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rust/tests/ui/proc-macro/issue-75734-pp-paren.stdout

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Pretty print empty blocks as {}
2021-12-01 13:45:14 -06:00
PRINT-ATTR INPUT (DISPLAY): fn main() { & | _ : u8 | {} ; mul_2! (1 + 1) ; }
Allow skipping extra paren insertion during AST pretty-printing Fixes #74616 Makes progress towards #43081 Unblocks PR #76130 When pretty-printing an AST node, we may insert additional parenthesis to ensure that precedence is properly preserved in code we output. However, the proc macro implementation relies on comparing a pretty-printed AST node to the captured `TokenStream`. Inserting extra parenthesis changes the structure of the reparsed `TokenStream`, making the comparison fail. This PR refactors the AST pretty-printing code to allow skipping the insertion of additional parenthesis. Several freestanding methods are moved to trait methods on `PrintState`, which keep track of an internal `insert_extra_parens` flag. This flag is normally `true`, but we expose a public method which allows pretty-printing a nonterminal with `insert_extra_parens = false`. To avoid changing the public interface of `rustc_ast_pretty`, the freestanding `_to_string` methods are changed to delegate to a newly-crated `State`. The main pretty-printing code is moved to a new `state` module to ensure that it does not accidentally call any of these public helper functions (instead, the internal functions with the same name should be used).
2020-09-26 11:51:00 -05:00
PRINT-ATTR INPUT (DEBUG): TokenStream [
Ident {
ident: "fn",
span: $DIR/issue-75734-pp-paren.rs:23:1: 23:3 (#0),
},
Ident {
ident: "main",
span: $DIR/issue-75734-pp-paren.rs:23:4: 23:8 (#0),
},
Group {
delimiter: Parenthesis,
stream: TokenStream [],
span: $DIR/issue-75734-pp-paren.rs:23:8: 23:10 (#0),
},
Group {
delimiter: Brace,
stream: TokenStream [
Punct {
ch: '&',
spacing: Joint,
span: $DIR/issue-75734-pp-paren.rs:24:5: 24:6 (#0),
},
Punct {
ch: '|',
spacing: Alone,
span: $DIR/issue-75734-pp-paren.rs:24:6: 24:7 (#0),
},
Ident {
ident: "_",
span: $DIR/issue-75734-pp-paren.rs:24:7: 24:8 (#0),
},
Punct {
ch: ':',
spacing: Alone,
span: $DIR/issue-75734-pp-paren.rs:24:8: 24:9 (#0),
},
Ident {
ident: "u8",
span: $DIR/issue-75734-pp-paren.rs:24:10: 24:12 (#0),
},
Punct {
ch: '|',
spacing: Alone,
span: $DIR/issue-75734-pp-paren.rs:24:12: 24:13 (#0),
},
Group {
delimiter: Brace,
stream: TokenStream [],
span: $DIR/issue-75734-pp-paren.rs:24:14: 24:16 (#0),
},
Punct {
ch: ';',
spacing: Alone,
span: $DIR/issue-75734-pp-paren.rs:24:16: 24:17 (#0),
},
Ident {
ident: "mul_2",
span: $DIR/issue-75734-pp-paren.rs:25:5: 25:10 (#0),
},
Punct {
ch: '!',
spacing: Alone,
span: $DIR/issue-75734-pp-paren.rs:25:10: 25:11 (#0),
},
Group {
delimiter: Parenthesis,
stream: TokenStream [
Literal {
kind: Integer,
symbol: "1",
suffix: None,
span: $DIR/issue-75734-pp-paren.rs:25:12: 25:13 (#0),
},
Punct {
ch: '+',
spacing: Alone,
span: $DIR/issue-75734-pp-paren.rs:25:14: 25:15 (#0),
},
Literal {
kind: Integer,
symbol: "1",
suffix: None,
span: $DIR/issue-75734-pp-paren.rs:25:16: 25:17 (#0),
},
],
span: $DIR/issue-75734-pp-paren.rs:25:11: 25:18 (#0),
},
Punct {
ch: ';',
spacing: Alone,
span: $DIR/issue-75734-pp-paren.rs:25:18: 25:19 (#0),
},
],
span: $DIR/issue-75734-pp-paren.rs:23:11: 26:2 (#0),
},
]
PRINT-BANG INPUT (DISPLAY): 1 + 1 * 2
PRINT-BANG INPUT (DEBUG): TokenStream [
Group {
delimiter: None,
stream: TokenStream [
Literal {
kind: Integer,
symbol: "1",
suffix: None,
span: $DIR/issue-75734-pp-paren.rs:25:12: 25:13 (#0),
},
Punct {
ch: '+',
spacing: Alone,
span: $DIR/issue-75734-pp-paren.rs:25:14: 25:15 (#0),
},
Literal {
kind: Integer,
symbol: "1",
suffix: None,
span: $DIR/issue-75734-pp-paren.rs:25:16: 25:17 (#0),
},
],
span: $DIR/issue-75734-pp-paren.rs:17:21: 17:25 (#7),
},
Punct {
ch: '*',
spacing: Alone,
span: $DIR/issue-75734-pp-paren.rs:17:26: 17:27 (#7),
},
Literal {
kind: Integer,
symbol: "2",
suffix: None,
span: $DIR/issue-75734-pp-paren.rs:17:28: 17:29 (#7),
},
]
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