Add captured call target diagnostic

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

python/ql/test/library-tests/dataflow/captured-call-targets/CallTargets.expected

@@ -0,0 +1,4 @@
+| test.py:14:13:14:38 | Attribute() | test.py:3:5:3:25 | Function compile | CallTypeStaticMethod |
+| test.py:14:13:14:38 | Attribute() | test.py:9:5:9:25 | Function compile | CallTypeStaticMethod |
+| test.py:23:16:23:21 | func() | test.py:29:1:29:12 | Function first | CallTypePlainFunction |
+| test.py:23:16:23:21 | func() | test.py:34:1:34:13 | Function second | CallTypePlainFunction |

python/ql/test/library-tests/dataflow/captured-call-targets/CallTargets.ql

@@ -0,0 +1,18 @@
+import python
+private import semmle.python.controlflow.internal.Cfg as Cfg
+private import semmle.python.dataflow.new.internal.DataFlowDispatch as Dispatch
+
+from Call call, Function target, Dispatch::CallType callType
+where
+  exists(Cfg::CallNode cfgCall |
+    cfgCall.getNode() = call and
+    Dispatch::resolveCall(cfgCall, target, callType)
+  ) and
+  call.getLocation().getFile().getRelativePath() = "test.py" and
+  target.getLocation().getFile().getRelativePath() = "test.py" and
+  (
+    call.getFunc().(Name).getId() = "func"
+    or
+    call.getFunc().(Attribute).getName() = "compile"
+  )
+select call, target, callType.toString()

python/ql/test/library-tests/dataflow/captured-call-targets/test.py

@@ -0,0 +1,39 @@
+class RegexRule:
+    @staticmethod
+    def compile(pattern):
+        return pattern
+
+
+class GlobRule:
+    @staticmethod
+    def compile(pattern):
+        return pattern
+
+
+def compile_rules(rule_type, patterns):
+    return [rule_type.compile(pattern) for pattern in patterns]
+
+
+compile_rules(RegexRule, ["x"])
+compile_rules(GlobRule, ["*"])
+
+
+def decorate(func):
+    def wrapper():
+        return func()
+
+    return wrapper
+
+
+@decorate
+def first():
+    return 1
+
+
+@decorate
+def second():
+    return 2
+
+
+first()
+second()