Implemented struct parser

src/scanner/scanStruct.go

@@ -0,0 +1,66 @@
+package scanner
+
+import (
+	"git.akyoto.dev/cli/q/src/errors"
+	"git.akyoto.dev/cli/q/src/fs"
+	"git.akyoto.dev/cli/q/src/token"
+	"git.akyoto.dev/cli/q/src/types"
+)
+
+// scanStruct scans a struct.
+func (s *Scanner) scanStruct(file *fs.File, tokens token.List, i int) (int, error) {
+	i++
+
+	if tokens[i].Kind != token.Identifier {
+		return i, errors.New(errors.ExpectedStructName, file, tokens[i].Position)
+	}
+
+	structName := tokens[i].Text(file.Bytes)
+
+	typ := &types.Type{
+		Name: structName,
+	}
+
+	i++
+
+	if tokens[i].Kind != token.BlockStart {
+		return i, errors.New(errors.MissingBlockStart, file, tokens[i].Position)
+	}
+
+	i++
+	closed := false
+
+	for i < len(tokens) {
+		if tokens[i].Kind == token.Identifier {
+			fieldPosition := i
+			fieldName := tokens[i].Text(file.Bytes)
+			i++
+			fieldTypeName := tokens[i].Text(file.Bytes)
+			fieldType := types.Parse(fieldTypeName)
+			i++
+
+			typ.Fields = append(typ.Fields, &types.Field{
+				Type:     fieldType,
+				Name:     fieldName,
+				Position: token.Position(fieldPosition),
+				Offset:   typ.Size,
+			})
+
+			typ.Size += fieldType.Size
+		}
+
+		if tokens[i].Kind == token.BlockEnd {
+			closed = true
+			break
+		}
+
+		i++
+	}
+
+	if !closed {
+		return i, errors.New(errors.MissingBlockEnd, file, tokens[i].Position)
+	}
+
+	s.types <- typ
+	return i, nil
+}