Fixed values handling

samples/hello.brc

@@ -1,9 +1,9 @@
-@extern putchar fun: character sint32 -> sint32
+@extern putchar fun: character u32 -> u32
 
-main fun -> sint32
-    text data<sint32> <- "Hello, world!\n"
+main fun -> u32
+    text data<u32> <- "Hello, world!\n"
     
-    rep i sint32 <- 0, text[i] != 0:
+    rep i u32 <- 0, text[i] != 0:
         putchar(text[i])
         i <- i + 1
     ;

samples/test.brc

@@ -49,11 +49,13 @@ i u32 <- 0, rep text[i] != 0:
 ;*/
 
 main fun -> u32
-    /*num1 u8 <- 42
+    num1 u8 <- 42
     num2 s8 <- 3 - +15
     num3 u32 <- 1234123
-    num4 s32 <- -345345*/
+    num4 s32 <- -345345
     num5 r32 <- -42.58
 
+    num5 + num3
+
     ret 0
 ;