Translator – Reference Flag Implementation

For non-parentheses tokens, only the NoParen and DefFuncN token types should have the reference flag set. The NoParen token type includes a possible variable or user function with no arguments. The reference flag should not be set for internal functions with no arguments (IntFuncN) or constants. At the moment it's unclear if the reference flag should be set for defined functions with no arguments (DefFuncN). Intuition says that the reference flag should be set since the DEF command line is similar to an assignment statement.

For parentheses tokens, only the Paren (an array or user function with arguments) and DefFuncP token types should have the reference flag set. For now the reference flag will be set for define functions with arguments (same reason as above). The reference flag should not be set for internal functions with arguments (IntFuncP). However, with that said (and this is jumping ahead a bit), some internal functions, namely string functions, could be references. Specifically the MID$ function, which could be used to assign a part of a string. This will be implemented later when data type handling and string handling is added.

Lastly, in the test code that outputs the tokens, a “<ref>” will be output after the token if the reference flag of a token is set. This check will be made for all token types just to make sure it is not getting set when it's not supposed to.