design.md

Units

Base units are defined with base unit

unit kilogram
unit meter
unit second

unit pixel
unit basepair

Names like m<unit>, k<unit>, μ<unit>/u<unit>, ... will automatically map to a unit with the given prefix.

(Units act like the value 1 with the given unit, so they can be used in expressions like other variables)

Items

Declarations

Variables are declared by writing a name that has not been used yet, an equals sign and its value.

In an expression, juxtaposition is multiplication.

distance = 12 meter
time = 5 second
speed = distance / time

Units can be aliased, in which case they can be used in creating nicer output (for example 2.1 min instead of 126 second).

Unit aliases behave like variables in all other ways.

unit m = meter
unit s = second

distance = 12 m
time = 5 s

Expressions / evaluations

A line can also be an expression. The expression will be evaluated. To print an expression, the line has to begin with >. This will print the symbolic expression and the evaluated value.

To get the unit of an expression, square brackets are used.

[speed]

Any indented text will count as belonging to the last definition.

TODO maybe add automatic grouping based on lines??

x = 12 ^ 12 ^
   12 - 32 *
   12 / 12

This would need to handle leading/trailing operators

Functions

Functions can be defined by writing the name of the function followed by the arguments in parenthesis, separated by ,.

length(t) = speed * t