How deeply does Modern C, Third Edition cover regex grouping?

Defines init-capture syntax and its inferred, const-qualified semantics, but leaves writable captures beyond scope.

Regex grouping

A capture is a lambda specification identifying variables from the surrounding scope that are made available inside the lambda.

A lambda’s capture list, written in `[ ... ]`, is the only part that can read the surrounding context. An init-capture uses `identifier = initializer`; its semantics resemble `auto` type inference with `const` qualification. Captures that allow writing are mentioned but not developed. section 18.4

Captures in SWAP

A `SWAP` macro uses captures such as `swap_p1 = &(X)` and `swap_p2 = &(Y)` to make the operands available inside the lambda, much like function parameters. section 18.4

How Modern C, Third Edition covers it

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Related concepts

noncapturing groupcontrasts with · A noncapturing group is a parenthesized regular-expression subpattern that groups matching behavior without storing its matched text as a capture.
regular expressionpart of · A formal pattern notation that describes sets of strings and enables text to be matched, searched, extracted, or transformed.
backreferenceused by · A backreference is regular-expression or replacement-string notation that refers to text captured by a capturing group.
splitconfigures · Split is an operation or function that divides a string or sequence into parts according to a separator, pattern, or other rule.

This explainer was generated by Manning's knowledge graph from the text of Modern C, Third Edition. The section links point to the parts of the book it draws on.