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pythonesque opened this issue Nov 19, 2014 · 3 comments · Fixed by #9102
Closed

Returning Box<T> #5

pythonesque opened this issue Nov 19, 2014 · 3 comments · Fixed by #9102
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@botahamec
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A-lint Area: New lints E-medium Call for participation: Medium difficulty level problem and requires some initial experience. T-middle Type: Probably requires verifiying types

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@pythonesque
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pythonesque commented Nov 19, 2014 •
edited by rustbot
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We explicitly say in the pointer guide that you usually shouldn't do this, return T instead and box it.
@pythonesque
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This doesn't (yet) apply to other smart pointer types like Rc and Arc, but will when placement box works.

@Manishearth Manishearth added E-medium Call for participation: Medium difficulty level problem and requires some initial experience. T-middle Type: Probably requires verifiying types A-lint Area: New lints labels Aug 11, 2015
@Stebalien
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When T is Sized.

@clarfonthey clarfonthey mentioned this issue Jun 27, 2018
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@ebroto ebroto mentioned this issue Dec 15, 2020
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camsteffen added a commit to camsteffen/rust-clippy that referenced this issue Jan 15, 2021
@camsteffen
# This is a combination of 6 commits.
aaf6bcf 
# This is the 1st commit message:

Split filter_map into manual_filter_map

# The commit message rust-lang#2 will be skipped:

# fixup! Split filter_map into manual_filter_map

# The commit message rust-lang#3 will be skipped:

# fixup! Split filter_map into manual_filter_map

# The commit message rust-lang#4 will be skipped:

# fixup! Split filter_map into manual_filter_map

# The commit message rust-lang#5 will be skipped:

# fixup! Split filter_map into manual_filter_map

# The commit message rust-lang#6 will be skipped:

# fixup! Split filter_map into manual_filter_map
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@rustbot claim

@botahamec botahamec mentioned this issue Jul 2, 2022
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@rick-kilgore rick-kilgore mentioned this issue Oct 30, 2022
Closed
@bors bors closed this as completed in ef3867f Mar 30, 2023
surechen added a commit to surechen/rust-clippy that referenced this issue Jun 26, 2023
@surechen
Squashed commit of the following:
4f6422c 
commit 3a413b7
Merge: d5a1eff 4d8af6f
Author: surechen <chenshuo17@huawei.com>
Date:   Mon Jun 26 11:32:14 2023 +0800

    Merge pull request rust-lang#5 from mojave2/lint_loop_exit

    new_lint loop_without_break_or_return

commit 4d8af6f
Author: mojave2 <0109chenchen@gmail.com>
Date:   Sun Jun 25 19:21:11 2023 +0800

    new_line loop_without_break_or_return

    Signed-off-by: mojave2 <0109chenchen@gmail.com>

commit d5a1eff
Merge: af6c9d4 9cd4b13
Author: surechen <chenshuo17@huawei.com>
Date:   Mon Jun 26 11:23:44 2023 +0800

    Merge pull request rust-lang#2 from mojave2/dev_stable

    new_lint non_reentrant_functions

commit 9cd4b13
Author: mojave2 <0109chenchen@gmail.com>
Date:   Wed Jun 21 17:44:12 2023 +0800

    update_lint non_reentrant_functions

    Signed-off-by: mojave2 <0109chenchen@gmail.com>

commit c900d4a
Author: mojave2 <0109chenchen@gmail.com>
Date:   Mon Jun 19 18:37:16 2023 +0800

    update_lint non_reentrant_functions

    Signed-off-by: mojave2 <0109chenchen@gmail.com>

commit 9845b3a
Author: mojave2 <0109chenchen@gmail.com>
Date:   Sat Jun 17 16:32:10 2023 +0800

    improve implementation by dogfood

    Signed-off-by: mojave2 <0109chenchen@gmail.com>

commit a3a1415
Author: mojave2 <0109chenchen@gmail.com>
Date:   Sat Jun 17 15:29:11 2023 +0800

    doc-comment non_reentrant_functions

    Signed-off-by: mojave2 <0109chenchen@gmail.com>

commit eb80bb0
Author: mojave2 <0109chenchen@gmail.com>
Date:   Sat Jun 17 15:14:34 2023 +0800

    new_lint non_reentrant_functions

    Signed-off-by: mojave2 <0109chenchen@gmail.com>

commit af6c9d4
Merge: 38ab3a3 33ddd19
Author: surechen <chenshuo17@huawei.com>
Date:   Mon Jun 26 10:54:08 2023 +0800

    Merge pull request rust-lang#7 from J-ZhengLi/dev_stable

    fix test fail after dev fmt of [`implicit_abi`]

commit 33ddd19
Author: J-ZhengLi <lizheng135@huawei.com>
Date:   Mon Jun 26 10:15:26 2023 +0800

    fix test fail after dev fmt of [`implicit_abi`]

    Signed-off-by: J-ZhengLi <lizheng135@huawei.com>

commit 38ab3a3
Merge: 83e42a2 5ce5313
Author: surechen <chenshuo17@huawei.com>
Date:   Mon Jun 26 09:47:22 2023 +0800

    Merge pull request rust-lang#1 from J-ZhengLi/dev_stable

    add new lints: [`mem_unsafe_functions`], [`unsafe_block_in_proc_macro`] and [`implicit_abi`]

commit 5ce5313
Author: J-ZhengLi <lizheng135@huawei.com>
Date:   Wed Jun 21 11:24:29 2023 +0800

    add new lint [`implicit_abi`]
    that detects external block without explicit label "C"

    Signed-off-by: J-ZhengLi <lizheng135@huawei.com>

commit cc5ab4a
Author: J-ZhengLi <lizheng135@huawei.com>
Date:   Tue Jun 20 12:44:02 2023 +0800

    add new lint [`unsafe_block_in_proc_macro`]
    that detects unsafe block in `quote!`

    Signed-off-by: J-ZhengLi <lizheng135@huawei.com>

commit c091b77
Author: J-ZhengLi <lizheng135@huawei.com>
Date:   Sat Jun 17 15:59:56 2023 +0800

    add configuration for lint [`mem_unsafe_functions`];
    finish implement lint [`mem_unsafe_functions`];
    add simple description for unimplemented lints;

    Signed-off-by: J-ZhengLi <lizheng135@huawei.com>

commit a50f308
Author: J-ZhengLi <lizheng135@huawei.com>
Date:   Fri Jun 16 17:45:56 2023 +0800

    init following new lints:

    [`passing_string_to_c_functions`]
    [`untrusted_lib_loading`]
    [`falliable_memory_allocation`]

    Signed-off-by: J-ZhengLi <lizheng135@huawei.com>

commit da3cc15
Author: J-ZhengLi <lizheng135@huawei.com>
Date:   Fri Jun 16 14:11:59 2023 +0800

    add `guidelines` type and barebone for [`mem_unsafe_functions`] lint

    Signed-off-by: J-ZhengLi <lizheng135@huawei.com>

# Conflicts:
#	clippy_lints/src/lib.rs
surechen added a commit to surechen/rust-clippy that referenced this issue Jun 26, 2023
@surechen
Merge pull request rust-lang#5 from mojave2/lint_loop_exit
3a413b7 
new_lint loop_without_break_or_return
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A-lint Area: New lints E-medium Call for participation: Medium difficulty level problem and requires some initial experience. T-middle Type: Probably requires verifiying types
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Added the [unnecessary_box_returns] lint botahamec/rust-clippy
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