README.md

Sugar

A transpiler to make Java a little less bitter.

Features

• Implicit main method + Main class.

// This is a vaid program!
{
}

• Implicit Main static method declarations.

int demoFunc() {   // public static int demoFunc() {
  return -1;       //   return -1;
}                  // }

• Implicit Scanner.

line(l);           // String l = scan.nextLine();
int a = int()-1;   // int i = scan.nextInt()-1;
str(s1,s2);        // String s1 = scan.next(), s2 = scan.next();

• Simpler print statements. debug statements by sugarpdbg.

print("asdf");           // System.out.print("asdf");
eprintln("foo");         // System.err.println("foo");
printf("%s\n", "bar");   // System.out.printf("%s\n", "bar");

// Requires sugarpdbg
debug(a, b, c);   // System.err.println("a:"+a+" b:"+b+" c:"+c);

• Ranged for loops. loop loops, by sugarplop, determine variable names by indentation level (i, j, k, l, o, and u).

for (i,10) { println(i); }     // for (int i = 0; i < 10; i++) { ... }
for (j,1,11) { println(j); }   // for (int j = 1; j < 11; j++) { ... }

// Requires sugarplop
loop (10) {                    // for (int i = 0; i < 10; i++) {
  loop (5,9) {                 //   for (int j = 5; j < 9; j++) {
    println(i+" "+j);          //     ...
  }                            //   }
}                              // }

• Easier Object and array declarations.

new(ArrayList<HashMap<Integer,String>>, a)();   // ArrayList<HashMap<Integer>> a = new ArrayList<...>();
new(int, b, 10);                                // int[] b = new int[10];
new(int, c, 10, 20);                            // int[][] c = new int[10][20];

• Easier class definition (further enhanced by sugarpctr and sugarptpl).

class Foo {                   // pulic static class Foo {
  .int b;                     //   public int b;
  (int a, int b) { c=a+b; }   //   public Foo(int a, int b) { c=a+c; }
}                             // }

// Requires sugarpctr
class ImplicitFields {   // public static class ImplicitFields {
  (int a, int b);        //   public int a;
                         //   public int b;
                         //   public ImplicitFields(int a_, int b_) { a=a_; b=b_; }
}                        // }

// Requires sugarptpl
tuple Tuple(Object a, int b);
ctuple ComparableTuple(String a, int b);

• Other small sugar.

new(int,a,5);                        // int[] a = new int[5];
println(ats(a));                     // System.out.println(Arrays.toString(a));
int b = 5, c = 10;                   // int b = 5, c = 10;
swap(a,b);                           // b=b^c^(c=b);
BI.valueOf(b).gcd(BI.valueOf(c));    // BigInteger.valueOf(b).gcd(BigInteger.valueOf(c));

Installation (Recommended Order)

• Create all files and set appropriate permissions. Estimated time: 1 minute.

echo 'export PATH=$PATH:~/sugar' >> .bashrc
mkdir sugar
cd sugar
touch sugar{,head,ptpl,pctr,plop,pdbg}
for i in sugar*; do echo cat > $i; done
chmod +x sugar*

• Copy sugar. Estimated time: 5 minutes.
• Copy sugarhead. Estimated time: 5 minutes.
  • At this point, you sugar is minimially functional. Below modules may optionally be added for more sugar.
• Create Python templates. Estimated time: 1 minute.

for i in sugarp*; do echo -e '#!/usr/bin/python2
import sys, re, os
def f(m):
  pass
for l in list(sys.stdin):
  print re.sub(r"asdf", f, l[:-1])' > $i;
done

• Copy sugarpdbg. Estimated time: 1 minute.
• Copy sugarpctr. Estimated time: 2 minutes.
• Copy sugarplop. Estimated time: 1 minute.
• Copy sugarptpl. Estimated time: 8 minutes. Note: Requires sugarpctor.
• For vim users, add the following to .vimrc:

au BufRead,BufNewFile *.sugar setfiletype java

• ...and if you want to be fancy, in ~/.vim/after/syntax/java.vim:

syn keyword Keyword loop debug tuple ctuple print println printf eprint eprintf eprintln str line