test "explicit cast from integer to error type" {
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testCastIntToErr(error.ItBroke);
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comptime testCastIntToErr(error.ItBroke);
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}
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fn testCastIntToErr(err: error) {
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const x = usize(err);
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const y = error(x);
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assert(error.ItBroke == y);
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}
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