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, 5 insertions, 5 deletions

diff --git a/test/newsyntax.wast.fromBinary b/test/newsyntax.wast.fromBinary
index 3def8819d..27e8679ab 100644
--- a/test/newsyntax.wast.fromBinary
+++ b/test/newsyntax.wast.fromBinary
@@ -1,17 +1,17 @@
 (module
- (type $0 (func))
- (type $1 (func (param i32 f64) (result i32)))
+ (type $none_=>_none (func))
+ (type $i32_f64_=>_i32 (func (param i32 f64) (result i32)))
  (import "env" "table" (table $timport$0 9 9 funcref))
  (export "call_indirect" (func $0))
- (func $0 (; 0 ;) (type $0)
+ (func $0 (; 0 ;)
   (drop
-   (call_indirect (type $1)
+   (call_indirect (type $i32_f64_=>_i32)
     (i32.const 10)
     (f64.const 20)
     (i32.const 30)
    )
   )
-  (call_indirect (type $0)
+  (call_indirect (type $none_=>_none)
    (i32.const 1)
   )
  )