Mercurial > repo
view ply-3.8/test/yacc_notfunc.py @ 8650:4337d7793b19
<izabera> ` echo \'f="$(find wisdom -ipath "wisdom/*$1*" -type f -print0 | shuf -z -n1); echo -n "${f#wisdom/}//" | rnooooooodl; rnoooooooodl < "$f"\' > bin/wisdom
author | HackBot |
---|---|
date | Wed, 29 Jun 2016 00:26:03 +0000 |
parents | 343ff337a19b |
children |
line wrap: on
line source
# ----------------------------------------------------------------------------- # yacc_notfunc.py # # p_rule not defined as a function # ----------------------------------------------------------------------------- import sys if ".." not in sys.path: sys.path.insert(0,"..") import ply.yacc as yacc from calclex import tokens # Parsing rules precedence = ( ('left','PLUS','MINUS'), ('left','TIMES','DIVIDE'), ('right','UMINUS'), ) # dictionary of names names = { } p_statement_assign = "Blah" def p_statement_expr(t): 'statement : expression' print(t[1]) def p_expression_binop(t): '''expression : expression PLUS expression | expression MINUS expression | expression TIMES expression | expression DIVIDE expression''' if t[2] == '+' : t[0] = t[1] + t[3] elif t[2] == '-': t[0] = t[1] - t[3] elif t[2] == '*': t[0] = t[1] * t[3] elif t[2] == '/': t[0] = t[1] / t[3] def p_expression_uminus(t): 'expression : MINUS expression %prec UMINUS' t[0] = -t[2] def p_expression_group(t): 'expression : LPAREN expression RPAREN' t[0] = t[2] def p_expression_number(t): 'expression : NUMBER' t[0] = t[1] def p_expression_name(t): 'expression : NAME' try: t[0] = names[t[1]] except LookupError: print("Undefined name '%s'" % t[1]) t[0] = 0 def p_error(t): print("Syntax error at '%s'" % t.value) yacc.yacc()