def subexpr()

in evaluation/latex2sympy/gen/PSParser.py [0:0]
40 lines of code
6 McCabe index (conditional complexity)

    def subexpr(self):

        localctx = PSParser.SubexprContext(self, self._ctx, self.state)
        self.enterRule(localctx, 118, self.RULE_subexpr)
        try:
            self.enterOuterAlt(localctx, 1)
            self.state = 1016
            self.match(PSParser.UNDERSCORE)
            self.state = 1025
            self._errHandler.sync(self)
            token = self._input.LA(1)
            if token in [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 154, 173, 176, 179, 180, 190, 191, 192, 193, 194]:
                self.state = 1017
                self.atom()
                pass
            elif token in [55]:
                self.state = 1018
                self.match(PSParser.L_BRACE)
                self.state = 1021
                self._errHandler.sync(self)
                la_ = self._interp.adaptivePredict(self._input, 89, self._ctx)
                if la_ == 1:
                    self.state = 1019
                    self.expr()
                    pass

                elif la_ == 2:
                    self.state = 1020
                    self.args()
                    pass

                self.state = 1023
                self.match(PSParser.R_BRACE)
                pass
            else:
                raise NoViableAltException(self)

        except RecognitionException as re:
            localctx.exception = re
            self._errHandler.reportError(self, re)
            self._errHandler.recover(self, re)
        finally:
            self.exitRule()
        return localctx