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More statement-to-expression edits #309

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Apr 5, 2011
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More statement-to-expression edits #309

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20 changes: 10 additions & 10 deletions doc/rust.texi
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Original file line number Diff line number Diff line change
Expand Up @@ -1804,8 +1804,8 @@ otherwise exactly as a function item (with a minor additional cost of calling
the function, as such a call is indirect). @xref{Ref.Type.Fn}.

Every control path in a function ends with either a @code{ret} or @code{be}
statement. If a control path lacks a @code{ret} statement in source code, an
implicit @code{ret} statement is appended to the end of the control path
expression. If a control path lacks a @code{ret} expression in source code, an
implicit @code{ret} expression is appended to the end of the control path
during compilation, returning the implicit @code{()} value.

A function may have an @emph{effect}, which may be either @code{impure} or
Expand All @@ -1827,9 +1827,9 @@ fn add(int x, int y) -> int @{
@c * Ref.Item.Iter:: Items defining iterators.

@cindex Iterators
@cindex Put statement
@cindex Put each statement
@cindex Foreach statement
@cindex Put expression
@cindex Put each expression
@cindex Foreach expression

Iterators are function-like items that can @code{put} multiple values during
their execution before returning or tail-calling.
Expand All @@ -1841,11 +1841,11 @@ but the iterator frame is only @emph{suspended} during the put, and will be
the caller's loop.

The output type of an iterator is the type of value that the function will
@code{put}, before it eventually executes a @code{ret} or @code{be} statement
@code{put}, before it eventually evaluates a @code{ret} or @code{be} expression
of type @code{()} and completes its execution.

An iterator can only be called in the loop header of a matching @code{for
each} loop or as the argument in a @code{put each} statement.
each} loop or as the argument in a @code{put each} expression.
@xref{Ref.Stmt.Foreach}.

An example of an iterator:
Expand Down Expand Up @@ -2052,13 +2052,13 @@ Rust; they cannot be used as user-defined identifiers in any context.
@cindex Any type
@cindex Dynamic type, see @i{Any type}
@cindex Reflection
@cindex Alt type statement
@cindex Alt type expression

The type @code{any} is the union of all possible Rust types. A value of type
@code{any} is represented in memory as a pair consisting of a boxed value of
some non-@code{any} type @var{T} and a reflection of the type @var{T}.

Values of type @code{any} can be used in an @code{alt type} statement, in
Values of type @code{any} can be used in an @code{alt type} expression, in
which the reflection is used to select a block corresponding to a particular
type extraction. @xref{Ref.Stmt.Alt}.

Expand Down Expand Up @@ -2549,7 +2549,7 @@ right hand side of copy statements, @xref{Ref.Stmt.Copy}.
@c * Ref.Stmt:: Executable statements.
@cindex Statements

A @dfn{statement} is a component of a block, which is in turn a components of
A @dfn{statement} is a component of a block, which is in turn a component of
an outer block, a function or an iterator. When a function is spawned into a
task, the task @emph{executes} statements in an order determined by the body
of the enclosing structure. Each statement causes the task to perform certain
Expand Down