parameters: (self, p)
docstring: number : '-' number %prec UMINUS
docstring_summary: number : '-' number %prec UMINUS
docstring_tokens: number : - number %prec UMINUS
function: def p_number_neg(self, p):
          """number : '-' number %prec UMINUS"""
          n = p[2]
          p[0] = lambda i: - n(i)
function_tokens: def p_number_neg ( self , p ) : n = p [ 2 ] p [ 0 ] = lambda i : - n ( i )