Combining unary and increment/decrement operators

Some tools allow combinations of unary operators with increment/decrement operators (for example, ~retries++), while others reject this syntax. This combination is not standard-compliant and is not portable across simulators.

Sigasi reports this portability issue as a warning (rule 175).

VERILOG
module test;
    int retries = 3;

    always begin
        if (~retries--) begin
            $display("retry");
        end else begin
            $finish;
        end
    end
endmodule

To resolve this issue, add parentheses so the increment/decrement operation is explicitly applied first.

VERILOG
module test;
    int retries = 3;

    always begin
        if (~(retries--)) begin
            $display("retry");
        end else begin
            $finish;
        end
    end
endmodule

Rule configuration

This rule can be disabled for your project, or its severity and parameters can be modified in the project linting settings. Alternatively, it can be manually configured using one of the following templates, depending on the type of project you use.

For Modular Projects, add these entries to your project's .sigasi/settings.json settings file. To scope the settings to a specific folder or file instead of the whole project, place them inside an @override block; to scope them to a specific target, place them inside a @targets block.
JSONC
```
{
    "verilog.rules.175.severity": "{ERROR|WARNING|INFO|IGNORE}"
}
```
For Classic Projects, add the VHDL lines to .settings/com.sigasi.hdt.vhdl.linting.prefs and the Verilog/SystemVerilog lines to .settings/com.sigasi.hdt.verilog.linting.prefs:
PREFS
```
175/severity/${path}={error|warning|info|ignore}
```