vweb/checker: show tmpl var errors

vlib/v/checker/checker.v

@@ -1853,6 +1853,10 @@ pub fn (mut c Checker) expr(node ast.Expr) table.Type {
 			if it.is_vweb {
 				mut c2 := new_checker(c.table, c.pref)
 				c2.check(it.vweb_tmpl)
+				c.warnings << c2.warnings
+				c.errors << c2.errors
+				c.nr_warnings += c2.nr_warnings
+				c.nr_errors += c2.nr_errors
 			}
 			return table.void_type
 		}

vlib/v/gen/comptime.v

@@ -18,7 +18,7 @@ fn (g &Gen) comptime_call(node ast.ComptimeCall) {
 				}
 			}
 		}
-		g.writeln('vweb__Context_html(&app->vweb, _tmpl_res)')
+		g.writeln('vweb__Context_html(&app->vweb, tmpl_res_$g.fn_decl.name)')
 		return
 	}
 	g.writeln('// $' + 'method call. sym="$node.sym.name"')

vlib/v/parser/comptime.v

@@ -105,7 +105,7 @@ fn (mut p Parser) vweb() ast.ComptimeCall {
 		start_pos: 0
 		parent: p.global_scope
 	}
-	file := parse_text(v_code, p.table, scope, p.global_scope)
+	file := parse_text(v_code, p.table, p.pref, scope, p.global_scope)
 	if p.pref.is_verbose {
 		println('\n\n')
 		println('>>> vweb template for ${path}:')
@@ -117,12 +117,17 @@ fn (mut p Parser) vweb() ast.ComptimeCall {
 	for stmt in file.stmts {
 		if stmt is ast.FnDecl {
 			fn_decl := stmt as ast.FnDecl
-			if fn_decl.name.starts_with('vweb_tmpl') {
-				body_scope := file.scope.innermost(fn_decl.body_pos.pos)
+			if fn_decl.name == 'vweb_tmpl_$p.cur_fn_name' {
+				tmpl_scope := file.scope.innermost(fn_decl.body_pos.pos)
 				for _, obj in p.scope.objects {
 					if obj is ast.Var {
-						v := obj as ast.Var
-						body_scope.register(v.name, *v)
+						mut v := obj as ast.Var
+						tmpl_scope.register(v.name, *v)
+						// TODO: this is yuck, track idents in parser
+						// or defer unused var logic to checker
+						if v_code.contains(v.name) {
+							v.is_used = true
+						}
 					}
 				}
 				break

vlib/v/parser/parser.v

@@ -75,12 +75,12 @@ pub fn parse_stmt(text string, table &table.Table, scope &ast.Scope) ast.Stmt {
 	return p.stmt()
 }
 
-pub fn parse_text(text string, b_table &table.Table, scope, global_scope &ast.Scope) ast.File {
+pub fn parse_text(text string, b_table &table.Table, pref &pref.Preferences, scope, global_scope &ast.Scope) ast.File {
 	s := scanner.new_scanner(text, .skip_comments)
 	mut p := Parser{
 		scanner: s
 		table: b_table
-		pref: &pref.Preferences{}
+		pref: pref
 		scope: scope
 		errors: []errors.Error{}
 		warnings: []errors.Warning{}

vlib/vweb/tmpl/tmpl.v

@@ -100,7 +100,7 @@ pub fn compile_template(content, fn_name string) string {
 		}
 	}
 	s.writeln(str_end)
-	s.writeln('_tmpl_res := sb.str() ')
+	s.writeln('tmpl_res_$fn_name := sb.str() ')
 	s.writeln('}')
 	s.writeln('// === end of vweb html template ===')
 	return s.str()