Modules

A module groups declarations. Each file is a module, and mod declares one inside another:

mod shop = {
  pub def tax_rate = 0.25
  pub def with_tax(price! num)! num = price * (1 + tax_rate)
  def margin = 0.4
}

shop:: reaches the names in shop:

shop::with_tax(8) // {10}

Only pub declarations are visible outside a module:

shop::margin // error SK4202

The standard library

SakaQL comes with standard library modules, such as str for text and num for numbers:

str::upper_ascii("saka") // {"SAKA"}

The prelude’s names, such as sum and count, need no prefix.

Module files

The REPL starts in main.saka, the database’s main file. The REPL’s commands start with a colon. :create makes a new file and switches the REPL to it:

:create "pricing.saka"

The declarations you enter now go into pricing.saka:

pub def discount(price! num)! num = price * 0.9

:module switches back to main.saka, where use mod imports the new module:

:module "main.saka"

use mod pricing = "pricing.saka"

pricing::discount(10) // {9}

The Files sidebar lists the database’s files.