143 lines
5.2 KiB
Markdown
143 lines
5.2 KiB
Markdown
# Visual Studio Code Setup
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## Table of Contents
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* [V language support](#v-language-support)
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* [Visual Debugging](#visual-debugging)
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## V language support
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The [V VS Code Extention](https://marketplace.visualstudio.com/items?itemName=vlanguage.vscode-vlang)
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provides V language support for Visual Studio Code.
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**Features:**
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* Syntax Highlighting.
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* Code Snippets for quick coding.
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* Format code on file save as well as format manually (using v fmt).
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* Linter (Workspace files only).
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[more](https://marketplace.visualstudio.com/items?itemName=vlanguage.vscode-vlang)
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**Hint:** This extension will not add the V compiler! Information on how to
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[install V compiler](https://github.com/vlang/v/blob/master/doc/docs.md#install-from-source)
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on your operating system.
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### Setup Extension
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Install [V VS Code Extension](https://marketplace.visualstudio.com/items?itemName=vlanguage.vscode-vlang).
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## Visual Debugging
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The [C/C++ Extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode.cpptools)
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for Visual Studio Code provides visual conditional debugging.
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**Features:**
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* Conditional breakpoints
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* Function breakpoints
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* Expression evaluation
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* Change Values
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[more Features & Documentation](https://code.visualstudio.com/docs/cpp/cpp-debug)
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**Hint:** Not all types (e.g. Array) in V currently create the required
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[DWARF](https://en.wikipedia.org/wiki/DWARF) information to show and
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edit the variable.
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### Setup Debugging
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#### Step1: Configure the launch.json file
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1. Install the [C/C++ Extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode.cpptools)
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2. Open `RUN AND DEBUG` panel (Debug Icon in left panel).
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3. Click on `Show` all automatic debug configurations.
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4. Select `Add config`.
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5. Select environment `C++ (GDB/LLDB)`.
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6. Change the line `"program": "Enter the program name, e.g. \"${workspaceFolder}/a.out\"",`
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to point to your compiled application e.g. `"program": "${workspaceFolder}/hello",`
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or a more flexible one `"program": "${fileDirname}/${fileBasenameNoExtension}",`
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when you want to debug the current opened file.
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This will add a block to your `.workspace` file,
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or create the file `.vscode/launch.json`:
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```json
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{
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// Use IntelliSense to learn about possible attributes.
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// Hover to view descriptions of existing attributes.
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// For more information, visit:
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// https://go.microsoft.com/fwlink/?linkid=830387
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"version": "0.2.0",
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"configurations": [
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{
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"name": "(lldb) Start",
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"type": "cppdbg",
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"request": "launch",
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"program": "Enter the program name, e.g. \"${workspaceFolder}/a.out\"",
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"args": [],
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"stopAtEntry": false,
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"cwd": "${fileDirname}",
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"environment": [],
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"externalConsole": false,
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"MIMode": "lldb",
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"preLaunchTask": "build"
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}
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]
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}
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```
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**Optional:** use `"program": "${fileDirname}/${fileBasenameNoExtension}"` to debug
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any current open source file with an existing binary with the same name but without any extension.
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#### Step2: Configure the task.json file
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Generally, you can manually compile the application with: `v -b c -g hello.v -o hello`,
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or for short: `v -g hello.v`, and then call the debugger.
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The `-g` option will add the needed debugging information.
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You can find more debugging options in the [docs](docs.md#debugging).
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VS Code provides a hook called `preLaunchTask`, which can be used to compile
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the application automatially every time you call the debugger.
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[preLaunchTask](https://code.visualstudio.com/docs/editor/debugging#_launchjson-attributes) launches
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a task before the start of a debug session, set this attribute to the label of a task specified
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in [task.json](https://code.visualstudio.com/docs/editor/tasks) (in the workspace's .vscode folder).
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Or, this can be set to `${defaultBuildTask}`, to use your default build task.
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As explained, the `"preLaunchTask": "build"` needs to work with a `.vscode/task.json`
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with a label named `build`.
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```json
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{
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// See https://go.microsoft.com/fwlink/?LinkId=733558
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// for the documentation about the tasks.json format
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"version": "2.0.0",
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"tasks": [
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{
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"label": "build",
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"type": "shell",
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"command": "v",
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"args": [
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"-g", // add more compiler options here if necessary
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"${relativeFile}" // or modify it according to your requirements
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],
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"group": "build",
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"presentation": {
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"reveal": "silent"
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},
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"problemMatcher": "$gcc"
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}
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]
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}
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```
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### Usage
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To allow your compiled application to be debugged.
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The application needs to include additional debugging information
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([DWARF](https://en.wikipedia.org/wiki/DWARF)).
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1. Open your source code and set the required break points
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2. Click on the Debug Icon in the left Icon panel and click
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`> (lldb) Start`, or use `F5` to launch your application in debug mode.
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For all options look at the official
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[C/C++ Extension documentation](https://code.visualstudio.com/docs/cpp/cpp-debug).
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