feat: run existing ArrayList with imported C allocator

source/lexer/scan.hon

@@ -42,6 +42,8 @@ keywords strmap.StaticStringMap(TokenKind) :: strmap.init([
     { "or", .or },
     { "mut", .mut },
     { "struct", .struct },
+    { "c_struct", .c_struct },
+    { "opaque", .opaque },
     { "enum", .enum },
     { "union", .union },
     { "distinct", .distinct },
@@ -169,8 +171,9 @@ scan proc(
 
         if (char == '.' and cursor + 1 < program.len and program[cursor + 1] == '.') {
             inclusive :: cursor + 2 < program.len and program[cursor + 2] == '='
-            width :: if (inclusive) 3 else 2
-            range_kind :: if (inclusive) .range_inclusive else .range
+            variadic :: cursor + 2 < program.len and program[cursor + 2] == '.'
+            width :: if (inclusive or variadic) 3 else 2
+            range_kind :: if (inclusive) .range_inclusive else if (variadic) .ellipsis else .range
             try add_token(state, Token{
                 span = make_span(source, cursor, cursor + width),
                 kind = range_kind,

source/lexer/scan.test.hon

@@ -150,10 +150,10 @@ scans_ranges_without_consuming_float_dots test {
     state := init(mem.c_allocator)
     defer deinit(&state)
     try scan(&state, "0..10 0..=10 1.5..2.5 |@item, _| ... 1.", &pool, &diagnostic_store)
-    expected [19]TokenKind :: [
+    expected [18]TokenKind :: [
         .int, .range, .int, .int, .range_inclusive, .int,
         .float, .range, .float, .pipe, .at, .ident, .comma, .ident, .pipe,
-        .range, .dot, .invalid, .eof,
+        .ellipsis, .invalid, .eof,
     ]
     try testing.expect_equal(expected.len, state.tokens.items.len)
     for (expected) |kind, index| try testing.expect_equal(kind, state.tokens.items[index].kind)

source/lexer/token.hon

@@ -28,7 +28,9 @@ TokenKind :: enum {
     defer, errdefer
     true, false
     and, or
-    struct, enum, union
+    struct, c_struct
+    opaque
+    enum, union
     distinct, alias
     import, test
     mut
@@ -53,7 +55,7 @@ TokenKind :: enum {
     plus, minus
     star, slash
 
-    range, range_inclusive
+    range, range_inclusive, ellipsis
     at, ampersand, caret, dollar
     question, semicolon
     pipe