Fl-project

Abstract language description (In Russian)
Specific language description (In Russian)
Tests
Examples

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Features overview

• Single function(main)
• One scope for entire program
• Single line comments
• 3 types: Int(32 bit), Bool, String
• Literals: 0b10101, 42, 'str', "another string", True
• Operators:
  • Declaration and assignment
  • skip
  • if with optional else
  • while
  • print (prints String or Int)
• Expression
  • '+' \ '-' \ '*' \ '/' - for operands of Int type
  • '<', '>', '<=', '>=' - for operands of Int type
  • '==', '!=' - for operands of all types
  • '!', '&&', '||' - for operands of 'Bool' type

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Examples

• GCD

  main() {
      // gcd(30, 24)
      Int x = 30;
      Int y = 24;
      while (x != 0) {
          if (y < x) {
              Int tmp = y;
              y = x;
              x = tmp;
          }
          y = y - x; 
      }
      print y;
  }

• Finding sqrt

  main() {
      // finding sqrt(144) 
      Int val = 144;
      Int x = 0;
      while (x * x < val) {
          x = x + 1;
      }
      if (x * x == val) {
          print "Precise square root of val = ";
          print x;
      }
      else {
          print "Sqrt is not integer!";
      }
  }

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Build

Prerequisites

• Flex
• Bison
• LLVM
• Clang

How to compile

l_to_exec.sh *source_file* *output_binary_file*