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# This is @generated code; do not edit!
from token import NAME, NUMBER, STRING, NEWLINE, ENDMARKER
from story5.memo import memoize, memoize_left_rec
from story5.node import Node
from story5.parser import Parser
class ToyParser(Parser):
@memoize
def start(self):
self.show_rule('start', [['statements', 'ENDMARKER']])
pos = self.mark()
if (True
and self.show_index(0, 0)
and (statements := self.statements())
and self.show_index(0, 1)
and (endmarker := self.expect(ENDMARKER))
):
self.show_index(0, 0, 2)
return Node('start', [statements, endmarker])
self.reset(pos)
self.show_index(0, 0, 0)
return None
@memoize
def statements(self):
self.show_rule('statements', [['statement', 'NEWLINE', 'statements'], ['statement', 'NEWLINE']])
pos = self.mark()
if (True
and self.show_index(0, 0)
and (statement := self.statement())
and self.show_index(0, 1)
and (newline := self.expect(NEWLINE))
and self.show_index(0, 2)
and (statements := self.statements())
):
self.show_index(0, 0, 3)
return Node('statements', [statement, newline, statements])
self.reset(pos)
if (True
and self.show_index(1, 0)
and (statement := self.statement())
and self.show_index(1, 1)
and (newline := self.expect(NEWLINE))
):
self.show_index(1, 0, 2)
return Node('statements', [statement, newline])
self.reset(pos)
self.show_index(0, 0, 0)
return None
@memoize
def statement(self):
self.show_rule('statement', [['if_statement'], ['assignment'], ['expr']])
pos = self.mark()
if (True
and self.show_index(0, 0)
and (if_statement := self.if_statement())
):
self.show_index(0, 0, 1)
return Node('statement', [if_statement])
self.reset(pos)
if (True
and self.show_index(1, 0)
and (assignment := self.assignment())
):
self.show_index(1, 0, 1)
return Node('statement', [assignment])
self.reset(pos)
if (True
and self.show_index(2, 0)
and (expr := self.expr())
):
self.show_index(2, 0, 1)
return Node('statement', [expr])
self.reset(pos)
self.show_index(0, 0, 0)
return None
@memoize_left_rec
def expr(self):
self.show_rule('*' + 'expr', [['expr', "'+'", 'term'], ['expr', "'-'", 'term'], ['term']])
pos = self.mark()
if (True
and self.show_index(0, 0)
and (expr := self.expr())
and self.show_index(0, 1)
and self.expect('+')
and self.show_index(0, 2)
and (term := self.term())
):
self.show_index(0, 0, 3)
return Node('expr', [expr, term])
self.reset(pos)
if (True
and self.show_index(1, 0)
and (expr := self.expr())
and self.show_index(1, 1)
and self.expect('-')
and self.show_index(1, 2)
and (term := self.term())
):
self.show_index(1, 0, 3)
return Node('expr', [expr, term])
self.reset(pos)
if (True
and self.show_index(2, 0)
and (term := self.term())
):
self.show_index(2, 0, 1)
return Node('expr', [term])
self.reset(pos)
self.show_index(0, 0, 0)
return None
@memoize_left_rec
def term(self):
self.show_rule('*' + 'term', [['term', "'*'", 'atom'], ['term', "'/'", 'atom'], ['atom']])
pos = self.mark()
if (True
and self.show_index(0, 0)
and (term := self.term())
and self.show_index(0, 1)
and self.expect('*')
and self.show_index(0, 2)
and (atom := self.atom())
):
self.show_index(0, 0, 3)
return Node('term', [term, atom])
self.reset(pos)
if (True
and self.show_index(1, 0)
and (term := self.term())
and self.show_index(1, 1)
and self.expect('/')
and self.show_index(1, 2)
and (atom := self.atom())
):
self.show_index(1, 0, 3)
return Node('term', [term, atom])
self.reset(pos)
if (True
and self.show_index(2, 0)
and (atom := self.atom())
):
self.show_index(2, 0, 1)
return Node('term', [atom])
self.reset(pos)
self.show_index(0, 0, 0)
return None
@memoize
def atom(self):
self.show_rule('atom', [['NAME'], ['NUMBER'], ["'('", 'expr', "')'"]])
pos = self.mark()
if (True
and self.show_index(0, 0)
and (name := self.expect(NAME))
):
self.show_index(0, 0, 1)
return Node('atom', [name])
self.reset(pos)
if (True
and self.show_index(1, 0)
and (number := self.expect(NUMBER))
):
self.show_index(1, 0, 1)
return Node('atom', [number])
self.reset(pos)
if (True
and self.show_index(2, 0)
and self.expect('(')
and self.show_index(2, 1)
and (expr := self.expr())
and self.show_index(2, 2)
and self.expect(')')
):
self.show_index(2, 0, 3)
return Node('atom', [expr])
self.reset(pos)
self.show_index(0, 0, 0)
return None
@memoize
def assignment(self):
self.show_rule('assignment', [['target', "'='", 'expr']])
pos = self.mark()
if (True
and self.show_index(0, 0)
and (target := self.target())
and self.show_index(0, 1)
and self.expect('=')
and self.show_index(0, 2)
and (expr := self.expr())
):
self.show_index(0, 0, 3)
return Node('assignment', [target, expr])
self.reset(pos)
self.show_index(0, 0, 0)
return None
@memoize
def target(self):
self.show_rule('target', [['NAME']])
pos = self.mark()
if (True
and self.show_index(0, 0)
and (name := self.expect(NAME))
):
self.show_index(0, 0, 1)
return Node('target', [name])
self.reset(pos)
self.show_index(0, 0, 0)
return None
@memoize
def if_statement(self):
self.show_rule('if_statement', [["'if'", 'expr', "':'", 'statement']])
pos = self.mark()
if (True
and self.show_index(0, 0)
and self.expect('if')
and self.show_index(0, 1)
and (expr := self.expr())
and self.show_index(0, 2)
and self.expect(':')
and self.show_index(0, 3)
and (statement := self.statement())
):
self.show_index(0, 0, 4)
return Node('if_statement', [expr, statement])
self.reset(pos)
self.show_index(0, 0, 0)
return None
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