all: change optional to result in most of the libraries (#16123)

vlib/readline/readline_default.c.v

@@ -23,7 +23,7 @@ struct Termios {
 // an error if the line is empty.
 // The `prompt` `string` is output as a prefix text for the input capturing.
 // read_line_utf8 is the main method of the `readline` module and `Readline` struct.
-pub fn (mut r Readline) read_line_utf8(prompt string) ?[]rune {
+pub fn (mut r Readline) read_line_utf8(prompt string) ![]rune {
 	r.current = []rune{}
 	r.cursor = 0
 	r.prompt = prompt
@@ -49,8 +49,8 @@ pub fn (mut r Readline) read_line_utf8(prompt string) ?[]rune {
 
 // read_line does the same as `read_line_utf8` but returns user input as a `string`.
 // (As opposed to `[]rune` returned by `read_line_utf8`).
-pub fn (mut r Readline) read_line(prompt string) ?string {
-	s := r.read_line_utf8(prompt)?
+pub fn (mut r Readline) read_line(prompt string) !string {
+	s := r.read_line_utf8(prompt)!
 	return s.string()
 }
 
@@ -63,9 +63,9 @@ pub fn (mut r Readline) read_line(prompt string) ?string {
 // read_line_utf8 is the main method of the `readline` module and `Readline` struct.
 // NOTE that this version of `read_line_utf8` is a standalone function without
 // persistent functionalities (e.g. history).
-pub fn read_line_utf8(prompt string) ?[]rune {
+pub fn read_line_utf8(prompt string) ![]rune {
 	mut r := Readline{}
-	s := r.read_line_utf8(prompt)?
+	s := r.read_line_utf8(prompt)!
 	return s
 }
 
@@ -73,8 +73,8 @@ pub fn read_line_utf8(prompt string) ?[]rune {
 // (As opposed to `[]rune` as returned by `read_line_utf8`).
 // NOTE that this version of `read_line` is a standalone function without
 // persistent functionalities (e.g. history).
-pub fn read_line(prompt string) ?string {
+pub fn read_line(prompt string) !string {
 	mut r := Readline{}
-	s := r.read_line(prompt)?
+	s := r.read_line(prompt)!
 	return s
 }

vlib/readline/readline_js.js.v

@@ -15,7 +15,7 @@ struct Termios {}
 // The `prompt` `string` is output as a prefix text for the input capturing.
 // read_line_utf8 is the main method of the `readline` module and `Readline` struct.
 
-pub fn (mut r Readline) read_line(prompt string) ?string {
+pub fn (mut r Readline) read_line(prompt string) !string {
 	res := ''
 	print(prompt)
 	#const rl = $readline.createInterface({input: $process.stdin,output: $process.stdout,prompt: prompt.str})
@@ -25,8 +25,8 @@ pub fn (mut r Readline) read_line(prompt string) ?string {
 	return res
 }
 
-pub fn read_line(prompt string) ?string {
+pub fn read_line(prompt string) !string {
 	mut r := Readline{}
-	s := r.read_line(prompt)?
+	s := r.read_line(prompt)!
 	return s
 }

vlib/readline/readline_linux.c.v

@@ -133,7 +133,7 @@ pub fn (r Readline) read_char() !int {
 // an error if the line is empty.
 // The `prompt` `string` is output as a prefix text for the input capturing.
 // read_line_utf8 is the main method of the `readline` module and `Readline` struct.
-pub fn (mut r Readline) read_line_utf8(prompt string) ?[]rune {
+pub fn (mut r Readline) read_line_utf8(prompt string) ![]rune {
 	r.current = []rune{}
 	r.cursor = 0
 	r.prompt = prompt
@@ -168,8 +168,8 @@ pub fn (mut r Readline) read_line_utf8(prompt string) ?[]rune {
 
 // read_line does the same as `read_line_utf8` but returns user input as a `string`.
 // (As opposed to `[]rune` returned by `read_line_utf8`).
-pub fn (mut r Readline) read_line(prompt string) ?string {
-	s := r.read_line_utf8(prompt)?
+pub fn (mut r Readline) read_line(prompt string) !string {
+	s := r.read_line_utf8(prompt)!
 	return s.string()
 }
 
@@ -182,9 +182,9 @@ pub fn (mut r Readline) read_line(prompt string) ?string {
 // read_line_utf8 is the main method of the `readline` module and `Readline` struct.
 // NOTE that this version of `read_line_utf8` is a standalone function without
 // persistent functionalities (e.g. history).
-pub fn read_line_utf8(prompt string) ?[]rune {
+pub fn read_line_utf8(prompt string) ![]rune {
 	mut r := Readline{}
-	s := r.read_line_utf8(prompt)?
+	s := r.read_line_utf8(prompt)!
 	return s
 }
 
@@ -192,9 +192,9 @@ pub fn read_line_utf8(prompt string) ?[]rune {
 // (As opposed to `[]rune` as returned by `read_line_utf8`).
 // NOTE that this version of `read_line` is a standalone function without
 // persistent functionalities (e.g. history).
-pub fn read_line(prompt string) ?string {
+pub fn read_line(prompt string) !string {
 	mut r := Readline{}
-	s := r.read_line(prompt)?
+	s := r.read_line(prompt)!
 	return s
 }
 

vlib/readline/readline_windows.c.v

@@ -24,7 +24,7 @@ struct Termios {
 // an error if the line is empty.
 // The `prompt` `string` is output as a prefix text for the input capturing.
 // read_line_utf8 is the main method of the `readline` module and `Readline` struct.
-pub fn (mut r Readline) read_line_utf8(prompt string) ?[]rune {
+pub fn (mut r Readline) read_line_utf8(prompt string) ![]rune {
 	r.current = []rune{}
 	r.cursor = 0
 	r.prompt = prompt
@@ -47,8 +47,8 @@ pub fn (mut r Readline) read_line_utf8(prompt string) ?[]rune {
 
 // read_line does the same as `read_line_utf8` but returns user input as a `string`.
 // (As opposed to `[]rune` returned by `read_line_utf8`).
-pub fn (mut r Readline) read_line(prompt string) ?string {
-	s := r.read_line_utf8(prompt)?
+pub fn (mut r Readline) read_line(prompt string) !string {
+	s := r.read_line_utf8(prompt)!
 	return s.string()
 }
 
@@ -61,9 +61,9 @@ pub fn (mut r Readline) read_line(prompt string) ?string {
 // read_line_utf8 is the main method of the `readline` module and `Readline` struct.
 // NOTE that this version of `read_line_utf8` is a standalone function without
 // persistent functionalities (e.g. history).
-pub fn read_line_utf8(prompt string) ?[]rune {
+pub fn read_line_utf8(prompt string) ![]rune {
 	mut r := Readline{}
-	s := r.read_line_utf8(prompt)?
+	s := r.read_line_utf8(prompt)!
 	return s
 }
 
@@ -71,8 +71,8 @@ pub fn read_line_utf8(prompt string) ?[]rune {
 // (As opposed to `[]rune` as returned by `read_line_utf8`).
 // NOTE that this version of `read_line` is a standalone function without
 // persistent functionalities (e.g. history).
-pub fn read_line(prompt string) ?string {
+pub fn read_line(prompt string) !string {
 	mut r := Readline{}
-	s := r.read_line(prompt)?
+	s := r.read_line(prompt)!
 	return s
 }