v: show the number of processed bytes and lines for V source code with -stats

vlib/v/ast/ast.v

@@ -543,6 +543,8 @@ pub struct File {
 pub:
 	path         string // absolute path of the source file - '/projects/v/file.v'
 	path_base    string // file name - 'file.v' (useful for tracing)
+	lines        int    // number of source code lines in the file (including newlines and comments)
+	bytes        int    // number of processed source code bytes
 	mod          Module // the module of the source file (from `module xyz` at the top)
 	global_scope &Scope
 pub mut:

vlib/v/builder/c.v

@@ -48,6 +48,12 @@ pub fn (mut b Builder) build_c(v_files []string, out_file string) {
 	if b.pref.is_stats {
 		slines := util.bold((output2.count('\n') + 1).str())
 		sbytes := util.bold(output2.len.str())
+		mut all_v_source_lines, mut all_v_source_bytes := 0, 0
+		for mut pf in b.parsed_files {
+			all_v_source_lines += pf.lines
+			all_v_source_bytes += pf.bytes
+		}
+		println('          V source code size: ${util.bold(all_v_source_lines.str())} lines, ${util.bold(all_v_source_bytes.str())} bytes')
 		println('generated C source code size: $slines lines, $sbytes bytes')
 	}
 	// os.write_file(out_file, b.gen_c(v_files))

vlib/v/parser/parser.v

@@ -272,6 +272,8 @@ pub fn (mut p Parser) parse() ast.File {
 	return ast.File{
 		path: p.file_name
 		path_base: p.file_base
+		lines: p.scanner.line_nr
+		bytes: p.scanner.text.len
 		mod: module_decl
 		imports: p.ast_imports
 		imported_symbols: p.imported_symbols