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#!/usr/bin/env python
import tree
from ply import lex, yacc
class Note():
def __init__(self, value, duration=.25, octave=8):
self.value = value
self.duration = duration
self.octave = octave
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"NOTE_LENGTH",
"BASENOTE",
"ACCIDENTAL",
"REST",
"OCTAVE",
"CHORD_TYPE",
"QUOTE",
"NODE",
)
t_ignore = " |"
#t_BASENOTE = r"[A-Ga-g]"
# t_BASENOTE = r"I+V?|VI*|i+v?|vi*"
t_BASENOTE = r"[A-Ga-g]"
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_NODE = r"([a-zA-Z0-9_-]+)"
def t_NOTE_LENGTH(t):
r"/?\d+"
multiplier = float(t.value.strip("/"))
if t.value.startswith("/"):
multiplier = 1/multiplier
t.value = multiplier
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# Parse (yacc)
def p_pitch_list(p):
'''score : score note
| score chord
| score rest
| score node
'''
p[0] = p[1] + [p[2]]
def p_score(p):
'''score : note
| chord
| rest
| node
'''
p[0] = [p[1]]
def p_note(p):
'''note : pitch
'''
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def p_rest(p):
''' rest : REST
| REST NOTE_LENGTH
'''
p[0] = Rest()
if len(p) > 2:
p[0].duration = p[2]
def node(p):
'''node: NODE
'''
p[0] = tree.tree(node.strip("(").strip(")"))
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)
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