index expr

src/grammar.ron

@@ -153,6 +153,7 @@ Grammar(
 
         // postfix
         "CALL_EXPR",
+        "INDEX_EXPR",
         "METHOD_CALL_EXPR",
         "FIELD_EXPR",
         "TRY_EXPR",

src/grammar/expressions/mod.rs

@@ -147,6 +147,7 @@ fn postfix_expr(p: &mut Parser, mut lhs: CompletedMarker) -> CompletedMarker {
     loop {
         lhs = match p.current() {
             L_PAREN => call_expr(p, lhs),
+            L_BRACK => index_expr(p, lhs),
             DOT if p.nth(1) == IDENT => if p.nth(2) == L_PAREN || p.nth(2) == COLONCOLON {
                 method_call_expr(p, lhs)
             } else {
@@ -172,6 +173,19 @@ fn call_expr(p: &mut Parser, lhs: CompletedMarker) -> CompletedMarker {
     m.complete(p, CALL_EXPR)
 }
 
+// test index_expr
+// fn foo() {
+//     x[1][2];
+// }
+fn index_expr(p: &mut Parser, lhs: CompletedMarker) -> CompletedMarker {
+    assert!(p.at(L_BRACK));
+    let m = lhs.precede(p);
+    p.bump();
+    expr(p);
+    p.expect(R_BRACK);
+    m.complete(p, INDEX_EXPR)
+}
+
 // test method_call_expr
 // fn foo() {
 //     x.foo();

src/syntax_kinds/generated.rs

@@ -141,6 +141,7 @@ pub enum SyntaxKind {
     STRUCT_LIT,
     STRUCT_LIT_FIELD,
     CALL_EXPR,
+    INDEX_EXPR,
     METHOD_CALL_EXPR,
     FIELD_EXPR,
     TRY_EXPR,
@@ -367,6 +368,7 @@ impl SyntaxKind {
             STRUCT_LIT => &SyntaxInfo { name: "STRUCT_LIT" },
             STRUCT_LIT_FIELD => &SyntaxInfo { name: "STRUCT_LIT_FIELD" },
             CALL_EXPR => &SyntaxInfo { name: "CALL_EXPR" },
+            INDEX_EXPR => &SyntaxInfo { name: "INDEX_EXPR" },
             METHOD_CALL_EXPR => &SyntaxInfo { name: "METHOD_CALL_EXPR" },
             FIELD_EXPR => &SyntaxInfo { name: "FIELD_EXPR" },
             TRY_EXPR => &SyntaxInfo { name: "TRY_EXPR" },

src/yellow/red.rs

@@ -71,7 +71,7 @@ impl RedNode {
         match &self.children.read()[idx] {
             Some(child) => return Some(child.into()),
             None => (),
-        }
+        };
         let green_children = self.green.children();
         let start_offset = self.start_offset()
             + green_children[..idx]