squawk_syntax/ast/
node_ext.rs

1// via https://github.com/rust-lang/rust-analyzer/blob/d8887c0758bbd2d5f752d5bd405d4491e90e7ed6/crates/syntax/src/ast/node_ext.rs
2//
3// Permission is hereby granted, free of charge, to any
4// person obtaining a copy of this software and associated
5// documentation files (the "Software"), to deal in the
6// Software without restriction, including without
7// limitation the rights to use, copy, modify, merge,
8// publish, distribute, sublicense, and/or sell copies of
9// the Software, and to permit persons to whom the Software
10// is furnished to do so, subject to the following
11// conditions:
12//
13// The above copyright notice and this permission notice
14// shall be included in all copies or substantial portions
15// of the Software.
16//
17// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
18// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
19// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
20// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
21// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
22// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
24// IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
25// DEALINGS IN THE SOFTWARE.
26
27use std::borrow::Cow;
28
29#[cfg(test)]
30use insta::assert_snapshot;
31use rowan::{GreenNodeData, GreenTokenData, NodeOrToken};
32
33#[cfg(test)]
34use crate::SourceFile;
35use rowan::Direction;
36
37use crate::ast;
38use crate::ast::AstNode;
39use crate::{SyntaxKind, SyntaxNode, SyntaxToken, TokenText};
40
41use super::support;
42
43#[derive(Debug, Clone, PartialEq, Eq)]
44pub enum LitKind {
45    BitString(SyntaxToken),
46    ByteString(SyntaxToken),
47    DollarQuotedString(SyntaxToken),
48    EscString(SyntaxToken),
49    FloatNumber(SyntaxToken),
50    IntNumber(SyntaxToken),
51    Null(SyntaxToken),
52    PositionalParam(SyntaxToken),
53    String(SyntaxToken),
54    UnicodeEscString(SyntaxToken),
55}
56
57impl ast::Literal {
58    pub fn kind(&self) -> Option<LitKind> {
59        let token = self.syntax().first_child_or_token()?.into_token()?;
60        let kind = match token.kind() {
61            SyntaxKind::STRING => LitKind::String(token),
62            SyntaxKind::NULL_KW => LitKind::Null(token),
63            SyntaxKind::FLOAT_NUMBER => LitKind::FloatNumber(token),
64            SyntaxKind::INT_NUMBER => LitKind::IntNumber(token),
65            SyntaxKind::BYTE_STRING => LitKind::ByteString(token),
66            SyntaxKind::BIT_STRING => LitKind::BitString(token),
67            SyntaxKind::DOLLAR_QUOTED_STRING => LitKind::DollarQuotedString(token),
68            SyntaxKind::UNICODE_ESC_STRING => LitKind::UnicodeEscString(token),
69            SyntaxKind::ESC_STRING => LitKind::EscString(token),
70            SyntaxKind::POSITIONAL_PARAM => LitKind::PositionalParam(token),
71            _ => return None,
72        };
73        Some(kind)
74    }
75}
76
77impl ast::Constraint {
78    #[inline]
79    pub fn constraint_name(&self) -> Option<ast::ConstraintName> {
80        support::child(self.syntax())
81    }
82}
83
84#[derive(Debug, Clone, PartialEq, Eq)]
85pub enum BinOp {
86    And(SyntaxToken),
87    AtTimeZone(ast::AtTimeZone),
88    Caret(SyntaxToken),
89    Collate(SyntaxToken),
90    ColonColon(ast::ColonColon),
91    ColonEq(ast::ColonEq),
92    CustomOp(ast::CustomOp),
93    Eq(SyntaxToken),
94    FatArrow(ast::FatArrow),
95    Gteq(ast::Gteq),
96    Ilike(SyntaxToken),
97    In(SyntaxToken),
98    Is(SyntaxToken),
99    IsDistinctFrom(ast::IsDistinctFrom),
100    IsNot(ast::IsNot),
101    IsNotDistinctFrom(ast::IsNotDistinctFrom),
102    LAngle(SyntaxToken),
103    Like(SyntaxToken),
104    Lteq(ast::Lteq),
105    Minus(SyntaxToken),
106    Neq(ast::Neq),
107    Neqb(ast::Neqb),
108    NotIlike(ast::NotIlike),
109    NotIn(ast::NotIn),
110    NotLike(ast::NotLike),
111    NotSimilarTo(ast::NotSimilarTo),
112    OperatorCall(ast::OperatorCall),
113    Or(SyntaxToken),
114    Overlaps(SyntaxToken),
115    Percent(SyntaxToken),
116    Plus(SyntaxToken),
117    RAngle(SyntaxToken),
118    SimilarTo(ast::SimilarTo),
119    Slash(SyntaxToken),
120    Star(SyntaxToken),
121}
122
123#[derive(Debug, Clone, PartialEq, Eq)]
124pub enum PostfixOp {
125    AtLocal(SyntaxToken),
126    IsJson(ast::IsJson),
127    IsJsonArray(ast::IsJsonArray),
128    IsJsonObject(ast::IsJsonObject),
129    IsJsonScalar(ast::IsJsonScalar),
130    IsJsonValue(ast::IsJsonValue),
131    IsNormalized(ast::IsNormalized),
132    IsNotJson(ast::IsNotJson),
133    IsNotJsonArray(ast::IsNotJsonArray),
134    IsNotJsonObject(ast::IsNotJsonObject),
135    IsNotJsonScalar(ast::IsNotJsonScalar),
136    IsNotJsonValue(ast::IsNotJsonValue),
137    IsNotNormalized(ast::IsNotNormalized),
138    IsNull(SyntaxToken),
139    NotNull(SyntaxToken),
140}
141
142impl ast::BinExpr {
143    #[inline]
144    pub fn lhs(&self) -> Option<ast::Expr> {
145        support::children(self.syntax()).next()
146    }
147
148    #[inline]
149    pub fn rhs(&self) -> Option<ast::Expr> {
150        support::children(self.syntax()).nth(1)
151    }
152
153    pub fn op(&self) -> Option<BinOp> {
154        let lhs = self.lhs()?;
155        for child in lhs.syntax().siblings_with_tokens(Direction::Next).skip(1) {
156            match child {
157                NodeOrToken::Token(token) => {
158                    let op = match token.kind() {
159                        SyntaxKind::AND_KW => BinOp::And(token),
160                        SyntaxKind::CARET => BinOp::Caret(token),
161                        SyntaxKind::COLLATE_KW => BinOp::Collate(token),
162                        SyntaxKind::EQ => BinOp::Eq(token),
163                        SyntaxKind::ILIKE_KW => BinOp::Ilike(token),
164                        SyntaxKind::IN_KW => BinOp::In(token),
165                        SyntaxKind::IS_KW => BinOp::Is(token),
166                        SyntaxKind::L_ANGLE => BinOp::LAngle(token),
167                        SyntaxKind::LIKE_KW => BinOp::Like(token),
168                        SyntaxKind::MINUS => BinOp::Minus(token),
169                        SyntaxKind::OR_KW => BinOp::Or(token),
170                        SyntaxKind::OVERLAPS_KW => BinOp::Overlaps(token),
171                        SyntaxKind::PERCENT => BinOp::Percent(token),
172                        SyntaxKind::PLUS => BinOp::Plus(token),
173                        SyntaxKind::R_ANGLE => BinOp::RAngle(token),
174                        SyntaxKind::SLASH => BinOp::Slash(token),
175                        SyntaxKind::STAR => BinOp::Star(token),
176                        _ => continue,
177                    };
178                    return Some(op);
179                }
180                NodeOrToken::Node(node) => {
181                    let op = match node.kind() {
182                        SyntaxKind::AT_TIME_ZONE => {
183                            BinOp::AtTimeZone(ast::AtTimeZone { syntax: node })
184                        }
185                        SyntaxKind::COLON_COLON => {
186                            BinOp::ColonColon(ast::ColonColon { syntax: node })
187                        }
188                        SyntaxKind::COLON_EQ => BinOp::ColonEq(ast::ColonEq { syntax: node }),
189                        SyntaxKind::CUSTOM_OP => BinOp::CustomOp(ast::CustomOp { syntax: node }),
190                        SyntaxKind::FAT_ARROW => BinOp::FatArrow(ast::FatArrow { syntax: node }),
191                        SyntaxKind::GTEQ => BinOp::Gteq(ast::Gteq { syntax: node }),
192                        SyntaxKind::IS_DISTINCT_FROM => {
193                            BinOp::IsDistinctFrom(ast::IsDistinctFrom { syntax: node })
194                        }
195                        SyntaxKind::IS_NOT => BinOp::IsNot(ast::IsNot { syntax: node }),
196                        SyntaxKind::IS_NOT_DISTINCT_FROM => {
197                            BinOp::IsNotDistinctFrom(ast::IsNotDistinctFrom { syntax: node })
198                        }
199                        SyntaxKind::LTEQ => BinOp::Lteq(ast::Lteq { syntax: node }),
200                        SyntaxKind::NEQ => BinOp::Neq(ast::Neq { syntax: node }),
201                        SyntaxKind::NEQB => BinOp::Neqb(ast::Neqb { syntax: node }),
202                        SyntaxKind::NOT_ILIKE => BinOp::NotIlike(ast::NotIlike { syntax: node }),
203                        SyntaxKind::NOT_IN => BinOp::NotIn(ast::NotIn { syntax: node }),
204                        SyntaxKind::NOT_LIKE => BinOp::NotLike(ast::NotLike { syntax: node }),
205                        SyntaxKind::NOT_SIMILAR_TO => {
206                            BinOp::NotSimilarTo(ast::NotSimilarTo { syntax: node })
207                        }
208                        SyntaxKind::OPERATOR_CALL => {
209                            BinOp::OperatorCall(ast::OperatorCall { syntax: node })
210                        }
211                        SyntaxKind::SIMILAR_TO => BinOp::SimilarTo(ast::SimilarTo { syntax: node }),
212                        _ => continue,
213                    };
214                    return Some(op);
215                }
216            }
217        }
218        None
219    }
220}
221
222impl ast::PostfixExpr {
223    pub fn op(&self) -> Option<PostfixOp> {
224        let lhs = self.expr()?;
225
226        let siblings = lhs.syntax().siblings_with_tokens(Direction::Next).skip(1);
227        for child in siblings {
228            match child {
229                NodeOrToken::Token(token) => {
230                    let op = match token.kind() {
231                        SyntaxKind::AT_KW => PostfixOp::AtLocal(token),
232                        SyntaxKind::ISNULL_KW => PostfixOp::IsNull(token),
233                        SyntaxKind::NOTNULL_KW => PostfixOp::NotNull(token),
234                        _ => continue,
235                    };
236                    return Some(op);
237                }
238                NodeOrToken::Node(node) => {
239                    let op = match node.kind() {
240                        SyntaxKind::IS_JSON => PostfixOp::IsJson(ast::IsJson { syntax: node }),
241                        SyntaxKind::IS_JSON_ARRAY => {
242                            PostfixOp::IsJsonArray(ast::IsJsonArray { syntax: node })
243                        }
244                        SyntaxKind::IS_JSON_OBJECT => {
245                            PostfixOp::IsJsonObject(ast::IsJsonObject { syntax: node })
246                        }
247                        SyntaxKind::IS_JSON_SCALAR => {
248                            PostfixOp::IsJsonScalar(ast::IsJsonScalar { syntax: node })
249                        }
250                        SyntaxKind::IS_JSON_VALUE => {
251                            PostfixOp::IsJsonValue(ast::IsJsonValue { syntax: node })
252                        }
253                        SyntaxKind::IS_NORMALIZED => {
254                            PostfixOp::IsNormalized(ast::IsNormalized { syntax: node })
255                        }
256                        SyntaxKind::IS_NOT_JSON => {
257                            PostfixOp::IsNotJson(ast::IsNotJson { syntax: node })
258                        }
259                        SyntaxKind::IS_NOT_JSON_ARRAY => {
260                            PostfixOp::IsNotJsonArray(ast::IsNotJsonArray { syntax: node })
261                        }
262                        SyntaxKind::IS_NOT_JSON_OBJECT => {
263                            PostfixOp::IsNotJsonObject(ast::IsNotJsonObject { syntax: node })
264                        }
265                        SyntaxKind::IS_NOT_JSON_SCALAR => {
266                            PostfixOp::IsNotJsonScalar(ast::IsNotJsonScalar { syntax: node })
267                        }
268                        SyntaxKind::IS_NOT_JSON_VALUE => {
269                            PostfixOp::IsNotJsonValue(ast::IsNotJsonValue { syntax: node })
270                        }
271                        SyntaxKind::IS_NOT_NORMALIZED => {
272                            PostfixOp::IsNotNormalized(ast::IsNotNormalized { syntax: node })
273                        }
274                        _ => continue,
275                    };
276                    return Some(op);
277                }
278            }
279        }
280
281        None
282    }
283}
284
285impl ast::FieldExpr {
286    // We have NameRef as a variant of Expr which complicates things (and it
287    // might not be worth it).
288    // Rust analyzer doesn't do this so it doesn't have to special case this.
289    #[inline]
290    pub fn base(&self) -> Option<ast::Expr> {
291        support::children(self.syntax()).next()
292    }
293    #[inline]
294    pub fn field(&self) -> Option<ast::NameRef> {
295        support::children(self.syntax()).last()
296    }
297}
298
299impl ast::IndexExpr {
300    #[inline]
301    pub fn base(&self) -> Option<ast::Expr> {
302        support::children(&self.syntax).next()
303    }
304    #[inline]
305    pub fn index(&self) -> Option<ast::Expr> {
306        support::children(&self.syntax).nth(1)
307    }
308}
309
310impl ast::SliceExpr {
311    #[inline]
312    pub fn base(&self) -> Option<ast::Expr> {
313        support::children(&self.syntax).next()
314    }
315
316    #[inline]
317    pub fn start(&self) -> Option<ast::Expr> {
318        // With `select x[1:]`, we have two exprs, `x` and `1`.
319        // We skip over the first one, and then we want the second one, but we
320        // want to make sure we don't choose the end expr if instead we had:
321        // `select x[:1]`
322        let colon = self.colon_token()?;
323        support::children(&self.syntax)
324            .skip(1)
325            .find(|expr: &ast::Expr| expr.syntax().text_range().end() <= colon.text_range().start())
326    }
327
328    #[inline]
329    pub fn end(&self) -> Option<ast::Expr> {
330        // We want to make sure we get the last expr after the `:` which is the
331        // end of the slice, i.e., `2` in: `select x[:2]`
332        let colon = self.colon_token()?;
333        support::children(&self.syntax)
334            .find(|expr: &ast::Expr| expr.syntax().text_range().start() >= colon.text_range().end())
335    }
336}
337
338impl ast::RenameColumn {
339    #[inline]
340    pub fn from(&self) -> Option<ast::NameRef> {
341        support::children(&self.syntax).nth(0)
342    }
343    #[inline]
344    pub fn to(&self) -> Option<ast::NameRef> {
345        support::children(&self.syntax).nth(1)
346    }
347}
348
349impl ast::ForeignKeyConstraint {
350    #[inline]
351    pub fn from_columns(&self) -> Option<ast::ColumnList> {
352        support::children(&self.syntax).nth(0)
353    }
354    #[inline]
355    pub fn to_columns(&self) -> Option<ast::ColumnList> {
356        support::children(&self.syntax).nth(1)
357    }
358}
359
360impl ast::BetweenExpr {
361    #[inline]
362    pub fn target(&self) -> Option<ast::Expr> {
363        support::children(&self.syntax).nth(0)
364    }
365    #[inline]
366    pub fn start(&self) -> Option<ast::Expr> {
367        support::children(&self.syntax).nth(1)
368    }
369    #[inline]
370    pub fn end(&self) -> Option<ast::Expr> {
371        support::children(&self.syntax).nth(2)
372    }
373}
374
375impl ast::WhenClause {
376    #[inline]
377    pub fn condition(&self) -> Option<ast::Expr> {
378        support::children(&self.syntax).next()
379    }
380    #[inline]
381    pub fn then(&self) -> Option<ast::Expr> {
382        support::children(&self.syntax).nth(1)
383    }
384}
385
386impl ast::CompoundSelect {
387    #[inline]
388    pub fn lhs(&self) -> Option<ast::SelectVariant> {
389        support::children(&self.syntax).next()
390    }
391    #[inline]
392    pub fn rhs(&self) -> Option<ast::SelectVariant> {
393        support::children(&self.syntax).nth(1)
394    }
395}
396
397impl ast::NameRef {
398    #[inline]
399    pub fn text(&self) -> TokenText<'_> {
400        text_of_first_token(self.syntax())
401    }
402}
403
404impl ast::Name {
405    #[inline]
406    pub fn text(&self) -> TokenText<'_> {
407        text_of_first_token(self.syntax())
408    }
409}
410
411impl ast::CharType {
412    #[inline]
413    pub fn text(&self) -> TokenText<'_> {
414        text_of_first_token(self.syntax())
415    }
416}
417
418impl ast::OpSig {
419    #[inline]
420    pub fn lhs(&self) -> Option<ast::Type> {
421        support::children(self.syntax()).next()
422    }
423
424    #[inline]
425    pub fn rhs(&self) -> Option<ast::Type> {
426        support::children(self.syntax()).nth(1)
427    }
428}
429
430impl ast::CastSig {
431    #[inline]
432    pub fn lhs(&self) -> Option<ast::Type> {
433        support::children(self.syntax()).next()
434    }
435
436    #[inline]
437    pub fn rhs(&self) -> Option<ast::Type> {
438        support::children(self.syntax()).nth(1)
439    }
440}
441
442pub(crate) fn text_of_first_token(node: &SyntaxNode) -> TokenText<'_> {
443    fn first_token(green_ref: &GreenNodeData) -> &GreenTokenData {
444        green_ref
445            .children()
446            .next()
447            .and_then(NodeOrToken::into_token)
448            .unwrap()
449    }
450
451    match node.green() {
452        Cow::Borrowed(green_ref) => TokenText::borrowed(first_token(green_ref).text()),
453        Cow::Owned(green) => TokenText::owned(first_token(&green).to_owned()),
454    }
455}
456
457impl ast::WithQuery {
458    #[inline]
459    pub fn with_clause(&self) -> Option<ast::WithClause> {
460        support::child(self.syntax())
461    }
462}
463
464impl ast::HasParamList for ast::FunctionSig {}
465impl ast::HasParamList for ast::Aggregate {}
466
467impl ast::NameLike for ast::Name {}
468impl ast::NameLike for ast::NameRef {}
469
470impl ast::HasWithClause for ast::Select {}
471impl ast::HasWithClause for ast::SelectInto {}
472impl ast::HasWithClause for ast::Insert {}
473impl ast::HasWithClause for ast::Update {}
474impl ast::HasWithClause for ast::Delete {}
475
476impl ast::HasCreateTable for ast::CreateTable {}
477impl ast::HasCreateTable for ast::CreateForeignTable {}
478impl ast::HasCreateTable for ast::CreateTableLike {}
479
480#[test]
481fn index_expr() {
482    let source_code = "
483        select foo[bar];
484    ";
485    let parse = SourceFile::parse(source_code);
486    assert!(parse.errors().is_empty());
487    let file: SourceFile = parse.tree();
488    let stmt = file.stmts().next().unwrap();
489    let ast::Stmt::Select(select) = stmt else {
490        unreachable!()
491    };
492    let select_clause = select.select_clause().unwrap();
493    let target = select_clause
494        .target_list()
495        .unwrap()
496        .targets()
497        .next()
498        .unwrap();
499    let ast::Expr::IndexExpr(index_expr) = target.expr().unwrap() else {
500        unreachable!()
501    };
502    let base = index_expr.base().unwrap();
503    let index = index_expr.index().unwrap();
504    assert_eq!(base.syntax().text(), "foo");
505    assert_eq!(index.syntax().text(), "bar");
506}
507
508#[test]
509fn slice_expr() {
510    use insta::assert_snapshot;
511    let source_code = "
512        select x[1:2], x[2:], x[:3], x[:];
513    ";
514    let parse = SourceFile::parse(source_code);
515    assert!(parse.errors().is_empty());
516    let file: SourceFile = parse.tree();
517    let stmt = file.stmts().next().unwrap();
518    let ast::Stmt::Select(select) = stmt else {
519        unreachable!()
520    };
521    let select_clause = select.select_clause().unwrap();
522    let mut targets = select_clause.target_list().unwrap().targets();
523
524    let ast::Expr::SliceExpr(slice) = targets.next().unwrap().expr().unwrap() else {
525        unreachable!()
526    };
527    assert_snapshot!(slice.syntax(), @"x[1:2]");
528    assert_eq!(slice.base().unwrap().syntax().text(), "x");
529    assert_eq!(slice.start().unwrap().syntax().text(), "1");
530    assert_eq!(slice.end().unwrap().syntax().text(), "2");
531
532    let ast::Expr::SliceExpr(slice) = targets.next().unwrap().expr().unwrap() else {
533        unreachable!()
534    };
535    assert_snapshot!(slice.syntax(), @"x[2:]");
536    assert_eq!(slice.base().unwrap().syntax().text(), "x");
537    assert_eq!(slice.start().unwrap().syntax().text(), "2");
538    assert!(slice.end().is_none());
539
540    let ast::Expr::SliceExpr(slice) = targets.next().unwrap().expr().unwrap() else {
541        unreachable!()
542    };
543    assert_snapshot!(slice.syntax(), @"x[:3]");
544    assert_eq!(slice.base().unwrap().syntax().text(), "x");
545    assert!(slice.start().is_none());
546    assert_eq!(slice.end().unwrap().syntax().text(), "3");
547
548    let ast::Expr::SliceExpr(slice) = targets.next().unwrap().expr().unwrap() else {
549        unreachable!()
550    };
551    assert_snapshot!(slice.syntax(), @"x[:]");
552    assert_eq!(slice.base().unwrap().syntax().text(), "x");
553    assert!(slice.start().is_none());
554    assert!(slice.end().is_none());
555}
556
557#[test]
558fn field_expr() {
559    let source_code = "
560        select foo.bar;
561    ";
562    let parse = SourceFile::parse(source_code);
563    assert!(parse.errors().is_empty());
564    let file: SourceFile = parse.tree();
565    let stmt = file.stmts().next().unwrap();
566    let ast::Stmt::Select(select) = stmt else {
567        unreachable!()
568    };
569    let select_clause = select.select_clause().unwrap();
570    let target = select_clause
571        .target_list()
572        .unwrap()
573        .targets()
574        .next()
575        .unwrap();
576    let ast::Expr::FieldExpr(field_expr) = target.expr().unwrap() else {
577        unreachable!()
578    };
579    let base = field_expr.base().unwrap();
580    let field = field_expr.field().unwrap();
581    assert_eq!(base.syntax().text(), "foo");
582    assert_eq!(field.syntax().text(), "bar");
583}
584
585#[test]
586fn between_expr() {
587    let source_code = "
588        select 2 between 1 and 3;
589    ";
590    let parse = SourceFile::parse(source_code);
591    assert!(parse.errors().is_empty());
592    let file: SourceFile = parse.tree();
593    let stmt = file.stmts().next().unwrap();
594    let ast::Stmt::Select(select) = stmt else {
595        unreachable!()
596    };
597    let select_clause = select.select_clause().unwrap();
598    let target = select_clause
599        .target_list()
600        .unwrap()
601        .targets()
602        .next()
603        .unwrap();
604    let ast::Expr::BetweenExpr(between_expr) = target.expr().unwrap() else {
605        unreachable!()
606    };
607    let target = between_expr.target().unwrap();
608    let start = between_expr.start().unwrap();
609    let end = between_expr.end().unwrap();
610    assert_eq!(target.syntax().text(), "2");
611    assert_eq!(start.syntax().text(), "1");
612    assert_eq!(end.syntax().text(), "3");
613}
614
615#[test]
616fn cast_expr() {
617    use insta::assert_snapshot;
618
619    let cast = extract_expr("select cast('123' as int)");
620    assert!(cast.expr().is_some());
621    assert_snapshot!(cast.expr().unwrap().syntax(), @"'123'");
622    assert!(cast.ty().is_some());
623    assert_snapshot!(cast.ty().unwrap().syntax(), @"int");
624
625    let cast = extract_expr("select cast('123' as pg_catalog.int4)");
626    assert!(cast.expr().is_some());
627    assert_snapshot!(cast.expr().unwrap().syntax(), @"'123'");
628    assert!(cast.ty().is_some());
629    assert_snapshot!(cast.ty().unwrap().syntax(), @"pg_catalog.int4");
630
631    let cast = extract_expr("select int '123'");
632    assert!(cast.expr().is_some());
633    assert_snapshot!(cast.expr().unwrap().syntax(), @"'123'");
634    assert!(cast.ty().is_some());
635    assert_snapshot!(cast.ty().unwrap().syntax(), @"int");
636
637    let cast = extract_expr("select pg_catalog.int4 '123'");
638    assert!(cast.expr().is_some());
639    assert_snapshot!(cast.expr().unwrap().syntax(), @"'123'");
640    assert!(cast.ty().is_some());
641    assert_snapshot!(cast.ty().unwrap().syntax(), @"pg_catalog.int4");
642
643    let cast = extract_expr("select '123'::int");
644    assert!(cast.expr().is_some());
645    assert_snapshot!(cast.expr().unwrap().syntax(), @"'123'");
646    assert!(cast.ty().is_some());
647    assert_snapshot!(cast.ty().unwrap().syntax(), @"int");
648
649    let cast = extract_expr("select '123'::int4");
650    assert!(cast.expr().is_some());
651    assert_snapshot!(cast.expr().unwrap().syntax(), @"'123'");
652    assert!(cast.ty().is_some());
653    assert_snapshot!(cast.ty().unwrap().syntax(), @"int4");
654
655    let cast = extract_expr("select '123'::pg_catalog.int4");
656    assert!(cast.expr().is_some());
657    assert_snapshot!(cast.expr().unwrap().syntax(), @"'123'");
658    assert!(cast.ty().is_some());
659    assert_snapshot!(cast.ty().unwrap().syntax(), @"pg_catalog.int4");
660
661    let cast = extract_expr("select '{123}'::pg_catalog.varchar(10)[]");
662    assert!(cast.expr().is_some());
663    assert_snapshot!(cast.expr().unwrap().syntax(), @"'{123}'");
664    assert!(cast.ty().is_some());
665    assert_snapshot!(cast.ty().unwrap().syntax(), @"pg_catalog.varchar(10)[]");
666
667    let cast = extract_expr("select cast('{123}' as pg_catalog.varchar(10)[])");
668    assert!(cast.expr().is_some());
669    assert_snapshot!(cast.expr().unwrap().syntax(), @"'{123}'");
670    assert!(cast.ty().is_some());
671    assert_snapshot!(cast.ty().unwrap().syntax(), @"pg_catalog.varchar(10)[]");
672
673    let cast = extract_expr("select pg_catalog.varchar(10) '{123}'");
674    assert!(cast.expr().is_some());
675    assert_snapshot!(cast.expr().unwrap().syntax(), @"'{123}'");
676    assert!(cast.ty().is_some());
677    assert_snapshot!(cast.ty().unwrap().syntax(), @"pg_catalog.varchar(10)");
678
679    let cast = extract_expr("select interval '1' month");
680    assert!(cast.expr().is_some());
681    assert_snapshot!(cast.expr().unwrap().syntax(), @"'1'");
682    assert!(cast.ty().is_some());
683    assert_snapshot!(cast.ty().unwrap().syntax(), @"interval");
684
685    fn extract_expr(sql: &str) -> ast::CastExpr {
686        let parse = SourceFile::parse(sql);
687        assert!(parse.errors().is_empty());
688        let file: SourceFile = parse.tree();
689        let node = file
690            .stmts()
691            .map(|x| match x {
692                ast::Stmt::Select(select) => select
693                    .select_clause()
694                    .unwrap()
695                    .target_list()
696                    .unwrap()
697                    .targets()
698                    .next()
699                    .unwrap()
700                    .expr()
701                    .unwrap()
702                    .clone(),
703                _ => unreachable!(),
704            })
705            .next()
706            .unwrap();
707        match node {
708            ast::Expr::CastExpr(cast) => cast,
709            _ => unreachable!(),
710        }
711    }
712}
713
714#[test]
715fn op_sig() {
716    let source_code = "
717      alter operator p.+ (int4, int8) 
718        owner to u;
719    ";
720    let parse = SourceFile::parse(source_code);
721    assert!(parse.errors().is_empty());
722    let file: SourceFile = parse.tree();
723    let stmt = file.stmts().next().unwrap();
724    let ast::Stmt::AlterOperator(alter_op) = stmt else {
725        unreachable!()
726    };
727    let op_sig = alter_op.op_sig().unwrap();
728    let lhs = op_sig.lhs().unwrap();
729    let rhs = op_sig.rhs().unwrap();
730    assert_snapshot!(lhs.syntax().text(), @"int4");
731    assert_snapshot!(rhs.syntax().text(), @"int8");
732}
733
734#[test]
735fn cast_sig() {
736    let source_code = "
737      drop cast (text as int);
738    ";
739    let parse = SourceFile::parse(source_code);
740    assert!(parse.errors().is_empty());
741    let file: SourceFile = parse.tree();
742    let stmt = file.stmts().next().unwrap();
743    let ast::Stmt::DropCast(alter_op) = stmt else {
744        unreachable!()
745    };
746    let cast_sig = alter_op.cast_sig().unwrap();
747    let lhs = cast_sig.lhs().unwrap();
748    let rhs = cast_sig.rhs().unwrap();
749    assert_snapshot!(lhs.syntax().text(), @"text");
750    assert_snapshot!(rhs.syntax().text(), @"int");
751}
squawk_syntax/ast/node_ext.rs

squawk_syntax/ast/
node_ext.rs
