DougGregor

Swift Macros Dashboard

Macros are a power feature in a number of programming languages that make the language more extensible. Swift has always sought to enable expressive libraries through its use of type inference, generics, and general approach toward clarity of use. Macros in Swift are intended to improve expressiveness without sacrificing clarity.

This gist provides a "dashboard" with links to the various documents and example projects that are part of the Swift Macros effort. Head on over to the Swift Forums if you have questions!

Overview and examples:

• Macros vision document: lays out the overall motivation, goals, and approach we're taking in the implementation of macros in Swift.
• Example macros repository: contains a number of example macros that demonstrate the capabilities of the macro system and how it integrates into the language. This

un1tz3r0

''' Read and parse SVG files returning a shapely GeometryCollection containing the paths and primitives found.
Transforms are applied and all shapes are returned in the SVG root elements coordinate space. Primitives (rect,
circle and ellipse) are converted to equivalent paths, and only shape outlines are rendered, stroke properties
have no affect and are discarded. 

Curved paths (arc and bezier commands and rounded rect, ellipse and circle elements) are linearized using a 
naive approach that attempts to create enough segments to reduce maximum distance to the curve to below a 
certain threshold, although this is probably not very efficient and most likely implemented in a fairly
broken way.'''