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The Euclid programming language is a stack-based / tape-based / befunge-like language created by User:TARDIInsanity. The program remembers which of a fixed set of states (spijmg) it is in, and as it comes across any instruction symbol, it performs some action based on the combination of state and symbol. s - perform operations on the stack p, i, j - perform operations on the program pointer, which always points to cells in the 2d program array. i - (on finding an instruction) pop a value off the stack. if it is zero, ignore the instruction. unconditionally change state to p. j - (on finding an instruction) perform the operation. change state to i. m - perform operations on the memory array, which is a 1-dimensional finite tape initialized to all zeroes. Some memory instructions interact with the stack (mainly ^ which pushes the current cell and v which pops and writes from the stack) g - perform an alGebraic operation on values from the stack. nearly all possible instructions pop two values from the stack, and most push one result value back. The instruction / represents divmod, with the following additional constraint: divmod(x, 0) = (0, x). any of the ten digits 0-9 and the first six letters a-f (hexadecimal) are instructions. the symbols ? = < > ^ v / ` | - x + are also instructions. every instruction has a defined behavior for every mode. the ` character is allowed as a substitute for the backslash character. The creator's implementation of this language can be found here github.com/TARDIInsanity/Euclid. Further documentation about the program's behavior is defined in the doc file. Usage notes for the implementation can be found in the readme file.
A simple truth machine implemented in Euclid:
A simple "hello, world!" program:
Non-category features to note: -Imperative paradigm -Deterministic -Not quantum, concurrent, reversible, or self-modifying. -Has console IO -Not in the list of known derivatives (partially derivative of befunge) -Text-based code input -Unsure about the theme or lack of a theme