Vix.cpp

Appearance

REPL ​

Vix CLI includes a built-in REPL (Read-Eval-Print Loop).

It allows you to:

  • Evaluate expressions
  • Test small logic
  • Work with variables
  • Inspect JSON-like objects
  • Explore the environment quickly

Start the REPL ​

bash
vix

Example output:

Vix.cpp v1.x.x (CLI) — Modern C++ backend runtime
Exit: Ctrl+C / Ctrl+D or type exit
>>>

Basic Math ​

You can evaluate expressions directly:

>>> 1 + 2
3

>>> 4 / 2
2

>>> 3 * (2 + 4)
18

Division by zero is safely handled:

>>> 4/0
Error: division by zero

Variables ​

Assign values:

>>> x = 3
>>> x
3

>>> x + 1
4

>>> x = x + 7
>>> x
10

Arrays ​

>>> nums = [1,2,3,4]
>>> nums
[1, 2, 3, 4]

Objects ​

JSON-like objects are supported:

>>> user = {"name": "Gaspard", "age": 26}
>>> user
{"name":"Gaspard","age":26}

Nested structures:

>>> profile = {"name":"Gaspard","meta":{"country":"UG","verified":true},"tags":["cpp","vix","repl"]}

Built-in Commands ​

help                    Show help
help <command>          Help for a command
version                 Show CLI version
pwd                     Print working directory
cd <dir>                Change directory
clear                   Clear screen
history                 Show command history
history clear           Clear history
exit                    Exit REPL

History ​

>>> history
1  1+2
2  x=3
3  x+1

Clear history:

>>> history clear

Behavior Notes ​

  • The REPL is stateful within a session.
  • Variables are reset when you exit.
  • Build/run commands are disabled inside REPL.
  • Designed for quick experimentation, not full application execution.

When To Use REPL ​

  • Test math logic
  • Validate JSON structures
  • Experiment with expressions
  • Debug small ideas quickly
  • Demonstrate Vix syntax interactively

The REPL is intentionally minimal and predictable.

No hidden behavior. No magic runtime state. Just explicit evaluation.