Add convenience methods to Storable object

The methods call the corresponding type class method for the type parameter

Author: greedy

src/llvm-ffi/scala/ffi/Ptr.scala

@@ -30,7 +30,7 @@ class Ptr[T] private[ffi] (private[ffi] val address: CIntPtr) {
   def poke(x: T)(implicit st: Storable[T]): Unit = st.poke(this, x)
   def peekElemOff(n: Int)(implicit st: Storable[T]): T = st.peekElemOff(this, n)
   def pokeElemOff(n: Int, x: T)(implicit st: Storable[T]): Unit = st.pokeElemOff(this, n, x)
-  def peekByteOff[S:Storable](n: Int) = implicitly[Storable[S]].peekByteOff(this, n)
-  def pokeByteOff[S:Storable](n: Int, x: S) = implicitly[Storable[S]].pokeByteOff(this, n, x)
+  def peekByteOff[S:Storable](n: Int): S = Storable.peekByteOff(this, n)
+  def pokeByteOff[S:Storable](n: Int, x: S): Unit = Storable.pokeByteOff(this, n, x)
   def isNull = address == 0
 }

src/llvm-ffi/scala/ffi/Storable.scala

@@ -3,6 +3,14 @@ package scala.ffi
 object Storable extends ctypes.StorableCtypes
 {
   def get[T:Storable] = implicitly[Storable[T]]
+  def size[T:Storable] = get[T].size
+  def alignment[T:Storable] = get[T].alignment
+  def peekElemOff[T:Storable](base: Ptr[T], n: Int): T = get[T].peekElemOff(base, n)
+  def pokeElemOff[T:Storable](base: Ptr[T], n: Int, x: T): Unit = get[T].pokeElemOff(base, n, x)
+  def peekByteOff[T:Storable](base: Ptr[_], n: Int): T = get[T].peekByteOff(base, n)
+  def pokeByteOff[T:Storable](base: Ptr[_], n: Int, x: T): Unit = get[T].pokeByteOff(base, n, x)
+  def peek[T:Storable](ptr: Ptr[T]): T = get[T].peek(ptr)
+  def poke[T:Storable](ptr: Ptr[T], x: T): Unit = get[T].poke(ptr, x)
 }
 
 trait Storable[T] {