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Multiplicity

A core concept of µcad is called Argument Multiplicity which replaces loops known from imperative languages.

When working with multiplicities, each argument can be provided as an array of elements of a parameter's type.

Each list element will then be evaluated for each of the array's values. This way, we can intuitively express a call that is executed for each argument variant.

The following example will produce 4 rectangles at different positions:

test

r = std::geo2d::Rect(width = 2mm, height = 2mm);

r.std::ops::translate(x = [-4mm, 4mm], y = [-4mm, 4mm]);

Because in the above example x and y have two values each, the result are four (2×2) calls:

test

r = std::geo2d::Rect(width = 2mm, height = 2mm);

use std::ops::translate;
r.translate(x = -4mm, y = -4mm);
r.translate(x = -4mm, y = 4mm);
r.translate(x = 4mm, y = -4mm);
r.translate(x = 4mm, y = 4mm);

Normally, this would require two nested for loops. As you may imagine, multiplicity can be a powerful tool.