stage2: pass some pointer tests

 * New AIR instructions: ptr_add, ptr_sub, ptr_elem_val, ptr_ptr_elem_val
   - See the doc comments for details.
 * Sema: implement runtime pointer arithmetic.
 * Sema: implement elem_val for many-pointers.
 * Sema: support coercion from `*[N:s]T` to `[*]T`.
 * Type: isIndexable handles many-pointers.

1 files changed, 0 insertions, 301 deletions

diff --git a/test/behavior/pointers.zig b/test/behavior/pointers.zig
index bb95d3c219..4fcd78b1d6 100644
--- a/test/behavior/pointers.zig
+++ b/test/behavior/pointers.zig
@@ -15,22 +15,6 @@ fn testDerefPtr() !void {
     try expect(x == 1235);
 }
 
-const Foo1 = struct {
-    x: void,
-};
-
-test "dereference pointer again" {
-    try testDerefPtrOneVal();
-    comptime try testDerefPtrOneVal();
-}
-
-fn testDerefPtrOneVal() !void {
-    // Foo1 satisfies the OnePossibleValueYes criteria
-    const x = &Foo1{ .x = {} };
-    const y = x.*;
-    try expect(@TypeOf(y.x) == void);
-}
-
 test "pointer arithmetic" {
     var ptr: [*]const u8 = "abcd";
 
@@ -60,288 +44,3 @@ test "double pointer parsing" {
 fn PtrOf(comptime T: type) type {
     return *T;
 }
-
-test "assigning integer to C pointer" {
-    var x: i32 = 0;
-    var ptr: [*c]u8 = 0;
-    var ptr2: [*c]u8 = x;
-    if (false) {
-        ptr;
-        ptr2;
-    }
-}
-
-test "implicit cast single item pointer to C pointer and back" {
-    var y: u8 = 11;
-    var x: [*c]u8 = &y;
-    var z: *u8 = x;
-    z.* += 1;
-    try expect(y == 12);
-}
-
-test "C pointer comparison and arithmetic" {
-    const S = struct {
-        fn doTheTest() !void {
-            var ptr1: [*c]u32 = 0;
-            var ptr2 = ptr1 + 10;
-            try expect(ptr1 == 0);
-            try expect(ptr1 >= 0);
-            try expect(ptr1 <= 0);
-            // expect(ptr1 < 1);
-            // expect(ptr1 < one);
-            // expect(1 > ptr1);
-            // expect(one > ptr1);
-            try expect(ptr1 < ptr2);
-            try expect(ptr2 > ptr1);
-            try expect(ptr2 >= 40);
-            try expect(ptr2 == 40);
-            try expect(ptr2 <= 40);
-            ptr2 -= 10;
-            try expect(ptr1 == ptr2);
-        }
-    };
-    try S.doTheTest();
-    comptime try S.doTheTest();
-}
-
-test "peer type resolution with C pointers" {
-    var ptr_one: *u8 = undefined;
-    var ptr_many: [*]u8 = undefined;
-    var ptr_c: [*c]u8 = undefined;
-    var t = true;
-    var x1 = if (t) ptr_one else ptr_c;
-    var x2 = if (t) ptr_many else ptr_c;
-    var x3 = if (t) ptr_c else ptr_one;
-    var x4 = if (t) ptr_c else ptr_many;
-    try expect(@TypeOf(x1) == [*c]u8);
-    try expect(@TypeOf(x2) == [*c]u8);
-    try expect(@TypeOf(x3) == [*c]u8);
-    try expect(@TypeOf(x4) == [*c]u8);
-}
-
-test "implicit casting between C pointer and optional non-C pointer" {
-    var slice: []const u8 = "aoeu";
-    const opt_many_ptr: ?[*]const u8 = slice.ptr;
-    var ptr_opt_many_ptr = &opt_many_ptr;
-    var c_ptr: [*c]const [*c]const u8 = ptr_opt_many_ptr;
-    try expect(c_ptr.*.* == 'a');
-    ptr_opt_many_ptr = c_ptr;
-    try expect(ptr_opt_many_ptr.*.?[1] == 'o');
-}
-
-test "implicit cast error unions with non-optional to optional pointer" {
-    const S = struct {
-        fn doTheTest() !void {
-            try expectError(error.Fail, foo());
-        }
-        fn foo() anyerror!?*u8 {
-            return bar() orelse error.Fail;
-        }
-        fn bar() ?*u8 {
-            return null;
-        }
-    };
-    try S.doTheTest();
-    comptime try S.doTheTest();
-}
-
-test "initialize const optional C pointer to null" {
-    const a: ?[*c]i32 = null;
-    try expect(a == null);
-    comptime try expect(a == null);
-}
-
-test "compare equality of optional and non-optional pointer" {
-    const a = @intToPtr(*const usize, 0x12345678);
-    const b = @intToPtr(?*usize, 0x12345678);
-    try expect(a == b);
-    try expect(b == a);
-}
-
-test "allowzero pointer and slice" {
-    var ptr = @intToPtr([*]allowzero i32, 0);
-    var opt_ptr: ?[*]allowzero i32 = ptr;
-    try expect(opt_ptr != null);
-    try expect(@ptrToInt(ptr) == 0);
-    var runtime_zero: usize = 0;
-    var slice = ptr[runtime_zero..10];
-    comptime try expect(@TypeOf(slice) == []allowzero i32);
-    try expect(@ptrToInt(&slice[5]) == 20);
-
-    comptime try expect(@typeInfo(@TypeOf(ptr)).Pointer.is_allowzero);
-    comptime try expect(@typeInfo(@TypeOf(slice)).Pointer.is_allowzero);
-}
-
-test "assign null directly to C pointer and test null equality" {
-    var x: [*c]i32 = null;
-    try expect(x == null);
-    try expect(null == x);
-    try expect(!(x != null));
-    try expect(!(null != x));
-    if (x) |same_x| {
-        _ = same_x;
-        @panic("fail");
-    }
-    var otherx: i32 = undefined;
-    try expect((x orelse &otherx) == &otherx);
-
-    const y: [*c]i32 = null;
-    comptime try expect(y == null);
-    comptime try expect(null == y);
-    comptime try expect(!(y != null));
-    comptime try expect(!(null != y));
-    if (y) |same_y| {
-        _ = same_y;
-        @panic("fail");
-    }
-    const othery: i32 = undefined;
-    comptime try expect((y orelse &othery) == &othery);
-
-    var n: i32 = 1234;
-    var x1: [*c]i32 = &n;
-    try expect(!(x1 == null));
-    try expect(!(null == x1));
-    try expect(x1 != null);
-    try expect(null != x1);
-    try expect(x1.?.* == 1234);
-    if (x1) |same_x1| {
-        try expect(same_x1.* == 1234);
-    } else {
-        @panic("fail");
-    }
-    try expect((x1 orelse &otherx) == x1);
-
-    const nc: i32 = 1234;
-    const y1: [*c]const i32 = &nc;
-    comptime try expect(!(y1 == null));
-    comptime try expect(!(null == y1));
-    comptime try expect(y1 != null);
-    comptime try expect(null != y1);
-    comptime try expect(y1.?.* == 1234);
-    if (y1) |same_y1| {
-        try expect(same_y1.* == 1234);
-    } else {
-        @compileError("fail");
-    }
-    comptime try expect((y1 orelse &othery) == y1);
-}
-
-test "null terminated pointer" {
-    const S = struct {
-        fn doTheTest() !void {
-            var array_with_zero = [_:0]u8{ 'h', 'e', 'l', 'l', 'o' };
-            var zero_ptr: [*:0]const u8 = @ptrCast([*:0]const u8, &array_with_zero);
-            var no_zero_ptr: [*]const u8 = zero_ptr;
-            var zero_ptr_again = @ptrCast([*:0]const u8, no_zero_ptr);
-            try expect(std.mem.eql(u8, std.mem.spanZ(zero_ptr_again), "hello"));
-        }
-    };
-    try S.doTheTest();
-    comptime try S.doTheTest();
-}
-
-test "allow any sentinel" {
-    const S = struct {
-        fn doTheTest() !void {
-            var array = [_:std.math.minInt(i32)]i32{ 1, 2, 3, 4 };
-            var ptr: [*:std.math.minInt(i32)]i32 = &array;
-            try expect(ptr[4] == std.math.minInt(i32));
-        }
-    };
-    try S.doTheTest();
-    comptime try S.doTheTest();
-}
-
-test "pointer sentinel with enums" {
-    const S = struct {
-        const Number = enum {
-            one,
-            two,
-            sentinel,
-        };
-
-        fn doTheTest() !void {
-            var ptr: [*:.sentinel]const Number = &[_:.sentinel]Number{ .one, .two, .two, .one };
-            try expect(ptr[4] == .sentinel); // TODO this should be comptime try expect, see #3731
-        }
-    };
-    try S.doTheTest();
-    comptime try S.doTheTest();
-}
-
-test "pointer sentinel with optional element" {
-    const S = struct {
-        fn doTheTest() !void {
-            var ptr: [*:null]const ?i32 = &[_:null]?i32{ 1, 2, 3, 4 };
-            try expect(ptr[4] == null); // TODO this should be comptime try expect, see #3731
-        }
-    };
-    try S.doTheTest();
-    comptime try S.doTheTest();
-}
-
-test "pointer sentinel with +inf" {
-    const S = struct {
-        fn doTheTest() !void {
-            const inf = std.math.inf_f32;
-            var ptr: [*:inf]const f32 = &[_:inf]f32{ 1.1, 2.2, 3.3, 4.4 };
-            try expect(ptr[4] == inf); // TODO this should be comptime try expect, see #3731
-        }
-    };
-    try S.doTheTest();
-    comptime try S.doTheTest();
-}
-
-test "pointer to array at fixed address" {
-    const array = @intToPtr(*volatile [1]u32, 0x10);
-    // Silly check just to reference `array`
-    try expect(@ptrToInt(&array[0]) == 0x10);
-}
-
-test "pointer arithmetic affects the alignment" {
-    {
-        var ptr: [*]align(8) u32 = undefined;
-        var x: usize = 1;
-
-        try expect(@typeInfo(@TypeOf(ptr)).Pointer.alignment == 8);
-        const ptr1 = ptr + 1; // 1 * 4 = 4 -> lcd(4,8) = 4
-        try expect(@typeInfo(@TypeOf(ptr1)).Pointer.alignment == 4);
-        const ptr2 = ptr + 4; // 4 * 4 = 16 -> lcd(16,8) = 8
-        try expect(@typeInfo(@TypeOf(ptr2)).Pointer.alignment == 8);
-        const ptr3 = ptr + 0; // no-op
-        try expect(@typeInfo(@TypeOf(ptr3)).Pointer.alignment == 8);
-        const ptr4 = ptr + x; // runtime-known addend
-        try expect(@typeInfo(@TypeOf(ptr4)).Pointer.alignment == 4);
-    }
-    {
-        var ptr: [*]align(8) [3]u8 = undefined;
-        var x: usize = 1;
-
-        const ptr1 = ptr + 17; // 3 * 17 = 51
-        try expect(@typeInfo(@TypeOf(ptr1)).Pointer.alignment == 1);
-        const ptr2 = ptr + x; // runtime-known addend
-        try expect(@typeInfo(@TypeOf(ptr2)).Pointer.alignment == 1);
-        const ptr3 = ptr + 8; // 3 * 8 = 24 -> lcd(8,24) = 8
-        try expect(@typeInfo(@TypeOf(ptr3)).Pointer.alignment == 8);
-        const ptr4 = ptr + 4; // 3 * 4 = 12 -> lcd(8,12) = 4
-        try expect(@typeInfo(@TypeOf(ptr4)).Pointer.alignment == 4);
-    }
-}
-
-test "@ptrToInt on null optional at comptime" {
-    {
-        const pointer = @intToPtr(?*u8, 0x000);
-        const x = @ptrToInt(pointer);
-        _ = x;
-        comptime try expect(0 == @ptrToInt(pointer));
-    }
-    {
-        const pointer = @intToPtr(?*u8, 0xf00);
-        comptime try expect(0xf00 == @ptrToInt(pointer));
-    }
-}
-
-test "indexing array with sentinel returns correct type" {
-    var s: [:0]const u8 = "abc";
-    try testing.expectEqualSlices(u8, "*const u8", @typeName(@TypeOf(&s[0])));
-}