add repeat()

crates/fayalite/src/expr.rs

@@ -9,7 +9,7 @@ use crate::{
         ops::ExprCastTo,
         target::{GetTarget, Target},
     },
-    int::{Bool, DynSize, IntType, SIntType, SIntValue, Size, UInt, UIntType, UIntValue},
+    int::{Bool, DynSize, IntType, SIntType, SIntValue, Size, SizeType, UInt, UIntType, UIntValue},
     intern::{Intern, Interned},
     memory::{DynPortType, MemPort, PortType},
     module::{
@@ -720,3 +720,18 @@ impl<T: Type> MakeUninitExpr for T {
         ops::Uninit::new(self).to_expr()
     }
 }
+
+pub fn repeat<T: Type, L: SizeType>(
+    element: impl ToExpr<Type = T>,
+    len: L,
+) -> Expr<ArrayType<T, L::Size>> {
+    let element = element.to_expr();
+    let canonical_element = Expr::canonical(element);
+    ops::ArrayLiteral::new(
+        Expr::ty(element),
+        std::iter::repeat(canonical_element)
+            .take(L::Size::as_usize(len))
+            .collect(),
+    )
+    .to_expr()
+}

crates/fayalite/src/prelude.rs

@@ -7,7 +7,7 @@ pub use crate::{
     clock::{Clock, ClockDomain, ToClock},
     enum_::{HdlNone, HdlOption, HdlSome},
     expr::{
-        CastBitsTo, CastTo, CastToBits, Expr, HdlPartialEq, HdlPartialOrd, MakeUninitExpr,
+        repeat, CastBitsTo, CastTo, CastToBits, Expr, HdlPartialEq, HdlPartialOrd, MakeUninitExpr,
         ReduceBits, ToExpr,
     },
     hdl, hdl_module,