Integer Literal Converter
Convert the integer literal under the cursor between decimal, hexadecimal, octal, and binary.
This extension is built for language-aware code editing rather than plain text replacement. It preserves the syntax that makes sense for the current file, exposes separate bindable commands for each target base, and includes a cycle command for quick repeated switching.
Features
- Convert the literal under the cursor directly to decimal, hexadecimal, octal, or binary.
- Cycle through the supported formats for the current language.
- Respect language-specific syntax instead of forcing one style everywhere.
- Preserve supported integer suffixes such as
n, U, UL, ULL, and L.
- Support multi-cursor edits.
- Show a hover preview with the equivalent literal formats.
Example
Examples of what the commands do:
// C++
493 -> 0755
0755 -> 0b111101101
42U -> 0x2aU
// TypeScript
10n -> 0xan
0xan -> 0o12n
0b1010 -> 10
// Java
42L -> 0x2aL
0x2aL -> 052L
Supported Languages
The extension chooses literal syntax based on the active editor language.
| Language group |
Behavior |
| C and C++ |
Uses native forms such as 0755, 0b1010, digit separators with ', and suffixes like U, UL, and ULL. |
| Java |
Uses native forms such as 0755, _ digit separators, and L suffixes. |
| C# |
Uses 0x and 0b forms plus U, L, and UL suffixes. Octal is skipped because C# does not support octal integer literals. |
| Swift |
Uses 0o octal syntax and _ separators. |
| Generic profile |
Used for languages such as JavaScript and TypeScript. Supports 0x, 0o, 0b, _ separators, and bigint n suffixes. |
Commands
All commands are normal VS Code commands, so they can be run from the Command Palette or bound to keys.
| Title |
Command ID |
| Integer Literal: Convert to Decimal |
integerLiteral.convertToDecimal |
| Integer Literal: Convert to Hexadecimal |
integerLiteral.convertToHexadecimal |
| Integer Literal: Convert to Octal |
integerLiteral.convertToOctal |
| Integer Literal: Convert to Binary |
integerLiteral.convertToBinary |
| Integer Literal: Cycle Base |
integerLiteral.cycleBase |
Cycle order follows the formats supported by the current language. In languages with full support, the order is:
decimal -> hexadecimal -> octal -> binary -> decimal
In C#, octal is skipped.
Hover Preview
Hovering an integer literal can show the equivalent forms for that value in the active language syntax.
Examples:
- C and C++ hovers show native octal like
0755.
- C# hovers omit octal because the language does not support it.
- Generic and Swift hovers show
0o octal.
Extension Settings
This extension contributes the following setting:
integerLiteral.hover.enabled: Enable or disable hover previews for integer literals. Default: true.
Suggested Keybindings
Example keybindings.json entries:
[
{
"key": "ctrl+alt+h",
"command": "integerLiteral.convertToHexadecimal",
"when": "editorTextFocus"
},
{
"key": "ctrl+alt+d",
"command": "integerLiteral.convertToDecimal",
"when": "editorTextFocus"
},
{
"key": "ctrl+alt+o",
"command": "integerLiteral.convertToOctal",
"when": "editorTextFocus"
},
{
"key": "ctrl+alt+b",
"command": "integerLiteral.convertToBinary",
"when": "editorTextFocus"
},
{
"key": "ctrl+alt+c",
"command": "integerLiteral.cycleBase",
"when": "editorTextFocus"
}
]
Notes
- The extension only changes the literal under the active cursor or cursors.
- Unsupported output formats are not offered for languages that do not support them.
- The conversion logic is covered by unit tests and VS Code extension-host integration tests.
Development
npm install
npm test
