WPL.py

"""
my FIRST attempt at writting a language interpreter
here we go
"""

d = {}
def calc(line):
    calculated = False
    while not calculated:
        calculated = True
        if line.count("+") or line.count("-") or line.count("=") or line.count("*") or line.count(">") or line.count("<") or line.count("%"):
            calculated = False

        for i, word in enumerate(line): #do calculations

            if word == "+":  #addition, works with ints and strings
                try:
                    line[i] = line[i-1]+line[i+1]
                except TypeError:
                    line[i] = str(line[i-1]) + str(line[i+1])
                del line[i+1]
                del line[i-1]

            elif word == "-": #subtraction, works with ints
                line[i] = line[i-1]-line[i+1]
                del line[i+1]
                del line[i-1]

            elif word == "*": #multiplication, strings and ints
                line[i] = line[i-1]*line[i+1]
                del line[i+1]
                del line[i-1]

            elif word == "/": #multiplication, strings and ints, rounds down
                line[i] = int(line[i-1]/line[i+1])
                del line[i+1]
                del line[i-1]

            elif word == "%": #mod, ints
                line[i] = line[i-1]%line[i+1]
                del line[i+1]
                del line[i-1]

            elif word == ">": #more then check
                if line[i-1] > line[i+1]:
                    line[i] = "true"
                else: line[i] = "false"
                del line[i+1]
                del line[i-1]

            elif word == "<": #less then check
                if line[i-1] < line[i+1]:
                    line[i] = "true"
                else: line[i] = "false"
                del line[i+1]
                del line[i-1]

            elif word == "=": #checks, works with everything
                if line[i-1] == line[i+1]:
                    line[i] = "true"
                else: line[i] = "false"
                del line[i+1]
                del line[i-1]



def read(string):
    global d
    ln = 0
    if type(string) == str:
        string = string.split("\n")
        for ln, line in enumerate(string):
            string[ln] = line.split(" ")

    try:
        for ln, line in enumerate(string):
            linnum = ln
            for i, word in enumerate(line): #make sure everything is the right data type

                try:
                    line[i] = int(line[i])   #ints
                except: pass                   #you know how it works

                if word == '"':              #Strings
                    x, s = i+1, ""             #turns everything inbetween two
                    while line[x] != '"':      #double quotes into one word
                        s += line[x]+" "       #syntax:
                        del line[x]            # " this is one word "
                    del line[x]
                    line[i] = s


            for i, word in enumerate(line): #update variables

                if word in d:                                           #if word has been defined by player,
                    try:                                                #put definition in words place
                        if line[i+1] == "->" or line[i+1] == ":":       #unless it is being reassined
                            pass
                        else:
                            for x in d[line[i]]:
                                line.insert(i+1, x)
                            del line[i]
                    except:
                        for x in d[line[i]]:
                            line.insert(i+1, x)
                        del line[i]

                if word == "while":                         #While loop
                    param = line[i+1:]                      #Syntax:
                    par = []                                #while x:
                    par.append(param+[])                    #do this
                    read(par)                               #do this
                    loop = []                               #end
                    while string[ln+1] != ["end"]:
                        loop.append(string[ln+1])
                        del string[ln+1]
                    if par[0] == ["true"]:
                        looping = True
                        while looping:
                            run = []
                            for x in loop: run.append(x + [])
                            read(run)
                            par = []
                            par.append(param+[])
                            read(par)
                            if par[0] != ["true"]:
                                looping = False
                    else: pass

                if word == "dotims":                 #dotims (do times)
                    n = int(line[i+1])               # repeats a line of code x amount of times
                    del line[i+1]                    #Syntax:
                    l=[]                             # dotims 3 code code end
                    while line[i+1] != "end":
                        l.append(line[i+1]+"")
                        del line[i+1]
                    del line[i+1]
                    for x in range(n):
                        read([l])

                elif word == ":":                     #functions
                    d[line[i-1]] = []                 #syntax:
                    x = i+1                           # name : do this ;
                    while line[x] != ";":
                        d[line[i-1]].append(line[x])
                        del line[x]
                    del line[x]
                    d[line[i-1]].reverse()

                elif word == "call":
                    line[i] = input()

                elif word == "//":                     #Comments
                    del line[i:]                       #Syntax: code code  // this is a comment

            calc(line)
            for i, word in enumerate(line): #run through, do keywords

                if word == "->":              #set variable
                    d[line[i-1]] = [line[i+1]]  #syntax:
                                                # three -> 3


                elif word == "disp": #disp prints the next word
                    print(line[i+1])

                elif word == "if":                    #if statement
                    if line[i+1] == "true":           #syntax:
                        pass                          # if true do this end
                    else:                             # if false do this end
                        x = i+2
                        while line[x] != "end":
                            del line[x]
                        del line[x]
                        del line[line.index("if")]

                elif word == "D!":
                    print(d)
                elif word == "L!":
                    print(line)
    except:
        print("Error, LN : " + str(linnum))

if __name__ == "__main__":
    cmd = ""
    while cmd != "quit":
        cmd = input("> ")
        if cmd[0:5] == "while":
            while cmd[-3:] != "end":
                cmd = cmd + "\n" + input("... ")

        read(cmd)


# I will call this language: Wesley's Programing Language or WPL