Language Features Added To The rs274ngc Specification

This is what I've dubbed to be "gcode++" which introduces modern control-flow constructs like import, while, for, and if, to support modular, readable, and maintainable CNC programs.

Imports

import "./filename"

Imports are as good as C's include - all parameters and subroutines are essentially copy-pasted accross files. Circular imports result in an error.

While loops

while #1 < 3
    ; do something here
end ; or endwhile

Evaluate the loop body as long as the condition holds true.

For loops

for #1 from 0 to 3
    ; do something here
end ; or endfor

Iterate from the start to the end value (inclusive). The loop variable must be a parameter like #1.

Continue and Break

continue and break keywords can be used in order to exit a loop or skip iterations.

If Statements

if #1 > 30
    ; do something here
end ; or endif

Executes the block only if the condition is true.

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