9 Statements [stmt.stmt]

9.1 Labeled statement [stmt.label]

A statement can be labeled.

labeled-statement:
	attribute-specifier-seq identifier : statement
	attribute-specifier-seq case constant-expression : statement
	attribute-specifier-seq default : statement

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: A label may have the same name as another declaration in the same scope or a template-parameter from an enclosing scope. Unqualified name lookup ignores labels. end note]

Case labels and default labels shall occur only in switch statements.