def __while(self):
self.__eat(token.WHILE)
while_stmt_node = ast.WhileStmt()
while_stmt_node.bool_expr = self.__bexpr()
self.__eat(token.DO)
while_stmt_node.stmt_list = self.__bstmts(ast.StmtList())
self.__eat(token.END)
return while_stmt_node
def while_statement(self):
if self.currtok[0] == "KWDWHILE":
self.currtok = next(self.tokens)
if self.currtok[0] == "PCTLPAR":
self.currtok = next(self.tokens)
cond = self.expression()
if self.currtok[0] == "PCTRPAR":
self.currtok = next(self.tokens)
stmt = self.statement()
ast.indent_level -= 1
return ast.WhileStmt(cond, stmt)
else:
raise CLiteSyntaxError("Right parenthesis expected",
self.currtok[1])
else:
raise CLiteSyntaxError("Left parenthesis expected",
self.currtok[1])
else:
raise CLiteSyntaxError("While keyword expected", self.currtok[1])
def p_whilestmt(p):
'''whilestmt : TKWHILE '(' cond_expr ')' block'''
p[0] = ast.WhileStmt(p[3], p[5]).addloc(p.lineno(1))
def p_stmt_while(p):
'stmt : WHILE LPAREN expr RPAREN stmt'
p[0] = ast.WhileStmt(p[3], p[5], p.lineno(1))
def p_while_stmt_do(p):
'''while_stmt : DO simple_instr WHILE bool_expr'''
p[0] = ast.WhileStmt(p[4], p[2], do_while=True)
def p_while_stmt(p):
'''while_stmt : WHILE bool_expr DO simple_instr'''
p[0] = ast.WhileStmt(p[2], p[4])