From d65b1c55782f6a9d89cd5bc7c7337397dcf4b85c Mon Sep 17 00:00:00 2001
From: hachem <im@hachem.wtf>
Date: Tue, 24 Sep 2024 21:44:48 +0200
Subject: Prepare for quantum circuit

---
 Cargo.toml                        |  2 +-
 libpsi-core/src/core/circuit.rs   | 25 +++++++++++++++++++++++++
 libpsi-core/src/core/component.rs |  2 +-
 libpsi-core/src/core/mod.rs       |  3 +++
 libpsi-core/src/lib.rs            |  1 +
 libpsi-tester/Cargo.toml          |  2 +-
 libpsi-tester/src/main.rs         | 20 ++------------------
 7 files changed, 34 insertions(+), 21 deletions(-)
 create mode 100644 libpsi-core/src/core/circuit.rs

diff --git a/Cargo.toml b/Cargo.toml
index d82fbd0..05cf0fd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [workspace]
 resolver = "2"
 members = [
-    "libpsi",
+    "libpsi-core",
     "libpsi-tester"
 ]
\ No newline at end of file
diff --git a/libpsi-core/src/core/circuit.rs b/libpsi-core/src/core/circuit.rs
new file mode 100644
index 0000000..65e359a
--- /dev/null
+++ b/libpsi-core/src/core/circuit.rs
@@ -0,0 +1,25 @@
+use super::{ClassicalRegister, QuantumBit, QuantumGate};
+
+#[allow(dead_code)]
+struct QuantumCircuitInstruction {
+    target_indices: Vec<i32>,
+    control_indices: Vec<i32>,
+    gate: QuantumGate,
+}
+
+#[allow(dead_code)]
+pub struct QuantumCircuit {
+    quantum_bits: Vec<QuantumBit>,
+    classical_register: ClassicalRegister,
+    instructions: Vec<QuantumCircuitInstruction>,
+}
+
+impl QuantumCircuit {
+    pub fn new(quantum_bit_count: usize, classical_bit_count: usize) -> QuantumCircuit {
+        QuantumCircuit {
+            quantum_bits: Vec::with_capacity(quantum_bit_count),
+            classical_register: ClassicalRegister::new(classical_bit_count),
+            instructions: Vec::new(),
+        }
+    }
+}
diff --git a/libpsi-core/src/core/component.rs b/libpsi-core/src/core/component.rs
index 41b7cc7..00462e5 100644
--- a/libpsi-core/src/core/component.rs
+++ b/libpsi-core/src/core/component.rs
@@ -1,5 +1,5 @@
 use crate::{complex, ColumnVector, Complex, Matrix, Vector, VectorMatrix};
-use core::{fmt, ops};
+use core::ops;
 
 pub type QuantumBit = ColumnVector<Complex<f64>>;
 pub type QuantumGate = Matrix<Complex<f64>>;
diff --git a/libpsi-core/src/core/mod.rs b/libpsi-core/src/core/mod.rs
index 374c555..2f42682 100644
--- a/libpsi-core/src/core/mod.rs
+++ b/libpsi-core/src/core/mod.rs
@@ -1,4 +1,7 @@
+pub mod circuit;
 pub mod component;
 pub mod gates;
 
+pub use circuit::*;
+pub use component::*;
 pub use gates::*;
diff --git a/libpsi-core/src/lib.rs b/libpsi-core/src/lib.rs
index af50663..45c2c3b 100644
--- a/libpsi-core/src/lib.rs
+++ b/libpsi-core/src/lib.rs
@@ -6,5 +6,6 @@ pub use maths::matrix::*;
 pub use maths::numeric_traits::*;
 pub use maths::vector::*;
 
+pub use core::circuit::*;
 pub use core::component::*;
 pub use core::gates;
diff --git a/libpsi-tester/Cargo.toml b/libpsi-tester/Cargo.toml
index 6e6ae37..bfa4611 100644
--- a/libpsi-tester/Cargo.toml
+++ b/libpsi-tester/Cargo.toml
@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-libpsi = { path = "../libpsi" }
\ No newline at end of file
+libpsi-core = { path = "../libpsi-core" }
\ No newline at end of file
diff --git a/libpsi-tester/src/main.rs b/libpsi-tester/src/main.rs
index 08229f2..3fd8de2 100644
--- a/libpsi-tester/src/main.rs
+++ b/libpsi-tester/src/main.rs
@@ -1,21 +1,5 @@
-use libpsi::*;
+use libpsi_core::*;
 
 fn main() {
-    let mut quantum_register = quantum_register![QuantumBit::state_0()];
-    let mut classical_register = ClassicalRegister::new(1);
-
-    quantum_register.measure(&mut classical_register);
-    println!("|{}>", classical_register[0]);
-
-    quantum_register.apply(&gates::HADAMARD, 0);
-    quantum_register.measure(&mut classical_register);
-    println!("|{}>", classical_register[0]);
-
-    quantum_register.apply(&gates::HADAMARD, 0);
-    quantum_register.measure(&mut classical_register);
-    println!("|{}>", classical_register[0]);
-
-    quantum_register.apply(&gates::HADAMARD, 0);
-    quantum_register.measure(&mut classical_register);
-    println!("|{}>", classical_register[0]);
+    let _circuit = QuantumCircuit::new(2, 2);
 }
-- 
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