constify and deinline some methods

output/src/area.rs

@@ -6,77 +6,75 @@ pub trait Area<N: Coordinate>: From<[N;4]> + Debug + Copy {
     fn y (&self) -> N;
     fn w (&self) -> N;
     fn h (&self) -> N;
-    #[inline] fn zero () -> [N;4] {
+    fn zero () -> [N;4] {
         [N::zero(), N::zero(), N::zero(), N::zero()]
     }
-    #[inline] fn from_position (pos: impl Size<N>) -> [N;4] {
+    fn from_position (pos: impl Size<N>) -> [N;4] {
         let [x, y] = pos.wh();
         [x, y, 0.into(), 0.into()]
     }
-    #[inline] fn from_size (size: impl Size<N>) -> [N;4] {
+    fn from_size (size: impl Size<N>) -> [N;4] {
         let [w, h] = size.wh();
         [0.into(), 0.into(), w, h]
     }
-    #[inline] fn expect_min (&self, w: N, h: N) -> Usually<&Self> {
+    fn expect_min (&self, w: N, h: N) -> Usually<&Self> {
         if self.w() < w || self.h() < h {
             Err(format!("min {w}x{h}").into())
         } else {
             Ok(self)
         }
     }
-   #[inline] fn xy (&self) -> [N;2] {
+    fn xy (&self) -> [N;2] {
         [self.x(), self.y()]
     }
-    #[inline] fn wh (&self) -> [N;2] {
+    fn wh (&self) -> [N;2] {
         [self.w(), self.h()]
     }
-    #[inline] fn xywh (&self) -> [N;4] {
+    fn xywh (&self) -> [N;4] {
         [self.x(), self.y(), self.w(), self.h()]
     }
-    #[inline] fn clip_h (&self, h: N) -> [N;4] {
+    fn clip_h (&self, h: N) -> [N;4] {
         [self.x(), self.y(), self.w(), self.h().min(h)]
     }
-    #[inline] fn clip_w (&self, w: N) -> [N;4] {
+    fn clip_w (&self, w: N) -> [N;4] {
         [self.x(), self.y(), self.w().min(w), self.h()]
     }
-    #[inline] fn clip (&self, wh: impl Size<N>) -> [N;4] {
+    fn clip (&self, wh: impl Size<N>) -> [N;4] {
         [self.x(), self.y(), wh.w(), wh.h()]
     }
-    #[inline] fn set_w (&self, w: N) -> [N;4] {
+    fn set_w (&self, w: N) -> [N;4] {
         [self.x(), self.y(), w, self.h()]
     }
-    #[inline] fn set_h (&self, h: N) -> [N;4] {
+    fn set_h (&self, h: N) -> [N;4] {
         [self.x(), self.y(), self.w(), h]
     }
-    #[inline] fn x2 (&self) -> N {
+    fn x2 (&self) -> N {
         self.x().plus(self.w())
     }
-    #[inline] fn y2 (&self) -> N {
+    fn y2 (&self) -> N {
         self.y().plus(self.h())
     }
-    #[inline] fn lrtb (&self) -> [N;4] {
+    fn lrtb (&self) -> [N;4] {
         [self.x(), self.x2(), self.y(), self.y2()]
     }
-    #[inline] fn center (&self) -> [N;2] {
+    fn center (&self) -> [N;2] {
         [self.x().plus(self.w()/2.into()), self.y().plus(self.h()/2.into())]
     }
-    #[inline] fn center_x (&self, n: N) -> [N;4] {
+    fn center_x (&self, n: N) -> [N;4] {
         let [x, y, w, h] = self.xywh();
         [(x.plus(w / 2.into())).minus(n / 2.into()), y.plus(h / 2.into()), n, 1.into()]
     }
-    #[inline] fn center_y (&self, n: N) -> [N;4] {
+    fn center_y (&self, n: N) -> [N;4] {
         let [x, y, w, h] = self.xywh();
         [x.plus(w / 2.into()), (y.plus(h / 2.into())).minus(n / 2.into()), 1.into(), n]
     }
-    #[inline] fn center_xy (&self, [n, m]: [N;2]) -> [N;4] {
+    fn center_xy (&self, [n, m]: [N;2]) -> [N;4] {
         let [x, y, w, h] = self.xywh();
         [(x.plus(w / 2.into())).minus(n / 2.into()), (y.plus(h / 2.into())).minus(m / 2.into()), n, m]
     }
-
+    fn centered (&self) -> [N;2] {
-    #[inline] fn centered (&self) -> [N;2] {
         [self.x().minus(self.w()/2.into()), self.y().minus(self.h()/2.into())]
     }
-
     fn iter_x (&self) -> impl Iterator<Item = N> where N: std::iter::Step {
         self.x()..(self.x()+self.w())
     }
@@ -86,17 +84,17 @@ pub trait Area<N: Coordinate>: From<[N;4]> + Debug + Copy {
 }
 
 impl<N: Coordinate> Area<N> for (N, N, N, N) {
-    #[inline] fn x (&self) -> N { self.0 }
+    fn x (&self) -> N { self.0 }
-    #[inline] fn y (&self) -> N { self.1 }
+    fn y (&self) -> N { self.1 }
-    #[inline] fn w (&self) -> N { self.2 }
+    fn w (&self) -> N { self.2 }
-    #[inline] fn h (&self) -> N { self.3 }
+    fn h (&self) -> N { self.3 }
 }
 
 impl<N: Coordinate> Area<N> for [N;4] {
-    #[inline] fn x (&self) -> N { self[0] }
+    fn x (&self) -> N { self[0] }
-    #[inline] fn y (&self) -> N { self[1] }
+    fn y (&self) -> N { self[1] }
-    #[inline] fn w (&self) -> N { self[2] }
+    fn w (&self) -> N { self[2] }
-    #[inline] fn h (&self) -> N { self[3] }
+    fn h (&self) -> N { self[3] }
 }
 
 #[cfg(test)] mod test_area {

output/src/coordinate.rs

@@ -1,12 +1,6 @@
 use std::fmt::{Debug, Display};
 use std::ops::{Add, Sub, Mul, Div};
 
-impl Coordinate for u16 {
-    #[inline] fn plus (self, other: Self) -> Self {
-        self.saturating_add(other)
-    }
-}
-
 /// A linear coordinate.
 pub trait Coordinate: Send + Sync + Copy
     + Add<Self, Output=Self>
@@ -19,13 +13,19 @@ pub trait Coordinate: Send + Sync + Copy
     + Into<usize>
     + Into<f64>
 {
-    #[inline] fn zero () -> Self { 0.into() }
+    fn zero () -> Self { 0.into() }
-    #[inline] fn minus (self, other: Self) -> Self {
+    fn plus (self, other: Self) -> Self;
+    fn minus (self, other: Self) -> Self {
         if self >= other {
             self - other
         } else {
             0.into()
         }
     }
-    fn plus (self, other: Self) -> Self;
+}
+
+impl Coordinate for u16 {
+    fn plus (self, other: Self) -> Self {
+        self.saturating_add(other)
+    }
 }

output/src/op_align.rs

@@ -63,17 +63,17 @@ try_from_expr!(<'a, E>: Align<RenderBox<'a, E>>: |state, iter|{
 });
 
 impl<A> Align<A> {
-    #[inline] pub fn c  (a: A) -> Self { Self(Alignment::Center, a) }
+    #[inline] pub const fn c  (a: A) -> Self { Self(Alignment::Center, a) }
-    #[inline] pub fn x  (a: A) -> Self { Self(Alignment::X,      a) }
+    #[inline] pub const fn x  (a: A) -> Self { Self(Alignment::X,      a) }
-    #[inline] pub fn y  (a: A) -> Self { Self(Alignment::Y,      a) }
+    #[inline] pub const fn y  (a: A) -> Self { Self(Alignment::Y,      a) }
-    #[inline] pub fn n  (a: A) -> Self { Self(Alignment::N,      a) }
+    #[inline] pub const fn n  (a: A) -> Self { Self(Alignment::N,      a) }
-    #[inline] pub fn s  (a: A) -> Self { Self(Alignment::S,      a) }
+    #[inline] pub const fn s  (a: A) -> Self { Self(Alignment::S,      a) }
-    #[inline] pub fn e  (a: A) -> Self { Self(Alignment::E,      a) }
+    #[inline] pub const fn e  (a: A) -> Self { Self(Alignment::E,      a) }
-    #[inline] pub fn w  (a: A) -> Self { Self(Alignment::W,      a) }
+    #[inline] pub const fn w  (a: A) -> Self { Self(Alignment::W,      a) }
-    #[inline] pub fn nw (a: A) -> Self { Self(Alignment::NW,     a) }
+    #[inline] pub const fn nw (a: A) -> Self { Self(Alignment::NW,     a) }
-    #[inline] pub fn sw (a: A) -> Self { Self(Alignment::SW,     a) }
+    #[inline] pub const fn sw (a: A) -> Self { Self(Alignment::SW,     a) }
-    #[inline] pub fn ne (a: A) -> Self { Self(Alignment::NE,     a) }
+    #[inline] pub const fn ne (a: A) -> Self { Self(Alignment::NE,     a) }
-    #[inline] pub fn se (a: A) -> Self { Self(Alignment::SE,     a) }
+    #[inline] pub const fn se (a: A) -> Self { Self(Alignment::SE,     a) }
 }
 impl<E: Output, A: Content<E>> Content<E> for Align<A> {
     fn content (&self) -> impl Render<E> {

output/src/op_bsp.rs

@@ -41,12 +41,12 @@ try_from_expr!(<'a, E>: Bsp<RenderBox<'a, E>, RenderBox<'a, E>>: |state, iter| {
     }
 });
 impl<A, B> Bsp<A, B> {
-    #[inline] pub fn n (a: A, b: B) -> Self { Self(North, a, b) }
+    #[inline] pub const fn n (a: A, b: B) -> Self { Self(North, a, b) }
-    #[inline] pub fn s (a: A, b: B) -> Self { Self(South, a, b) }
+    #[inline] pub const fn s (a: A, b: B) -> Self { Self(South, a, b) }
-    #[inline] pub fn e (a: A, b: B) -> Self { Self(East,  a, b) }
+    #[inline] pub const fn e (a: A, b: B) -> Self { Self(East,  a, b) }
-    #[inline] pub fn w (a: A, b: B) -> Self { Self(West,  a, b) }
+    #[inline] pub const fn w (a: A, b: B) -> Self { Self(West,  a, b) }
-    #[inline] pub fn a (a: A, b: B) -> Self { Self(Above, a, b) }
+    #[inline] pub const fn a (a: A, b: B) -> Self { Self(Above, a, b) }
-    #[inline] pub fn b (a: A, b: B) -> Self { Self(Below, a, b) }
+    #[inline] pub const fn b (a: A, b: B) -> Self { Self(Below, a, b) }
 }
 pub trait BspAreas<E: Output, A: Content<E>, B: Content<E>> {
     fn direction (&self) -> Direction;

output/src/op_cond.rs

@@ -2,11 +2,21 @@ use crate::*;
 
 /// Show an item only when a condition is true.
 pub struct When<A>(pub bool, pub A);
-impl<A> When<A> { #[inline] pub fn new (c: bool, a: A) -> Self { Self(c, a) } }
+impl<A> When<A> {
+    /// Create a binary condition.
+    pub const fn new (c: bool, a: A) -> Self {
+        Self(c, a)
+    }
+}
 
 /// Show one item if a condition is true and another if the condition is false
 pub struct Either<A, B>(pub bool, pub A, pub B);
-impl<A, B> Either<A, B> { #[inline] pub fn new (c: bool, a: A, b: B) -> Self { Self(c, a, b) } }
+impl<A, B> Either<A, B> {
+    /// Create a ternary condition.
+    pub const fn new (c: bool, a: A, b: B) -> Self {
+        Self(c, a, b) 
+    }
+}
 
 #[cfg(feature = "dsl")]
 try_from_expr!(<'a, E>: When<RenderBox<'a, E>>: |state, iter| {

output/src/op_iter.rs

@@ -40,9 +40,9 @@ impl<'a, E, A, B, I, F, G> Map<E, A, B, I, F, G> where
     I: Iterator<Item = A> + Send + Sync + 'a,
     F: Fn() -> I + Send + Sync + 'a,
 {
-    pub fn new (get_iterator: F, get_item: G) -> Self {
+    pub const fn new (get_iterator: F, get_item: G) -> Self {
         Self {
-            __: Default::default(),
+            __: PhantomData,
             get_iterator,
             get_item
         }

output/src/op_reduce.rs

@@ -12,7 +12,7 @@ impl<A, B, I, F, G> Reduce<A, B, I, F, G> where
     F: Fn() -> I + Send + Sync,
     G: Fn(A, B, usize)->A + Send + Sync
 {
-    pub fn new (f: F, g: G) -> Self { Self(Default::default(), f, g) }
+    pub const fn new (f: F, g: G) -> Self { Self(Default::default(), f, g) }
 }
 
 impl<E: Output, A, B, I, F, G> Content<E> for Reduce<A, B, I, F, G> where

output/src/op_transform.rs

@@ -26,9 +26,9 @@ macro_rules! transform_xy {
     ($x:literal $y:literal $xy:literal |$self:ident : $Enum:ident, $to:ident|$area:expr) => {
         pub enum $Enum<T> { X(T), Y(T), XY(T) }
         impl<T> $Enum<T> {
-            #[inline] pub fn x (item: T) -> Self { Self::X(item) }
+            #[inline] pub const fn x (item: T) -> Self { Self::X(item) }
-            #[inline] pub fn y (item: T) -> Self { Self::Y(item) }
+            #[inline] pub const fn y (item: T) -> Self { Self::Y(item) }
-            #[inline] pub fn xy (item: T) -> Self { Self::XY(item) }
+            #[inline] pub const fn xy (item: T) -> Self { Self::XY(item) }
         }
         #[cfg(feature = "dsl")]
         impl<'a, E: Output + 'a, T: ViewContext<'a, E>> TryFromAtom<'a, T>
@@ -78,9 +78,9 @@ macro_rules! transform_xy_unit {
     ($x:literal $y:literal $xy:literal |$self:ident : $Enum:ident, $to:ident|$layout:expr) => {
         pub enum $Enum<U, T> { X(U, T), Y(U, T), XY(U, U, T), }
         impl<U, T> $Enum<U, T> {
-            #[inline] pub fn x (x: U, item: T) -> Self { Self::X(x, item) }
+            #[inline] pub const fn x (x: U, item: T) -> Self { Self::X(x, item) }
-            #[inline] pub fn y (y: U, item: T) -> Self { Self::Y(y, item) }
+            #[inline] pub const fn y (y: U, item: T) -> Self { Self::Y(y, item) }
-            #[inline] pub fn xy (x: U, y: U, item: T) -> Self { Self::XY(x, y, item) }
+            #[inline] pub const fn xy (x: U, y: U, item: T) -> Self { Self::XY(x, y, item) }
         }
         #[cfg(feature = "dsl")]
         impl<'a, E: Output + 'a, T: ViewContext<'a, E>> TryFromAtom<'a, T>

output/src/size.rs

@@ -4,39 +4,39 @@ use std::fmt::Debug;
 pub trait Size<N: Coordinate>: From<[N;2]> + Debug + Copy {
     fn x (&self) -> N;
     fn y (&self) -> N;
-    #[inline] fn w (&self) -> N { self.x() }
+    fn w (&self) -> N { self.x() }
-    #[inline] fn h (&self) -> N { self.y() }
+    fn h (&self) -> N { self.y() }
-    #[inline] fn wh (&self) -> [N;2] { [self.x(), self.y()] }
+    fn wh (&self) -> [N;2] { [self.x(), self.y()] }
-    #[inline] fn clip_w (&self, w: N) -> [N;2] { [self.w().min(w), self.h()] }
+    fn clip_w (&self, w: N) -> [N;2] { [self.w().min(w), self.h()] }
-    #[inline] fn clip_h (&self, h: N) -> [N;2] { [self.w(), self.h().min(h)] }
+    fn clip_h (&self, h: N) -> [N;2] { [self.w(), self.h().min(h)] }
-    #[inline] fn expect_min (&self, w: N, h: N) -> Usually<&Self> {
+    fn expect_min (&self, w: N, h: N) -> Usually<&Self> {
         if self.w() < w || self.h() < h {
             Err(format!("min {w}x{h}").into())
         } else {
             Ok(self)
         }
     }
-    #[inline] fn zero () -> [N;2] {
+    fn zero () -> [N;2] {
         [N::zero(), N::zero()]
     }
-    #[inline] fn to_area_pos (&self) -> [N;4] {
+    fn to_area_pos (&self) -> [N;4] {
         let [x, y] = self.wh();
         [x, y, 0.into(), 0.into()]
     }
-    #[inline] fn to_area_size (&self) -> [N;4] {
+    fn to_area_size (&self) -> [N;4] {
         let [w, h] = self.wh();
         [0.into(), 0.into(), w, h]
     }
 }
 
 impl<N: Coordinate> Size<N> for (N, N) {
-    #[inline] fn x (&self) -> N { self.0 }
+    fn x (&self) -> N { self.0 }
-    #[inline] fn y (&self) -> N { self.1 }
+    fn y (&self) -> N { self.1 }
 }
 
 impl<N: Coordinate> Size<N> for [N;2] {
-    #[inline] fn x (&self) -> N { self[0] }
+    fn x (&self) -> N { self[0] }
-    #[inline] fn y (&self) -> N { self[1] }
+    fn y (&self) -> N { self[1] }
 }
 
 #[cfg(test)] mod test_size {

output/src/thunk.rs

@@ -2,28 +2,39 @@ use crate::*;
 use std::marker::PhantomData;
 
 /// Lazily-evaluated [Render]able.
-pub struct Thunk<E: Output, T: Render<E>, F: Fn()->T + Send + Sync>(PhantomData<E>, F);
+pub struct Thunk<E: Output, T: Render<E>, F: Fn()->T + Send + Sync>(
+    PhantomData<E>,
+    F
+);
 impl<E: Output, T: Render<E>, F: Fn()->T + Send + Sync> Thunk<E, T, F> {
-    pub fn new (thunk: F) -> Self {
+    pub const fn new (thunk: F) -> Self {
-        Self(Default::default(), thunk)
+        Self(PhantomData, thunk)
     }
 }
 impl<E: Output, T: Render<E>, F: Fn()->T + Send + Sync> Content<E> for Thunk<E, T, F> {
     fn content (&self) -> impl Render<E> { (self.1)() }
 }
 
-pub struct ThunkBox<'a, E: Output>(PhantomData<E>, Box<dyn Fn()->RenderBox<'a, E> + Send + Sync + 'a>);
+pub struct ThunkBox<'a, E: Output>(
+    PhantomData<E>,
+    Box<dyn Fn()->RenderBox<'a, E> + Send + Sync + 'a>
+);
 impl<'a, E: Output> ThunkBox<'a, E> {
-    pub fn new (thunk: Box<dyn Fn()->RenderBox<'a, E> + Send + Sync + 'a>) -> Self {
+    pub const fn new (thunk: Box<dyn Fn()->RenderBox<'a, E> + Send + Sync + 'a>) -> Self {
-        Self(Default::default(), thunk)
+        Self(PhantomData, thunk)
     }
 }
 impl<'a, E: Output> Content<E> for ThunkBox<'a, E> {
     fn content (&self) -> impl Render<E> { (self.1)() }
 }
-impl<'a, E: Output, F: Fn()->T + Send + Sync + 'a, T: Render<E> + Send + Sync + 'a> From<F> for ThunkBox<'a, E> {
+impl<'a, E, F, T> From<F> for ThunkBox<'a, E>
+where
+    E: Output,
+    F: Fn()->T + Send + Sync + 'a,
+    T: Render<E> + Send + Sync + 'a
+{
     fn from (f: F) -> Self {
-        Self(Default::default(), Box::new(move||f().boxed()))
+        Self(PhantomData, Box::new(move||f().boxed()))
     }
 }
 //impl<'a, E: Output, F: Fn()->Box<dyn Render<E> + 'a> + Send + Sync + 'a> From<F> for ThunkBox<'a, E> {
@@ -34,17 +45,30 @@ impl<'a, E: Output, F: Fn()->T + Send + Sync + 'a, T: Render<E> + Send + Sync +
 
 pub struct ThunkRender<E: Output, F: Fn(&mut E) + Send + Sync>(PhantomData<E>, F);
 impl<E: Output, F: Fn(&mut E) + Send + Sync> ThunkRender<E, F> {
-    pub fn new (render: F) -> Self { Self(Default::default(), render) }
+    pub fn new (render: F) -> Self { Self(PhantomData, render) }
 }
 impl<E: Output, F: Fn(&mut E) + Send + Sync> Content<E> for ThunkRender<E, F> {
     fn render (&self, to: &mut E) { (self.1)(to) }
 }
 
-pub struct ThunkLayout<E: Output, F1: Fn(E::Area)->E::Area + Send + Sync, F2: Fn(&mut E) + Send + Sync>(PhantomData<E>, F1, F2);
+pub struct ThunkLayout<
+    E: Output,
+    F1: Fn(E::Area)->E::Area + Send + Sync, 
+    F2: Fn(&mut E) + Send + Sync
+>(
+    PhantomData<E>, 
+    F1,
+    F2
+);
 impl<E: Output, F1: Fn(E::Area)->E::Area + Send + Sync, F2: Fn(&mut E) + Send + Sync> ThunkLayout<E, F1, F2> {
-    pub fn new (layout: F1, render: F2) -> Self { Self(Default::default(), layout, render) }
+    pub fn new (layout: F1, render: F2) -> Self { Self(PhantomData, layout, render) }
 }
-impl<E: Output, F1: Fn(E::Area)->E::Area + Send + Sync, F2: Fn(&mut E) + Send + Sync> Content<E> for ThunkLayout<E, F1, F2> {
+impl<E, F1, F2> Content<E> for ThunkLayout<E, F1, F2>
+where
+    E:  Output,
+    F1: Fn(E::Area)->E::Area + Send + Sync,
+    F2: Fn(&mut E) + Send + Sync
+{
     fn layout (&self, to: E::Area) -> E::Area { (self.1)(to) }
     fn render (&self, to: &mut E) { (self.2)(to) }
 }