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Update syntax.md

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Lauchmelder 2021-11-27 22:59:21 +01:00 committed by GitHub
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src/doc/syntax.md
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@ -1,15 +1,21 @@
# Syntax
```
point(3 | 4) -> A
point(6 | 7) -> B
[point(3, 4) -> A]
point(6, 7) -> B
line(A, B) -> AB
line(0 | 0, 100 | 100)
line(point(0, 0), point(100, 100))
circle(A, len(AB))
```
## Behaviour
Every line is one instruction. It is possible to assign instructions names to re-use them later.
These variables are immutable. Objects do not exist in this script, in fact, variables are more similar to C-style macros than actual variables.
Lines in brackets `[]` are "hidden". They are parsed, but will not be rendered.
## Primitives
* `Point point(x, y)` is a 2D point. It returns an element of type `Point`
* `Line line(Point from, Point to)` is a straight line. It returns an element of type `Line`.
@ -21,4 +27,4 @@ instruction ::= identifier({parameter, }) [-> identifer]
parameter ::= instruction | identifier | number
identifier ::= (A-Za-z)
number ::= (0-9)[.(0-9)]
```
```