net

This function is the primary function called upon by << to format expressions for printing. The default method provided by the system is to convert x to an Expression with expression and then to convert that to a net.

A new method for formatting expressions of class X may be installed by the user with code of the form net X := x -> ... . The function provided by the user should return a net or a string.

A string is formatted by wrapping it in quotation marks and converting nonprinting characters to escape sequences. A net is formatted for printing by enclosing it in a box.

     i1 = "a string"
     
     o1 = "a string"
     

     i2 = net "a string"
     
     o2 = "\"a string\""
     

     i3 = ZZ[x]
     
     o3 = ZZ[x]
     
     o3 : PolynomialRing
     

     i4 = x^2
     
           2
     o4 = x
     
     o4 : ZZ[x]
     

     i5 = net x^2
     
          +--+
          | 2|
     o5 = |x |
          +--+
     
     o5 : Net
     

     i6 = code(net,List)
     
     -- nets.m2:23-29
     net List := x -> horizontalJoin deepSplice (
          "{",
          unlist between(",",apply(x,i -> (
                         if class i === Sequence
                         then ("(", net i, ")")
                         else net i))),
          "}")

See also Net, expression, Expression, and Net.

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