diff --git a/nac3core/src/toplevel/composer.rs b/nac3core/src/toplevel/composer.rs
index e13cb958..32230729 100644
--- a/nac3core/src/toplevel/composer.rs
+++ b/nac3core/src/toplevel/composer.rs
@@ -41,7 +41,8 @@ impl TopLevelComposer {
         let int32 = primitives.0.int32;
         let int64 = primitives.0.int64;
         let float = primitives.0.float;
-        let num_ty = primitives.1.get_fresh_var_with_range(&[int32, int64, float]);
+        let boolean = primitives.0.bool;
+        let num_ty = primitives.1.get_fresh_var_with_range(&[int32, int64, float, boolean]);
         let var_map: HashMap<_, _> = vec![(num_ty.1, num_ty.0)].into_iter().collect();
 
         let mut definition_ast_list = {
@@ -83,9 +84,20 @@ impl TopLevelComposer {
                             let int32 = ctx.primitives.int32;
                             let int64 = ctx.primitives.int64;
                             let float = ctx.primitives.float;
+                            let boolean = ctx.primitives.bool;
                             let arg_ty = fun.0.args[0].ty;
                             let arg = args[0].1;
-                            if ctx.unifier.unioned(arg_ty, int32) {
+                            if ctx.unifier.unioned(arg_ty, boolean) {
+                                Some(
+                                    ctx.builder
+                                        .build_int_s_extend(
+                                            arg.into_int_value(),
+                                            ctx.ctx.i32_type(),
+                                            "sext",
+                                        )
+                                        .into(),
+                                )
+                            } else if ctx.unifier.unioned(arg_ty, int32) {
                                 Some(arg)
                             } else if ctx.unifier.unioned(arg_ty, int64) {
                                 Some(
@@ -130,9 +142,12 @@ impl TopLevelComposer {
                             let int32 = ctx.primitives.int32;
                             let int64 = ctx.primitives.int64;
                             let float = ctx.primitives.float;
+                            let boolean = ctx.primitives.bool;
                             let arg_ty = fun.0.args[0].ty;
                             let arg = args[0].1;
-                            if ctx.unifier.unioned(arg_ty, int32) {
+                            if ctx.unifier.unioned(arg_ty, boolean)
+                                || ctx.unifier.unioned(arg_ty, int32)
+                            {
                                 Some(
                                     ctx.builder
                                         .build_int_s_extend(
@@ -176,10 +191,12 @@ impl TopLevelComposer {
                         |ctx, _, fun, args| {
                             let int32 = ctx.primitives.int32;
                             let int64 = ctx.primitives.int64;
+                            let boolean = ctx.primitives.bool;
                             let float = ctx.primitives.float;
                             let arg_ty = fun.0.args[0].ty;
                             let arg = args[0].1;
-                            if ctx.unifier.unioned(arg_ty, int32)
+                            if ctx.unifier.unioned(arg_ty, boolean)
+                                || ctx.unifier.unioned(arg_ty, int32)
                                 || ctx.unifier.unioned(arg_ty, int64)
                             {
                                 let arg = args[0].1.into_int_value();
@@ -489,11 +506,7 @@ impl TopLevelComposer {
                     self.definition_ast_list.push((def, Some(ast)));
                 }
 
-                let result_ty = if contains_constructor {
-                    Some(constructor_ty)
-                } else {
-                    None
-                };
+                let result_ty = if contains_constructor { Some(constructor_ty) } else { None };
                 Ok((class_name, DefinitionId(class_def_id), result_ty))
             }
 
@@ -904,11 +917,12 @@ impl TopLevelComposer {
                                     .node
                                     .annotation
                                     .as_ref()
-                                    .ok_or_else(|| format!(
-                                        "function parameter `{}` at {} need type annotation",
-                                        x.node.arg,
-                                        x.location
-                                    ))?
+                                    .ok_or_else(|| {
+                                        format!(
+                                            "function parameter `{}` at {} need type annotation",
+                                            x.node.arg, x.location
+                                        )
+                                    })?
                                     .as_ref();
 
                                 let type_annotation = parse_ast_to_type_annotation_kinds(
@@ -1110,11 +1124,12 @@ impl TopLevelComposer {
                                         .node
                                         .annotation
                                         .as_ref()
-                                        .ok_or_else(|| format!(
-                                            "type annotation for `{}` at {} needed",
-                                            x.node.arg,
-                                            x.location
-                                        ))?
+                                        .ok_or_else(|| {
+                                            format!(
+                                                "type annotation for `{}` at {} needed",
+                                                x.node.arg, x.location
+                                            )
+                                        })?
                                         .as_ref();
                                     parse_ast_to_type_annotation_kinds(
                                         class_resolver.as_ref(),
@@ -1629,7 +1644,9 @@ impl TopLevelComposer {
                             let ret_str = self.unifier.stringify(
                                 inst_ret,
                                 &mut |id| {
-                                    if let TopLevelDef::Class { name, .. } = &*def_ast_list[id].0.read() {
+                                    if let TopLevelDef::Class { name, .. } =
+                                        &*def_ast_list[id].0.read()
+                                    {
                                         name.to_string()
                                     } else {
                                         unreachable!("must be class id here")
@@ -1639,7 +1656,9 @@ impl TopLevelComposer {
                             );
                             return Err(format!(
                                 "expected return type of `{}` in function `{}` at {}",
-                                ret_str, name, ast.as_ref().unwrap().location
+                                ret_str,
+                                name,
+                                ast.as_ref().unwrap().location
                             ));
                         }