feat(generator): add support for map[string]bool/int/float64

[akonwi]

Summary

Extends the FFI generator to support map[string]bool, map[string]int, and map[string]float64 (previously only map[string]string was supported).

Changes

Generator Extension

• Extended GoType struct with MapValue field (replaces IsStringMap bool)
• Updated parseGoType to recognize map[string]bool, map[string]int, map[string]float64
• Updated code generation in generateParamUnwrap and generateReturnWrap

FS_ListDir Refactor

• Converted from raw FFI to idiomatic FFI
• Now returns map[string]bool (name → is_file) instead of constructing DirEntry structs in Go
• Ard code builds DirEntry structs from the map
• Eliminated getFSDirEntryType() type lookup entirely

Before/After

Before (Raw FFI)

func FS_ListDir(args []*runtime.Object) *runtime.Object {
    // ... type lookup for DirEntry
    dirEntryType := getFSDirEntryType()
    // ... manual struct construction
}

After (Idiomatic FFI)

func FS_ListDir(path string) (map[string]bool, error) {
    entries, err := os.ReadDir(path)
    // ... return simple map
}

// std_lib/fs.ard
private extern fn _list_dir_map(path: Str) [Str: Bool]!Str = "FS_ListDir"

fn list_dir(path: Str) [DirEntry]!Str {
  let entries_map = try _list_dir_map(path)
  mut entries: [DirEntry] = []
  for name, is_file in entries_map {
    entries.push(DirEntry{name: name, is_file: is_file})
  }
  Result::ok(entries)
}

Benefits

• Reduced raw FFI count: 15 → 14
• Eliminated one type lookup (GetStdType pattern)
• Simpler Go code, more logic in Ard

Testing

• All unit tests pass
• map[string]bool correctly generates .AsBool() for unwrapping and MakeBool for wrapping
• map[string]int correctly generates .AsInt() for unwrapping and MakeInt for wrapping

[vercel]

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Project	Deployment	Actions	Updated (UTC)
ard-lang-dev	Ready	Preview, Comment	Apr 10, 2026 8:35pm