WASP 🐝

a LISP programming language for high performance and extremely concise web assembly modules

clojure ; main.w (extern console_log [message]) (defn main "main" [] (console_log "Hello World!") nop ) console wasp build

Advanced

When necessary, low level web assembly can be directly inlined ```clojure (defn-wasm malloc "malloc" [i32] [i32] ; export as "malloc", 1 input, 1 output ; this function creates an ever increasing memory allocation ; it writes the length in the first 4 bytes of the block ; followed by an zero byte to represent its free ; followed by the content [i32] ; 1 local variable to represent let currentheap = 0 ; currentheap = global.heap GLOBALGET 1 LOCALSET 1 ; memory[currentheap..currentheap+3] = length GLOBALGET 0 LOCALGET 0 I32STORE 0 0 ; global.heap = currentheap + 5 + length LOCALGET 1 I32CONST 5 I32ADD LOCALGET 0 I32ADD GLOBALSET 1 ; return currentheap + 5 LOCALGET 1 I32CONST 5 I32ADD END )

(defn main "main" [size] (malloc size) ) ```

Technical Details

• true is 1, false is 0
• nop implies the function does not return a value
• Global 0 is always the the beginning of the heap, modifying data below this point will corrupt statics/constants that were defined in your code.
• Global 1 represents the current top of the heap, your memory allocator should start here for new allocations.
• Literal strings create initialize data of a c-string at the front of your memory, and can be passed around as pointers to the very start in memory to your text. A \0 is automatically added at compile time, letting you easily have a marker to denote the end of your text.