feat(biome_css_parser): parser should recognize multiple semicolons a…

…fter a declaration

crates/biome_css_parser/src/syntax/block/declaration_or_rule_list_block.rs

@@ -10,8 +10,8 @@ use biome_css_syntax::CssSyntaxKind::*;
 use biome_css_syntax::{CssSyntaxKind, T};
 use biome_parser::parse_lists::ParseNodeList;
 use biome_parser::parse_recovery::{ParseRecovery, RecoveryResult};
-use biome_parser::parsed_syntax::ParsedSyntax;
-use biome_parser::parsed_syntax::ParsedSyntax::Absent;
+use biome_parser::prelude::ParsedSyntax;
+use biome_parser::prelude::ParsedSyntax::{Absent, Present};
 use biome_parser::{CompletedMarker, Parser};
 
 #[inline]
@@ -88,6 +88,10 @@ impl ParseNodeList for DeclarationOrRuleList {
                 // If either condition is true, the declaration is considered valid.
                 if matches!(p.last(), Some(T![;])) || p.at(T!['}']) {
                     Ok(declaration)
+                } 
+                let marker = p.start();
+                if p.eat(T![;]) {
+                    Ok(Present(marker.complete(p, CSS_EMPTY_DECLARATION)))
                 } else {
                     // If neither condition is met, return an error to indicate parsing failure.
                     // And rewind the parser to the start of the declaration.

crates/biome_css_parser/tests/css_test_suite/ok/declaration_list.css

@@ -31,6 +31,15 @@ a {
     prop1: --custom;
 }
 
+a {
+    prop1: 1px;
+    prop2: 2px;;;
+}
+
+a {
+    prop1: 1px;;;
+}
+
 div {
 	flex: 1 1 auto !important;
 }

crates/biome_css_parser/tests/spec_test.rs

@@ -174,7 +174,10 @@ pub fn run(test_case: &str, _snapshot_name: &str, test_directory: &str, outcome_
 #[test]
 pub fn quick_test() {
     let code = r#"
-µ... {}
+    .foo {
+       color: red;
+       color: blue;;
+    }
     "#;
 
     let root = parse_css(

xtask/codegen/css.ungram

@@ -475,6 +475,9 @@ CssDeclarationWithSemicolon =
     declaration: CssDeclaration
     ';'?
 
+CssEmptyDeclaration =
+    ';'
+
 AnyCssDeclarationBlock =
 	CssDeclarationBlock
 	| CssBogusBlock

xtask/codegen/src/css_kinds_src.rs

@@ -288,6 +288,7 @@ pub const CSS_KINDS_SRC: KindsSrc = KindsSrc {
         "CSS_DECLARATION_OR_AT_RULE_LIST",
         "CSS_DECLARATION_WITH_SEMICOLON",
         "CSS_DECLARATION",
+        "CSS_EMPTY_DECLARATION",
         "CSS_IDENTIFIER",
         "CSS_NUMBER",
         "CSS_PARAMETER",