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Falcon Programming Language - Version 1.2.4

Eric Buehler 2022

Falcon is a multithreaded, multi-paradigm interpreted programming language, with a strong focus on readability and simplicity. It is both strongly and dynamically typed, and has automatic garbage collection based on reference counting and a tri-generational garbage collector. In comparison to other languages, it a hybrid of Python and C, with the benefits of Python and the syntax of C.

Documentation

Sample Program

Program 
m="Placeholder value"

class Falcon{
    var=m
    func sound(self){
        print("Sound!")
    }
}


class Peregrine(Falcon){
    var=m
    func __new__(self){
        print("__new__ called")
        return super(self).__new__(self)
    }
    func __init__(self){
        print(self)
    }
    func f(self){
        print(self.var)
    }
}

x=Peregrine()

y=Peregrine()

a=Peregrine.var
x.var=5
y.var="Value"
b=x.var

x.f()
y.f()

x.sound()

print(x.__bases__)

func f(x,c="A"){
    print("Function f says: ","")
    print(c)
}

f(1)



dictionary={1:[1,2,3], 2:{1:"A"}, "Hello":"World", [123]:2}

l=list(1,2,3,4,5)

x=object()
y=object()


true = x == y
maybe = x is y
same = x is x
print(500==500)


print("Done")

print(l[3])
print(dictionary[[123]])


try{
    if 500 is 200{
        raise Exception("500 is not the same object as 200")
    }
    elif 500 is 500{
        raise TypeError("500 is not the same object as 200, but is the same as 500")
    }
    else{
        raise NameError("Else condition reached")
    }
}
except Exception e{
    print(e)
}

i=0

func x(){
    i=i+1

    print(i)
    if (i==3){
        raise ValueError("I is 50!")
    }
    x()
}

try{
    x()
}
except Exception e{
    print(e)
}

val=2
print(val.__mul__(5))

func fib(n){
    if (n<=1){
        return n
    }
    else{
        return fib(n-1)+fib(n-2)
    }
}

print(fib(10))

pi=238649.2131693410000000
x=pi*100
print(str(pi))
print(int("1234"))
print(float("10.222"))

for n in [10,20,30]{
    print(n)
}

i=0
while i<10{
    print(i)
    i+=1
}

print(True and False)
print(True or False)
print(not 1==1)

print(100^2)
print(100^2*3)
print(100^6)

When run with ./fpl.exe program.fpl

Output 
__new__ called        
<Peregrine @ 0xba7a98>
__new__ called        
<Peregrine @ 0xba7b40>
5
Value
Sound!
[<class 'Falcon'>, <class 'object'>]
Function f says:  
A
True
Done
4
2
500 is not the same object as 200, but is the same as 500
1
2
3
I is 50!
10
55
238649.213169341
1234
10.222
10
20
30
False
True
False
102
98
98

Click here for more example programs.

Usage

Build Falcon in debug mode ./build.cmd

Build Falcon in release mode ./release.cmd

Run a script falcon program

Manual compilation g++ main.cpp -o falcon -static-libstdc++ -static -lws2_32 -O3 -fno-gcse

Enter REPL falcon

Help falcon -h

Links

Licenses