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use super::BackendTypes;
use crate::mir::place::PlaceRef;
use rustc::mir::interpret::Allocation;
use rustc::mir::interpret::Scalar;
use rustc::ty::layout;
use syntax::symbol::LocalInternedString;
pub trait ConstMethods<'tcx>: BackendTypes {
// Constant constructors
fn const_null(&self, t: Self::Type) -> Self::Value;
fn const_undef(&self, t: Self::Type) -> Self::Value;
fn const_int(&self, t: Self::Type, i: i64) -> Self::Value;
fn const_uint(&self, t: Self::Type, i: u64) -> Self::Value;
fn const_uint_big(&self, t: Self::Type, u: u128) -> Self::Value;
fn const_bool(&self, val: bool) -> Self::Value;
fn const_i32(&self, i: i32) -> Self::Value;
fn const_u32(&self, i: u32) -> Self::Value;
fn const_u64(&self, i: u64) -> Self::Value;
fn const_usize(&self, i: u64) -> Self::Value;
fn const_u8(&self, i: u8) -> Self::Value;
// This is a 'c-like' raw string, which differs from
// our boxed-and-length-annotated strings.
fn const_cstr(&self, s: LocalInternedString, null_terminated: bool) -> Self::Value;
fn const_str_slice(&self, s: LocalInternedString) -> Self::Value;
fn const_fat_ptr(&self, ptr: Self::Value, meta: Self::Value) -> Self::Value;
fn const_struct(&self, elts: &[Self::Value], packed: bool) -> Self::Value;
fn const_array(&self, ty: Self::Type, elts: &[Self::Value]) -> Self::Value;
fn const_vector(&self, elts: &[Self::Value]) -> Self::Value;
fn const_bytes(&self, bytes: &[u8]) -> Self::Value;
fn const_get_elt(&self, v: Self::Value, idx: u64) -> Self::Value;
fn const_get_real(&self, v: Self::Value) -> Option<(f64, bool)>;
fn const_to_uint(&self, v: Self::Value) -> u64;
fn const_to_opt_u128(&self, v: Self::Value, sign_ext: bool) -> Option<u128>;
fn is_const_integral(&self, v: Self::Value) -> bool;
fn is_const_real(&self, v: Self::Value) -> bool;
fn scalar_to_backend(
&self,
cv: Scalar,
layout: &layout::Scalar,
llty: Self::Type,
) -> Self::Value;
fn from_const_alloc(
&self,
layout: layout::TyLayout<'tcx>,
alloc: &Allocation,
offset: layout::Size,
) -> PlaceRef<'tcx, Self::Value>;
fn const_ptrcast(&self, val: Self::Value, ty: Self::Type) -> Self::Value;
}
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