cplusplus / cplusplus/draft

What are the immediate subexpressions of a braced-init-list

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Description

Consider this rule:

An expression or conversion is potentially constant evaluated if it is:

  • [...]
  • an immediate subexpression of a braced-init-list

In the current standard, all formal definitions for immediate subexpressions are based on an expression, that is
basic.exec#intro.execution-3

The immediate subexpressions of an expression E are

  • [...]

Informally, a braced-init-list is not an expression. How to determine what are the immediate subexpressions of a braced-init-list? There's no other rule specified for this conception. Does it refer to the immediate subexpressions of the constitute expressions of a braced-init-list?

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Research direction

Start with basic.exec#intro.execution-3 and the cited rule for expressions or conversions that are potentially constant evaluated. Determine whether the standard defines immediate subexpressions for a braced-init-list or its constituent expressions; done means resolving the ambiguity in the draft wording.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
compilers, documentation
Issue type
Documentation
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
25/100

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