[Strings] stringview_*.slice (#4805)

Unfortunately one slice is the same as python [start:end], using 2 params,
and the other slice is one param, [CURR:CURR+num] (where CURR is implied
by the current state in the iter). So we can't use a single class here. Perhaps
a different name would be good, like slice vs substring (like JS does), but
I picked names to match the current spec.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/wasm-binary.h b/src/wasm-binary.h
index 9c5d6cd98..ba8d547d8 100644
--- a/src/wasm-binary.h
+++ b/src/wasm-binary.h
@@ -1149,12 +1149,15 @@ enum ASTNodes {
   StringIsUSV = 0x8a,
   StringAsWTF8 = 0x90,
   StringViewWTF8Advance = 0x91,
+  StringViewWTF8Slice = 0x93,
   StringAsWTF16 = 0x98,
   StringViewWTF16GetCodePoint = 0x9a,
+  StringViewWTF16Slice = 0x9c,
   StringAsIter = 0xa0,
   StringViewIterNext = 0xa1,
   StringViewIterAdvance = 0xa2,
   StringViewIterRewind = 0xa3,
+  StringViewIterSlice = 0xa4,
 };
 
 enum MemoryAccess {
@@ -1746,6 +1749,8 @@ public:
   bool maybeVisitStringWTF16Get(Expression*& out, uint32_t code);
   bool maybeVisitStringIterNext(Expression*& out, uint32_t code);
   bool maybeVisitStringIterMove(Expression*& out, uint32_t code);
+  bool maybeVisitStringSliceWTF(Expression*& out, uint32_t code);
+  bool maybeVisitStringSliceIter(Expression*& out, uint32_t code);
   void visitSelect(Select* curr, uint8_t code);
   void visitReturn(Return* curr);
   void visitMemorySize(MemorySize* curr);