Display Type::Boolean as bool, not boolean.

Leo calls this `bool`, so it's potentially confusing when error
messages say `boolean`.

compiler/ast/src/types/type_.rs

@@ -184,7 +184,7 @@ impl fmt::Display for Type {
         match *self {
             Type::Address => write!(f, "address"),
             Type::Array(ref array_type) => write!(f, "{array_type}"),
-            Type::Boolean => write!(f, "boolean"),
+            Type::Boolean => write!(f, "bool"),
             Type::Field => write!(f, "field"),
             Type::Future(ref future_type) => write!(f, "{future_type}"),
             Type::Group => write!(f, "group"),

compiler/passes/src/code_generation/visit_expressions.rs

@@ -148,8 +148,10 @@ impl<'a> CodeGenerator<'a> {
         // Increment the register counter.
         self.next_register += 1;
 
-        let cast_instruction =
-            format!("    cast {expression_operand} into {destination_register} as {};\n", input.type_);
+        let cast_instruction = format!(
+            "    cast {expression_operand} into {destination_register} as {};\n",
+            Self::visit_type(&input.type_)
+        );
 
         // Concatenate the instructions.
         instructions.push_str(&cast_instruction);

compiler/passes/src/code_generation/visit_type.rs

@@ -22,7 +22,6 @@ impl<'a> CodeGenerator<'a> {
     pub(crate) fn visit_type(input: &Type) -> String {
         match input {
             Type::Address
-            | Type::Boolean
             | Type::Field
             | Type::Group
             | Type::Scalar
@@ -32,6 +31,10 @@ impl<'a> CodeGenerator<'a> {
             | Type::Composite(..)
             | Type::Identifier(..)
             | Type::Integer(..) => format!("{input}"),
+            Type::Boolean => {
+                // Leo calls this just `bool`, which isn't what we need.
+                "boolean".into()
+            }
             Type::Array(array_type) => {
                 format!("[{}; {}u32]", Self::visit_type(array_type.element_type()), array_type.length())
             }

tests/expectations/compiler/array/array_initialization_fail.out

@@ -2,4 +2,4 @@
 namespace: Compile
 expectation: Fail
 outputs:
-  - "Error [ETYC0372003]: Expected type `[boolean; 8]` but type `[boolean; 7]` was found\n    --> compiler-test:5:16\n     |\n   5 |         return [a, a, a, a, a, a, a];\n     |                ^^^^^^^^^^^^^^^^^^^^^\nError [ETYC0372003]: Expected type `u8` but type `u32` was found\n    --> compiler-test:9:52\n     |\n   9 |         return [1u8, 2u8, 3u8, 4u8, 5u8, 6u8, 7u8, 8u32];\n     |                                                    ^^^^\n"
+  - "Error [ETYC0372003]: Expected type `[bool; 8]` but type `[bool; 7]` was found\n    --> compiler-test:5:16\n     |\n   5 |         return [a, a, a, a, a, a, a];\n     |                ^^^^^^^^^^^^^^^^^^^^^\nError [ETYC0372003]: Expected type `u8` but type `u32` was found\n    --> compiler-test:9:52\n     |\n   9 |         return [1u8, 2u8, 3u8, 4u8, 5u8, 6u8, 7u8, 8u32];\n     |                                                    ^^^^\n"

tests/expectations/compiler/expression/cast_fail.out

@@ -2,4 +2,4 @@
 namespace: Compile
 expectation: Fail
 outputs:
-  - "Error [ETYC0372045]: Strings are not yet supported.\n    --> compiler-test:13:9\n     |\n  13 |         let b: string = a as string;\n     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^\nError [ETYC0372007]: Expected one type from `field, group, scalar, i8, i16, i32, i64, i128, u8, u16, u32, u64, u128, boolean, address`, but got `string`\n    --> compiler-test:13:25\n     |\n  13 |         let b: string = a as string;\n     |                         ^^^^^^^^^^^\nError [ETYC0372007]: Expected one type from `field, group, scalar, i8, i16, i32, i64, i128, u8, u16, u32, u64, u128, boolean, address`, but got `Foo`\n    --> compiler-test:16:24\n     |\n  16 |         let d: field = c as field;\n     |                        ^\nError [ETYC0372007]: Expected one type from `field, group, scalar, i8, i16, i32, i64, i128, u8, u16, u32, u64, u128, boolean, address`, but got `(field,field)`\n    --> compiler-test:19:24\n     |\n  19 |         let f: field = e as field;\n     |                        ^\nError [ETYC0372007]: Expected one type from `field, group, scalar, i8, i16, i32, i64, i128, u8, u16, u32, u64, u128, boolean, address`, but got `(field => field)`\n    --> compiler-test:25:24\n     |\n  25 |         let b: field = balances as field;\n     |                        ^^^^^^^^\n"
+  - "Error [ETYC0372045]: Strings are not yet supported.\n    --> compiler-test:13:9\n     |\n  13 |         let b: string = a as string;\n     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^\nError [ETYC0372007]: Expected one type from `field, group, scalar, i8, i16, i32, i64, i128, u8, u16, u32, u64, u128, bool, address`, but got `string`\n    --> compiler-test:13:25\n     |\n  13 |         let b: string = a as string;\n     |                         ^^^^^^^^^^^\nError [ETYC0372007]: Expected one type from `field, group, scalar, i8, i16, i32, i64, i128, u8, u16, u32, u64, u128, bool, address`, but got `Foo`\n    --> compiler-test:16:24\n     |\n  16 |         let d: field = c as field;\n     |                        ^\nError [ETYC0372007]: Expected one type from `field, group, scalar, i8, i16, i32, i64, i128, u8, u16, u32, u64, u128, bool, address`, but got `(field,field)`\n    --> compiler-test:19:24\n     |\n  19 |         let f: field = e as field;\n     |                        ^\nError [ETYC0372007]: Expected one type from `field, group, scalar, i8, i16, i32, i64, i128, u8, u16, u32, u64, u128, bool, address`, but got `(field => field)`\n    --> compiler-test:25:24\n     |\n  25 |         let b: field = balances as field;\n     |                        ^^^^^^^^\n"

tests/expectations/compiler/finalize/get_incorrect_type_fail.out

@@ -2,4 +2,4 @@
 namespace: Compile
 expectation: Fail
 outputs:
-  - "Error [ETYC0372031]: A mapping's value cannot be a record\n    --> compiler-test:10:5\n     |\n  10 |     mapping tokens: address => Token;\n     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nError [ETYC0372003]: Expected type `address` but type `boolean` was found\n    --> compiler-test:17:30\n     |\n  17 |         Mapping::get(tokens, true);\n     |                              ^^^^\nError [ETYC0372003]: Expected type `address` but type `boolean` was found\n    --> compiler-test:18:20\n     |\n  18 |         tokens.get(true);\n     |                    ^^^^\nError [ETYC0372003]: Expected type `address` but type `u8` was found\n    --> compiler-test:19:31\n     |\n  19 |         Mapping::get(amounts, 1u8);\n     |                               ^^^\nError [ETYC0372003]: Expected type `address` but type `u8` was found\n    --> compiler-test:20:21\n     |\n  20 |         amounts.get(1u8);\n     |                     ^^^\n"
+  - "Error [ETYC0372031]: A mapping's value cannot be a record\n    --> compiler-test:10:5\n     |\n  10 |     mapping tokens: address => Token;\n     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nError [ETYC0372003]: Expected type `address` but type `bool` was found\n    --> compiler-test:17:30\n     |\n  17 |         Mapping::get(tokens, true);\n     |                              ^^^^\nError [ETYC0372003]: Expected type `address` but type `bool` was found\n    --> compiler-test:18:20\n     |\n  18 |         tokens.get(true);\n     |                    ^^^^\nError [ETYC0372003]: Expected type `address` but type `u8` was found\n    --> compiler-test:19:31\n     |\n  19 |         Mapping::get(amounts, 1u8);\n     |                               ^^^\nError [ETYC0372003]: Expected type `address` but type `u8` was found\n    --> compiler-test:20:21\n     |\n  20 |         amounts.get(1u8);\n     |                     ^^^\n"

tests/expectations/compiler/statements/assign_ternary.out

@@ -2,4 +2,4 @@
 namespace: Compile
 expectation: Fail
 outputs:
-  - "Error [ETYC0372003]: Expected type `boolean` but type `u32` was found\n    --> compiler-test:5:30\n     |\n   5 |         let x: bool = true ? x: true;\n     |                              ^\nError [EAST0372009]: variable `x` shadowed by\n    --> compiler-test:5:13\n     |\n   5 |         let x: bool = true ? x: true;\n     |             ^\nError [ETYC0372083]: A program must have at least one transition function.\n    --> compiler-test:1:1\n     |\n   1 | \n   2 | \n   3 | program test.aleo {    \n     | ^^^^^^^^^^^^\n"
+  - "Error [ETYC0372003]: Expected type `bool` but type `u32` was found\n    --> compiler-test:5:30\n     |\n   5 |         let x: bool = true ? x: true;\n     |                              ^\nError [EAST0372009]: variable `x` shadowed by\n    --> compiler-test:5:13\n     |\n   5 |         let x: bool = true ? x: true;\n     |             ^\nError [ETYC0372083]: A program must have at least one transition function.\n    --> compiler-test:1:1\n     |\n   1 | \n   2 | \n   3 | program test.aleo {    \n     | ^^^^^^^^^^^^\n"

tests/expectations/compiler/tuple/declare_fail.out

@@ -2,4 +2,4 @@
 namespace: Compile
 expectation: Fail
 outputs:
-  - "Error [ETYC0372003]: Expected type `boolean` but type `u64` was found\n    --> compiler-test:5:35\n     |\n   5 |         let t: (bool, bool) = (a, 1u64); // We should be declaring to a boolean, not a u64.\n     |                                   ^^^^\n"
+  - "Error [ETYC0372003]: Expected type `bool` but type `u64` was found\n    --> compiler-test:5:35\n     |\n   5 |         let t: (bool, bool) = (a, 1u64); // We should be declaring to a bool, not a u64.\n     |                                   ^^^^\n"

tests/expectations/compiler/tuple/return_statement_fail.out

@@ -2,4 +2,4 @@
 namespace: Compile
 expectation: Fail
 outputs:
-  - "Error [ETYC0372003]: Expected type `u64` but type `boolean` was found\n    --> compiler-test:7:24\n     |\n   7 |         return (t.0, t.1); // The second element should be type u64 as in the function declaration.\n     |                        ^\n"
+  - "Error [ETYC0372003]: Expected type `u64` but type `bool` was found\n    --> compiler-test:7:24\n     |\n   7 |         return (t.0, t.1); // The second element should be type u64 as in the function declaration.\n     |                        ^\n"

tests/expectations/compiler/tuple/type_fail.out

@@ -2,4 +2,4 @@
 namespace: Compile
 expectation: Fail
 outputs:
-  - "Error [ETYC0372003]: Expected type `u64` but type `boolean` was found\n    --> compiler-test:5:34\n     |\n   5 |         let t: (bool, u64) = (a, b); // We should expect a boolean, not a u64.\n     |                                  ^\nError [ETYC0372003]: Expected type `boolean` but type `u64` was found\n    --> compiler-test:7:24\n     |\n   7 |         return (t.0, t.1);\n     |                        ^\n"
+  - "Error [ETYC0372003]: Expected type `u64` but type `bool` was found\n    --> compiler-test:5:34\n     |\n   5 |         let t: (bool, u64) = (a, b); // We should expect a bool, not a u64.\n     |                                  ^\nError [ETYC0372003]: Expected type `bool` but type `u64` was found\n    --> compiler-test:7:24\n     |\n   7 |         return (t.0, t.1);\n     |                        ^\n"

tests/tests/compiler/tuple/declare_fail.leo

@@ -5,7 +5,7 @@ expectation: Fail
 
 program test.aleo {    
     transition main(a: bool, b: bool) -> (bool, bool) {
-        let t: (bool, bool) = (a, 1u64); // We should be declaring to a boolean, not a u64.
+        let t: (bool, bool) = (a, 1u64); // We should be declaring to a bool, not a u64.
 
         return (t.0, t.1);
     }

tests/tests/compiler/tuple/type_fail.leo

@@ -5,7 +5,7 @@ expectation: Fail
 
 program test.aleo {    
     transition main(a: bool, b: bool) -> (bool, bool) {
-        let t: (bool, u64) = (a, b); // We should expect a boolean, not a u64.
+        let t: (bool, u64) = (a, b); // We should expect a bool, not a u64.
 
         return (t.0, t.1);
     }