[Parser] Parse br_table (#6098)

1 files changed, 14 insertions, 1 deletions

diff --git a/src/parser/parsers.h b/src/parser/parsers.h
index eb93fa717..0641e941c 100644
--- a/src/parser/parsers.h
+++ b/src/parser/parsers.h
@@ -1200,7 +1200,20 @@ template<typename Ctx> Result<> makeBreak(Ctx& ctx, Index pos) {
 }
 
 template<typename Ctx> Result<> makeBreakTable(Ctx& ctx, Index pos) {
-  return ctx.in.err("unimplemented instruction");
+  std::vector<typename Ctx::LabelIdxT> labels;
+  while (true) {
+    // Parse at least one label; return an error only if we parse none.
+    auto label = labelidx(ctx);
+    if (labels.empty()) {
+      CHECK_ERR(label);
+    } else if (label.getErr()) {
+      break;
+    }
+    labels.push_back(*label);
+  }
+  auto defaultLabel = labels.back();
+  labels.pop_back();
+  return ctx.makeSwitch(pos, labels, defaultLabel);
 }
 
 template<typename Ctx> Result<> makeReturn(Ctx& ctx, Index pos) {