pref: temporary 64 bit int option

vlib/builtin/option.v

@@ -5,7 +5,7 @@ module builtin
 
 // Option is the base of V's internal option return system.
 struct Option {
-	state u8
+	state u8 // 0 - ok; 2 - none; 1 - ?
 	err   IError = none__
 	// Data is trailing after err
 	// and is not included in here but in the

vlib/v/ast/ast.v

@@ -9,6 +9,13 @@ import v.pref
 
 pub type TypeDecl = AliasTypeDecl | FnTypeDecl | SumTypeDecl
 
+pub const int_type_name = $if amd64 || arm64 {
+	'i32'
+	//'i64'
+} $else {
+	'i32'
+}
+
 pub type Expr = AnonFn
 	| ArrayDecompose
 	| ArrayInit

vlib/v/gen/c/cgen.v

@@ -1006,8 +1006,8 @@ fn (mut g Gen) base_type(_t ast.Type) string {
 	}
 	// On 64 bit systems int is an i64
 	$if amd64 || arm64 {
-		if t == ast.int_type {
-			// return 'i64'
+		if g.pref.use_64_int && t == ast.int_type {
+			return 'i64'
 		}
 	}
 	share := t.share()
@@ -1115,6 +1115,8 @@ fn (g Gen) option_type_text(styp string, base string) string {
 	// replace void with something else
 	size := if base == 'void' {
 		'u8'
+	} else if base == 'int' {
+		ast.int_type_name
 	} else if base.starts_with('anon_fn') {
 		'void*'
 	} else if base.starts_with('_option_') {
@@ -1134,6 +1136,8 @@ fn (g Gen) result_type_text(styp string, base string) string {
 	// replace void with something else
 	size := if base == 'void' {
 		'u8'
+	} else if base == 'int' {
+		ast.int_type_name
 	} else if base.starts_with('anon_fn') {
 		'void*'
 	} else if base.starts_with('_option_') {

vlib/v/pref/pref.v

@@ -241,6 +241,8 @@ pub mut:
 	// wasm settings:
 	wasm_stack_top int = 1024 + (16 * 1024) // stack size for webassembly backend
 	wasm_validate  bool // validate webassembly code, by calling `wasm-validate`
+	// temp
+	use_64_int bool
 }
 
 pub struct LineInfo {
@@ -407,6 +409,9 @@ pub fn parse_args_and_show_errors(known_external_commands []string, args []strin
 				// processed by testing tools in cmd/tools/modules/testing/common.v
 				continue
 			}
+			'-i64' {
+				res.use_64_int = true
+			}
 			'-Wimpure-v' {
 				res.warn_impure_v = true
 			}