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#!/usr/bin/python
# --------------------------------------
# sgyacc.py
""" Parser for SGF """
# --------------------------------------
import ply.yacc as yacc
from imago.sgfParser.sgflex import tokens
from imago.sgfParser.astNode import ASTNode, Property
def p_tree(p):
'''tree : LPAREN node RPAREN
| LPAREN tree RPAREN'''
p[0] = p[2]
def p_node_sequence(p):
'''node : node node'''
p[1].addToSequence(p[2])
p[0] = p[1]
def p_node_tree(p):
'''node : node tree'''
p[1].children.append(p[2])
p[0] = p[1]
def p_node(p):
'node : SCOLON'
p[0] = ASTNode()
def p_node_prop(p):
'node : node property'
p[1].props[p[2].name] = p[2].value
p[0] = p[1]
def p_property(p):
'property : PROPID PROPVALUE'
p[0] = Property(p[1], p[2])
def p_property_value(p):
'property : property PROPVALUE'
p[1].addValue(p[2])
p[0] = p[1]
def p_error(_):
"""Error rule for syntax errors"""
print("Syntax error in input!")
def main():
# Build the parser
parser = yacc.yacc()
s = ""
while True:
try:
s = input('calc > ')
except EOFError:
break
if not s:
continue
result = parser.parse(s)
print(result.toString())
if __name__ == '__main__':
main()
|
