P0615R0: Renaming for structured bindings

As per EWG guidance on Monday, this paper replaces the term "decomposition declaration" with "structured binding declaration" and adds the term "structured binding" for each name so introduced.

Change in 7 [dcl.dcl] paragraph 8:

A simple-declaration with an identifier-list is called a ~~decomposition~~ declaration (8.5 [dcl.decomp]).

Change in 7.1.7.2 [dcl.type.simple] paragraph 4:

For an expression e, the type denoted by decltype(e) is defined as follows:

if e is an unparenthesized id-expression naming ~~an lvalue or reference introduced from the identifier-list of a decomposition declaration~~ , decltype(e) is the referenced type as given in the specification of the ~~decomposition~~ declaration ~~(8.5 [dcl.decomp])~~;

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Change in 7.1.7.4 [dcl.spec.auto] paragraph 1:

The auto type-specifier is also used to introduce a ~~decomposition~~ declaration (8.5 [dcl.decomp]).

Change the section heading and paragraph 1 of 8.5 [dcl.decomp]:

8.5 ~~Decomposition~~ declarations ~~[dcl.decomp]~~
A ~~decomposition~~ declaration introduces the identifiers v0, v1, v2 , ... of the identifier-list as names (3.3.1). ... ... where the declaration is never interpreted as a function declaration and the parts of the declaration other than the declarator-id are taken from the corresponding ~~decomposition~~ declaration. ...

Change in 14.6.2.2 [temp.dep.expr] paragraph 3:

An id-expression is type-dependent if it contains

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an identifier associated by name lookup with a ~~decomposition~~ declaration (8.5) whose brace-or-equal-initializer is type-dependent,

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Change in Annex B [implimits]:

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~~Identifiers~~ introduced in one ~~decomposition~~ declaration [256].

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