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const assert = @import("std").debug.assert;
const StructWithNoFields = struct {
fn add(a: i32, b: i32) -> i32 { a + b }
};
const empty_global_instance = StructWithNoFields {};
fn callStructStaticMethod() {
@setFnTest(this);
const result = StructWithNoFields.add(3, 4);
assert(result == 7);
}
fn returnEmptyStructInstance() -> StructWithNoFields {
@setFnTest(this);
return empty_global_instance;
}
const should_be_11 = StructWithNoFields.add(5, 6);
fn invokeStaticMethodInGlobalScope() {
@setFnTest(this);
assert(should_be_11 == 11);
}
fn voidStructFields() {
@setFnTest(this);
const foo = VoidStructFieldsFoo {
.a = void{},
.b = 1,
.c = void{},
};
assert(foo.b == 1);
assert(@sizeOf(VoidStructFieldsFoo) == 4);
}
const VoidStructFieldsFoo = struct {
a : void,
b : i32,
c : void,
};
pub fn structs() {
@setFnTest(this);
var foo: StructFoo = undefined;
@memset((&u8)(&foo), 0, @sizeOf(StructFoo));
foo.a += 1;
foo.b = foo.a == 1;
testFoo(foo);
testMutation(&foo);
assert(foo.c == 100);
}
const StructFoo = struct {
a : i32,
b : bool,
c : f32,
};
fn testFoo(foo : StructFoo) {
assert(foo.b);
}
fn testMutation(foo : &StructFoo) {
foo.c = 100;
}
const Node = struct {
val: Val,
next: &Node,
};
const Val = struct {
x: i32,
};
fn structPointToSelf() {
@setFnTest(this);
var root : Node = undefined;
root.val.x = 1;
var node : Node = undefined;
node.next = &root;
node.val.x = 2;
root.next = &node;
assert(node.next.next.next.val.x == 1);
}
fn structByvalAssign() {
@setFnTest(this);
var foo1 : StructFoo = undefined;
var foo2 : StructFoo = undefined;
foo1.a = 1234;
foo2.a = 0;
assert(foo2.a == 0);
foo2 = foo1;
assert(foo2.a == 1234);
}
fn structInitializer() {
const val = Val { .x = 42 };
assert(val.x == 42);
}
fn fnCallOfStructField() {
@setFnTest(this);
assert(callStructField(Foo {.ptr = aFunc,}) == 13);
}
const Foo = struct {
ptr: fn() -> i32,
};
fn aFunc() -> i32 { 13 }
fn callStructField(foo: Foo) -> i32 {
return foo.ptr();
}
fn storeMemberFunctionInVariable() {
@setFnTest(this);
const instance = MemberFnTestFoo { .x = 1234, };
const memberFn = MemberFnTestFoo.member;
const result = memberFn(instance);
assert(result == 1234);
}
const MemberFnTestFoo = struct {
x: i32,
fn member(foo: MemberFnTestFoo) -> i32 { foo.x }
};
fn callMemberFunctionDirectly() {
@setFnTest(this);
const instance = MemberFnTestFoo { .x = 1234, };
const result = MemberFnTestFoo.member(instance);
assert(result == 1234);
}
fn memberFunctions() {
@setFnTest(this);
const r = MemberFnRand {.seed = 1234};
assert(r.getSeed() == 1234);
}
const MemberFnRand = struct {
seed: u32,
pub fn getSeed(r: &const MemberFnRand) -> u32 {
r.seed
}
};
fn returnStructByvalFromFunction() {
@setFnTest(this);
const bar = makeBar(1234, 5678);
assert(bar.y == 5678);
}
const Bar = struct {
x: i32,
y: i32,
};
fn makeBar(x: i32, y: i32) -> Bar {
Bar {
.x = x,
.y = y,
}
}
fn emptyStructMethodCall() {
@setFnTest(this);
const es = EmptyStruct{};
assert(es.method() == 1234);
}
const EmptyStruct = struct {
fn method(es: &const EmptyStruct) -> i32 {
1234
}
};
fn returnEmptyStructFromFn() {
@setFnTest(this);
testReturnEmptyStructFromFn();
}
const EmptyStruct2 = struct {};
fn testReturnEmptyStructFromFn() -> EmptyStruct2 {
EmptyStruct2 {}
}
fn passSliceOfEmptyStructToFn() {
@setFnTest(this);
assert(testPassSliceOfEmptyStructToFn([]EmptyStruct2{ EmptyStruct2{} }) == 1);
}
fn testPassSliceOfEmptyStructToFn(slice: []EmptyStruct2) -> usize {
slice.len
}
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