File: x.gram

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python-pegen 0.3.0-1
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start[expr_ty]: expr NEWLINE? ENDMARKER
expr[expr_ty]: ( term '+' expr
             | (sign sign)+ term '-' expr
             | term
             )
sign: '+' | '-'
term[expr_ty]: ( factor '*' term
             | factor '/' term
             | factor
             )
factor[expr_ty]: ('(' expr ')'
               | atom
                )
atom[expr_ty]: ( NAME
               | NUMBER
               )