gas: Compile boolean variable assignment

When the assignment value is a literal, it just assigns zero or one to
the variable stack's location. If the value is an expression, it
compiles the expression and assign zeros and ones based on expression
result.

1 files changed, 16 insertions, 2 deletions

diff --git a/examples/if.pipa b/examples/if.pipa
index d65fc24..79f5724 100644
--- a/examples/if.pipa
+++ b/examples/if.pipa
@@ -1,6 +1,18 @@
 fn main(): i32 {
   let n: i32 = 11;
 
+  let falsy: bool = false || n == 11 && n > 11;
+  let truth: bool = n + 1 > 11 && n - 1 < 11;
+  let literal_falsy: bool = false;
+
+  if falsy {
+    return 201;
+  }
+
+  if literal_falsy {
+    return 200;
+  }
+
   if (n == 11) {
     if n != 12 {
       if n < 12 {
@@ -15,7 +27,6 @@ fn main(): i32 {
                   if false || false {
                     return 199;
                   }
-
                   if true || false {
                     if false || true {
                       if true && false {
@@ -32,7 +43,10 @@ fn main(): i32 {
                           if false || n >= 11 && n <= 11 {
                             if false || false && false && false || true {
                               if n + 1 > 11 && n - 1 < 11 {
-                                return 42;
+                                if truth {
+                                  return 42;
+                                }
+                                return 14;
                               }
                               return 13;
                             }