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Fix {:#?} representation of proc_macro::Literal #72233

Merged
merged 3 commits into from
May 17, 2020
Merged

Fix {:#?} representation of proc_macro::Literal #72233

merged 3 commits into from
May 17, 2020

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dtolnay
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@dtolnay dtolnay commented May 15, 2020

Before:

TokenStream [
    Ident {
        ident: "name",
        span: #0 bytes(37..41),
    },
    Punct {
        ch: '=',
        spacing: Alone,
        span: #0 bytes(42..43),
    },
    Literal { lit: Lit { kind: Str, symbol: "SNPP", suffix: None }, span: Span { lo: BytePos(44), hi: BytePos(50), ctxt: #0 } },
    Punct {
        ch: ',',
        spacing: Alone,
        span: #0 bytes(50..51),
    },
    Ident {
        ident: "owner",
        span: #0 bytes(56..61),
    },
    Punct {
        ch: '=',
        spacing: Alone,
        span: #0 bytes(62..63),
    },
    Literal { lit: Lit { kind: Str, symbol: "Canary M Burns", suffix: None }, span: Span { lo: BytePos(64), hi: BytePos(80), ctxt: #0 } },
]

After:

TokenStream [
    Ident {
        ident: "name",
        span: #0 bytes(37..41),
    },
    Punct {
        ch: '=',
        spacing: Alone,
        span: #0 bytes(42..43),
    },
    Literal {
        kind: Str,
        symbol: "SNPP",
        suffix: None,
        span: #0 bytes(44..50),
    },
    Punct {
        ch: ',',
        spacing: Alone,
        span: #0 bytes(50..51),
    },
    Ident {
        ident: "owner",
        span: #0 bytes(56..61),
    },
    Punct {
        ch: '=',
        spacing: Alone,
        span: #0 bytes(62..63),
    },
    Literal {
        kind: Str,
        symbol: "Canary M Burns",
        suffix: None,
        span: #0 bytes(64..80),
    },
]

@dtolnay
Fix {:#?} representation of proc_macro::Literal
45ee336 
Before:

    TokenStream [
        Ident {
            ident: "name",
            span: #0 bytes(37..41),
        },
        Punct {
            ch: '=',
            spacing: Alone,
            span: #0 bytes(42..43),
        },
        Literal { lit: Lit { kind: Str, symbol: "SNPP", suffix: None }, span: Span { lo: BytePos(44), hi: BytePos(50), ctxt: #0 } },
        Punct {
            ch: ',',
            spacing: Alone,
            span: #0 bytes(50..51),
        },
        Ident {
            ident: "owner",
            span: #0 bytes(56..61),
        },
        Punct {
            ch: '=',
            spacing: Alone,
            span: #0 bytes(62..63),
        },
        Literal { lit: Lit { kind: Str, symbol: "Canary M Burns", suffix: None }, span: Span { lo: BytePos(64), hi: BytePos(80), ctxt: #0 } },
    ]

After:

    TokenStream [
        Ident {
            ident: "name",
            span: #0 bytes(37..41),
        },
        Punct {
            ch: '=',
            spacing: Alone,
            span: #0 bytes(42..43),
        },
        Literal {
            kind: Str,
            symbol: "SNPP",
            suffix: None,
            span: #0 bytes(44..50),
        },
        Punct {
            ch: ',',
            spacing: Alone,
            span: #0 bytes(50..51),
        },
        Ident {
            ident: "owner",
            span: #0 bytes(56..61),
        },
        Punct {
            ch: '=',
            spacing: Alone,
            span: #0 bytes(62..63),
        },
        Literal {
            kind: Str,
            symbol: "Canary M Burns",
            suffix: None,
            span: #0 bytes(64..80),
        },
    ]
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r? @petrochenkov

(rust_highfive has picked a reviewer for you, use r? to override)

@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label May 15, 2020
petrochenkov
petrochenkov reviewed May 15, 2020
View reviewed changes
src/libproc_macro/bridge/client.rs
impl fmt::Debug for Literal {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(&self.debug())
f.debug_struct("Literal")
.field("kind", &format_args!("{}", &self.debug_kind()))
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Suggested change
.field("kind", &format_args!("{}", &self.debug_kind()))
.field("kind", &self.debug_kind())

?

Or is it used to cancel the effect of {:#?}, similarly to the suffix? Could you add a comment then?

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self.debug_kind() is a String so your suggestion prints it with quotes around, which is not what I want. The {} representation prints without quotes, as in kind: Float.

@petrochenkov
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r=me with #72233 (comment) clarified.

@petrochenkov petrochenkov added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels May 15, 2020
dtolnay
dtolnay commented May 15, 2020
View reviewed changes
src/libproc_macro/bridge/client.rs
Comment on lines +208 to +209
// format the kind without quotes, as in `kind: Float`
.field("kind", &format_args!("{}", &self.debug_kind()))
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Added comment.

@dtolnay
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dtolnay commented May 15, 2020

@bors r=petrochenkov

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bors commented May 15, 2020

📌 Commit bea2c59 has been approved by petrochenkov

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels May 15, 2020
Dylan-DPC-zz pushed a commit to Dylan-DPC-zz/rust that referenced this pull request May 15, 2020
@Dylan-DPC
Rollup merge of rust-lang#72233 - dtolnay:literal, r=petrochenkov
27d523d 
Fix {:#?} representation of proc_macro::Literal

Before:

```rust
TokenStream [
    Ident {
        ident: "name",
        span: #0 bytes(37..41),
    },
    Punct {
        ch: '=',
        spacing: Alone,
        span: #0 bytes(42..43),
    },
    Literal { lit: Lit { kind: Str, symbol: "SNPP", suffix: None }, span: Span { lo: BytePos(44), hi: BytePos(50), ctxt: #0 } },
    Punct {
        ch: ',',
        spacing: Alone,
        span: #0 bytes(50..51),
    },
    Ident {
        ident: "owner",
        span: #0 bytes(56..61),
    },
    Punct {
        ch: '=',
        spacing: Alone,
        span: #0 bytes(62..63),
    },
    Literal { lit: Lit { kind: Str, symbol: "Canary M Burns", suffix: None }, span: Span { lo: BytePos(64), hi: BytePos(80), ctxt: #0 } },
]
```

After:

```rust
TokenStream [
    Ident {
        ident: "name",
        span: #0 bytes(37..41),
    },
    Punct {
        ch: '=',
        spacing: Alone,
        span: #0 bytes(42..43),
    },
    Literal {
        kind: Str,
        symbol: "SNPP",
        suffix: None,
        span: #0 bytes(44..50),
    },
    Punct {
        ch: ',',
        spacing: Alone,
        span: #0 bytes(50..51),
    },
    Ident {
        ident: "owner",
        span: #0 bytes(56..61),
    },
    Punct {
        ch: '=',
        spacing: Alone,
        span: #0 bytes(62..63),
    },
    Literal {
        kind: Str,
        symbol: "Canary M Burns",
        suffix: None,
        span: #0 bytes(64..80),
    },
]
```
@Dylan-DPC-zz Dylan-DPC-zz mentioned this pull request May 15, 2020
Closed
Dylan-DPC-zz pushed a commit to Dylan-DPC-zz/rust that referenced this pull request May 15, 2020
@Dylan-DPC
Rollup merge of rust-lang#72233 - dtolnay:literal, r=petrochenkov
3460546 
Fix {:#?} representation of proc_macro::Literal

Before:

```rust
TokenStream [
    Ident {
        ident: "name",
        span: #0 bytes(37..41),
    },
    Punct {
        ch: '=',
        spacing: Alone,
        span: #0 bytes(42..43),
    },
    Literal { lit: Lit { kind: Str, symbol: "SNPP", suffix: None }, span: Span { lo: BytePos(44), hi: BytePos(50), ctxt: #0 } },
    Punct {
        ch: ',',
        spacing: Alone,
        span: #0 bytes(50..51),
    },
    Ident {
        ident: "owner",
        span: #0 bytes(56..61),
    },
    Punct {
        ch: '=',
        spacing: Alone,
        span: #0 bytes(62..63),
    },
    Literal { lit: Lit { kind: Str, symbol: "Canary M Burns", suffix: None }, span: Span { lo: BytePos(64), hi: BytePos(80), ctxt: #0 } },
]
```

After:

```rust
TokenStream [
    Ident {
        ident: "name",
        span: #0 bytes(37..41),
    },
    Punct {
        ch: '=',
        spacing: Alone,
        span: #0 bytes(42..43),
    },
    Literal {
        kind: Str,
        symbol: "SNPP",
        suffix: None,
        span: #0 bytes(44..50),
    },
    Punct {
        ch: ',',
        spacing: Alone,
        span: #0 bytes(50..51),
    },
    Ident {
        ident: "owner",
        span: #0 bytes(56..61),
    },
    Punct {
        ch: '=',
        spacing: Alone,
        span: #0 bytes(62..63),
    },
    Literal {
        kind: Str,
        symbol: "Canary M Burns",
        suffix: None,
        span: #0 bytes(64..80),
    },
]
```
@Dylan-DPC-zz Dylan-DPC-zz mentioned this pull request May 15, 2020
Closed
Dylan-DPC-zz pushed a commit to Dylan-DPC-zz/rust that referenced this pull request May 15, 2020
@Dylan-DPC
Rollup merge of rust-lang#72233 - dtolnay:literal, r=petrochenkov
707625b 
Fix {:#?} representation of proc_macro::Literal

Before:

```rust
TokenStream [
    Ident {
        ident: "name",
        span: #0 bytes(37..41),
    },
    Punct {
        ch: '=',
        spacing: Alone,
        span: #0 bytes(42..43),
    },
    Literal { lit: Lit { kind: Str, symbol: "SNPP", suffix: None }, span: Span { lo: BytePos(44), hi: BytePos(50), ctxt: #0 } },
    Punct {
        ch: ',',
        spacing: Alone,
        span: #0 bytes(50..51),
    },
    Ident {
        ident: "owner",
        span: #0 bytes(56..61),
    },
    Punct {
        ch: '=',
        spacing: Alone,
        span: #0 bytes(62..63),
    },
    Literal { lit: Lit { kind: Str, symbol: "Canary M Burns", suffix: None }, span: Span { lo: BytePos(64), hi: BytePos(80), ctxt: #0 } },
]
```

After:

```rust
TokenStream [
    Ident {
        ident: "name",
        span: #0 bytes(37..41),
    },
    Punct {
        ch: '=',
        spacing: Alone,
        span: #0 bytes(42..43),
    },
    Literal {
        kind: Str,
        symbol: "SNPP",
        suffix: None,
        span: #0 bytes(44..50),
    },
    Punct {
        ch: ',',
        spacing: Alone,
        span: #0 bytes(50..51),
    },
    Ident {
        ident: "owner",
        span: #0 bytes(56..61),
    },
    Punct {
        ch: '=',
        spacing: Alone,
        span: #0 bytes(62..63),
    },
    Literal {
        kind: Str,
        symbol: "Canary M Burns",
        suffix: None,
        span: #0 bytes(64..80),
    },
]
```
This was referenced May 15, 2020
Closed
Merged
bors added a commit to rust-lang-ci/rust that referenced this pull request May 17, 2020
@bors
Auto merge of rust-lang#72286 - Dylan-DPC:rollup-n3rk6df, r=Dylan-DPC
09739c2 
Rollup of 4 pull requests

Successful merges:

 - rust-lang#72233 (Fix {:#?} representation of proc_macro::Literal)
 - rust-lang#72277 (emphasize that ManuallyDrop is safe-to-access and unsafe-to-drop)
 - rust-lang#72281 (Fix whitespace in `?Sized` structured suggestion)
 - rust-lang#72282 (Fix issue number typo in note)

Failed merges:

r? @ghost
@bors bors merged commit fc91043 into rust-lang:master May 17, 2020
@dtolnay dtolnay deleted the literal branch May 17, 2020 17:24
@robojumper robojumper mentioned this pull request May 31, 2020
Merged
bors bot added a commit to rust-lang/rust-analyzer that referenced this pull request Jun 5, 2020
@bors @robojumper
Merge #4676
8c2ecd7 
4676: proc_macro: fix current nightly/future stable ABI incompatibility r=matklad a=robojumper

With rust-lang/rust#72233, the proc_macro ABI has changed, leading to the `test_derive_serialize_proc_macro` test believing (on nightly) that `serde` wants to pass the struct name as a byte string literal instead of a string literal.

This fixes the test on nightly, but obviously breaks it on stable. As a result, this should be merged when Rust stable `1.45` releases on 2020-07-16. The PR is a draft as to not accidentally merge this too early. People working on nightly can simply apply the commit if they want a fully passing test suite.

Co-authored-by: robojumper <[email protected]>
bors bot added a commit to rust-lang/rust-analyzer that referenced this pull request Jul 16, 2020
@bors @robojumper
Merge #4676
9210fcc 
4676: proc_macro: fix current nightly/future stable ABI incompatibility r=matklad a=robojumper

With rust-lang/rust#72233, the proc_macro ABI has changed, leading to the `test_derive_serialize_proc_macro` test believing that `serde` wants to pass the struct name as a byte string literal instead of a string literal.

Fixes #4866.

Co-authored-by: robojumper <[email protected]>
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