1 files changed, 60 insertions, 0 deletions
diff --git a/gdb/python/lib/gdb/dap/completions.py b/gdb/python/lib/gdb/dap/completions.py
new file mode 100644
index 0000000..85acc43
--- /dev/null
+++ b/gdb/python/lib/gdb/dap/completions.py
@@ -0,0 +1,60 @@
+# Copyright 2025 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from typing import Optional
+
+from .frames import select_frame
+from .server import capability, import_column, import_line, request
+from .startup import exec_mi_and_log
+
+
+@request("completions")
+@capability("supportsCompletionsRequest")
+@capability("completionTriggerCharacters", [" ", "."])
+def completions(
+    *,
+    frameId: Optional[int] = None,
+    text: str,
+    column: int,
+    line: Optional[int] = None,
+    **extra,
+):
+    if frameId is not None:
+        select_frame(frameId)
+
+    column = import_column(column)
+    if line is None:
+        line = 1
+    else:
+        line = import_line(line)
+    text = text.splitlines()[line - 1]
+    text = text[: column - 1]
+    mi_result = exec_mi_and_log("-complete", text)
+    result = []
+    completion = None
+    if "completion" in mi_result:
+        completion = mi_result["completion"]
+        result.append({"label": completion, "length": len(completion)})
+    # If `-complete' finds one match then `completion' and `matches'
+    # will contain the same one match.
+    if (
+        completion is not None
+        and len(mi_result["matches"]) == 1
+        and completion == mi_result["matches"][0]
+    ):
+        return {"targets": result}
+    for match in mi_result["matches"]:
+        result.append({"label": match, "length": len(match)})
+    return {"targets": result}