chore: add constructor formatter

compiler/noirc_frontend/src/ast/statement.rs

@@ -161,7 +161,13 @@ impl std::hash::Hash for Ident {
 
 impl Display for Ident {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        self.0.contents.fmt(f)
+        let content = &self.0.contents;
+        let formatted_content = if content.starts_with("plain::") {
+            &content["plain::".len()..]
+        } else {
+            content
+        };
+        f.write_str(formatted_content)
     }
 }
 

tooling/nargo_fmt/Cargo.toml

@@ -10,6 +10,7 @@ bytecount = "0.6.3"
 noirc_frontend.workspace = true
 serde.workspace = true
 toml.workspace = true
+iter-extended.workspace = true
 thiserror.workspace = true
 
 [dev-dependencies]

tooling/nargo_fmt/src/visitor/expr.rs

@@ -1,3 +1,4 @@
+use iter_extended::vecmap;
 use noirc_frontend::{
     hir::resolution::errors::Span, ArrayLiteral, BlockExpression, Expression, ExpressionKind,
     Literal, Statement,
@@ -39,6 +40,15 @@ impl FmtVisitor<'_> {
                     self.format_expr(infix.rhs)
                 )
             }
+            ExpressionKind::Constructor(constructor_expr) => {
+                let type_str = constructor_expr.type_name.to_string();
+                let formatted_fields =
+                    vecmap(&constructor_expr.fields, |(field_ident, field_value)| {
+                        format!("{}: {}", field_ident, self.format_expr(field_value.clone()))
+                    })
+                    .join(", ");
+                format!("{} {{ {} }}", type_str, formatted_fields)
+            }
             ExpressionKind::Call(call_expr) => {
                 let formatted_func = self.format_expr(*call_expr.func);
                 let formatted_args = call_expr

tooling/nargo_fmt/tests/expected/constructor.nr

@@ -0,0 +1,8 @@
+struct Point {
+    x: u8,
+    y: u8,
+}
+
+fn foo() {
+    Point { x: 5, y: 10 };
+}

tooling/nargo_fmt/tests/input/constructor.nr

@@ -0,0 +1,9 @@
+struct Point {
+    x: u8,
+    y: u8,
+}
+
+fn foo() {
+    Point{x :5,
+    y:  10   };
+}