AReg is a superset of Brainfuck, adding an extra register next to a memory tape, which values can be copied from and to, and which can be modified itself in the same way as slots on the memory tape. In addition, AReg adds a few extra commands to print numbers and system dependent newlines.
The runtime has a "target register" and a "recipient register". The target register is used to read and write to. The recipient register is used to copy from and swap with. A the start of the program, the target register is the pointed memory register, and the recipient register is the A Register. The runtime can swap the 'target' and 'recipient' labels on command.
List of commands:
>Increments the tape pointer. If the pointer falls out of the tape, the pointer is set to 0<Decrements the tape pointer. If the pointer falls out of the tape, the pointer is set to the tape end+Increments the target register. If it exceeds the maximum value (255 by default), it is set to 0-Decrements the target register. If it exceeds 0, it is set to the maximum value (255 by default),Reads one character from the standard input, as ASCII (0 if the character is not ASCII) and store it in the target register.Prints the value in the target register as ASCII[Jumps to the matching]if the pointed memory register is 0]Jumps to the matching[if the pointed memory register is not 0(Jumps to the matching)if the pointed memory register equals the A Register)Jumps to the matching(if the pointed memory register does not equal the A Register^Flips the target register and the recipient register;Copies the value from the recipient register into the target register:Swaps the values of the recipient register and the target register!Prints the value in the target register as a decimal number_Prints a system dependent newline character (CRLF on windows, LF on MacOS and most other platforms)
In addition, AReg ignores any character between # and any newline character (CR or LF), allowing you to make comments with punctuation without having to care about accidentally writing extra commands. AReg still ignores any non-command character outside of comments.
This program prints the Fibonacci sequence up to 144, separated by whitespaces.
++++++++++>>+>+<<<[>>[>]<^;^>>;<<<^;^>>;>[<+>-]<[<]<-]^;++++++++++++++++++++++++++++++++^>>[!>^.^]
For an explanation, see examples/fibonacci.areg.
This program prints Hello World! with a newline. Almost the same as Brainfuck, except it uses the _ instruction to print a system dependent newline.
++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>-[<]<-]>>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+._
For an explanation, see examples/helloworld.areg.