feat: support intrusive_adapter! access nested field #57


	name: CI
	on: [push, pull_request]
	jobs:
	test:
	name: Test
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	rust: [1.56.1, stable, beta, nightly]
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	- name: Install rust
	uses: actions-rs/toolchain@v1
	with:
	toolchain: ${{ matrix.rust }}
	profile: minimal
	override: true
	- uses: actions-rs/cargo@v1
	with:
	command: test
	- if: matrix.rust == 'nightly'
	uses: actions-rs/cargo@v1
	with:
	command: test
	args: --features nightly
	fmt:
	name: Rustfmt
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: actions-rs/toolchain@v1
	with:
	profile: minimal
	toolchain: stable
	override: true
	- run: rustup component add rustfmt
	- uses: actions-rs/cargo@v1
	with:
	command: fmt
	args: -- --check
	miri:
	name: Miri
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: actions-rs/toolchain@v1
	with:
	profile: minimal
	toolchain: nightly
	override: true
	- run: rustup component add miri
	- run: cargo miri test --verbose --all-features

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