invisibleOperator canonicalization

[alexisflesch]

Description

Parsing some expressions with canonical : ["InvisibleOperator"] can remove items that shouldn't be removed. For example,

• parsing the expression 1(2+3) with canonical : ["InvisibleOperator"] drops the 1 (it shouldn't)
• parsing the expression 1(2+3) with canonical: false doesn't

Steps to Reproduce

Load the ComputeEngine and parse the expression 1(2+3).

const ce = new ComputeEngine();
expression = "1(1+1)";
ce.parse(expression , { canonical: ["InvisibleOperator"] }).print();

Actual Result

Gives an oversimplified MathJSON like so
["Delimiter",["Add",2,3]]

Expected Result

A less simplified MathJSON object like the one found with canonical: false.
["Multiply",1,["Delimiter",["Add",2,3]]]

Environment

Compute Engine version 0.26.4