zig/doc/langref/test_field_builtin.zig

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Zig

const std = @import("std");
const Point = struct {
x: u32,
y: u32,
pub var z: u32 = 1;
};
test "field access by string" {
const expect = std.testing.expect;
var p = Point{ .x = 0, .y = 0 };
@field(p, "x") = 4;
@field(p, "y") = @field(p, "x") + 1;
try expect(@field(p, "x") == 4);
try expect(@field(p, "y") == 5);
}
test "decl access by string" {
const expect = std.testing.expect;
try expect(@field(Point, "z") == 1);
@field(Point, "z") = 2;
try expect(@field(Point, "z") == 2);
}
// test