TinyScript (or tisc for short) is a very small scripting language - as the name suggests. It is a little side project, so I can get a feel how to get going with programming/scripting language design and implementation.
As this project is meant to be used in any production system, it is unlikely that any serious and detailed documentation will be added.
The data types available are string and number.
A string is just text and a number always refers to a double.
TinyScript allows you to perform arithmetic, but without operator precedence. To enforce precedence, just combine operations with parenthesis.
Supported operations:
+- if both sides are of typenumber, an addition will be performed. Otherwise this operation will default to astringconcatenation*- if both sides are of typenumber, a multiplication will be performed. Otherwise aRuntimeErrorwill be thrown-- if both sides are of typenumber, a subtraction will be performed. Otherwise aRuntimeErrorwill be thrown/- if both sides are of typenumber, a division will be performed. Otherwise aRuntimeErrorwill be thrown**- if both sides are of typenumber, the left number will be raised to the power of the right number. Otherwise aRuntimeErrorwill be thrown
Variable names have to start with a $.
A variable name may contain the letters A-Z (in upper and lower) and underscores (_).
New variable values may change the type of a variable.
A variable always has to be initialized with a value. So, a variable initialization looks like this:
$name := "John Doe"
$age := 22
You may also assign the result of an expression to a variable:
$age := 2 ** 3
The naming rules for functions are the same as they are for variables. This example illustrates the definition and usage of a function:
#circle_area $radius
3.141592654 * ($radius ** 2)
#circle_area
$radius := 1
$area := [circle_area:$radius]
A function definition starts with a hash (#) and is followed by the name of the function.
After the name follows a listing of the parameters of the function.
The function body ends with the same name declaration as the function header started with.
The function body may contain any regular statements, where the last statement in the function will be its return value.
Calling a function works by placing a block of brackets [], where the first part is the name of the function, followed by a list of its arguments, which are separated by colons :.
A function may also not take any parameters, so you would just wrap the function's name in brackets.
It is also possible to use a function call as a parameter for another function call.
This project is licensed under version 3 of the GNU General Public License.