Named port completion omits compatible signals with parameterized widths

[FukangZ]

Summary

Completion inside a named port connection does not suggest compatible in-scope signals when the port and candidate signals use parameterized packed widths such as [WIDTH-1:0].

This affects a common RTL workflow: connecting reusable parameterized modules by named ports.

Environment

• OS: Windows
• VS Code version: 1.120.0
• Vizsla extension version: 0.1.4

Minimal Reproduction

Create a workspace with these files:

completion-parameterized-width/
  .vscode/
    settings.json
  vizsla.toml
  top.sv

.vscode/settings.json:

{
  "editor.wordBasedSuggestions": "off",
  "editor.snippetSuggestions": "none"
}

vizsla.toml:

#:schema https://pascal-lab.github.io/vizsla/schemas/v1/vizsla.schema.json

top_modules = ["top"]

sources = [
  "top.sv",
]

top.sv:

module leaf #(
  parameter int WIDTH = 8
) (
  input  logic             clk,
  input  logic [WIDTH-1:0] data_i,
  output logic [WIDTH-1:0] data_o
);
endmodule

module top;
  localparam int WIDTH = 8;

  logic clk;
  logic [WIDTH-1:0] data_i;
  logic [WIDTH-1:0] data_o;

  leaf #(
    .WIDTH(WIDTH)
  ) u_leaf (
    .clk(),
    .data_i(),
    .data_o()
  );
endmodule

Reproduction Steps

1. Open the completion-parameterized-width/ directory in VS Code.
2. Wait until Vizsla is ready.
3. Open top.sv.
4. Put the cursor inside the empty .data_i() connection:

.data_i()

5. Trigger completion with Ctrl+Space.
6. Repeat inside .data_o().
7. As a control case, trigger completion inside .clk().

Expected

Inside .data_i() and .data_o(), Vizsla should suggest compatible in-scope signals:

data_i
data_o

Both candidate signals and target ports use the same parameterized packed width:

logic [WIDTH-1:0] data_i;
logic [WIDTH-1:0] data_o;

Actual

No variable candidates are shown inside .data_i() or .data_o().

The .clk() control case can still produce a suggestion for clk, so completion itself is active. The issue appears specific to signals whose type width depends on a parameter or localparam.