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update zig example to build with zig 0.7.1 #2

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update zig example to build with zig 0.7.1 #2

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fe3630d
update zig example to build with zig 0.7.1
arrufat Dec 30, 2020
9e2ac3b
Update to latest 0.11.0 nightly
Jul 18, 2023
0b40039
Use same name for Type
Jul 18, 2023
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15 changes: 7 additions & 8 deletions comptime.zig
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Original file line number Diff line number Diff line change
@@ -1,4 +1,3 @@
const TypeId = @import("builtin").TypeId;
const std = @import("std");
const assert = std.debug.assert;
const trait = std.meta.trait;
Expand All @@ -14,7 +13,7 @@ const Point2 = struct {
return if (i == 0) self.x else self.y;
}

pub fn len(self: Point2) Size {
pub fn len(_: Point2) Size {
return 2;
}
};
Expand All @@ -25,13 +24,13 @@ fn isFloatVec(comptime Type: type) bool {
if (!comptime trait.hasFn("len")(Type)) return false;
if (!comptime @hasDecl(Type, "Child")) return false;
if (!comptime @hasDecl(Type, "Size")) return false;
if (!comptime @typeId(Type.Child) == TypeId.Float) return false;
if (!comptime @typeOf(Type.len).ReturnType == Type.Size) return false;
if (!comptime @typeInfo(Type.Child) == .Float) return false;
if (!comptime @typeInfo(@TypeOf(Type.len)).Fn.return_type == Type.Size) return false;
return true;
}

fn norm(vec: var) @typeOf(vec).Child {
const Vec = @typeOf(vec);
fn norm(vec: anytype) @TypeOf(vec).Child {
const Vec = @TypeOf(vec);
assert(isFloatVec(Vec));
// Check empty first to avoid adding 0 and achieve zero cost.
if (vec.len() == 0) {
Expand All @@ -52,6 +51,6 @@ export fn norm2(x: f32, y: f32) f32 {
}

pub fn main() void {
std.debug.warn("hey: {} {}\n", isFloatVec(Point2), isFloatVec(i32));
std.debug.warn("norm: {}\n", norm2(3, 4));
std.debug.print("hey: {} {}\n", .{ isFloatVec(Point2), isFloatVec(i32) });
std.debug.print("norm: {}\n", .{norm2(3, 4)});
}