More tweaks and some deletions

tuchang · May 17, 2014 · 0fb57c3 · 0fb57c3
1 parent db5033e
commit 0fb57c3
Showing 1 changed file with 6 additions and 14 deletions.
diff --git a/go-beyond.tex b/go-beyond.tex
@@ -307,22 +307,21 @@ \subsection{Methods}
 declarations. Also see \cite[section~``Type Declarations'']{go_spec}.
 Suppose we have:
 \begin{lstlisting}
-// A Mutex is a data type with two methods,
-// Lock and Unlock.
+// A Mutex is a data type with two methods, Lock and Unlock.
 type Mutex struct         { /* Mutex fields */ }
 func (m *Mutex) Lock()    { /* Lock impl. */ }
 func (m *Mutex) Unlock()  { /* Unlock impl. */ }
 \end{lstlisting}
 We now create two types in two different manners:
 \begin{itemize}
-\item \lstinline|type NewMutex Mutex|;
-\item \lstinline|type PrintableMutex struct {  Mutex }|.
+    \item{\lstinline|type NewMutex Mutex|};
+    \item{\lstinline|type PrintableMutex struct{Mutex}|}.
 \end{itemize}
-Now \var{NewMutex} is equal to \var{Mutex}, but
+\var{NewMutex} is equal to \var{Mutex}, but
 it \emph{does not} have \emph{any} of the methods of \var{Mutex}. In other words
 its method set is empty.
 But \var{PrintableMutex} \emph{has} \first{\emph{inherited}}{methods!inherited} the 
-method set from \var{Mutex}.
+method set from \var{Mutex}. The Go term for this is \first{\emph{embedding}}{structures!embed}.
 In the words of \cite{go_spec}:
 \begin{quote}
 The method set of \var{*PrintableMutex} contains the methods
@@ -369,8 +368,7 @@ \section{Conversions}
 \item{
 From a slice of bytes or runes to a \lstinline{string}.
 \begin{lstlisting}
-b := []byte{'h','e','l','l','o'} // Composite 
-                                 // literal
+b := []byte{'h','e','l','l','o'} |\coderemark{Composite literal}|
 s := string(b)
 i := []rune{257,1024,65} 
 r := string(i)
@@ -415,12 +413,6 @@ \subsection{User defined types and conversions}
 \type{int} also fails; an integer is not the same as a structure containing
 an integer.
 
-\section{Composition}
-TODO(miek):work in progress
-Go isn't an object oriented language and as such does not have inheritance, but sometimes you
-do want to "inherit" some methods that are implemented for a type and change a few. In Go is
-this possible by embedding a type.
-
 \section{Exercises}
 \input{ex-beyond/ex-pointer-arith.tex}