Make a 3var interpreter!

JavaScript (ES7) 208 213 223 237 241 311

Edit3 Copying each other, I and Dendrobium are collapsing together.

Edit2 Using EcmaScript 7 to save just 2 bytes, joined together handling of A and B

Edit Following the changes of the rules.

Note, I added the r command that is not required in the question, just to run the old example Hello world

V=p=>(o='',[for(c of'@#e'+p)eval('++x,--x,x*=x,x=R,x=0,o+=x,o+=String.fromCharCode(x),R=A+B,R=A-B,R=A*B,R=A/B|0,R=0,o+=R+` `'.replace(/x/g,(k='ids>@pP+-*/ewakm<#oO'.indexOf(c))<13?'A':'B').split`,`[k%13])],o)

// More readable
U=p=>(
  o='',
  [for(c of'@#e'+p)
   eval(
   '++x,--x,x*=x,x=R,x=0,o+=x,o+=String.fromCharCode(x),R=A+B,R=A-B,R=A*B,R=A/B|0,R=0,o+=R+` `'
   .replace(/x/g,(k='ids>@pP+-*/ewakm<#oO'.indexOf(c))<13?'A':'B')
   .split`,`[k%13])]
  ,o
)

// ES6, no array comprehension, 2 bytes more
W=p=>
  [...'@#e'+p].map(c=>
    eval(
    '++x,--x,x*=x,x=R,x=0,o+=x,o+=String.fromCharCode(x),R=A+B,R=A-B,R=A*B,R=A/B|0,R=0,o+=R+` `'
    .replace(/x/g,(k='ids>@pP+-*/ewakm<#oO'.indexOf(c))<13?'A':'B')
    .split`,`[k%13]),
    o=''
  )&&o

// Test
function test() 
{ 
  OUT.innerHTML = V(I.value) 
}

test()
textarea { width: 75%; height: 8em }
Test program <button onclick="test()">Run</button><br><textarea id=I>
iisssaa/>e
maa->e#
aamam->e#
dddddddddddddddddddddddddPiiiiiiiiiiiiiiiiiiiiiiiii
iiiiPiiiiiiiPPiiiP
@#e
iis
aamaaaa
*>P
@#e
iisssaa/>e
maa->e#
aamam->e#
iiiiiiiiiiiiiiiiiiiiiiP
ddddddddP
iiiP
ddddddP
ddddddddP
@#e
iiss
aa*>
iP
</textarea><br>Output<pre id=OUT></pre>


GNU Sed (with eval option to evaluate dc expression), 254

Deadfish maps fairly nicely to a subset of dc. So we use sed to do that mapping:

s/^/@#e/
s/\+/AB+r/g
s/-/AB-r/g
s/\*/AB*r/g
s|/|AB/r|g
s/a/B1+b/g
s/i/A1+a/g
s/d/A1-a/g
s/s/Ad*a/g
s/p/An/g
s/P/AP/g
s/>/Ra/g
s/k/B1-b/g
s/m/Bd*b/g
s/o/Bn/g
s/O/BP/g
s/</Rb/g
s/w/Rn/g
s/@/0a/g
s/#/0b/g
s/e/0r/g
s/[ABR]/l&/g
s/[abr]/s\u&/g
s/.*/dc -e'&'/e

Try it online!


Javascript ES6 ES7, 217 215 213 208 bytes

f=s=>(O='',[for(c of'@#e'+s)eval('v=0,++v,--v,v*=v,O+=v,O+=String.fromCharCode(v),v=R,R=0,R=A+B,R=A-B,R=A*B,R=A/B|0,O+=R+" "'.replace(/v/g,'AB'[(x='@idspP>e+-*/w#akmoO<'.indexOf(c))/13|0]).split`,`[x%13])],O)

Ungolfed

f=s=>(
    O='',                                                                   // initialize output to empty string
    [for(c of'@#e'+s)eval(                                                  // initialize A, B, and R, loop over all chars in input, eval returned function string
        'v=0,++v,--v,v*=v,O+=v,O+=String.fromCharCode(v),v=R,R=0,R=A+B,R=A-B,R=A*B,R=A/B|0,O+=R+" "' // operation list
            .replace(/v/g,'AB'[(x='@idspP>e+-*/w#akmoO<'.indexOf(c))/13|0]) // replace all instances of v with either A or B
            .split`,`[x%13])],                                              // split ops list, select corresponding function string
    O)                                                                      // return output string

Tags:

Interpreter

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