Add #[must_use] on builders

src/menus.rs

@@ -4,6 +4,7 @@ use std::ptr;
 
 use super::{Ui, ImStr};
 
+#[must_use]
 pub struct Menu<'ui, 'p> {
     label: ImStr<'p>,
     enabled: bool,
@@ -34,6 +35,7 @@ impl<'ui, 'p> Menu<'ui, 'p> {
     }
 }
 
+#[must_use]
 pub struct MenuItem<'ui, 'p> {
     label: ImStr<'p>,
     shortcut: Option<ImStr<'p>>,

src/sliders.rs

@@ -5,6 +5,7 @@ use super::{Ui, ImStr};
 
 // TODO: Consider using Range, even though it is half-open
 
+#[must_use]
 pub struct SliderInt<'ui, 'p> {
     label: ImStr<'p>,
     value: &'p mut i32,
@@ -41,6 +42,7 @@ impl<'ui, 'p> SliderInt<'ui, 'p> {
     }
 }
 
+#[must_use]
 pub struct SliderFloat<'ui, 'p> {
     label: ImStr<'p>,
     value: &'p mut f32,

src/trees.rs

@@ -3,6 +3,7 @@ use std::marker::PhantomData;
 
 use super::{Ui, ImGuiSetCond, ImStr};
 
+#[must_use]
 pub struct TreeNode<'ui, 'p> {
     id: ImStr<'p>,
     label: Option<ImStr<'p>>,

src/widgets.rs

@@ -4,6 +4,7 @@ use std::ptr;
 
 use super::{Ui, ImStr};
 
+#[must_use]
 pub struct CollapsingHeader<'ui, 'p> {
     label: ImStr<'p>,
     str_id: Option<ImStr<'p>>,

src/window.rs

@@ -13,6 +13,7 @@ use super::{
     ImStr, ImVec2
 };
 
+#[must_use]
 pub struct Window<'ui, 'p> {
     pos: (f32, f32),
     pos_cond: ImGuiSetCond,