Add support for item access from Const data-structures

integration_tests/CMakeLists.txt

@@ -556,6 +556,7 @@ RUN(NAME test_list_compare   LABELS cpython llvm llvm_jit)
 RUN(NAME test_list_concat    LABELS cpython llvm llvm_jit c NOFAST)
 RUN(NAME test_list_reserve   LABELS cpython llvm llvm_jit)
 RUN(NAME test_const_list     LABELS cpython llvm llvm_jit)
+RUN(NAME test_const_access     LABELS cpython llvm llvm_jit)
 RUN(NAME test_tuple_01       LABELS cpython llvm llvm_jit c)
 RUN(NAME test_tuple_02       LABELS cpython llvm llvm_jit c NOFAST)
 RUN(NAME test_tuple_03       LABELS cpython llvm llvm_jit c)

integration_tests/test_const_access.py

@@ -0,0 +1,9 @@
+from lpython import i32, Const
+
+CONST_LIST: Const[list[i32]] = [1, 2, 3, 4, 5]
+CONST_DICTIONARY: Const[dict[str, i32]] = {"a": 1, "b": 2, "c": 3}
+
+assert CONST_LIST[0] == 1
+assert CONST_LIST[-2] == 4
+
+assert CONST_DICTIONARY["a"] == 1