Dev (#777)

* The new @if directive.

resources/testfragments/parsertest.c3

@@ -1,242 +0,0 @@
-module foo <$foo, #bar, Integer>;
-import bar as eok local;
-import bar2 as eok2;
-import bar3 local;
-
-macro void @foo(int i, $e)
-{
-    $e = 1;
-    printf("Helo");
-}
-macro @goo(i, $e)
-{
-
-}
-
-struct Foo
-{
-    $if $use_bar > 0:
-    {
-        int bar;
-    }
-    int baz;
-}
-
-
-macro @soom!(i, $e)
-{}
-
-local struct Foom
-{
-	int i;
-	Foom *test;
-	int*** j;
-	int*[][]* k;
-}
-
-struct Hej
-{
-	int x;
-}
-
-enum FEok : int {
-	IFEJ
-}
-
-
-enum Test
-{
-    FOO = 1 + 2,
-	BAR,
-}
-
-enum Test2 : int
-{
-	FOO = 1,
-	BAR,
-}
-
-union Foomt
-{
-	int i;
-	double d;
-}
-
-error Errors
-{
-	BADERROR,
-	OTHER_ERROR
-}
-
-fn Foom test(int a)
-{
-	while (int x = 0, int y = 3; int y = foo())
-	{
-		a++;
-	}
-	while (int x = 0)
-	{
-		a++;
-	}
-	while (int x, y = 3; x > 0 && b < 0)
-	{
-		a++;
-	}
-	return 1 + 2;
-}
-
-fn boo::Bar zab::Baz.sd(die::Eij i) throws Zab // , sij:Zig
-{
-	float a = 0, b = 3, double c = 1, d;
-	int i = 0;
-}
-
-generic int boor(i)
-{
-    case int:
-        return 1;
-    case double:
-        return 100;
-    default:
-        return 1000;
-}
-
-generic boor2(i)
-{
-    case int:
-        return "Helo";
-    default:
-        return 10001;
-}
-
-$switch
-
-$case $e > 0:
-{
-    fn void foo() {}
-}
-$case $e < 0:
-{
-    fn void foo() { printf("HELO"); }
-}
-$default:
-{
-    fn void foo() { printf("OLEH"); }
-}
-$endswitch
-
-$if $e > 0:
-{
-    fn void foo() {}
-}
-
-$if $b > 0:
-{
-}
-$else
-{
-    generic test(i) { }
-}
-
-#if $b > 0
-
-#else
-
-#endif
-
-generic boofer2(i, g, eok)
-{
-    case int, String, type($eoo)
-        return "Helo";
-    default
-        return 1000;
-}
-
-
-
-fn void hello() throws Errors
-{
-	int i, j;
-	throw FOO;
-	throw awesome::FOO;
-	defer close(b);
-	foo::Bar x = 3;
-	try foo();
-	try foo() else 1;
-	foo(try 1);
-    type($error) fk;
-	type(int).size + fk;
-	Errors {};
-	Ferrors{a = 1, b = 20, b = { token }};
-	Ferrors{1, 3, 1+4};
-	$erro = 1;
-	FOO:
-	goto FOO;
-	type($error) fk;
-	foo::@macrof();
-	int i = foo ? 2 : 4;
-	@macros();
-	type(foo::y) z;
-	type(int) * 2;
-	$error = type(int);
-	double[4] a;
-	foo[1 + 2] * b;
-	type((i > 0) ? type(int) : type(double)) doek;
-	$e = type(type(type(Bar)));
-	$e = foo ? type(int) : type(Bar);
-	$e = type(type(foo::$eofk));
-	if (a == 0 && 1 == b)
-	{
-		i = 0;
-	}
-	while (bpb >= 3)
-	{
-	    a();
-	}
-	do
-	{
-	} while (0);
-	for (i = 0;;)
-	{}
-	for (i = 0, j = 3; i < 0; i++, j++) {}
-	for (int i = 0; i < 100; i++)
-	{
-	    i++;
-	}
-	int i = 1;
-	i + 1 * 100;
-	&i;
-	int j = i;
-	2;
-	i++;
-	switch (int foo = 1; bar)
-	{
-	    case 1:
-	        next;
-	        continue;
-	    default:
-	       break;
-	}
-	do {
-		i++;
-	} while (a < 0);
-	while (a > 0)
-	{
-		a--;
-	}
-	while (int a = 4; int b = 20)
-	{
-	    a + 1;
-	}
-	return;
-}
-
-def Foo* as Bar;
-def fn void(int, Foo*) as Zoo;
-
-
-
-fn void test2()
-{
-	return;
-}

resources/testproject/hello_world.c3

@@ -1,14 +1,9 @@
 module hello_world;
 import std;
 import bar;
-$if env::os_is_win32():
-fn int test_doubler(int x)
-{
-	return x * x;
-}
-$else
-extern fn int test_doubler(int);
-$endif
+
+fn int test_doubler(int x) @if(env::WIN32) => x * x;
+extern fn int test_doubler(int) @if(!env::WIN32);
 extern fn void printf(char *, ...);
 
 fn int main()