Initial multivalue support (#2675)

Implements parsing and emitting of tuple creation and extraction and tuple-typed control flow for both the text and binary formats.

TODO:
 - Extend Precompute/interpreter to handle tuple values
 - C and JS API support/testing
 - Figure out how to lower in stack IR
 - Fuzzing

1 files changed, 5 insertions, 0 deletions

diff --git a/src/support/small_vector.h b/src/support/small_vector.h
index d4ad961a7..ae2a9a3a7 100644
--- a/src/support/small_vector.h
+++ b/src/support/small_vector.h
@@ -41,6 +41,11 @@ public:
   using value_type = T;
 
   SmallVector() {}
+  SmallVector(std::initializer_list<T> init) {
+    for (T item : init) {
+      push_back(item);
+    }
+  }
 
   T& operator[](size_t i) {
     return const_cast<T&>(static_cast<const SmallVector<T, N>&>(*this)[i]);