fix V.js methods after the recent generics fix

vlib/compiler/cc.v

@@ -19,13 +19,17 @@ fn (v mut V) cc() {
 	// Just create a C/JavaScript file and exit
 	// for example: `v -o v.c compiler`
 	if v.out_name.ends_with('.c') || v.out_name.ends_with('.js') {
-		// Translating V code to JS by launching vjs
+		// Translating V code to JS by launching vjs.
+		// Using a separate process for V.js is for performance mostly,
+		// to avoid constant is_js checks.
 		$if !js {
 			if v.out_name.ends_with('.js') {
 				vjs_path := vexe + 'js'
 				dir := os.dir(vexe)
 				if !os.file_exists(vjs_path) {
 					println('V.js compiler not found, building...')
+					// Build V.js. Specifying `-os js` makes V include
+					// only _js.v files and ignore _c.v files.
 					ret := os.system('$vexe -o $vjs_path -os js $dir/v.v')
 					if ret == 0 {
 						println('Done.')

vlib/compiler/fn.v

@@ -721,14 +721,13 @@ fn (p mut Parser) fn_call(f mut Fn, method_ph int, receiver_var, receiver_type s
 		if !p.expr_var.is_changed {
 			p.mark_var_changed(p.expr_var)
 		}
-		met_call := p.gen_method_call(receiver, receiver_type, cgen_name, f.typ)
-		p.cgen.set_placeholder(method_ph, met_call)
+		p.gen_method_call(receiver, receiver_type, cgen_name, f.typ, method_ph)
 	} else {
 		// Normal function call
 		p.gen('$cgen_name (')
 	}
 	
-	// foo<Bar>()
+	// `foo<Bar>()`
 	// if f is generic, the name is changed to a suitable instance in dispatch_generic_fn_instance()
 	// we then replace `cgen_name` with the instance's name
 	generic := f.is_generic

vlib/compiler/gen_c.v

@@ -247,7 +247,9 @@ fn (table mut Table) fn_gen_name(f &Fn) string {
 	return name
 }
 
-fn (p mut Parser) gen_method_call(receiver &Var, receiver_type string, cgen_name string, ftyp string) string {
+fn (p mut Parser) gen_method_call(receiver &Var, receiver_type string,
+	cgen_name string, ftyp string, method_ph int)
+{
 	//mut cgen_name := p.table.fn_gen_name(f)
 	mut method_call := cgen_name + ' ('
 	// if receiver is key_mut or a ref (&), generate & for the first arg
@@ -270,7 +272,7 @@ fn (p mut Parser) gen_method_call(receiver &Var, receiver_type string, cgen_name
 			cast = '(voidptr) '
 		}
 	}
-	return '$cast $method_call'
+	p.cgen.set_placeholder(method_ph, '$cast $method_call')
 }
 
 fn (p mut Parser) gen_array_at(typ_ string, is_arr0 bool, fn_ph int) {

vlib/compiler/gen_js.v

@@ -91,9 +91,13 @@ fn (table &Table) fn_gen_name(f &Fn) string {
 	return name
 }
 
-fn (p mut Parser) gen_method_call(receiver_type, ftyp string,
-	cgen_name string, receiver Var,method_ph int)
+//fn (p mut Parser) gen_method_call(receiver &Var, receiver_type string,
+	//ftyp string,	cgen_name string, receiver Var,method_ph int)
+fn (p mut Parser) gen_method_call(receiver &Var, receiver_type string,
+	cgen_name string, ftyp string, method_ph int)
 {
+	// TODO  js methods have been broken from the start
+	
 	//mut cgen_name := p.table.fn_gen_name(f)
 	//mut method_call := cgen_name + '('
 	p.gen('.' + cgen_name.all_after('_') + '(')