comptime: fix $(field.name) in $for; vweb: shared fields

vlib/builtin/builtin.v

@@ -117,6 +117,7 @@ pub:
 	attrs     []string
 	is_pub    bool
 	is_mut    bool
+	is_shared bool
 	typ       int
 }
 

vlib/v/checker/checker.v

@@ -3973,12 +3973,7 @@ fn (mut c Checker) stmt(node ast.Stmt) {
 			c.branch_stmt(node)
 		}
 		ast.CompFor {
-			typ := c.unwrap_generic(node.typ)
+			c.comp_for(node)
-			sym := c.table.get_type_symbol(typ)
-			if sym.kind == .placeholder || typ.has_flag(.generic) {
-				c.error('unknown type `$sym.name`', node.typ_pos)
-			}
-			c.stmts(node.stmts)
 		}
 		ast.ConstDecl {
 			c.inside_const = true
@@ -4149,6 +4144,18 @@ fn (mut c Checker) for_c_stmt(node ast.ForCStmt) {
 	c.in_for_count--
 }
 
+fn (mut c Checker) comp_for(node ast.CompFor) {
+	typ := c.unwrap_generic(node.typ)
+	sym := c.table.get_type_symbol(typ)
+	if sym.kind == .placeholder || typ.has_flag(.generic) {
+		c.error('unknown type `$sym.name`', node.typ_pos)
+	}
+	if node.kind == .fields {
+		c.comptime_fields_type[node.val_var] = node.typ
+	}
+	c.stmts(node.stmts)
+}
+
 fn (mut c Checker) for_in_stmt(mut node ast.ForInStmt) {
 	c.in_for_count++
 	prev_loop_label := c.loop_label

vlib/v/gen/c/comptime.v

@@ -500,6 +500,7 @@ fn (mut g Gen) comp_for(node ast.CompFor) {
 				g.writeln('\t${node.val_var}.typ = $styp;')
 				g.writeln('\t${node.val_var}.is_pub = $field.is_pub;')
 				g.writeln('\t${node.val_var}.is_mut = $field.is_mut;')
+				g.writeln('\t${node.val_var}.is_shared = ${field.typ.has_flag(.shared_f)};')
 				g.comptime_var_type_map['${node.val_var}.typ'] = styp
 				g.stmts(node.stmts)
 				i++

vlib/vweb/tests/vweb_test_server.v

@@ -12,6 +12,11 @@ struct App {
 	vweb.Context
 	port          int
 	timeout       int
+	global_config shared Config
+}
+
+struct Config {
+	max_ping int
 }
 
 fn exit_after_timeout(timeout_in_ms int) {
@@ -30,9 +35,13 @@ fn main() {
 	assert timeout > 0
 	go exit_after_timeout(timeout)
 	//
+	shared config := &Config{
+		max_ping: 50
+	}
 	app := &App{
 		port: http_port
 		timeout: timeout
+		global_config: config
 	}
 	eprintln('>> webserver: started on http://127.0.0.1:$app.port/ , with maximum runtime of $app.timeout milliseconds.')
 	// vweb.run<App>(mut app, http_port)
@@ -43,6 +52,7 @@ fn main() {
 //}
 
 pub fn (mut app App) index() vweb.Result {
+	assert app.global_config.max_ping == 50
 	return app.text('Welcome to VWeb')
 }
 

vlib/vweb/vweb.v

@@ -324,6 +324,14 @@ pub fn run<T>(global_app &T, port int) {
 		} $else {
 			// println('vweb no db')
 		}
+		$for field in T.fields {
+			// if field.is_shared {
+			// println(field)
+			//}
+			//$if field.typ is string {
+			request_app.$(field.name) = global_app.$(field.name)
+			//}
+		}
 		request_app.Context = global_app.Context // copy the context ref that contains static files map etc
 		// request_app.Context = Context{
 		// conn: 0