Remove FunctionType (#2510)

Function signatures were previously redundantly stored on Function
objects as well as on FunctionType objects. These two signature
representations had to always be kept in sync, which was error-prone
and needlessly complex. This PR takes advantage of the new ability of
Type to represent multiple value types by consolidating function
signatures as a pair of Types (params and results) stored on the
Function object.

Since there are no longer module-global named function types,
significant changes had to be made to the printing and emitting of
function types, as well as their parsing and manipulation in various
passes.

The C and JS APIs and their tests also had to be updated to remove
named function types.

1 files changed, 1 insertions, 2 deletions

diff --git a/test/binaryen.js/exception-handling.js b/test/binaryen.js/exception-handling.js
index 00faf8f26..5d84c1365 100644
--- a/test/binaryen.js/exception-handling.js
+++ b/test/binaryen.js/exception-handling.js
@@ -19,7 +19,6 @@ function stringify(expr) {
 var module = new Binaryen.Module();
 module.setFeatures(Binaryen.Features.ExceptionHandling);
 
-var v = module.addFunctionType("v", Binaryen.none, []);
 var event_ = module.addEvent("e", 0, Binaryen.i32, Binaryen.none);
 
 // (try
@@ -49,7 +48,7 @@ var try_ = module.try(
   ]
   )
 );
-var func = module.addFunction("test", v, [Binaryen.exnref], try_);
+var func = module.addFunction("test", Binaryen.none, Binaryen.none, [Binaryen.exnref], try_);
 
 console.log(module.emitText());
 assert(module.validate());