Index: parse.py ================================================================== --- parse.py +++ parse.py @@ -8,10 +8,11 @@ "BASENOTE", "ACCIDENTAL", "REST", "OCTAVE", "CHORD_TYPE", + "QUOTE", ) t_ignore = " |" #t_BASENOTE = r"[A-Ga-g]" @@ -18,10 +19,11 @@ t_BASENOTE = r"I+V?|VI*|i+v?|vi*" t_ACCIDENTAL = r"\^{1,2}|_{1,2}|=" t_REST = r"z" t_OCTAVE = r"'+|,+" t_CHORD_TYPE = r"m|7|m7|0|o|\+|mb5|sus|sus4|maj7|mmaj7|7sus4|dim|dim7|7b5|m7b5|6|b6|m6|mb6|46|maj9|9|add9|7b9|m9" +t_QUOTE = '"' def t_NOTE_LENGTH(t): r"/?\d+" multiplier = float(t.value.strip("/")) if t.value.startswith("/"): @@ -34,35 +36,46 @@ lex.lex() #lex.input("GFG B'AB,, | g/2fg gab | GFG BAB | d2A AFD") #s = "GFG B'AB,, | g/2fg gab | GFG BAB | d2A AFD" -s = "I IV V VI I" +s = '''I IV V VI I "I" "ii"''' #s = "GF_G,/2" lex.input(s) for tok in iter(lex.token, None): print repr(tok.type), repr(tok.value) # Parse (yacc) -class Note(object): +class Note(): def __init__(self, value, duration=.25, octave=8): self.value = value self.duration = duration self.octave = octave self.accidental = None def __repr__(self): return "Note %s %s %s" % (self.value, self.duration, self.octave) + +class Chord(): + def __init__(self, value, duration=.25, chord_type="major"): + self.value = value + self.duration = duration + self.chord_type = chord_type + def __repr__(self): + return "Chord %s %s %s" % (self.value, self.duration, self.chord_type) + def p_pitch_list(p): '''score : score note + score : score chord ''' p[0] = p[1] + [p[2]] def p_score(p): '''score : note + score : chord ''' p[0] = [p[1]] def p_note(p): @@ -75,10 +88,20 @@ ''' note : note NOTE_LENGTH ''' new_note = p[1] new_note.duration = p[2] p[0] = new_note + + +def p_chord(p): + '''chord : QUOTE pitch QUOTE + | QUOTE pitch CHORD_TYPE QUOTE + ''' + p[0] = Chord(value=p[2].value) + if len(p) > 3: + p[0].chord_type = p[3] + def p_accidental(p): '''pitch : ACCIDENTAL pitch ''' p[2].accidental = p[1]