8 Statements [stmt.stmt]

8.2 Labeled statement [stmt.label]

1
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A statement can be labeled.
The optional attribute-specifier-seq appertains to the label.
An identifier label declares the identifier.
The only use of an identifier label is as the target of a goto.
The scope of a label is the function in which it appears.
Labels shall not be redeclared within a function.
A label can be used in a goto statement before its declaration.
Labels have their own name space and do not interfere with other identifiers.
[Note 1:
A label can have the same name as another declaration in the same scope or a template-parameter from an enclosing scope.
Unqualified name lookup ([basic.lookup.unqual]) ignores labels.
— end note]
2
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Case labels and default labels shall occur only in switch statements.