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Create a Default trait for an empty format string - #8564

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alexcrichton:ifmt+++
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Create a Default trait for an empty format string#8564
alexcrichton wants to merge 2 commits into
rust-lang:masterfrom
alexcrichton:ifmt+++

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@alexcrichtonalexcrichton commented Aug 16, 2013

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See discussion in #8489, but this selects option 3 by adding a Default trait to be implemented by various basic types.

Once this makes it into a snapshot I think it's about time to start overhauling all current use-cases of fmt! to move towards ifmt!. The goal is to replace %X with {} in 90% of situations, and this commit should enable that.

@alexcrichton
Implement{:s}for ~str and@stras well
1092744
@alexcrichton
Delegate {} to Default instead of Poly
22c7bbf
By using a separate trait this is overridable on a per-type basis and makes room
for the possibility of even more arguments passed in for the future.
bors added a commit that referenced this pull request Aug 19, 2013
@bors
auto merge of#8564: alexcrichton/rust/ifmt+++, r=graydon
3e4f40e
See discussion in #8489, but this selects option 3 by adding a `Default` trait to be implemented by various basic types.
Once this makes it into a snapshot I think it's about time to start overhauling all current use-cases of `fmt!` to move towards `ifmt!`. The goal is to replace `%X` with `{}` in 90% of situations, and this commit should enable that.
@borsbors closed this Aug 19, 2013
@alexcrichtonalexcrichton mentioned this pull request Aug 19, 2013
Closed
flip1995 pushed a commit to flip1995/rust that referenced this pull request Jun 4, 2022
@bors
Auto merge ofrust-lang#8564- Jarcho:transmute_erase_regions, r=Alex…
7000e75
…endoo
Don't lint `useless_transmute` on types with erased regions
fixesrust-lang#6356fixesrust-lang#3340fixesrust-lang#2906
This should get a proper fix at some point, but this at least gets the lint running on some types.
cc rust-lang#5343
changelog: Don't lint `useless_transmute` on types with erased regions
U007D pushed a commit to U007D/rust-mos that referenced this pull request Aug 21, 2026
@bors@jonas-schievink
Mergerust-lang#8564
d39873e
8564: Expand `global_asm!` to nothing r=jonas-schievink a=jonas-schievink
fixesrust-lang/rust-analyzer#8563
bors r+
Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
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var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
Create a `Default` trait for an empty format string by alexcrichton · Pull Request #8564 · rust-lang/rust · GitHub
Skip to content
Create a Default trait for an empty format string - #8564
Closed
alexcrichton wants to merge 2 commits into
rust-lang:masterfrom 
alexcrichton:ifmt+++
Closed
Create a Default trait for an empty format string#8564
alexcrichton wants to merge 2 commits into
rust-lang:masterfrom 
alexcrichton:ifmt+++
Conversation
@alexcrichton
@alexcrichtonalexcrichton
commented
Aug 16, 2013

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See discussion in #8489, but this selects option 3 by adding a Default trait to be implemented by various basic types.
Once this makes it into a snapshot I think it's about time to start overhauling all current use-cases of fmt! to move towards ifmt!. The goal is to replace %X with {} in 90% of situations, and this commit should enable that.
@alexcrichton
Implement{:s}for ~str and@stras well
1092744
@alexcrichton
Delegate {} to Default instead of Poly
22c7bbf
By using a separate trait this is overridable on a per-type basis and makes room
for the possibility of even more arguments passed in for the future.
bors added a commit
that referenced
this pull request
Aug 19, 2013
@bors
auto merge of#8564: alexcrichton/rust/ifmt+++, r=graydon
3e4f40e
See discussion in #8489, but this selects option 3 by adding a `Default` trait to be implemented by various basic types.
Once this makes it into a snapshot I think it's about time to start overhauling all current use-cases of `fmt!` to move towards `ifmt!`. The goal is to replace `%X` with `{}` in 90% of situations, and this commit should enable that.
@borsbors
closed this
Aug 19, 2013
@alexcrichtonalexcrichton
mentioned this pull request
Aug 19, 2013

Closed

flip1995 pushed a commit
to flip1995/rust
that referenced
this pull request
Jun 4, 2022
@bors
Auto merge ofrust-lang#8564- Jarcho:transmute_erase_regions, r=Alex…
7000e75
…endoo
Don't lint `useless_transmute` on types with erased regions
fixesrust-lang#6356fixesrust-lang#3340fixesrust-lang#2906
This should get a proper fix at some point, but this at least gets the lint running on some types.
cc rust-lang#5343
changelog: Don't lint `useless_transmute` on types with erased regions
U007D pushed a commit
to U007D/rust-mos
that referenced
this pull request
Aug 21, 2026
@bors@jonas-schievink
Mergerust-lang#8564
d39873e
8564: Expand `global_asm!` to nothing r=jonas-schievink a=jonas-schievink
fixesrust-lang/rust-analyzer#8563
bors r+
Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
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, 'i');
if (__m === '*' || __re.test(location.href)) {
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var style = document.createElement('style');
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Create a `Default` trait for an empty format string by alexcrichton · Pull Request #8564 · rust-lang/rust · GitHub
Skip to content
Create a Default trait for an empty format string - #8564
Closed
alexcrichton wants to merge 2 commits into
rust-lang:masterfrom 
alexcrichton:ifmt+++
Closed
Create a Default trait for an empty format string#8564
alexcrichton wants to merge 2 commits into
rust-lang:masterfrom 
alexcrichton:ifmt+++
Conversation
@alexcrichton
@alexcrichtonalexcrichton
commented
Aug 16, 2013

Copy link


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See discussion in #8489, but this selects option 3 by adding a Default trait to be implemented by various basic types.
Once this makes it into a snapshot I think it's about time to start overhauling all current use-cases of fmt! to move towards ifmt!. The goal is to replace %X with {} in 90% of situations, and this commit should enable that.
@alexcrichton
Implement{:s}for ~str and@stras well
1092744
@alexcrichton
Delegate {} to Default instead of Poly
22c7bbf
By using a separate trait this is overridable on a per-type basis and makes room
for the possibility of even more arguments passed in for the future.
bors added a commit
that referenced
this pull request
Aug 19, 2013
@bors
auto merge of#8564: alexcrichton/rust/ifmt+++, r=graydon
3e4f40e
See discussion in #8489, but this selects option 3 by adding a `Default` trait to be implemented by various basic types.
Once this makes it into a snapshot I think it's about time to start overhauling all current use-cases of `fmt!` to move towards `ifmt!`. The goal is to replace `%X` with `{}` in 90% of situations, and this commit should enable that.
@borsbors
closed this
Aug 19, 2013
@alexcrichtonalexcrichton
mentioned this pull request
Aug 19, 2013

Closed

flip1995 pushed a commit
to flip1995/rust
that referenced
this pull request
Jun 4, 2022
@bors
Auto merge ofrust-lang#8564- Jarcho:transmute_erase_regions, r=Alex…
7000e75
…endoo
Don't lint `useless_transmute` on types with erased regions
fixesrust-lang#6356fixesrust-lang#3340fixesrust-lang#2906
This should get a proper fix at some point, but this at least gets the lint running on some types.
cc rust-lang#5343
changelog: Don't lint `useless_transmute` on types with erased regions
U007D pushed a commit
to U007D/rust-mos
that referenced
this pull request
Aug 21, 2026
@bors@jonas-schievink
Mergerust-lang#8564
d39873e
8564: Expand `global_asm!` to nothing r=jonas-schievink a=jonas-schievink
fixesrust-lang/rust-analyzer#8563
bors r+
Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
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, 'i');
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} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Create a `Default` trait for an empty format string by alexcrichton · Pull Request #8564 · rust-lang/rust · GitHub
Skip to content
Create a Default trait for an empty format string - #8564
Closed
alexcrichton wants to merge 2 commits into
rust-lang:masterfrom 
alexcrichton:ifmt+++
Closed
Create a Default trait for an empty format string#8564
alexcrichton wants to merge 2 commits into
rust-lang:masterfrom 
alexcrichton:ifmt+++
Conversation
@alexcrichton
@alexcrichtonalexcrichton
commented
Aug 16, 2013

Copy link


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Member
See discussion in #8489, but this selects option 3 by adding a Default trait to be implemented by various basic types.
Once this makes it into a snapshot I think it's about time to start overhauling all current use-cases of fmt! to move towards ifmt!. The goal is to replace %X with {} in 90% of situations, and this commit should enable that.
@alexcrichton
Implement{:s}for ~str and@stras well
1092744
@alexcrichton
Delegate {} to Default instead of Poly
22c7bbf
By using a separate trait this is overridable on a per-type basis and makes room
for the possibility of even more arguments passed in for the future.
bors added a commit
that referenced
this pull request
Aug 19, 2013
@bors
auto merge of#8564: alexcrichton/rust/ifmt+++, r=graydon
3e4f40e
See discussion in #8489, but this selects option 3 by adding a `Default` trait to be implemented by various basic types.
Once this makes it into a snapshot I think it's about time to start overhauling all current use-cases of `fmt!` to move towards `ifmt!`. The goal is to replace `%X` with `{}` in 90% of situations, and this commit should enable that.
@borsbors
closed this
Aug 19, 2013
@alexcrichtonalexcrichton
mentioned this pull request
Aug 19, 2013

Closed

flip1995 pushed a commit
to flip1995/rust
that referenced
this pull request
Jun 4, 2022
@bors
Auto merge ofrust-lang#8564- Jarcho:transmute_erase_regions, r=Alex…
7000e75
…endoo
Don't lint `useless_transmute` on types with erased regions
fixesrust-lang#6356fixesrust-lang#3340fixesrust-lang#2906
This should get a proper fix at some point, but this at least gets the lint running on some types.
cc rust-lang#5343
changelog: Don't lint `useless_transmute` on types with erased regions
U007D pushed a commit
to U007D/rust-mos
that referenced
this pull request
Aug 21, 2026
@bors@jonas-schievink
Mergerust-lang#8564
d39873e
8564: Expand `global_asm!` to nothing r=jonas-schievink a=jonas-schievink
fixesrust-lang/rust-analyzer#8563
bors r+
Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
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3 participants

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, 'i');
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})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
Create a `Default` trait for an empty format string by alexcrichton · Pull Request #8564 · rust-lang/rust · GitHub
Skip to content
Create a Default trait for an empty format string - #8564
Closed
alexcrichton wants to merge 2 commits into
rust-lang:masterfrom 
alexcrichton:ifmt+++
Closed
Create a Default trait for an empty format string#8564
alexcrichton wants to merge 2 commits into
rust-lang:masterfrom 
alexcrichton:ifmt+++
Conversation
@alexcrichton
@alexcrichtonalexcrichton
commented
Aug 16, 2013

Copy link


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Member
See discussion in #8489, but this selects option 3 by adding a Default trait to be implemented by various basic types.
Once this makes it into a snapshot I think it's about time to start overhauling all current use-cases of fmt! to move towards ifmt!. The goal is to replace %X with {} in 90% of situations, and this commit should enable that.
@alexcrichton
Implement{:s}for ~str and@stras well
1092744
@alexcrichton
Delegate {} to Default instead of Poly
22c7bbf
By using a separate trait this is overridable on a per-type basis and makes room
for the possibility of even more arguments passed in for the future.
bors added a commit
that referenced
this pull request
Aug 19, 2013
@bors
auto merge of#8564: alexcrichton/rust/ifmt+++, r=graydon
3e4f40e
See discussion in #8489, but this selects option 3 by adding a `Default` trait to be implemented by various basic types.
Once this makes it into a snapshot I think it's about time to start overhauling all current use-cases of `fmt!` to move towards `ifmt!`. The goal is to replace `%X` with `{}` in 90% of situations, and this commit should enable that.
@borsbors
closed this
Aug 19, 2013
@alexcrichtonalexcrichton
mentioned this pull request
Aug 19, 2013

Closed

flip1995 pushed a commit
to flip1995/rust
that referenced
this pull request
Jun 4, 2022
@bors
Auto merge ofrust-lang#8564- Jarcho:transmute_erase_regions, r=Alex…
7000e75
…endoo
Don't lint `useless_transmute` on types with erased regions
fixesrust-lang#6356fixesrust-lang#3340fixesrust-lang#2906
This should get a proper fix at some point, but this at least gets the lint running on some types.
cc rust-lang#5343
changelog: Don't lint `useless_transmute` on types with erased regions
U007D pushed a commit
to U007D/rust-mos
that referenced
this pull request
Aug 21, 2026
@bors@jonas-schievink
Mergerust-lang#8564
d39873e
8564: Expand `global_asm!` to nothing r=jonas-schievink a=jonas-schievink
fixesrust-lang/rust-analyzer#8563
bors r+
Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
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3 participants

@alexcrichton@graydon@bors

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
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function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
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})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Create a `Default` trait for an empty format string by alexcrichton · Pull Request #8564 · rust-lang/rust · GitHub
Skip to content
Create a Default trait for an empty format string - #8564
Closed
alexcrichton wants to merge 2 commits into
rust-lang:masterfrom 
alexcrichton:ifmt+++
Closed
Create a Default trait for an empty format string#8564
alexcrichton wants to merge 2 commits into
rust-lang:masterfrom 
alexcrichton:ifmt+++
Conversation
@alexcrichton
@alexcrichtonalexcrichton
commented
Aug 16, 2013

Copy link


Copy Markdown

Member
See discussion in #8489, but this selects option 3 by adding a Default trait to be implemented by various basic types.
Once this makes it into a snapshot I think it's about time to start overhauling all current use-cases of fmt! to move towards ifmt!. The goal is to replace %X with {} in 90% of situations, and this commit should enable that.
@alexcrichton
Implement{:s}for ~str and@stras well
1092744
@alexcrichton
Delegate {} to Default instead of Poly
22c7bbf
By using a separate trait this is overridable on a per-type basis and makes room
for the possibility of even more arguments passed in for the future.
bors added a commit
that referenced
this pull request
Aug 19, 2013
@bors
auto merge of#8564: alexcrichton/rust/ifmt+++, r=graydon
3e4f40e
See discussion in #8489, but this selects option 3 by adding a `Default` trait to be implemented by various basic types.
Once this makes it into a snapshot I think it's about time to start overhauling all current use-cases of `fmt!` to move towards `ifmt!`. The goal is to replace `%X` with `{}` in 90% of situations, and this commit should enable that.
@borsbors
closed this
Aug 19, 2013
@alexcrichtonalexcrichton
mentioned this pull request
Aug 19, 2013

Closed

flip1995 pushed a commit
to flip1995/rust
that referenced
this pull request
Jun 4, 2022
@bors
Auto merge ofrust-lang#8564- Jarcho:transmute_erase_regions, r=Alex…
7000e75
…endoo
Don't lint `useless_transmute` on types with erased regions
fixesrust-lang#6356fixesrust-lang#3340fixesrust-lang#2906
This should get a proper fix at some point, but this at least gets the lint running on some types.
cc rust-lang#5343
changelog: Don't lint `useless_transmute` on types with erased regions
U007D pushed a commit
to U007D/rust-mos
that referenced
this pull request
Aug 21, 2026
@bors@jonas-schievink
Mergerust-lang#8564
d39873e
8564: Expand `global_asm!` to nothing r=jonas-schievink a=jonas-schievink
fixesrust-lang/rust-analyzer#8563
bors r+
Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
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3 participants

@alexcrichton@graydon@bors

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
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Create a `Default` trait for an empty format string by alexcrichton · Pull Request #8564 · rust-lang/rust · GitHub
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Create a Default trait for an empty format string - #8564
Closed
alexcrichton wants to merge 2 commits into
rust-lang:masterfrom 
alexcrichton:ifmt+++
Closed
Create a Default trait for an empty format string#8564
alexcrichton wants to merge 2 commits into
rust-lang:masterfrom 
alexcrichton:ifmt+++
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@alexcrichton
@alexcrichtonalexcrichton
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Aug 16, 2013

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See discussion in #8489, but this selects option 3 by adding a Default trait to be implemented by various basic types.
Once this makes it into a snapshot I think it's about time to start overhauling all current use-cases of fmt! to move towards ifmt!. The goal is to replace %X with {} in 90% of situations, and this commit should enable that.
@alexcrichton
Implement{:s}for ~str and@stras well
1092744
@alexcrichton
Delegate {} to Default instead of Poly
22c7bbf
By using a separate trait this is overridable on a per-type basis and makes room
for the possibility of even more arguments passed in for the future.
bors added a commit
that referenced
this pull request
Aug 19, 2013
@bors
auto merge of#8564: alexcrichton/rust/ifmt+++, r=graydon
3e4f40e
See discussion in #8489, but this selects option 3 by adding a `Default` trait to be implemented by various basic types.
Once this makes it into a snapshot I think it's about time to start overhauling all current use-cases of `fmt!` to move towards `ifmt!`. The goal is to replace `%X` with `{}` in 90% of situations, and this commit should enable that.
@borsbors
closed this
Aug 19, 2013
@alexcrichtonalexcrichton
mentioned this pull request
Aug 19, 2013

Closed

flip1995 pushed a commit
to flip1995/rust
that referenced
this pull request
Jun 4, 2022
@bors
Auto merge ofrust-lang#8564- Jarcho:transmute_erase_regions, r=Alex…
7000e75
…endoo
Don't lint `useless_transmute` on types with erased regions
fixesrust-lang#6356fixesrust-lang#3340fixesrust-lang#2906
This should get a proper fix at some point, but this at least gets the lint running on some types.
cc rust-lang#5343
changelog: Don't lint `useless_transmute` on types with erased regions
U007D pushed a commit
to U007D/rust-mos
that referenced
this pull request
Aug 21, 2026
@bors@jonas-schievink
Mergerust-lang#8564
d39873e
8564: Expand `global_asm!` to nothing r=jonas-schievink a=jonas-schievink
fixesrust-lang/rust-analyzer#8563
bors r+
Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
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Create a `Default` trait for an empty format string by alexcrichton · Pull Request #8564 · rust-lang/rust · GitHub
Skip to content
Create a Default trait for an empty format string - #8564
Closed
alexcrichton wants to merge 2 commits into
rust-lang:masterfrom 
alexcrichton:ifmt+++
Closed
Create a Default trait for an empty format string#8564
alexcrichton wants to merge 2 commits into
rust-lang:masterfrom 
alexcrichton:ifmt+++
Conversation
@alexcrichton
@alexcrichtonalexcrichton
commented
Aug 16, 2013

Copy link


Copy Markdown

Member
See discussion in #8489, but this selects option 3 by adding a Default trait to be implemented by various basic types.
Once this makes it into a snapshot I think it's about time to start overhauling all current use-cases of fmt! to move towards ifmt!. The goal is to replace %X with {} in 90% of situations, and this commit should enable that.
@alexcrichton
Implement{:s}for ~str and@stras well
1092744
@alexcrichton
Delegate {} to Default instead of Poly
22c7bbf
By using a separate trait this is overridable on a per-type basis and makes room
for the possibility of even more arguments passed in for the future.
bors added a commit
that referenced
this pull request
Aug 19, 2013
@bors
auto merge of#8564: alexcrichton/rust/ifmt+++, r=graydon
3e4f40e
See discussion in #8489, but this selects option 3 by adding a `Default` trait to be implemented by various basic types.
Once this makes it into a snapshot I think it's about time to start overhauling all current use-cases of `fmt!` to move towards `ifmt!`. The goal is to replace `%X` with `{}` in 90% of situations, and this commit should enable that.
@borsbors
closed this
Aug 19, 2013
@alexcrichtonalexcrichton
mentioned this pull request
Aug 19, 2013

Closed

flip1995 pushed a commit
to flip1995/rust
that referenced
this pull request
Jun 4, 2022
@bors
Auto merge ofrust-lang#8564- Jarcho:transmute_erase_regions, r=Alex…
7000e75
…endoo
Don't lint `useless_transmute` on types with erased regions
fixesrust-lang#6356fixesrust-lang#3340fixesrust-lang#2906
This should get a proper fix at some point, but this at least gets the lint running on some types.
cc rust-lang#5343
changelog: Don't lint `useless_transmute` on types with erased regions
U007D pushed a commit
to U007D/rust-mos
that referenced
this pull request
Aug 21, 2026
@bors@jonas-schievink
Mergerust-lang#8564
d39873e
8564: Expand `global_asm!` to nothing r=jonas-schievink a=jonas-schievink
fixesrust-lang/rust-analyzer#8563
bors r+
Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
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3 participants

@alexcrichton@graydon@bors