std.StaticStringMap infered type breaking change

Sze · September 16, 2025, 3:43pm

Hmm looking at this

lib/std/zig/BuiltinFn.zig

496313a1b


      
          /// `true` if the builtin call can be the left-hand side of an expression (assigned to).
          allows_lvalue: bool = false,
          /// `true` if builtin call is not available outside function scope
          illegal_outside_function: bool = false,
          /// The number of parameters to this builtin function. `null` means variable number
          /// of parameters.
          param_count: ?u8,
          
          pub const list = list: {
              @setEvalBranchQuota(3000);
              break :list std.StaticStringMap(BuiltinFn).initComptime([_]struct { []const u8, BuiltinFn }{
                  .{
                      "@addWithOverflow",
                      .{
                          .tag = .add_with_overflow,
                          .param_count = 2,
                      },
                  },
                  .{
                      "@addrSpaceCast",
                      .{

It seems like the easier option is to just leave StaticStringMap the way it is and use an explicit array type, so @nm-remarkable’s example would become:

const presetMap = std.StaticStringMap(std.Target.Query).initComptime([_]struct{[]const u8, std.Target.Query}{
    .{ "arm-linux", .{ .cpu_arch = .aarch64, .os_tag = .linux } },
    .{ "native", .{} },
    .{ "linux", .{ .cpu_arch = .x86_64, .os_tag = .linux } }, // to be used for wsl on windows
});