def main():
import exprparse
import sys
from errors import subscribe_errors
lexer = exprlex.make_lexer()
parser = exprparse.make_parser()
with subscribe_errors(lambda msg: sys.stdout.write(msg + "\n")):
program = parser.parse(open(sys.argv[1]).read())
# Check the program
check_program(program)
# ----------------------------------------------------------------------
# DO NOT MODIFY ANYTHING BELOW
# ----------------------------------------------------------------------
def generate_code(node):
'''
Generate SSA code from the supplied AST node.
'''
gen = GenerateCode()
gen.visit(node)
return gen
if __name__ == '__main__':
import exprlex
import exprparse
import exprcheck
import sys
from errors import subscribe_errors, errors_reported
lexer = exprlex.make_lexer()
parser = exprparse.make_parser()
with subscribe_errors(lambda msg: sys.stdout.write(msg+"\n")):
program = parser.parse(open(sys.argv[1]).read())
# Check the program
exprcheck.check_program(program)
# If no errors occurred, generate code
if not errors_reported():
code = generate_code(program)
# Emit the code sequence
exprblock.PrintBlocks().visit(code.start_block)
#for inst in code.code:
# print(inst)
Perform constant folding optimization on the AST.
'''
return ConstantFolder(debug=debug).visit(node)
if __name__ == '__main__':
import exprlex
import exprparse
import exprcheck
import exprcode
import exprpygen
import sys
from errors import subscribe_errors, errors_reported
lexer = exprlex.make_lexer()
parser = exprparse.make_parser()
with subscribe_errors(lambda msg: sys.stdout.write(msg + "\n")):
program = parser.parse(open(sys.argv[1]).read())
# Check the program
exprcheck.check_program(program)
# If no errors occurred, generate code
if not errors_reported():
# Perform constant constants
program = fold_constants(program, debug=True)
# Create 3-address IR
code = exprcode.generate_code(program)
# Generate Python code output
exprpygen.emit_pycode("main", code)
print("if __name__ == '__main__':")
print(" main()")