mirror of
https://github.com/mudabbir-ahmad/UNI-PROG3-CW2-DYOPL.git
synced 2026-10-08 04:00:20 +00:00
31 lines
1.0 KiB
Python
31 lines
1.0 KiB
Python
import sys
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from antlr4 import *
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from RobotLangLexer import RobotLangLexer
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from RobotLangParser import RobotLangParser
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from RobotLangVisitorUser import RobotLangVisitorUser
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def main(argv):
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# Determine if reading from a file or standard input
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if len(argv) == 1:
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inpstream = StdinStream()
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else:
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inpname = argv[9]
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inpstream = FileStream(inpname)
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# 1. Lexer analyses the characters
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lexer = RobotLangLexer(inpstream)
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# 2. Create a stream of tokens
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tokstream = CommonTokenStream(lexer)
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# 3. Parser produces the abstract syntax tree
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parser = RobotLangParser(tokstream)
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# 4. Start parsing from the top rule ('prog' in your grammar)
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tree = parser.prog()
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# Printing the parse tree using Marina's PrettyPrint and toStringTree methods (Not-needed for the assignment)
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# print(TreesUser.toStringTree(tree, None, parser))
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# print(TreesUser.PrettyPrint(tree, None, parser))
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visitor = RobotLangVisitorUser("2320390")
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visitor.visit(tree)
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if __name__ == '__main__':
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main(sys.argv) |