Added support for grouping boolean options by short name

README.md

@@ -10,13 +10,14 @@
 
 A simple, intuitive library for building CLI applications in D.
 
-**[API Reference Documentation](https://modpm.github.io/cmd)**
+[**API Reference Documentation**](https://modpm.github.io/cmd)
 
 ## Features
 
 - **Nested subcommands** — Supports hierarchical command structures, allowing commands to contain other commands.
 - **Flexible arguments** — Required (`<>`) and optional (`[]`) arguments with variadic support (`...`).
-- **Rich option handling** — Supports `--option=value` and `--option value` forms.
+- **Rich option handling** — Supports `--option=value`, `--option value`, and grouped short flags such as `-abc`
+(equivalent to `-a -b -c`).
 - **Automatic help generation** — Built-in help and usage text generation.
 - **Array collection** — Repeated options are automatically collected as arrays.
 - **Type-safe parsing** — Clean API for accessing parsed arguments and options.

src/cmd/command.d

@@ -254,7 +254,7 @@ public class Command {
     public int printHelp() const {
         auto doc = new Document();
         doc.add("Usage:".bold(), usage(true));
-        
+
         if (descriptionStr !is null)
             doc.add("Description:".bold(), descriptionStr);
 
@@ -330,6 +330,22 @@ public class Command {
                 if (program.helpOption() !is null && program.helpOption().matches(arg))
                     exit(printHelp());
 
+                if (arg.length > 2 && arg[0] == '-' && arg[1] != '-') {
+                    foreach (c; arg[1 .. $]) {
+                        const shortArg = "-" ~ c;
+                        const(Flag) f = findFlag(shortArg);
+                        if (f !is null) {
+                            parsedArgs.setFlag(f);
+                            continue;
+                        }
+                        const(Option) opt = findOption(shortArg);
+                        if (opt !is null)
+                            error("missing value for option '" ~ shortArg ~ "'", 2);
+                        program.error("unknown option '" ~ shortArg ~ "'", 2);
+                    }
+                    continue;
+                }
+
                 const(Flag) flag = findFlag(arg);
                 if (flag !is null) {
                     parsedArgs.setFlag(flag);
@@ -342,7 +358,7 @@ public class Command {
                 if (option !is null) {
                     string value;
                     if (equalsIndex >= 0)
-                        value =arg[equalsIndex + 1..$];
+                        value = arg[equalsIndex + 1..$];
                     else if (i + 1 < args.length)
                         value = args[++i];
                     else