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48 lines
1.9 KiB
48 lines
1.9 KiB
from misc.expression import Token, Expression
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from lib.Pile import Pile_chaine as Pile
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from lib.File import File_chaine as File
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def shutting_yard(tokens: list) -> File:
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output = File()
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opertator = Pile()
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for token in tokens:
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if token.type == Token.NUMBER:
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output.enfiler(token)
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elif token.type == Token.FUNCTION:
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opertator.empiler(token)
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elif token.type == Token.OPERATOR:
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while (not opertator.est_vide() and opertator.sommet().val != "(") and (Token.getPrecedence(opertator.sommet().val) > Token.getPrecedence(token.val) or (Token.getPrecedence(token.val) == Token.getPrecedence(opertator.sommet().val) and token.val != "^")):
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output.enfiler(opertator.depiler())
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opertator.empiler(token)
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elif token.val == "(":
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opertator.empiler(token)
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elif token.val == ")":
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while not opertator.est_vide() and opertator.sommet().val != "(":
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assert not opertator.est_vide()
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output.enfiler(opertator.depiler())
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assert opertator.sommet().val == "("
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opertator.depiler()
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if opertator.sommet().type == Token.FUNCTION:
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output.enfiler(opertator.depiler())
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while not opertator.est_vide():
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assert opertator.sommet().val != "("
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output.enfiler(opertator.depiler())
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return output
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def npi2tree(tokens: File) -> Expression:
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pile = Pile()
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while not tokens.est_vide():
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token = tokens.defiler()
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if token.type == Token.OPERATOR:
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a, b = pile.depiler(), pile.depiler()
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t = ((a, b) if token.val != "^" else (b, a))
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exp = Expression(token.val, *t)
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pile.empiler(exp)
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elif token.type == Token.FUNCTION:
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exp = Expression(token.val, pile.depiler(), None)
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pile.empiler(exp)
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else:
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pile.empiler(Expression(token.val))
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return pile.depiler()
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