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const std = @import("std");
const expect = std.testing.expect;
test "comptime vars" {
var x: i32 = 1;
comptime var y: i32 = 1;
x += 1;
y += 1;
expect(x == 2);
expect(y == 2);
if (y != 2) {
// this compile error never triggers. y is a comptime variable, which
// makes `y != 2` knowable at comptime (would we call this a comptime
// expression?). the "if" statement is statically evaluated. I don't
// get it.
@compileError("wrong y value");
}
}