Standard Library (3 of 5). Metaprogramming

Metaprogramming allows the programmer to manipulate basic Libretto entities (packages, classes, functions and fields) as mutable data structures. The tools, which are outlined in this section, can affect the basic object model of the program. Since they are powerful and brutal, it is recommended to use them with great caution and only when necessary.

Standard Library (2 of 5). Multitasking

Multitasking is implemented in the Libretto standard library. The basic components of concurrent computing in Libretto are the actor model and software transactional memory based on the optimistic approach.

Standard Library (1 of 5). Basic Datatypes

In this post I overview Libretto basic datatypes.

Computing in Libretto (5 of 5). Comments

There are two types of comments in Libretto: doc comments and code comments.

Computing in Libretto (4 of 5). Exception Handling

Exceptions and their handling in Libretto are considered here. Please pay your attention to local traps.

Computing in Libretto (3 of 5). Local Variables

All variables in Libretto are local and inaccessible from the global context. The types of Libretto variables are:

1. Block variables
2. Path variables
3. Parameter variables.

The range of local variables is a block or a path, in which they are defined. Similar to fields, local variables can be of two types – mutable (marked by the keyword var) and immutable (marked by fix).

Computing in Libretto (2 of 5). Expressions

In this post I describe the basic types of Libretto expressions.