Use associated types instead of type parameters inside the BuilderMethods trait

This commit is contained in:
Denis Merigoux 2018-08-22 18:57:31 +02:00 committed by Eduard-Mihai Burtescu
parent 9c41e1aa10
commit 89825f2ef5
4 changed files with 355 additions and 361 deletions

View file

@ -9,7 +9,6 @@
// except according to those terms.
use common::*;
use type_::Type;
use libc::c_char;
use rustc::ty::TyCtxt;
use rustc::ty::layout::{Align, Size};
@ -103,265 +102,265 @@ pub enum SynchronizationScope {
}
pub trait BuilderMethods<'a, 'll :'a, 'tcx: 'll,
Value : ?Sized,
BasicBlock: ?Sized
> {
pub trait BuilderMethods<'a, 'll :'a, 'tcx: 'll> {
type Value;
type BasicBlock;
type Type;
fn new_block<'b>(
cx: &'a CodegenCx<'ll, 'tcx>,
llfn: &'ll Value,
cx: &'a CodegenCx<'ll, 'tcx, Self::Value>,
llfn: Self::Value,
name: &'b str
) -> Self;
fn with_cx(cx: &'a CodegenCx<'ll, 'tcx>) -> Self;
fn with_cx(cx: &'a CodegenCx<'ll, 'tcx, Self::Value>) -> Self;
fn build_sibling_block<'b>(&self, name: &'b str) -> Self;
fn sess(&self) -> &Session;
fn cx(&self) -> &'a CodegenCx<'ll, 'tcx>;
fn cx(&self) -> &'a CodegenCx<'ll, 'tcx, Self::Value>;
fn tcx(&self) -> TyCtxt<'a, 'tcx, 'tcx>;
fn llfn(&self) -> &'ll Value;
fn llbb(&self) -> &'ll BasicBlock;
fn llfn(&self) -> Self::Value;
fn llbb(&self) -> Self::BasicBlock;
fn count_insn(&self, category: &str);
fn set_value_name(&self, value: &'ll Value, name: &str);
fn position_at_end(&self, llbb: &'ll BasicBlock);
fn position_at_start(&self, llbb: &'ll BasicBlock);
fn set_value_name(&self, value: Self::Value, name: &str);
fn position_at_end(&self, llbb: Self::BasicBlock);
fn position_at_start(&self, llbb: Self::BasicBlock);
fn ret_void(&self);
fn ret(&self, v: &'ll Value);
fn br(&self, dest: &'ll BasicBlock);
fn ret(&self, v: Self::Value);
fn br(&self, dest: Self::BasicBlock);
fn cond_br(
&self,
cond: &'ll Value,
then_llbb: &'ll BasicBlock,
else_llbb: &'ll BasicBlock,
cond: Self::Value,
then_llbb: Self::BasicBlock,
else_llbb: Self::BasicBlock,
);
fn switch(
&self,
v: &'ll Value,
else_llbb: &'ll BasicBlock,
v: Self::Value,
else_llbb: Self::BasicBlock,
num_cases: usize,
) -> &'ll Value;
) -> Self::Value;
fn invoke(
&self,
llfn: &'ll Value,
args: &[&'ll Value],
then: &'ll BasicBlock,
catch: &'ll BasicBlock,
bundle: Option<&OperandBundleDef<'ll, &'ll Value>>
) -> &'ll Value;
llfn: Self::Value,
args: &[Self::Value],
then: Self::BasicBlock,
catch: Self::BasicBlock,
bundle: Option<&OperandBundleDef<'ll, Self::Value>>
) -> Self::Value;
fn unreachable(&self);
fn add(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn fadd(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn fadd_fast(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn sub(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn fsub(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn fsub_fast(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn mul(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn fmul(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn fmul_fast(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn udiv(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn exactudiv(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn sdiv(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn exactsdiv(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn fdiv(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn fdiv_fast(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn urem(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn srem(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn frem(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn frem_fast(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn shl(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn lshr(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn ashr(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn and(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn or(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn xor(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn neg(&self, v: &'ll Value) -> &'ll Value;
fn fneg(&self, v: &'ll Value) -> &'ll Value;
fn not(&self, v: &'ll Value) -> &'ll Value;
fn add(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn fadd(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn fadd_fast(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn sub(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn fsub(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn fsub_fast(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn mul(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn fmul(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn fmul_fast(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn udiv(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn exactudiv(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn sdiv(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn exactsdiv(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn fdiv(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn fdiv_fast(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn urem(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn srem(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn frem(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn frem_fast(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn shl(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn lshr(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn ashr(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn and(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn or(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn xor(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn neg(&self, v: Self::Value) -> Self::Value;
fn fneg(&self, v: Self::Value) -> Self::Value;
fn not(&self, v: Self::Value) -> Self::Value;
fn alloca(&self, ty: &'ll Type, name: &str, align: Align) -> &'ll Value;
fn dynamic_alloca(&self, ty: &'ll Type, name: &str, align: Align) -> &'ll Value;
fn alloca(&self, ty: Self::Type, name: &str, align: Align) -> Self::Value;
fn dynamic_alloca(&self, ty: Self::Type, name: &str, align: Align) -> Self::Value;
fn array_alloca(
&self,
ty: &'ll Type,
len: &'ll Value,
ty: Self::Type,
len: Self::Value,
name: &str,
align: Align
) -> &'ll Value;
) -> Self::Value;
fn load(&self, ptr: &'ll Value, align: Align) -> &'ll Value;
fn volatile_load(&self, ptr: &'ll Value) -> &'ll Value;
fn atomic_load(&self, ptr: &'ll Value, order: AtomicOrdering, size: Size) -> &'ll Value;
fn load(&self, ptr: Self::Value, align: Align) -> Self::Value;
fn volatile_load(&self, ptr: Self::Value) -> Self::Value;
fn atomic_load(&self, ptr: Self::Value, order: AtomicOrdering, size: Size) -> Self::Value;
fn range_metadata(&self, load: &'ll Value, range: Range<u128>);
fn nonnull_metadata(&self, load: &'ll Value);
fn range_metadata(&self, load: Self::Value, range: Range<u128>);
fn nonnull_metadata(&self, load: Self::Value);
fn store(&self, val: &'ll Value, ptr: &'ll Value, align: Align) -> &'ll Value;
fn store(&self, val: Self::Value, ptr: Self::Value, align: Align) -> Self::Value;
fn store_with_flags(
&self,
val: &'ll Value,
ptr: &'ll Value,
val: Self::Value,
ptr: Self::Value,
align: Align,
flags: MemFlags,
) -> &'ll Value;
) -> Self::Value;
fn atomic_store(
&self,
val: &'ll Value,
ptr: &'ll Value,
val: Self::Value,
ptr: Self::Value,
order: AtomicOrdering,
size: Size
);
fn gep(&self, ptr: &'ll Value, indices: &[&'ll Value]) -> &'ll Value;
fn inbounds_gep(&self, ptr: &'ll Value, indices: &[&'ll Value]) -> &'ll Value;
fn struct_gep(&self, ptr: &'ll Value, idx: u64) -> &'ll Value;
fn gep(&self, ptr: Self::Value, indices: &[Self::Value]) -> Self::Value;
fn inbounds_gep(&self, ptr: Self::Value, indices: &[Self::Value]) -> Self::Value;
fn struct_gep(&self, ptr: Self::Value, idx: u64) -> Self::Value;
fn trunc(&self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value;
fn sext(&self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value;
fn fptoui(&self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value;
fn fptosi(&self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value;
fn uitofp(&self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value;
fn sitofp(&self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value;
fn fptrunc(&self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value;
fn fpext(&self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value;
fn ptrtoint(&self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value;
fn inttoptr(&self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value;
fn bitcast(&self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value;
fn intcast(&self, val: &'ll Value, dest_ty: &'ll Type, is_signed: bool) -> &'ll Value;
fn pointercast(&self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value;
fn trunc(&self, val: Self::Value, dest_ty: Self::Type) -> Self::Value;
fn sext(&self, val: Self::Value, dest_ty: Self::Type) -> Self::Value;
fn fptoui(&self, val: Self::Value, dest_ty: Self::Type) -> Self::Value;
fn fptosi(&self, val: Self::Value, dest_ty: Self::Type) -> Self::Value;
fn uitofp(&self, val: Self::Value, dest_ty: Self::Type) -> Self::Value;
fn sitofp(&self, val: Self::Value, dest_ty: Self::Type) -> Self::Value;
fn fptrunc(&self, val: Self::Value, dest_ty: Self::Type) -> Self::Value;
fn fpext(&self, val: Self::Value, dest_ty: Self::Type) -> Self::Value;
fn ptrtoint(&self, val: Self::Value, dest_ty: Self::Type) -> Self::Value;
fn inttoptr(&self, val: Self::Value, dest_ty: Self::Type) -> Self::Value;
fn bitcast(&self, val: Self::Value, dest_ty: Self::Type) -> Self::Value;
fn intcast(&self, val: Self::Value, dest_ty: Self::Type, is_signed: bool) -> Self::Value;
fn pointercast(&self, val: Self::Value, dest_ty: Self::Type) -> Self::Value;
fn icmp(&self, op: IntPredicate, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn fcmp(&self, op: RealPredicate, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn icmp(&self, op: IntPredicate, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn fcmp(&self, op: RealPredicate, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn empty_phi(&self, ty: &'ll Type) -> &'ll Value;
fn phi(&self, ty: &'ll Type, vals: &[&'ll Value], bbs: &[&'ll BasicBlock]) -> &'ll Value;
fn empty_phi(&self, ty: Self::Type) -> Self::Value;
fn phi(&self, ty: Self::Type, vals: &[Self::Value], bbs: &[Self::BasicBlock]) -> Self::Value;
fn inline_asm_call(
&self,
asm: *const c_char,
cons: *const c_char,
inputs: &[&'ll Value],
output: &'ll Type,
inputs: &[Self::Value],
output: Self::Type,
volatile: bool,
alignstack: bool,
dia: AsmDialect
) -> Option<&'ll Value>;
) -> Option<Self::Value>;
fn memcpy(&self, dst: &'ll Value, dst_align: u64,
src: &'ll Value, src_align: u64,
size: &'ll Value, is_volatile: bool) -> &'ll Value;
fn memmove(&self, dst: &'ll Value, dst_align: u64,
src: &'ll Value, src_align: u64,
size: &'ll Value, is_volatile: bool) -> &'ll Value;
fn memcpy(&self, dst: Self::Value, dst_align: u64,
src: Self::Value, src_align: u64,
size: Self::Value, is_volatile: bool) -> Self::Value;
fn memmove(&self, dst: Self::Value, dst_align: u64,
src: Self::Value, src_align: u64,
size: Self::Value, is_volatile: bool) -> Self::Value;
fn minnum(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn maxnum(&self, lhs: &'ll Value, rhs: &'ll Value) -> &'ll Value;
fn minnum(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn maxnum(&self, lhs: Self::Value, rhs: Self::Value) -> Self::Value;
fn select(
&self, cond: &'ll Value,
then_val: &'ll Value,
else_val: &'ll Value,
) -> &'ll Value;
&self, cond: Self::Value,
then_val: Self::Value,
else_val: Self::Value,
) -> Self::Value;
fn va_arg(&self, list: &'ll Value, ty: &'ll Type) -> &'ll Value;
fn extract_element(&self, vec: &'ll Value, idx: &'ll Value) -> &'ll Value;
fn va_arg(&self, list: Self::Value, ty: Self::Type) -> Self::Value;
fn extract_element(&self, vec: Self::Value, idx: Self::Value) -> Self::Value;
fn insert_element(
&self, vec: &'ll Value,
elt: &'ll Value,
idx: &'ll Value,
) -> &'ll Value;
fn shuffle_vector(&self, v1: &'ll Value, v2: &'ll Value, mask: &'ll Value) -> &'ll Value;
fn vector_splat(&self, num_elts: usize, elt: &'ll Value) -> &'ll Value;
fn vector_reduce_fadd_fast(&self, acc: &'ll Value, src: &'ll Value) -> &'ll Value;
fn vector_reduce_fmul_fast(&self, acc: &'ll Value, src: &'ll Value) -> &'ll Value;
fn vector_reduce_add(&self, src: &'ll Value) -> &'ll Value;
fn vector_reduce_mul(&self, src: &'ll Value) -> &'ll Value;
fn vector_reduce_and(&self, src: &'ll Value) -> &'ll Value;
fn vector_reduce_or(&self, src: &'ll Value) -> &'ll Value;
fn vector_reduce_xor(&self, src: &'ll Value) -> &'ll Value;
fn vector_reduce_fmin(&self, src: &'ll Value) -> &'ll Value;
fn vector_reduce_fmax(&self, src: &'ll Value) -> &'ll Value;
fn vector_reduce_fmin_fast(&self, src: &'ll Value) -> &'ll Value;
fn vector_reduce_fmax_fast(&self, src: &'ll Value) -> &'ll Value;
fn vector_reduce_min(&self, src: &'ll Value, is_signed: bool) -> &'ll Value;
fn vector_reduce_max(&self, src: &'ll Value, is_signed: bool) -> &'ll Value;
fn extract_value(&self, agg_val: &'ll Value, idx: u64) -> &'ll Value;
&self, vec: Self::Value,
elt: Self::Value,
idx: Self::Value,
) -> Self::Value;
fn shuffle_vector(&self, v1: Self::Value, v2: Self::Value, mask: Self::Value) -> Self::Value;
fn vector_splat(&self, num_elts: usize, elt: Self::Value) -> Self::Value;
fn vector_reduce_fadd_fast(&self, acc: Self::Value, src: Self::Value) -> Self::Value;
fn vector_reduce_fmul_fast(&self, acc: Self::Value, src: Self::Value) -> Self::Value;
fn vector_reduce_add(&self, src: Self::Value) -> Self::Value;
fn vector_reduce_mul(&self, src: Self::Value) -> Self::Value;
fn vector_reduce_and(&self, src: Self::Value) -> Self::Value;
fn vector_reduce_or(&self, src: Self::Value) -> Self::Value;
fn vector_reduce_xor(&self, src: Self::Value) -> Self::Value;
fn vector_reduce_fmin(&self, src: Self::Value) -> Self::Value;
fn vector_reduce_fmax(&self, src: Self::Value) -> Self::Value;
fn vector_reduce_fmin_fast(&self, src: Self::Value) -> Self::Value;
fn vector_reduce_fmax_fast(&self, src: Self::Value) -> Self::Value;
fn vector_reduce_min(&self, src: Self::Value, is_signed: bool) -> Self::Value;
fn vector_reduce_max(&self, src: Self::Value, is_signed: bool) -> Self::Value;
fn extract_value(&self, agg_val: Self::Value, idx: u64) -> Self::Value;
fn insert_value(
&self,
agg_val: &'ll Value,
elt: &'ll Value,
agg_val: Self::Value,
elt: Self::Value,
idx: u64
) -> &'ll Value;
) -> Self::Value;
fn landing_pad(
&self,
ty: &'ll Type,
pers_fn: &'ll Value,
ty: Self::Type,
pers_fn: Self::Value,
num_clauses: usize
) -> &'ll Value;
fn add_clause(&self, landing_pad: &'ll Value, clause: &'ll Value);
fn set_cleanup(&self, landing_pad: &'ll Value);
fn resume(&self, exn: &'ll Value) -> &'ll Value;
) -> Self::Value;
fn add_clause(&self, landing_pad: Self::Value, clause: Self::Value);
fn set_cleanup(&self, landing_pad: Self::Value);
fn resume(&self, exn: Self::Value) -> Self::Value;
fn cleanup_pad(
&self,
parent: Option<&'ll Value>,
args: &[&'ll Value]
) -> &'ll Value;
parent: Option<Self::Value>,
args: &[Self::Value]
) -> Self::Value;
fn cleanup_ret(
&self, cleanup: &'ll Value,
unwind: Option<&'ll BasicBlock>,
) -> &'ll Value;
&self, cleanup: Self::Value,
unwind: Option<Self::BasicBlock>,
) -> Self::Value;
fn catch_pad(
&self,
parent: &'ll Value,
args: &[&'ll Value]
) -> &'ll Value;
fn catch_ret(&self, pad: &'ll Value, unwind: &'ll BasicBlock) -> &'ll Value;
parent: Self::Value,
args: &[Self::Value]
) -> Self::Value;
fn catch_ret(&self, pad: Self::Value, unwind: Self::BasicBlock) -> Self::Value;
fn catch_switch(
&self,
parent: Option<&'ll Value>,
unwind: Option<&'ll BasicBlock>,
parent: Option<Self::Value>,
unwind: Option<Self::BasicBlock>,
num_handlers: usize,
) -> &'ll Value;
fn add_handler(&self, catch_switch: &'ll Value, handler: &'ll BasicBlock);
fn set_personality_fn(&self, personality: &'ll Value);
) -> Self::Value;
fn add_handler(&self, catch_switch: Self::Value, handler: Self::BasicBlock);
fn set_personality_fn(&self, personality: Self::Value);
fn atomic_cmpxchg(
&self,
dst: &'ll Value,
cmp: &'ll Value,
src: &'ll Value,
dst: Self::Value,
cmp: Self::Value,
src: Self::Value,
order: AtomicOrdering,
failure_order: AtomicOrdering,
weak: bool,
) -> &'ll Value;
) -> Self::Value;
fn atomic_rmw(
&self,
op: AtomicRmwBinOp,
dst: &'ll Value,
src: &'ll Value,
dst: Self::Value,
src: Self::Value,
order: AtomicOrdering,
) -> &'ll Value;
) -> Self::Value;
fn atomic_fence(&self, order: AtomicOrdering, scope: SynchronizationScope);
fn add_case(&self, s: &'ll Value, on_val: &'ll Value, dest: &'ll BasicBlock);
fn add_incoming_to_phi(&self, phi: &'ll Value, val: &'ll Value, bb: &'ll BasicBlock);
fn set_invariant_load(&self, load: &'ll Value);
fn add_case(&self, s: Self::Value, on_val: Self::Value, dest: Self::BasicBlock);
fn add_incoming_to_phi(&self, phi: Self::Value, val: Self::Value, bb: Self::BasicBlock);
fn set_invariant_load(&self, load: Self::Value);
fn check_store(
&self,
val: &'ll Value,
ptr: &'ll Value
) -> &'ll Value;
val: Self::Value,
ptr: Self::Value
) -> Self::Value;
fn check_call<'b>(
&self,
typ: &str,
llfn: &'ll Value,
args: &'b [&'ll Value]
) -> Cow<'b, [&'ll Value]>;
fn lifetime_start(&self, ptr: &'ll Value, size: Size);
fn lifetime_end(&self, ptr: &'ll Value, size: Size);
llfn: Self::Value,
args: &'b [Self::Value]
) -> Cow<'b, [Self::Value]> where [Self::Value] : ToOwned;
fn lifetime_start(&self, ptr: Self::Value, size: Size);
fn lifetime_end(&self, ptr: Self::Value, size: Size);
fn call_lifetime_intrinsic(&self, intrinsic: &str, ptr: &'ll Value, size: Size);
fn call_lifetime_intrinsic(&self, intrinsic: &str, ptr: Self::Value, size: Size);
fn call(&self, llfn: &'ll Value, args: &[&'ll Value],
bundle: Option<&OperandBundleDef<'ll, &'ll Value>>) -> &'ll Value;
fn zext(&self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value;
fn call(&self, llfn: Self::Value, args: &[Self::Value],
bundle: Option<&OperandBundleDef<'ll, Self::Value>>) -> Self::Value;
fn zext(&self, val: Self::Value, dest_ty: Self::Type) -> Self::Value;
}