;; Test `func` declarations, i.e. functions

(module
  ;; Auxiliary definition
  (type $sig (func))
  (func $dummy)

  ;; Syntax

  (func)
  (func (export "f"))
  (func $f)
  (func $h (export "g"))

  (func (local))
  (func (local) (local))
  (func (local i32))
  (func (local $x i32))
  (func (local i32 f64 i64))
  (func (local i32) (local f64))
  (func (local i32 f32) (local $x i64) (local) (local i32 f64))

  (func (param))
  (func (param) (param))
  (func (param i32))
  (func (param $x i32))
  (func (param i32 f64 i64))
  (func (param i32) (param f64))
  (func (param i32 f32) (param $x i64) (param) (param i32 f64))

  (func (result i32) (unreachable))

  (type $sig-1 (func))
  (type $sig-2 (func (result i32)))
  (type $sig-3 (func (param $x i32)))
  (type $sig-4 (func (param i32 f64 i32) (result i32)))

  (func (export "type-use-1") (type $sig-1))
  (func (export "type-use-2") (type $sig-2) (i32.const 0))
  (func (export "type-use-3") (type $sig-3))
  (func (export "type-use-4") (type $sig-4) (i32.const 0))
  (func (export "type-use-5") (type $sig-2) (result i32) (i32.const 0))
  (func (export "type-use-6") (type $sig-3) (param i32))
  (func (export "type-use-7")
    (type $sig-4) (param i32) (param f64 i32) (result i32) (i32.const 0)
  )

  (func (type $sig))
  (func (type $forward))  ;; forward reference

  (func $complex
    (param i32 f32) (param $x i64) (param) (param i32)
    (result) (result i32) (result)
    (local f32) (local $y i32) (local i64 i32) (local) (local f64 i32)
    (unreachable) (unreachable)
  )
  (func $complex-sig
    (type $sig)
    (local f32) (local $y i32) (local i64 i32) (local) (local f64 i32)
    (unreachable) (unreachable)
  )

  (type $forward (func))

  ;; Typing of locals

  (func (export "local-first-i32") (result i32) (local i32 i32) (get_local 0))
  (func (export "local-first-i64") (result i64) (local i64 i64) (get_local 0))
  (func (export "local-first-f32") (result f32) (local f32 f32) (get_local 0))
  (func (export "local-first-f64") (result f64) (local f64 f64) (get_local 0))
  (func (export "local-second-i32") (result i32) (local i32 i32) (get_local 1))
  (func (export "local-second-i64") (result i64) (local i64 i64) (get_local 1))
  (func (export "local-second-f32") (result f32) (local f32 f32) (get_local 1))
  (func (export "local-second-f64") (result f64) (local f64 f64) (get_local 1))
  (func (export "local-mixed") (result f64)
    (local f32) (local $x i32) (local i64 i32) (local) (local f64 i32)
    (drop (f32.neg (get_local 0)))
    (drop (i32.eqz (get_local 1)))
    (drop (i64.eqz (get_local 2)))
    (drop (i32.eqz (get_local 3)))
    (drop (f64.neg (get_local 4)))
    (drop (i32.eqz (get_local 5)))
    (get_local 4)
  )

  ;; Typing of parameters

  (func (export "param-first-i32") (param i32 i32) (result i32) (get_local 0))
  (func (export "param-first-i64") (param i64 i64) (result i64) (get_local 0))
  (func (export "param-first-f32") (param f32 f32) (result f32) (get_local 0))
  (func (export "param-first-f64") (param f64 f64) (result f64) (get_local 0))
  (func (export "param-second-i32") (param i32 i32) (result i32) (get_local 1))
  (func (export "param-second-i64") (param i64 i64) (result i64) (get_local 1))
  (func (export "param-second-f32") (param f32 f32) (result f32) (get_local 1))
  (func (export "param-second-f64") (param f64 f64) (result f64) (get_local 1))
  (func (export "param-mixed") (param f32 i32) (param) (param $x i64) (param i32 f64 i32)
    (result f64)
    (drop (f32.neg (get_local 0)))
    (drop (i32.eqz (get_local 1)))
    (drop (i64.eqz (get_local 2)))
    (drop (i32.eqz (get_local 3)))
    (drop (f64.neg (get_local 4)))
    (drop (i32.eqz (get_local 5)))
    (get_local 4)
  )

  ;; Typing of result

  (func (export "empty"))
  (func (export "value-void") (call $dummy))
  (func (export "value-i32") (result i32) (i32.const 77))
  (func (export "value-i64") (result i64) (i64.const 7777))
  (func (export "value-f32") (result f32) (f32.const 77.7))
  (func (export "value-f64") (result f64) (f64.const 77.77))
  (func (export "value-block-void") (block (call $dummy) (call $dummy)))
  (func (export "value-block-i32") (result i32)
    (block (result i32) (call $dummy) (i32.const 77))
  )

  (func (export "return-empty") (return))
  (func (export "return-i32") (result i32) (return (i32.const 78)))
  (func (export "return-i64") (result i64) (return (i64.const 7878)))
  (func (export "return-f32") (result f32) (return (f32.const 78.7)))
  (func (export "return-f64") (result f64) (return (f64.const 78.78)))
  (func (export "return-block-i32") (result i32)
    (return (block (result i32) (call $dummy) (i32.const 77)))
  )

  (func (export "break-empty") (br 0))
  (func (export "break-i32") (result i32) (br 0 (i32.const 79)))
  (func (export "break-i64") (result i64) (br 0 (i64.const 7979)))
  (func (export "break-f32") (result f32) (br 0 (f32.const 79.9)))
  (func (export "break-f64") (result f64) (br 0 (f64.const 79.79)))
  (func (export "break-block-i32") (result i32)
    (br 0 (block (result i32) (call $dummy) (i32.const 77)))
  )

  (func (export "break-br_if-empty") (param i32)
    (br_if 0 (get_local 0))
  )
  (func (export "break-br_if-num") (param i32) (result i32)
    (drop (br_if 0 (i32.const 50) (get_local 0))) (i32.const 51)
  )

  (func (export "break-br_table-empty") (param i32)
    (br_table 0 0 0 (get_local 0))
  )
  (func (export "break-br_table-num") (param i32) (result i32)
    (br_table 0 0 (i32.const 50) (get_local 0)) (i32.const 51)
  )
  (func (export "break-br_table-nested-empty") (param i32)
    (block (br_table 0 1 0 (get_local 0)))
  )
  (func (export "break-br_table-nested-num") (param i32) (result i32)
    (i32.add
      (block (result i32)
        (br_table 0 1 0 (i32.const 50) (get_local 0)) (i32.const 51)
      )
      (i32.const 2)
    )
  )

  ;; Default initialization of locals

  (func (export "init-local-i32") (result i32) (local i32) (get_local 0))
  (func (export "init-local-i64") (result i64) (local i64) (get_local 0))
  (func (export "init-local-f32") (result f32) (local f32) (get_local 0))
  (func (export "init-local-f64") (result f64) (local f64) (get_local 0))
)

(assert_return (invoke "type-use-1"))
(assert_return (invoke "type-use-2") (i32.const 0))
(assert_return (invoke "type-use-3" (i32.const 1)))
(assert_return
  (invoke "type-use-4" (i32.const 1) (f64.const 1) (i32.const 1))
  (i32.const 0)
)
(assert_return (invoke "type-use-5") (i32.const 0))
(assert_return (invoke "type-use-6" (i32.const 1)))
(assert_return
  (invoke "type-use-7" (i32.const 1) (f64.const 1) (i32.const 1))
  (i32.const 0)
)

(assert_return (invoke "local-first-i32") (i32.const 0))
(assert_return (invoke "local-first-i64") (i64.const 0))
(assert_return (invoke "local-first-f32") (f32.const 0))
(assert_return (invoke "local-first-f64") (f64.const 0))
(assert_return (invoke "local-second-i32") (i32.const 0))
(assert_return (invoke "local-second-i64") (i64.const 0))
(assert_return (invoke "local-second-f32") (f32.const 0))
(assert_return (invoke "local-second-f64") (f64.const 0))
(assert_return (invoke "local-mixed") (f64.const 0))

(assert_return
  (invoke "param-first-i32" (i32.const 2) (i32.const 3)) (i32.const 2)
)
(assert_return
  (invoke "param-first-i64" (i64.const 2) (i64.const 3)) (i64.const 2)
)
(assert_return
  (invoke "param-first-f32" (f32.const 2) (f32.const 3)) (f32.const 2)
)
(assert_return
  (invoke "param-first-f64" (f64.const 2) (f64.const 3)) (f64.const 2)
)
(assert_return
  (invoke "param-second-i32" (i32.const 2) (i32.const 3)) (i32.const 3)
)
(assert_return
  (invoke "param-second-i64" (i64.const 2) (i64.const 3)) (i64.const 3)
)
(assert_return
  (invoke "param-second-f32" (f32.const 2) (f32.const 3)) (f32.const 3)
)
(assert_return
  (invoke "param-second-f64" (f64.const 2) (f64.const 3)) (f64.const 3)
)

(assert_return
  (invoke "param-mixed"
    (f32.const 1) (i32.const 2) (i64.const 3)
    (i32.const 4) (f64.const 5.5) (i32.const 6)
  )
  (f64.const 5.5)
)

(assert_return (invoke "empty"))
(assert_return (invoke "value-void"))
(assert_return (invoke "value-i32") (i32.const 77))
(assert_return (invoke "value-i64") (i64.const 7777))
(assert_return (invoke "value-f32") (f32.const 77.7))
(assert_return (invoke "value-f64") (f64.const 77.77))
(assert_return (invoke "value-block-void"))
(assert_return (invoke "value-block-i32") (i32.const 77))

(assert_return (invoke "return-empty"))
(assert_return (invoke "return-i32") (i32.const 78))
(assert_return (invoke "return-i64") (i64.const 7878))
(assert_return (invoke "return-f32") (f32.const 78.7))
(assert_return (invoke "return-f64") (f64.const 78.78))
(assert_return (invoke "return-block-i32") (i32.const 77))

(assert_return (invoke "break-empty"))
(assert_return (invoke "break-i32") (i32.const 79))
(assert_return (invoke "break-i64") (i64.const 7979))
(assert_return (invoke "break-f32") (f32.const 79.9))
(assert_return (invoke "break-f64") (f64.const 79.79))
(assert_return (invoke "break-block-i32") (i32.const 77))

(assert_return (invoke "break-br_if-empty" (i32.const 0)))
(assert_return (invoke "break-br_if-empty" (i32.const 2)))
(assert_return (invoke "break-br_if-num" (i32.const 0)) (i32.const 51))
(assert_return (invoke "break-br_if-num" (i32.const 1)) (i32.const 50))

(assert_return (invoke "break-br_table-empty" (i32.const 0)))
(assert_return (invoke "break-br_table-empty" (i32.const 1)))
(assert_return (invoke "break-br_table-empty" (i32.const 5)))
(assert_return (invoke "break-br_table-empty" (i32.const -1)))
(assert_return (invoke "break-br_table-num" (i32.const 0)) (i32.const 50))
(assert_return (invoke "break-br_table-num" (i32.const 1)) (i32.const 50))
(assert_return (invoke "break-br_table-num" (i32.const 10)) (i32.const 50))
(assert_return (invoke "break-br_table-num" (i32.const -100)) (i32.const 50))
(assert_return (invoke "break-br_table-nested-empty" (i32.const 0)))
(assert_return (invoke "break-br_table-nested-empty" (i32.const 1)))
(assert_return (invoke "break-br_table-nested-empty" (i32.const 3)))
(assert_return (invoke "break-br_table-nested-empty" (i32.const -2)))
(assert_return
  (invoke "break-br_table-nested-num" (i32.const 0)) (i32.const 52)
)
(assert_return
  (invoke "break-br_table-nested-num" (i32.const 1)) (i32.const 50)
)
(assert_return
  (invoke "break-br_table-nested-num" (i32.const 2)) (i32.const 52)
)
(assert_return
  (invoke "break-br_table-nested-num" (i32.const -3)) (i32.const 52)
)

(assert_return (invoke "init-local-i32") (i32.const 0))
(assert_return (invoke "init-local-i64") (i64.const 0))
(assert_return (invoke "init-local-f32") (f32.const 0))
(assert_return (invoke "init-local-f64") (f64.const 0))


;; Expansion of inline function types

(module
  (func $f (result f64) (f64.const 0))  ;; adds implicit type definition
  (func $g (param i32))                 ;; reuses explicit type definition
  (type $t (func (param i32)))

  (func $i32->void (type 0))                ;; (param i32)
  (func $void->f64 (type 1) (f64.const 0))  ;; (result f64)
  (func $check
    (call $i32->void (i32.const 0))
    (drop (call $void->f64))
  )
)

(assert_invalid
  (module
    (func $f (result f64) (f64.const 0))  ;; adds implicit type definition
    (func $g (param i32))                 ;; reuses explicit type definition
    (func $h (result f64) (f64.const 1))  ;; reuses implicit type definition
    (type $t (func (param i32)))

    (func (type 2))  ;; does not exist
  )
  "unknown type"
)


(module
  (type $sig (func))

  (func $empty-sig-1)  ;; should be assigned type $sig
  (func $complex-sig-1 (param f64 i64 f64 i64 f64 i64 f32 i32))
  (func $empty-sig-2)  ;; should be assigned type $sig
  (func $complex-sig-2 (param f64 i64 f64 i64 f64 i64 f32 i32))
  (func $complex-sig-3 (param f64 i64 f64 i64 f64 i64 f32 i32))
  (func $complex-sig-4 (param i64 i64 f64 i64 f64 i64 f32 i32))
  (func $complex-sig-5 (param i64 i64 f64 i64 f64 i64 f32 i32))

  (type $empty-sig-duplicate (func))
  (type $complex-sig-duplicate (func (param i64 i64 f64 i64 f64 i64 f32 i32)))
  (table anyfunc
    (elem
      $complex-sig-3 $empty-sig-2 $complex-sig-1 $complex-sig-3 $empty-sig-1
      $complex-sig-4 $complex-sig-5
    )
  )

  (func (export "signature-explicit-reused")
    (call_indirect (type $sig) (i32.const 1))
    (call_indirect (type $sig) (i32.const 4))
  )

  (func (export "signature-implicit-reused")
    ;; The implicit index 3 in this test depends on the function and
    ;; type definitions, and may need adapting if they change.
    (call_indirect (type 3)
      (f64.const 0) (i64.const 0) (f64.const 0) (i64.const 0)
      (f64.const 0) (i64.const 0) (f32.const 0) (i32.const 0)
      (i32.const 0)
    )
    (call_indirect (type 3)
      (f64.const 0) (i64.const 0) (f64.const 0) (i64.const 0)
      (f64.const 0) (i64.const 0) (f32.const 0) (i32.const 0)
      (i32.const 2)
    )
    (call_indirect (type 3)
      (f64.const 0) (i64.const 0) (f64.const 0) (i64.const 0)
      (f64.const 0) (i64.const 0) (f32.const 0) (i32.const 0)
      (i32.const 3)
    )
  )

  (func (export "signature-explicit-duplicate")
    (call_indirect (type $empty-sig-duplicate) (i32.const 1))
  )

  (func (export "signature-implicit-duplicate")
    (call_indirect (type $complex-sig-duplicate)
      (i64.const 0) (i64.const 0) (f64.const 0) (i64.const 0)
      (f64.const 0) (i64.const 0) (f32.const 0) (i32.const 0)
      (i32.const 5)
    )
    (call_indirect (type $complex-sig-duplicate)
      (i64.const 0) (i64.const 0) (f64.const 0) (i64.const 0)
      (f64.const 0) (i64.const 0) (f32.const 0) (i32.const 0)
      (i32.const 6)
    )
  )
)

(assert_return (invoke "signature-explicit-reused"))
(assert_return (invoke "signature-implicit-reused"))
(assert_return (invoke "signature-explicit-duplicate"))
(assert_return (invoke "signature-implicit-duplicate"))


;; Malformed type use

(assert_malformed
  (module quote
    "(type $sig (func (param i32) (result i32)))"
    "(func (type $sig) (result i32) (param i32) (i32.const 0))"
  )
  "unexpected token"
)
(assert_malformed
  (module quote
    "(type $sig (func (param i32) (result i32)))"
    "(func (param i32) (type $sig) (result i32) (i32.const 0))"
  )
  "unexpected token"
)
(assert_malformed
  (module quote
    "(type $sig (func (param i32) (result i32)))"
    "(func (param i32) (result i32) (type $sig) (i32.const 0))"
  )
  "unexpected token"
)
(assert_malformed
  (module quote
    "(type $sig (func (param i32) (result i32)))"
    "(func (result i32) (type $sig) (param i32) (i32.const 0))"
  )
  "unexpected token"
)
(assert_malformed
  (module quote
    "(type $sig (func (param i32) (result i32)))"
    "(func (result i32) (param i32) (type $sig) (i32.const 0))"
  )
  "unexpected token"
)
(assert_malformed
  (module quote
    "(func (result i32) (param i32) (i32.const 0))"
  )
  "unexpected token"
)

(assert_malformed
  (module quote
    "(type $sig (func))"
    "(func (type $sig) (result i32) (i32.const 0))"
  )
  "inline function type"
)
(assert_malformed
  (module quote
    "(type $sig (func (param i32) (result i32)))"
    "(func (type $sig) (result i32) (i32.const 0))"
  )
  "inline function type"
)
(assert_malformed
  (module quote
    "(type $sig (func (param i32) (result i32)))"
    "(func (type $sig) (param i32) (i32.const 0))"
  )
  "inline function type"
)
(assert_malformed
  (module quote
    "(type $sig (func (param i32 i32) (result i32)))"
    "(func (type $sig) (param i32) (result i32) (unreachable))"
  )
  "inline function type"
)


;; Invalid typing of locals

(assert_invalid
  (module (func $type-local-num-vs-num (result i64) (local i32) (get_local 0)))
  "type mismatch"
)
(assert_invalid
  (module (func $type-local-num-vs-num (local f32) (i32.eqz (get_local 0))))
  "type mismatch"
)
(assert_invalid
  (module (func $type-local-num-vs-num (local f64 i64) (f64.neg (get_local 1))))
  "type mismatch"
)


;; Invalid typing of parameters

(assert_invalid
  (module (func $type-param-num-vs-num (param i32) (result i64) (get_local 0)))
  "type mismatch"
)
(assert_invalid
  (module (func $type-param-num-vs-num (param f32) (i32.eqz (get_local 0))))
  "type mismatch"
)
(assert_invalid
  (module (func $type-param-num-vs-num (param f64 i64) (f64.neg (get_local 1))))
  "type mismatch"
)


;; Invalid typing of result

(assert_invalid
  (module (func $type-multiple-result (result i32 i32) (unreachable)))
  "invalid result arity"
)
(assert_invalid
  (module
    (type (func (result i32 i32)))
    (func $type-multiple-result (type 0) (unreachable))
  )
  "invalid result arity"
)


(assert_invalid
  (module (func $type-empty-i32 (result i32)))
  "type mismatch"
)
(assert_invalid
  (module (func $type-empty-i64 (result i64)))
  "type mismatch"
)
(assert_invalid
  (module (func $type-empty-f32 (result f32)))
  "type mismatch"
)
(assert_invalid
  (module (func $type-empty-f64 (result f64)))
  "type mismatch"
)

(assert_invalid
  (module (func $type-value-void-vs-num (result i32)
    (nop)
  ))
  "type mismatch"
)
(assert_invalid
  (module (func $type-value-num-vs-void
    (i32.const 0)
  ))
  "type mismatch"
)
(assert_invalid
  (module (func $type-value-num-vs-num (result i32)
    (f32.const 0)
  ))
  "type mismatch"
)

(assert_invalid
  (module (func $type-return-last-empty-vs-num (result i32)
    (return)
  ))
  "type mismatch"
)
(assert_invalid
  (module (func $type-return-last-void-vs-num (result i32)
    (return (nop))
  ))
  "type mismatch"
)
(assert_invalid
  (module (func $type-return-last-num-vs-num (result i32)
    (return (i64.const 0))
  ))
  "type mismatch"
)

(assert_invalid
  (module (func $type-return-empty-vs-num (result i32)
    (return) (i32.const 1)
  ))
  "type mismatch"
)
(assert_invalid
  (module (func $type-return-void-vs-num (result i32)
    (return (nop)) (i32.const 1)
  ))
  "type mismatch"
)
(assert_invalid
  (module (func $type-return-num-vs-num (result i32)
    (return (i64.const 1)) (i32.const 1)
  ))
  "type mismatch"
)
(assert_invalid
  (module (func $type-return-first-num-vs-num (result i32)
    (return (i64.const 1)) (return (i32.const 1))
  ))
  "type mismatch"
)

(assert_invalid
  (module (func $type-break-last-void-vs-num (result i32)
    (br 0)
  ))
  "type mismatch"
)
(assert_invalid
  (module (func $type-break-last-num-vs-num (result i32)
    (br 0 (f32.const 0))
  ))
  "type mismatch"
)
(assert_invalid
  (module (func $type-break-void-vs-num (result i32)
    (br 0) (i32.const 1)
  ))
  "type mismatch"
)
(assert_invalid
  (module (func $type-break-num-vs-num (result i32)
    (br 0 (i64.const 1)) (i32.const 1)
  ))
  "type mismatch"
)
(assert_invalid
  (module (func $type-break-first-num-vs-num (result i32)
    (br 0 (i64.const 1)) (br 0 (i32.const 1))
  ))
  "type mismatch"
)

(assert_invalid
  (module (func $type-break-nested-empty-vs-num (result i32)
    (block (br 1)) (br 0 (i32.const 1))
  ))
  "type mismatch"
)
(assert_invalid
  (module (func $type-break-nested-void-vs-num (result i32)
    (block (br 1 (nop))) (br 0 (i32.const 1))
  ))
  "type mismatch"
)
(assert_invalid
  (module (func $type-break-nested-num-vs-num (result i32)
    (block (br 1 (i64.const 1))) (br 0 (i32.const 1))
  ))
  "type mismatch"
)


;; Syntax errors

(assert_malformed
  (module quote "(func (nop) (local i32))")
  "unexpected token"
)
(assert_malformed
  (module quote "(func (nop) (param i32))")
  "unexpected token"
)
(assert_malformed
  (module quote "(func (nop) (result i32))")
  "unexpected token"
)
(assert_malformed
  (module quote "(func (local i32) (param i32))")
  "unexpected token"
)
(assert_malformed
  (module quote "(func (local i32) (result i32) (get_local 0))")
  "unexpected token"
)
(assert_malformed
  (module quote "(func (result i32) (param i32) (get_local 0))")
  "unexpected token"
)