JoostK 66e9970691 feat(ngcc): support __read helper as used by TypeScript 4.2 (#41201)
This commit complements the support for the `__spreadArray` helper that
was added in microsoft/TypeScript#41523. The prior helpers `__spread`
and `__spreadArrays` used the `__read` helper internally, but the helper
is now emitted as an argument to `__spreadArray` so ngcc now needs to
support evaluating it statically. The real implementation of `__read`
reads an iterable into an array, but for ngcc's static evaluation
support it is sufficient to only deal with arrays as is. Additionally,
the optional `n` parameter is not supported as that is only emitted for
array destructuring syntax, which ngcc does not have to support.

PR Close #41201
2021-03-16 11:06:31 -07:00
2020-11-18 11:11:41 -08:00
2020-01-27 09:31:22 -08:00

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