Language Design

gistfile1.txt

Declaration
____________

// variable
a: int; // <var-id>: <type-id>;
b: int = 15; // <var-id>: <type-id> = <expr>;

// constant variable (must be initialized first)
let ca: int = 15; // let <var-id>: <type-id> = <expr>;

// Array
arr0: int[4]; // <var-id>: <type-id>[<num-elements>];
arr1: int[4] = [1, 2, 3, 4]; // <var-id>: <type-id>[<num-elements>] = <array-init>;
arr2: int[] = [1, 2, 3, 4] = // <var-id>: <type-id>[] = <array-init>;

// Constant array
let arr1: int[4] = [1, 2, 3, 4]; // let <var-id>: <type-id>[<num-elements>] = <array-init>;
let arr2: int[] = [1, 2, 3, 4] = // let <var-id>: <type-id>[] = <array-init>;

// Function
myFunc0: void()
{
	// what else...
}

// Function with params and its return
myFunc1: int(a: int, b: int)
{
	return a + b;
}

// function Grammar
<func-id>: <type-id>(<var-decl>,...) <stmts>

// User-defined type (Structure/Record)
myType0: struct
{
	a: int;
	b: int[4];
	c: char;
	...
};

// struct Grammar
<type-id>: struct
{
	<var-decl>;
	...
};

// Class
// TO BE IMPLEMENTED

Control Flow & Loops
____________________

The grammar will be available later
Still not done yet

// IF statement
if (a == b)
{
	// ...
}

// IF-ELSE statement
if (a == b)
{
	// ...
}
else
{
	// ...
}

// IF-ELSE IF statement
if (a == b)
{
	// ...
}
else if (a != b)
{
	// ...
}

// IF-ELSE IF-ELSE statement
if (a == b)
{
	// ...
}
else if (a != b)
{
	// ...
}
else
{
	// ...
}

// Switch statement
a: int = 2;
caseof (a)
{
	when 1 =>
		// ...
	when 2 =>
		// ...
	else =>
		// ...
}

// Switch statement as an if-else alternative

a: int = 1;
b: int = 2;
caseof (true)
{
	when (a > b) =>
		// ...
	when (a < b) =>
		// ...
	else =>
		// ...
}

// Switch statement that can assign into a variable
c: char = 'a';
a: int;
a = caseof (c) {
	when 'a' =>
		return 1;
	when 'b' =>
		return 2;
	else =>
		return 3;
};

// Infinite loop
loop
{
  // ...
}

// While loop
while (/* expression */)
{
	// ...
}

// Do-while loop
do
{
	// ...
} while (/* expression */);

// C-style For loop
for (/*stmt1*/;/*stmt2*/;/*stmt3*/)
{
	// ...
}

// Range based for loop
for (a: int = 0; a upto 100)
{
	
}

Macro
_____

NOT DONE YET

// defining constant
[$define MYDEF 1]

// defining macro function
[$define MYFUNC(x) x + x]

// If statement for macro
// Must be ended with [$endif]

// standard IF macro
[$if defined(MYDEF) && MYDEF == 1]
// ...
[$endif]

// If defined
[$ifdef MYDEF]
// ...
[$endif]

// If NOT defined
[$ifndef MYDEF]
// ...
[$endif]