I'm writing a plug-in to map some of the symbols found in math-menu.scm across to Maxima in a natural way, rather than simply substitute a math symbol for another token, I'd like to use the context of the surrounding items, for e.g.

(this example relates to the Maxima plug-in, but in general is applicable to any plug-in)

(%i1) 1 = / 2; /* = / are the keystrokes to generate the <neq> symbol */

Incorrect syntax: is is not an infix operator

1 is(

(%i1)

What I'd really like is for the <neq> symbol to get converted to:

is(not equal(1, 2));

Is it possible to refer to the operands in the conversion rule, or maybe you can use a RegEx to identify which tokens to the left and right of the operator will be consumed and re-arranged in the output?

Many thanks,

Duncan