Add missing express_nolookup for HGate → sHadamard under CliffordRepr (#174)

Co-authored-by: Stefan Krastanov <github.acc@krastanov.org>
Co-authored-by: Stefan Krastanov <stefan@krastanov.org>

Author: giovanniligato

CHANGELOG.md

@@ -1,5 +1,9 @@
 # News
 
+## v0.4.13 - 2026-03-03
+
+- The H gate was missing a `CliffordRepr` `express`
+
 ## v0.4.12 - 2026-02-06
 
 - Add Gabs extension for numerical translations of symbolic Gaussian states and operators.

Project.toml

@@ -1,7 +1,7 @@
 name = "QuantumSymbolics"
 uuid = "efa7fd63-0460-4890-beb7-be1bbdfbaeae"
 authors = ["QuantumSymbolics.jl contributors"]
-version = "0.4.12"
+version = "0.4.13"
 
 [workspace]
 projects = ["benchmark", "docs"]

ext/QuantumCliffordExt/QuantumCliffordExt.jl

@@ -47,6 +47,7 @@ end
 express_nolookup(::XGate,            ::CliffordRepr, ::UseAsOperation) = QuantumClifford.sX
 express_nolookup(::YGate,            ::CliffordRepr, ::UseAsOperation) = QuantumClifford.sY
 express_nolookup(::ZGate,            ::CliffordRepr, ::UseAsOperation) = QuantumClifford.sZ
+express_nolookup(::HGate,            ::CliffordRepr, ::UseAsOperation) = QuantumClifford.sHadamard
 express_nolookup(x::STensorOperator,  r::CliffordRepr, u::UseAsOperation) = QCGateSequence([express(t,r,u) for t in x.terms])
 
 express_nolookup(op::QuantumClifford.PauliOperator, ::CliffordRepr, ::UseAsObservable) = op