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~~ structured binding 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~~ a structured binding (8.5 [dcl.decomp]), decltype(e) is the referenced type as given in the specification of the ~~decomposition~~ structured binding 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~~ structured binding declaration (8.5 [dcl.decomp]).

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

8.5 ~~Decomposition~~ Structured binding declarations ~~[dcl.decomp]~~ [dcl.struct.bind]
A ~~decomposition~~ structured binding declaration introduces the identifiers v0, v1, v2 , ... of the identifier-list as names (3.3.1), called structured bindings. ... ... 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~~ structured binding 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~~ structured binding 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~~Structured bindings introduced in one ~~decomposition~~ declaration [256].

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