Dylan Hunn 29bf476bfe refactor(compiler): Generate temporary variable assignments when function calls appear in a safe-access expression. (#50688) ...

The expression `a()?.b` should expand into `(tmp = a()) === null ? null : tmp.b`, in order to avoid calling the function `a()` twice.

This commit modifies the null-safe-expansion algorithm to emit temporary assignments, and provides the reification code to actually generate the declarations, assignments, and reads.

Note also that, with our bottom-up algorithm, there are some tricky cases when a function call exists inside an indexed access, such as `f1()?.[f2()?.a]?.b`. We add some special logic to avoid generating a double-assignment to the temporary storing the result of `f2()`.

Finally, there are opportunities to reuse the same temporary in expressions like `a?.[f()]?.[f()]`. We save this for the next commit.

PR Close #50688

2023-06-29 12:54:23 -07:00

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compliance

refactor(compiler): Generate temporary variable assignments when function calls appear in a safe-access expression. (#50688)

2023-06-29 12:54:23 -07:00

ngtsc

refactor(compiler-cli): add internal compiler option to control class metadata emit (#50604)

2023-06-20 13:01:48 -07:00

BUILD.bazel

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downlevel_decorators_transform_spec.ts

build: update to TypeScript 5.1 final (#50548)

2023-06-02 14:06:46 -07:00

extract_i18n_spec.ts

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mocks.ts

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perform_compile_spec.ts

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perform_watch_spec.ts

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test_support.ts

refactor(router): run spell check on router package (#50445)

2023-05-24 13:56:56 +00:00

typescript_support_spec.ts

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version_helpers_spec.ts

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