Constants may contain both alphanumeric characters and underscores. Numbers are permitted in constant names.
All letters used in a constant name must be capitalized, while all words in a constant name must be separated by underscore characters.
For example, EMBED_SUPPRESS_EMBED_EXCEPTION is permitted but
EMBED_SUPPRESSEMBEDEXCEPTION is not.
Constants must be defined as class members with the "const" modifier. Defining constants in the global scope with the "define" function is permitted but strongly discouraged.