[FEATURE] Show hex, binary, and octal conversions when hovering over numeric literals

[nselvara]

Halli hallo,

Feature Description

When hovering over a numeric literal (binary bit_vector / std_(u)logic_vector, hex literal, or decimal), the tooltip currently shows signed/unsigned decimal conversions. It would be useful to also display the value in hex, binary, and octal, so you can cross-check representations without leaving the editor.

Current behaviour

The tooltip shows only signed/unsigned decimal:

Proposed output

For a literal like "10100101" or x"A5", the tooltip could show:

Format	Value
Bin	1010_0101
Hex	0xA5
Oct	0o245
Dec (u)	165
Dec (s)	-91

Relevant literal types

• Binary string literals: "10100101"
• Hex literals: x"A5", x"5A"
• Based literals: 16#F0#, 8#360#
• Decimal values passed to to_unsigned / to_signed

Example code

type pattern_array_t is array (natural range <>) of std_ulogic_vector(7 downto 0);
constant TEST_PATTERNS : pattern_array_t := (
    "10100101",                              -- 0xA5
    x"5A",                                   -- 0x5A
    std_ulogic_vector(to_unsigned(16#F0#, 8)), -- 240
    std_ulogic_vector(to_unsigned(8#360#, 8)), -- 0xF0
    std_ulogic_vector(to_unsigned(204, 8))     -- 0xCC
);

Note

• Octal is lower priority and could be hidden behind a config option if it clutters things
• Grouping digits (e.g. 1010_0101) would help readability for wider vectors

[Schottkyc137]

I think the tooltip is not part of some third-party addon, not vhdl-ls.
I assume this is a general feature that vhdl-ls should have this capability then?

[nselvara]

Oh, I didn't realise that. 😅
Yeah, I guess, then I'd propose this as a general feature request which would be super nice to enhance the understandability of VHDL code.