v0.3.0-alpha

• v0.3.0-alpha:

• new Parser class, supporting new operators, parentheses and user-defined functions;
• fix parsing of expressions X-Y-Z evaluated X-(Y-Z);
• new Help text;
• String arguments;
• INCLUDE/COPY files;
• fix quote processing in split();
• new Log class for messages;
• new option -NC: no compatibility warnings;
• new option -ND-: enable debug messages;
• new option -NW: no warnings;
• symbols can be EQUated to Rnn and Pnn;
• display total # of warnings;
• new IF / ELSE / ENDIF and synonyms;
• user-defined functions name FUNCTION/FUNC arg,expression;
• new SAVE / RESTORE options;
• new LISTING ON/OFF: enable/disable listing;
• new DB nn,'text',... / DS nnnn / DB nnnn DUP(nn) / DW nnnn,...
• fix NOP op-code;
• fix DJNZ A/B,offset wrong offset value;
• fix TRAP n op-codes (reversed);
• new ERROR / WARNING / INFO / DEBUG messages;
• new ASSERT_EQUAL x,y: raise an error if x is not equal to y.