US150 15.10 [cpp.predefined] Add feature-test macro for "familiar template syntax for generic lambdas" P1902

[wg21bot]

Familiar template syntax for generic lambdas should have a feature test macro: it is a significant enough feature

Proposed change:
Add __cpp_lambda_template_parameters

[brevzin]

SG10 consensus on the the new macro, instead bumping __cpp_generic_lambdas, in D1902R1.

[jensmaurer]

Assigning to EWG for a nod.

[jfbastien]

EWG on Thursday: Forward D1902 to CWG as a resolution to US150, GB147 and GB146, and let SG10 decide names for the macros

SF	F	N	A	SA
16	7	1	0	0

[jensmaurer]

CWG in Belfast: Accepted with modification. See paper P1902R1.