Learn: Data Types

The following data types are availanle in min (with the corresponding shorthand symbols used in operator signatures in brackets):

null (null)

null value.

boolean (bool)

true or false.

integer (int)

A 64-bit integer number like 1, 27, or -15.

float (flt)

A 64-bit floating-point number like 3.14 or -56.9876.

string (str)

A series of characters wrapped in double quotes: “Hello, World!”.

quotation (quot)

A list of elements, which may also contain symbols. Quotations can be used to create heterogenous lists of elements of any data type, and also to create a block of code that will be evaluated later on (quoted program). Example: (1 2 3 + *)

dictionary (dict)

A key/value table. Dictionaries are implemented as an immediately-dequoted quotation, are enclosed in curly braces, and are represented by their symbol definitions. Note that dictionary keys must start with :and be followed by a double-quoted string, or a single word (which can be written without double quotes). The dict Module provides some operators on dictionaries.

Example

The following is a simple dictionary containing three keys: name, paradigm, and first-release-year:

{
    "min" :name
    "concatenative" :paradigm
    2017 :"first release year"
}

Additionally, dictionaries can also be typed to denote complex objects like sockets, errors, etc. For example, the following dictionary defines an error:

  {
   "MyError" :error
   "An error occurred" :message
   "symbol1" :symbol
   "dir1/file1.min" :filename
   3 :line
   13 :column
   ;error
  }

The logic Module provides predicate operators to check if an element belongs to a particular data type or pseudo-type (boolean?, number?, integer?, float?, …).

Additionally, the lang Module provides operators to convert values from a data type to another (e.g. integer, string, and so on).

→ Continue to Operators