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go spec: method names must be unique

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Fixes #2916.

R=golang-dev, remyoudompheng, r, rsc
CC=golang-dev
https://golang.org/cl/5652064
This commit is contained in:
Robert Griesemer 2012-02-12 20:03:30 -08:00
parent 6fa2296e83
commit b1d9ae9406
1 changed files with 20 additions and 11 deletions
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31
doc/go_spec.html
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@ -662,7 +662,7 @@ The method set of the corresponding pointer type <code>*T</code>
is the set of all methods with receiver <code>*T</code> or <code>T</code> is the set of all methods with receiver <code>*T</code> or <code>T</code>
(that is, it also contains the method set of <code>T</code>). (that is, it also contains the method set of <code>T</code>).
Any other type has an empty method set. Any other type has an empty method set.
In a method set, each method must have a unique name. In a method set, each method must have a unique <a href="#MethodName">method name</a>.
</p> </p>
<p> <p>
@ -1862,11 +1862,13 @@ they can be used to declare local temporary variables (§<a href="#Statements">S
<h3 id="Function_declarations">Function declarations</h3> <h3 id="Function_declarations">Function declarations</h3>
<p> <p>
A function declaration binds an identifier to a function (§<a href="#Function_types">Function types</a>). A function declaration binds an identifier, the <i>function name</i>,
to a function.
</p> </p>
<pre class="ebnf"> <pre class="ebnf">
FunctionDecl = "func" identifier Signature [ Body ] . FunctionDecl = "func" FunctionName Signature [ Body ] .
FunctionName = identifier .
Body = Block . Body = Block .
</pre> </pre>
@ -1890,8 +1892,10 @@ func flushICache(begin, end uintptr) // implemented externally
<p> <p>
A method is a function with a <i>receiver</i>. A method is a function with a <i>receiver</i>.
A method declaration binds an identifier to a method. A method declaration binds an identifier, the <i>method name</i>, to a method.
It also associates the method with the receiver's <i>base type</i>.
</p> </p>
<pre class="ebnf"> <pre class="ebnf">
MethodDecl = "func" Receiver MethodName Signature [ Body ] . MethodDecl = "func" Receiver MethodName Signature [ Body ] .
Receiver = "(" [ identifier ] [ "*" ] BaseTypeName ")" . Receiver = "(" [ identifier ] [ "*" ] BaseTypeName ")" .
@ -1900,13 +1904,18 @@ BaseTypeName = identifier .
<p> <p>
The receiver type must be of the form <code>T</code> or <code>*T</code> where The receiver type must be of the form <code>T</code> or <code>*T</code> where
<code>T</code> is a type name. <code>T</code> is called the <code>T</code> is a type name. The type denoted by <code>T</code> is called
<i>receiver base type</i> or just <i>base type</i>. the receiver <i>base type</i>; it must not be a pointer or interface type and
The base type must not be a pointer or interface type and must be it must be declared in the same package as the method.
declared in the same package as the method. The method is said to be <i>bound</i> to the base type and the method name
The method is said to be <i>bound</i> to the base type is visible only within selectors for that type.
and is visible only within selectors for that type </p>
(§<a href="#Type_declarations">Type declarations</a>, §<a href="#Selectors">Selectors</a>).
<p>
For a base type, the non-<a href="#Blank_identifier">blank</a> names of
methods bound to it must be unique.
If the base type is a <a href="#Struct_types">struct type</a>,
the non-blank method and field names must be distinct.
</p> </p>
<p> <p>