refactor: compile on V 0.3.2

src/util/stream.v

@@ -5,7 +5,7 @@ import io
 import os
 
 // reader_to_writer tries to consume the entire reader & write it to the writer.
-pub fn reader_to_writer(mut reader io.Reader, mut writer io.Writer) ? {
+pub fn reader_to_writer(mut reader io.Reader, mut writer io.Writer) ! {
 	mut buf := []u8{len: 10 * 1024}
 
 	for {
@@ -21,8 +21,8 @@ pub fn reader_to_writer(mut reader io.Reader, mut writer io.Writer) ? {
 }
 
 // reader_to_file writes the contents of a BufferedReader to a file
-pub fn reader_to_file(mut reader io.BufferedReader, length int, path string) ? {
-	mut file := os.create(path)?
+pub fn reader_to_file(mut reader io.BufferedReader, length int, path string) ! {
+	mut file := os.create(path)!
 	defer {
 		file.close()
 	}
@@ -69,11 +69,11 @@ pub fn match_array_in_array<T>(a1 []T, a2 []T) int {
 
 // read_until_separator consumes an io.Reader until it encounters some
 // separator array. The data read is stored inside the provided res array.
-pub fn read_until_separator(mut reader io.Reader, mut res []u8, sep []u8) ? {
+pub fn read_until_separator(mut reader io.Reader, mut res []u8, sep []u8) ! {
 	mut buf := []u8{len: sep.len}
 
 	for {
-		c := reader.read(mut buf)?
+		c := reader.read(mut buf)!
 		res << buf[..c]
 
 		match_len := match_array_in_array(buf[..c], sep)
@@ -84,7 +84,7 @@ pub fn read_until_separator(mut reader io.Reader, mut res []u8, sep []u8) ? {
 
 		if match_len > 0 {
 			match_left := sep.len - match_len
-			c2 := reader.read(mut buf[..match_left])?
+			c2 := reader.read(mut buf[..match_left])!
 			res << buf[..c2]
 
 			if buf[..c2] == sep[match_len..] {

src/util/util.v

@@ -23,7 +23,7 @@ pub fn exit_with_message(code int, msg string) {
 }
 
 // hash_file returns the sha256 hash of a given file
-pub fn hash_file(path &string) ?string {
+pub fn hash_file(path &string) !string {
 	file := os.open(path) or { return error('Failed to open file.') }
 
 	mut sha256sum := sha256.new()
@@ -39,7 +39,7 @@ pub fn hash_file(path &string) ?string {
 
 		// This function never actually fails, but returns an option to follow
 		// the Writer interface.
-		sha256sum.write(buf[..bytes_read])?
+		sha256sum.write(buf[..bytes_read])!
 	}
 
 	return sha256sum.checksum().hex()