#pragma

#pragma toggles per-file compiler flags. Each flag has a positive form and a no_-prefixed negative form (#pragma no_warnings), and applies from the directive to the end of the file being compiled. An unrecognized pragma is a warning, not an error.

Pragma	Effect
strict_types	Enforce strict type checking: functions must declare return types, and calls/assignments are type-checked. Strongly recommended for all new code.
warnings	Enable compiler warnings (no_warnings silences them for the rest of the file).
save_types	Keep the type information of the program after compilation, so objects inheriting it can type-check calls into it.
optimize	Enable extra tree optimization for this file.
show_error_context	Legacy flag (on by default). It predates the clang-style diagnostics, which already show source context, so it no longer changes how compiler diagnostics are rendered (see diagnostics).

#pragma strict_types
#pragma no_warnings