def parse(self, t):
self.__line_number = t.currentToken().line_number
self.__id = IdNode.parse(t)
if t.currentToken().value == SPECIAL_SYMBOLS[","]:
match_consume(",", t)
self.__id_list = IdListNode()
self.__id_list.parse(t)
def parse(self, t):
self.__line_number = t.currentToken().line_number
self.__fac.parse(t)
if t.currentToken().value == SPECIAL_SYMBOLS["*"]:
match_consume("*", t)
self.__t = TermNode()
self.__t.parse(t)
def parse(self, t):
self.__line_number = t.currentToken().line_number
if t.currentToken().key not in symbol_table:
report_error_undeclared_identifier(t)
self.__id = symbol_table[t.currentToken().key]
t.nextToken()
match_consume("=", t)
self.__exp.parse(t)
match_consume(";", t)
def parse(self, t):
self.__line_number = t.currentToken().line_number
match_consume("if", t)
self.__cond.parse(t)
match_consume("then", t)
self.__ss_true.parse(t)
if t.currentToken().value == RESERVED_WORDS["else"]:
match_consume("else", t)
from Nodes.StatementSequenceNode import StatementSequenceNode
self.__ss_false = StatementSequenceNode()
self.__ss_false.parse(t)
match_consume("end", t)
match_consume(";", t)
def parse(self, t):
self.__line_number = t.currentToken().line_number
if t.currentToken().value == TOKEN_VALUE_INTEGER:
self.__int = int(t.currentToken().key)
t.nextToken()
self.__alt = 1
elif t.currentToken().value == TOKEN_VALUE_IDENTIFIER:
self.__id = symbol_table[t.currentToken().key]
t.nextToken()
self.__alt = 2
elif t.currentToken().value == SPECIAL_SYMBOLS["("]:
match_consume("(", t)
from Nodes.ExpressionNode import ExpressionNode
self.__exp = ExpressionNode()
self.__exp.parse(t)
match_consume(")", t)
self.__alt = 3
else:
report_error_expected_expresion(t)
def parse(self, t):
self.__line_number = t.currentToken().line_number
match_consume("program", t)
self.__ds.parse(t)
match_consume("begin", t)
self.__ss.parse(t)
match_consume("end", t)
if t.currentToken().value != TOKEN_VALUE_EOF:
report_error_expected_eof(t)
def parse(self, t):
self.__line_number = t.currentToken().line_number
if t.currentToken().value == SPECIAL_SYMBOLS["("]:
self.__comp = ComparisonNode()
self.__comp.parse(t)
self.__alt = 1
elif t.currentToken().value == SPECIAL_SYMBOLS["!"]:
match_consume("!", t)
self.__cond1 = ConditionNode()
self.__cond1.parse(t)
self.__alt = 2
elif t.currentToken().value == SPECIAL_SYMBOLS["["]:
match_consume("[", t)
self.__cond1 = ConditionNode()
self.__cond1.parse(t)
if t.currentToken().value == RESERVED_WORDS["and"]:
match_consume("and", t)
self.__alt = 3
else: # or
match_consume("or", t)
self.__alt = 4
self.__cond2 = ConditionNode()
self.__cond2.parse(t)
match_consume("]", t)
def parse(self, t):
self.__line_number = t.currentToken().line_number
match_consume("read", t)
self.__id_list.parse(t)
match_consume(";", t)
def parse(self, t):
self.__line_number = t.currentToken().line_number
match_consume("(", t)
self.__fac1.parse(t)
if t.currentToken().value == SPECIAL_SYMBOLS["!="]:
match_consume("!=", t)
self.__alt = 1
elif t.currentToken().value == SPECIAL_SYMBOLS["=="]:
match_consume("==", t)
self.__alt = 2
elif t.currentToken().value == SPECIAL_SYMBOLS["<"]:
match_consume("<", t)
self.__alt = 3
elif t.currentToken().value == SPECIAL_SYMBOLS[">"]:
match_consume(">", t)
self.__alt = 4
elif t.currentToken().value == SPECIAL_SYMBOLS["<="]:
match_consume("<=", t)
self.__alt = 5
elif t.currentToken().value == SPECIAL_SYMBOLS[">="]:
match_consume(">=", t)
self.__alt = 6
self.__fac2.parse(t)
match_consume(")", t)