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test_comptime_variables.zig (450B) - Raw

      1 const std = @import("std");
      2 const expect = std.testing.expect;
      3 
      4 test "comptime vars" {
      5     var x: i32 = 1;
      6     comptime var y: i32 = 1;
      7 
      8     x += 1;
      9     y += 1;
     10 
     11     try expect(x == 2);
     12     try expect(y == 2);
     13 
     14     if (y != 2) {
     15         // This compile error never triggers because y is a comptime variable,
     16         // and so `y != 2` is a comptime value, and this if is statically evaluated.
     17         @compileError("wrong y value");
     18     }
     19 }
     20 
     21 // test