@@ -17,11 +17,10 @@ self.chord_type = chord_type self.octave = octave def __repr__(self): return "Chord %s %s %s" % (self.value, self.duration, self.chord_type, self.octave) - class Rest(): def __init__(self, duration=.25): self.duration = duration def __repr__(self): return "Rest node %s" % self.duration @@ -34,11 +33,12 @@ "BASENOTE", "ACCIDENTAL", "REST", "OCTAVE", "CHORD_TYPE", - "QUOTE", + "PAREN", + "SYNCOPATE", ) t_ignore = " |" #t_BASENOTE = r"[A-Ga-g]" @@ -45,11 +45,12 @@ 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 = '"' + t_PAREN = "\(|\)" + t_SYNCOPATE = "\+|-" def t_NOTE_LENGTH(t): r"/?\d+" multiplier = float(t.value.strip("/")) if t.value.startswith("/"): @@ -59,92 +60,85 @@ def t_error(t): raise TypeError("Unknown text '%s'" % (t.value,)) 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 "I" "ii"/2''' - #s = "GF_G,/2" lex.input(score) - #for tok in iter(lex.token, None): - # print repr(tok.type), repr(tok.value) # Parse (yacc) - - def p_pitch_list(p): + def p_note_list(p): '''score : score note - | score chord - | score rest + | score chord + | score rest ''' p[0] = p[1] + [p[2]] def p_score(p): '''score : note - | chord - | rest + | chord + | rest ''' p[0] = [p[1]] - def p_note(p): - '''note : pitch + def p_chord_length(p): + ''' chord : chord NOTE_LENGTH ''' - p[0] = p[1] + new_note = p[1] + new_note.duration = p[2] + p[0] = new_note def p_note_length(p): ''' note : note NOTE_LENGTH ''' new_note = p[1] new_note.duration = p[2] p[0] = new_note - def p_chord_length(p): - ''' chord : chord 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 + '''chord : PAREN note PAREN + | PAREN note CHORD_TYPE PAREN ''' pitch = p[2].value pitch = pitch.upper() p[0] = Chord(value=pitch, octave=default_octave) if len(p) > 3: p[0].chord_type = p[3] + + def p_note_syncopate(p): + ''' note : note SYNCOPATE + ''' + note.syncopate = p[2] + def p_accidental(p): - '''pitch : ACCIDENTAL pitch + '''note : ACCIDENTAL note ''' p[2].accidental = p[1] p[0] = p[2] - def p_pitch_octave(p): - '''pitch : pitch OCTAVE + def p_octave(p): + '''note : note OCTAVE ''' count = len(p[2]) increment_or_decrement = 1 if p[2].startswith("'") else -1 p[1].octave += (count * increment_or_decrement) p[0] = p[1] - def p_pitch(p): - '''pitch : BASENOTE + def p_note(p): + '''note : BASENOTE ''' p[0] = Note(p[1], octave=default_octave) def p_rest(p): ''' rest : REST - | REST NOTE_LENGTH + | REST NOTE_LENGTH ''' p[0] = Rest() if len(p) > 2: p[0].duration = p[2] @@ -151,7 +145,6 @@ def p_error(p): raise Exception("Syntax error at '%s' of element type %s" % (p.value, p.type)) yacc.yacc() - #print yacc.parse("GFG B'AB,, | g/2fg gab | GFG BAB | d2A AFD") return yacc.parse(score)