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SI-7523, SI-7605 Remove procedures from spec #117

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SI-7523, SI-7605 Remove procedures from spec #117

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38 changes: 0 additions & 38 deletions documentation/src/reference/ReferencePart.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -2507,44 +2507,6 @@ \subsection{Repeated Parameters}\label{sec:repeated-params}
sum(xs: _*)
\end{lstlisting}

\subsection{Procedures}\label{sec:procedures}

\syntax\begin{lstlisting}
FunDcl ::= FunSig
FunDef ::= FunSig [nl] `{' Block `}'
\end{lstlisting}

Special syntax exists for procedures, i.e.\ functions that return the
\verb@Unit@ value \verb@()@.
A procedure declaration is a function declaration where the result type
is omitted. The result type is then implicitly completed to the
\verb@Unit@ type. E.g., ~\lstinline@def $f$($\ps$)@~ is equivalent to
~\lstinline@def $f$($\ps$): Unit@.

A procedure definition is a function definition where the result type
and the equals sign are omitted; its defining expression must be a block.
E.g., ~\lstinline@def $f$($\ps$) {$\stats$}@~ is equivalent to
~\lstinline@def $f$($\ps$): Unit = {$\stats$}@.

\example Here is a declaration and a definition of a procedure named \lstinline@write@:
\begin{lstlisting}
trait Writer {
def write(str: String)
}
object Terminal extends Writer {
def write(str: String) { System.out.println(str) }
}
\end{lstlisting}
The code above is implicitly completed to the following code:
\begin{lstlisting}
trait Writer {
def write(str: String): Unit
}
object Terminal extends Writer {
def write(str: String): Unit = { System.out.println(str) }
}
\end{lstlisting}

\subsection{Method Return Type Inference}\label{sec:meth-type-inf}

\comment{
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3 changes: 1 addition & 2 deletions documentation/src/reference/SyntaxSummary.tex
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Expand Up @@ -241,7 +241,7 @@ \chapter{Scala Syntax Summary}\label{sec:syntax}

ValDcl ::= ids `:' Type
VarDcl ::= ids `:' Type
FunDcl ::= FunSig [`:' Type]
FunDcl ::= FunSig `:' Type
FunSig ::= id [FunTypeParamClause] ParamClauses
TypeDcl ::= id [TypeParamClause] [`>:' Type] [`<:' Type]

Expand All @@ -255,7 +255,6 @@ \chapter{Scala Syntax Summary}\label{sec:syntax}
VarDef ::= PatDef
| ids `:' Type `=' `_'
FunDef ::= FunSig [`:' Type] `=' Expr
| FunSig [nl] `{' Block `}'
| `this' ParamClause ParamClauses
(`=' ConstrExpr | [nl] ConstrBlock)
TypeDef ::= id [TypeParamClause] `=' Type
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