genish.js/codegen_mockup.js

gen~ in js

//test
gen = require('./dist/index.js'); accum = gen.accum; add = gen.add; param =gen.param; mul = gen.mul;test=acc = accum( .1, param() );add( mul( acc, 2 ), acc );b = gen.gen.createCallback( test );b()

gen = require('./dist/index.js'); 
accum = gen.accum; add = gen.add; param =gen.param; 
mul = gen.mul; acc= accum(.1,param()); 
test=add( mul( acc, 2 ), acc ); 
b = gen.gen.createCallback( test );
b()

gen = require('./dist/index.js'); 
accum = gen.accum; add = gen.add; param =gen.param; 
mul = gen.mul; p = param();
test= add( mul( p, 2 ), p ); 
b = gen.gen.createCallback( test );
b()

// convert
acc  = accum( .1, param() );
test = add( mul( acc, 2 ), acc )
out  = gen.createCallback( test )

// to:
function( accum1, p0 ) {
  'use strict';
  let accum1_incr = 0.1, accum1_reset = p0, accum1_out;
  
  accum1.value += accum1_incr

  if (accum1_reset >= 1) {
    accum1.value = accum1.min
  } else {
    if (accum1.value > accum1.max) accum1.value = accum1.min
  }
  
  accum1_out = accum1.value

  return accum1_out * 2 + accum1_out
}

// convert accum(.1, param() )
1. add p0 to callback arguments
2. create function body
3. process value .1: convert all instances of _incr to .1 in code
4. process value param(): convert all instances of _reset to p0
5. memoize: gen.memo.accum1 = 'accum1.value'

// convert mul( acc,2 )
1. lookup acc in memo: 'accum1.value'
2. combine with binop: 'accum1.value * 2'
3. surround in parenthesis: '(accum1.value * 2)'

// process add( mul, acc )
1. get value from mul: '(accum1.value * 2)'
2. add acc: '( accum1.value * 2 ) + acc'

// add return to last line
1. 'return ( accum1.value * 2 ) + acc'

// final function
function( accum1, p0 ) {
  accum1.value += .1

  if (p0 >= 1) {
    accum1.value = accum1.min
  } else {
    if (accum1.value > accum1.max) accum1.value = accum1.min
  }

  return (accum1.value * 2) + acc
}