One line command to create items

[hilaire]

Difficulty: 3/3

Dr. Geo proposes script to plug computing object in a sketch, these objects are inserted in the Dr. Geo items tree and it can be used in the subsequent construction

Dr. Geo proposes Smalltalk sketch, it is a way to describe a geometric sketch entirely under the form of Smalltalk instructions code with a dedicated API.

We propose an intermediate feature to let user insert in the items tree an item described by a one line Smalltalk instruction. It should be based on the Smalltalk sketch API.
Examples of such one line instructions:

A = point: 1@2
(AB) = line: A to: 5@5
p1 = perpendicular: (AB) to: A
p2 = perpendicular: (AB) to: 1@1

Please comment below to elaborate.