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Language.js
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Language.js
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/**
* 1) Variable declartion and assignment inside square brackets -> ex: [ x = 90 ]
*
* 2) List's / array's are defined inside double square brackets -> ex: [ arr = [[1,2,3,4,5]] ]
*
* 3) Dictionarie's / object's are defined inside double curly brackets -> ex: [ dict = {{"name":"Krishna","age":19}} ]
*
* 4) Functions are called inside single curly brackets -> ex: { print("Hello World") }
*
* 5) Functions are defined using "def" keyword and must end with ";" ( identation not neccesary )
* ex:
* def Sum()
* ...code...
* ;
*
* 6) For loops must end with ":" else same as for-in loop's in python ( identation not neccesary but new line is neccesary )
* ex:
* for [i] in (10)
* {print(i)}
* :
*
* 7) if statement's same as python but they end with "?" ( identation not neccesary but new line is neccesary )
* ex:
* if 8 + 2 is 10
* {print("YES")}
* ?
*
* 8) Conditional's are defined inside double parenthesis -> ex: [ condition = ((1>0)) ]
*/
class BuiltInFunctions_RadhaProgrammingLanguage{
constructor(){
this.builtInFunctions = ["print","capitalize","casefold","type",]
this.userDefinedFunctions = [] // empty array to store user defined functions .
}
print(data){
if(typeof(data)==="string"){
data = data.replaceAll(","," ") // we don't display comma's in between variable's to be printed hence they are seprated by whitespace .
console.log(data.replace(/'/g,"").replace(/"/g,""))
}
else{ console.log(data) }
}
capitalize(data){ return data.toUpperCase() }
casefold(data){ return data.toLowerCase() }
type(data){
if(isNaN(Number(data))){ return "<class 'str'>" }
if(!isNaN(Number(data))){ return "<class 'int'>" }
}
FunctionCaller(index,params){
if(index===0){ this.print(params) }
if(index===1){ return this.capitalize(params) }
if(index===2){ this.casefold(params) }
if(index===3){ this.type(params) }
}
}
class RadhaProgrammingLanguage extends BuiltInFunctions_RadhaProgrammingLanguage{
constructor(code){
super();
let temp_code = code.split(/\n\s/g)
for(let i = 0 ; i < temp_code.length ; i++){
if(!this.isValid(temp_code[i])){
throw `
Parenthesis don't match at line ${i} you might
have forgoten a closing or opening bracket !!
`
}
}
this.CODE = code.split(" ").join("")
this.LETTERS =/^[a-zA-Z]*$/
this.NUMBERS = /[0-9]/gi
this.KEYWORDS = [
"for","in","if","is","else","def","and","or",
"brk:","con:","ret:","True","False","None","not"
]
this.VARIABLES = new Map() // hash map to store variables .
this.FUNCTIONS = new Map() // hash map to store user defined functions .
this.CURRENTLY_RUNNING_FUNCTION_STACK = [] // stack to hold currently executuing function .
this.MainProgramThread(0,this.CODE)
}
isValid(s){
var st = []
for(var l of s)
if ((l="({[]})".indexOf(l))>-1)
if (st[st.length-1]+l===5)
st.length--;
else
st.push(l);
return st.length===0
};
CheckIfString(str){
let l = str.length-1
if( (str[0] === `"` || str[0] === `'`) && (str[l] === `"` || str[l] === `'`) ){ return true }
else return false
}
MainProgramThread(index,script){
let c = script || this.CODE
for(let pointer = index ; pointer < c.length ; pointer++ ){
if(/\s/g.test(c[pointer])){ pointer++ } // skipping white spaces
if(/#/g.test(c[pointer])){ // it's a comment
while(c.length){
if(c[pointer] === "\n"){ break }
pointer++
}
}
if(c[pointer] === "["){ // assignment of variables
if( c[pointer+1] === "]" ){ break } // in case of empty declaration [] like this we must break else loop
pointer++ ; let varName= "" ; let varValue = "" ; let i = 0
while(true){ // for variable name
if(c[pointer] === "="){ break }
varName += c[pointer]
pointer++
}
if(this.KEYWORDS.includes(varName)){ // variable name cannot be same as name of keywords .
throw `
Syntax Error : invalid syntax "${varName}"
is a reserved keyword it cannot be used !!
`
}
pointer++ // move ahead
if( c[pointer]+c[pointer+1] === "[[" ){ // array is declared
pointer = pointer + 1
varValue = this.ArrayDeclaration(pointer,c)
this.VARIABLES.set(varName,varValue)
}
else if( c[pointer]+c[pointer+1] === "{{" ){ // dictionary / object is declared .
pointer = pointer + 1 ; let varValue = ""
while(true){
varValue += c[pointer]
if( c[pointer] === "}" ){ break }
pointer++
}
varValue = `${varValue}`
this.VARIABLES.set(varName,JSON.parse(varValue))
}
else{ // integer or string is declared
while(true){
if(c[pointer] === "]"){ break }
varValue += c[pointer]
pointer++
}
if( this.VARIABLES.has(varValue[0]) && varValue[1] === "[" ){
varValue = this.ReturnPropertyOfObject(varValue)
}
if( this.builtInFunctions.includes(varValue.split("(")[0].replace(/[{}]/g,"")) ){
let fn = varValue.split("(")[0].replace(/[{}]/g,"")
let pr = varValue.split("(")[1].replace(/[{}]/g,"")
// in case variable is assigned value returned from a function .
// Execute function will then call Function Caller which will again call
// the respective function that return the executed value to the
// Function Caller which then returns to Execute function and then it returns here .
varValue = this.ExecuteFunction(fn,pr)
}
else{ varValue = this.ProcessData(varValue) }
this.VARIABLES.set(varName,varValue)
}
}
if(c[pointer] === "{"){ this.HandleDefinedFunctions(pointer+1,c) ; break ; }
if( c[pointer]+c[pointer+1]+c[pointer+2] === "for" ){ this.ForLoopInterpreter(pointer+3,c) ; break ; }
let k = c[pointer]+c[pointer+1]+c[pointer+2]+c[pointer+3]
if( k === "ret:" ){ // return statement .
if(this.CURRENTLY_RUNNING_FUNCTION_STACK.length>0){
let fnName = this.CURRENTLY_RUNNING_FUNCTION_STACK[0]
let ret_val = this.ProcessData(this.LoopTillGivenCharacter(pointer+4,":",c)[1])
this.VARIABLES.set(fnName,ret_val)
this.CURRENTLY_RUNNING_FUNCTION_STACK.pop()
}
}
if( c[pointer]+c[pointer+1] === "if" ){
this.IfInterpreter(pointer+2,c) ; break ;
}
if( c[pointer]+c[pointer+1]+c[pointer+2] === "def" ){ this.RegisterUserDefinedFunctions(pointer+3) ; break }
}
}
ArrayDeclaration(pointer,c){
let varValue = [] ; pointer++
while(c[pointer]+c[pointer+1] !== "]]"){
varValue += c[pointer]
if(pointer>this.CODE.length){ break }
pointer++
}
varValue = `[${varValue}]`
return JSON.parse(varValue)
}
ReturnElementAtIndexOfArray(varValue){
varValue = varValue.split("[")
if(this.VARIABLES.has(varValue[0])){
let temp = this.VARIABLES.get(varValue[0]) // array whose element is required
let index = varValue[1].replace("]","") // index of element to be searched
if( !typeof(temp) === "object" ){ throw `TypeError: "${this.type(temp)}" object is not subscriptable .` } // given variable is not an array
if( index >= temp.length ){ throw `IndexError: list index out of range` } // index is greater than array length .
return temp[index]
}
else if( !this.VARIABLES.has(varValue[0]) ){ throw `NameError : name "${varValue[0]}" is not defined .` }
}
ReturnPropertyOfObject(data){
data = data.split("[")
let obj = this.VARIABLES.get(data[0])
if(obj.hasOwnProperty(data[1])){ return obj[data[1]]+"" }
else{ throw `Name Error : "${data[1]}" not found in ${obj} .` }
}
ProcessData(varValue){
if( this.VARIABLES.has(varValue) ){ varValue = this.VARIABLES.get(varValue) } // if variable is assigned another variable
else if( varValue[0]==="{" ){
this.HandleDefinedFunctions(1,varValue)
if(this.isValid(varValue)){ varValue = this.VARIABLES.get(varValue.replace(/[{}]/g,"")) } // to avoid error's in parenthesis occured during executuion , don't disturb this block ..
else{ varValue = this.VARIABLES.get(varValue.replace(/[{}]/g,"")+")") } // don't make changes read above comment .
}
else if( varValue.includes("((") ){ varValue = eval(varValue.replaceAll(/[()]/g,"")) } // conditional's
else if(varValue.includes("+")){ varValue = this.HandleAddition(varValue) } // for 2+2 or "hello"+"world" such cases
else if(varValue.includes("-")){ varValue = this.HandleSubtraction(varValue) } // for 4-2 such cases
else if(varValue.includes("*")){ varValue = this.HandleMultiplication(varValue) } // for 2*2 such cases
else if(varValue.includes("/")){ varValue = this.HandleDivision(varValue) } // for 2/2 such cases
else if(varValue.includes("%")){ varValue = this.HandleMod(varValue) } // for 2%2 such cases
else if(varValue.includes("[")){ varValue = this.ReturnElementAtIndexOfArray(varValue) }
else if( !this.CheckIfString(varValue) && isNaN(Number(varValue)) && !this.KEYWORDS.includes(varValue) ){
throw `NameError : name "${varValue}" is not defined .`
}
return varValue
}
HandleAddition(data){
data = data.split("+") ; let int_sum = 0 ; let str_sum = "" ;
for(let i in data){ data[i] = this.ProcessData(data[i]) }
for(let i = 0 ; i < data.length ; i++ ){
if( this.CheckIfString(data[i]) ){ str_sum += data[i].replace(/"/g,"").replace(/'/g,"") } // for adding strings
if(!this.CheckIfString(data[i])){ int_sum += Number(data[i]) } // for adding numbers
}
if(int_sum===0){ return str_sum } // two strings were passed . BUG FOUND <--
if(str_sum===""){ return int_sum+"" } // two integers were passed
else{ throw `TypeError: can only concatenate str (not "int") to str` } // one string and one integer were passed which cannot be added in python.
}
HandleSubtraction(data){
data = data.split("-")
if( this.CheckIfString(data[0]) ){ // if it is a program string (quotes prresent) then it can't be subtracted .
throw `TypeError: unsupported operand type(s) for -: '${this.type(data[0])}' and '${this.type(data[1])}' `
}
data[0] = this.ProcessData(data[0]) ; let ans = data[0]
for(let i = 1 ; i < data.length ; i++){
if( this.CheckIfString(data[i]) ){ // strings can't be subtracted .
throw `TypeError: unsupported operand type(s) for -: '${this.type(data[i])}' and '${this.type(data[i+1])}' `
}
data[i] = this.ProcessData(data[i])
ans -= Number(data[i])
}
return ans+""
}
HandleMultiplication(data){
data = data.split("*") ; let ans = 1
for(let i = 0 ; i < data.length ; i++){
if( this.CheckIfString(data[i]) ){ // strings can't be multiplied .
throw `TypeError: can't multiply sequence by non-int of type '${this.type(data[i])}'`
}
data[i] = this.ProcessData(data[i])
ans = ans * data[i]
}
return ans
}
HandleDivision(data){
data = data.split("/")
if( this.CheckIfString(data[0]) || this.CheckIfString(data[1]) ){ // strings can't be divided
throw `TypeError: can't divide sequence by non-int of type '${this.type(data[0])}'`
}
data[0] = this.ProcessData(data[0])
data[1] = this.ProcessData(data[1])
return data[0]/data[1]
}
HandleMod(data){
data = data.split("%")
if( this.CheckIfString(data[0]) || this.CheckIfString(data[1]) ){ // strings can't be divided
throw `TypeError: can't divide sequence by non-int of type '${this.type(data[0])}'`
}
data[0] = this.ProcessData(data[0])
data[1] = this.ProcessData(data[1])
return data[0]%data[1]
}
RegisterUserDefinedFunctions(pointer){
let c = this.CODE ; let fnName = "" ; let params = "" ; let fn_code = "" ; let temp ;
// temp[0] has the modified pointer and temp[1] has the value after looping .
temp = this.LoopTillGivenCharacter(pointer,"(",c) // looping to get fnName (function name)
fnName = temp[1]
temp = this.LoopTillGivenCharacter(temp[0]+1,")",c) // looping to get params (function paramaters)
params = temp[1]
temp = this.LoopTillGivenCharacter(temp[0]+1,";",c,`Syntax Error : Function never ended ";" not found .`) // looping to get fnCode (function code/script)
fn_code = temp[1] ; pointer = temp[0]+1
let FN_OBJECT = {}
FN_OBJECT.PARAMETERS = params.split(",")
FN_OBJECT.CODE = fn_code + ":" // adding a semi colon bcuz else it would give error in case of user defined function .
this.userDefinedFunctions.push(fnName)
this.FUNCTIONS.set(fnName,FN_OBJECT)
this.MainProgramThread(pointer+1,c)
}
LoopTillGivenCharacter(pointer,till,optional_script,optional_error_message,optional_condition){ // "till" is the character till which we have to loop .
let return_value = "" ;
optional_condition = optional_condition || false
if(optional_script===undefined){ optional_script = this.CODE } // if optional_script not provided then entire code is considered .
// console.log(optional_script)
while(true){
if(optional_script[pointer]===undefined){ break }
if( optional_script[pointer] === till ){
if(optional_condition){ return_value += optional_script[pointer] ; break } // optional condition specifies wheather "till" character should also be included in the return result string .
else{ break }
}
if( pointer > this.CODE.length ){
if(optional_error_message === undefined){ break } // optional error message for more symantic erorrs .
else{ throw optional_error_message }
}
return_value += optional_script[pointer]
pointer++
}
return [pointer,return_value]
}
HandleDefinedFunctions(pointer,script){
let c = script ; let fnName = "" ; let PARAM_VALUES = "" ; let temp ;
temp = this.LoopTillGivenCharacter(pointer,"(",c)
fnName = temp[1] ; pointer = temp[0]+1
temp = this.LoopTillGivenCharacter(pointer,")",c)
PARAM_VALUES = temp[1] ; pointer = temp[0]+1
// console.log(PARAM_VALUES)
if( this.builtInFunctions.includes(fnName) ){ this.ExecuteFunction(fnName,PARAM_VALUES) }
if( !this.builtInFunctions.includes(fnName) && !this.userDefinedFunctions.includes(fnName) ){
throw `Name "${fnName}" is not defined !`
}
if( this.userDefinedFunctions.includes(fnName) ){
let script = this.FUNCTIONS.get(fnName).CODE // execute the function script stored in the FUNCTION hash map.
let PARAMS = this.FUNCTIONS.get(fnName).PARAMETERS ; PARAM_VALUES = PARAM_VALUES.split(",")
if(PARAM_VALUES.length !== PARAMS.length){ // uneven argument number (arguments = params)
throw `"${fnName}" takes ${PARAMS.length} arguments got ${PARAM_VALUES.length}`
}
for(let i in PARAMS){ this.VARIABLES.set(PARAMS[i],PARAM_VALUES[i]) }
this.CURRENTLY_RUNNING_FUNCTION_STACK.push(fnName+"("+PARAM_VALUES+")") // added ending bracket check in case of print()
this.MainProgramThread(0,script,fnName)
}
this.MainProgramThread(pointer,c)
}
ExecuteFunction(fnName,params){
params = params.replace(")","") ; let temp = params.split(",")
if(temp.length>1){
for(let i in temp){ temp[i] = this.ProcessData(temp[i]) }
params = temp+"" ;
}
else{ params = this.ProcessData(params) }
for(let i = 0; i < this.builtInFunctions.length ; i++){
if(this.builtInFunctions[i] === fnName){ var ans = this.FunctionCaller(i,params) || null }
}
return ans
}
ForLoopInterpreter(pointer,script){
let c = script ; let loop = "" ; let loop_script = "" ; let temp ;
while( c[pointer] != "\n" ){ loop += c[pointer] ; loop += "" ; pointer++ }
loop = loop.split("in")
if(loop.length <= 1){ throw `Syntax Error : "in" missing .` } // "in" neccesary for looping .
temp = this.LoopTillGivenCharacter(pointer,":",c,'Syntax Error : Loop end ":" not found .')
loop_script = temp[1] ; pointer = temp[0]
if( loop[1].includes("[") && this.LETTERS.test(loop[1]) ){ // variable having an array
let temp = loop[1].replace(/[[|]|]/g,"")
let start = loop[0].replace(/[[|]|]/g,"")
if( !this.VARIABLES.has(temp) ){ throw `NameError : name "${temp}" is not defined .` }
this.VARIABLES.set(start,0)
this.ExecuteDirectForLoop(start,this.VARIABLES.get(temp),loop_script)
}
if( loop[1].includes("[[") ){ // array directly given
let start = loop[0].replace(/[[|]|]/g,"")
this.VARIABLES.set(start,0)
var loopArray = this.ArrayDeclaration(loop[1][2],loop[1]) ;
this.ExecuteDirectForLoop(start,loopArray,loop_script)
}
if( loop[1].includes("(") ){ // Range tuple given
loop[1] = loop[1].replace(/[()]/g,"").split(",")
let start = loop[0].replace(/[[|]|]/g,"")
for(let i in loop[1]){ loop[1][i] = this.ProcessData(loop[1][i]) }
this.VARIABLES.set(start,loop[1][0])
this.ExecuteRangeForLoop(loop[1][0],loop[1][1],loop[1][2],start,loop_script)
}
this.MainProgramThread(pointer,c)
}
ExecuteDirectForLoop(start,arr,loop_script){
for(let i of arr){
this.VARIABLES.set(start,i) ;
this.MainProgramThread(0,loop_script)
}
}
ExecuteRangeForLoop(start,end,inc,varValue,loop_script){
if( end === undefined ){ end = start ; start = 0 } // (10) in such range start must be 0 and end will be 10 therfore ..
if(inc === undefined){ inc = 1 } // incrementing factor is also optional parameter .
for(let i = Number(start) ; i < Number(end) ; i = i + Number(inc) ){
this.VARIABLES.set(varValue,i+1) ; this.MainProgramThread(0,loop_script)
}
}
IfInterpreter(pointer,script){
let c = script ; let CONDITION ; let ans ; let temp ; let if_script ; let t = [] ; let word = "" ;
temp = this.LoopTillGivenCharacter(pointer,"\n",c) // temprary variable
CONDITION = temp[1].replaceAll("or","||").replaceAll("and","&&").replaceAll("is","===").replaceAll("True","true").replaceAll("False","false") // replacements according to python .
pointer = temp[0] ;
for(let i = 0 ; i < CONDITION.length ; i++){
if(this.LETTERS.test(CONDITION[i])){ word += CONDITION[i] }
else{
t.push(word)
t.push(CONDITION[i])
word = ""
}
if(i === CONDITION.length-1){ t.push(word) } // at last point we will add the word to the temp array anyways .
}
CONDITION = t.filter(function(str) { return /\S/.test(str); });
for(let i in CONDITION){
if(this.LETTERS.test(CONDITION[i])){
CONDITION[i] = this.ProcessData(CONDITION[i])
}
}
ans = eval(CONDITION.join("")) // I could have used eval for arithematic also but I was enjoying coding that part by myself, till this point I got little bored :)
temp = this.LoopTillGivenCharacter(pointer,"?",c,"Syntax Error : if statement never ended missing '?' . ",true)
pointer = temp[0]+2 ; if_script = temp[1]
if(ans){ this.MainProgramThread(0,if_script) }
// work pending lol !!
// else{
// let k = c[pointer]+c[pointer+1]+c[pointer+2]+c[pointer+3]
// if(k === "else"){
// let x = this.LoopTillGivenCharacter(pointer,"|",c,"Syntax Error : else statement never ended missing '|' .",true)
// pointer = x[0]
// this.MainProgramThread(0,x[1])
// }
// }
this.MainProgramThread(pointer,c)
}
}
let LANGUAGE_START1 = new RadhaProgrammingLanguage(`
[num = 90 ] # integer
[str = "krishna" ] # string
[cap_str = {capitalize(str)} ] # function
[con = ((1>0)) ] # conditional / boolean -> True
[list = [[1,2,3,4]] ] # list
[dict = {{"num":23,"age":19}} ] # dictionary
[age = dict[age] ] # dictionary property / item
[arr_ele = list[2] ] # list item
def FizzBuzz(num)
if num % 3 is 0 and num % 5 is 0
[ans = "FizzBuzz"]
?
if num % 3 is 0 and num % 5 != 0
[ans = "Fizz"]
?
if num % 3 != 0 and num % 5 is 0
[ans = "Buzz"]
?
if num % 3 != 0 and num % 5 != 0
[ans = "NoFizzNoBuzz"]
?
ret: ans: # ("ret:" mean's "return")
;
[fn = {FizzBuzz(15)} ] # function
{print("num","=",num)}
{print("str","=",str)}
{print("cap_str","=",cap_str)}
{print(con)}
{print("list","=",list)}
{print(dict)}
{print(age)}
{print(arr_ele)}
{print("Hello","World",str)}
{print(num+age+arr_ele)}
{print(fn)}
`)
//---------------------------OUTPUT---------------------------//
// num = 15
// str = krishna
// cap_str = KRISHNA
// true
// list = 1 2 3 4
// {num: 23, age: 19}
// 19
// 3
// Hello World krishna
// 37
// FizzBuzz
//----------------------------END-----------------------------//