parser: silent mode fixes (#7286)

vlib/v/checker/checker.v

@@ -3565,6 +3565,10 @@ fn (mut c Checker) match_exprs(mut node ast.MatchExpr, type_sym table.TypeSymbol
 			}
 			c.expected_type = node.cond_type
 			expr_type := c.expr(expr)
+			if expr_type.idx() == 0 {
+				// parser failed, stop checking
+				return
+			}
 			if cond_type_sym.kind == .interface_ {
 				// TODO
 				// This generates a memory issue with TCC

vlib/v/parser/if_match.v

@@ -173,7 +173,7 @@ fn (mut p Parser) match_expr() ast.MatchExpr {
 			p.next()
 		} else if p.tok.kind == .name && !(p.tok.lit == 'C' &&
 			p.peek_tok.kind == .dot) && (p.tok.lit in table.builtin_type_names || p.tok.lit[0].is_capital() ||
-			(p.peek_tok.kind == .dot && p.peek_tok2.lit[0].is_capital())) {
+			(p.peek_tok.kind == .dot && p.peek_tok2.lit.len > 0 && p.peek_tok2.lit[0].is_capital())) {
 			mut types := []table.Type{}
 			for {
 				// Sum type match

vlib/v/parser/parse_type.v

@@ -48,6 +48,10 @@ pub fn (mut p Parser) parse_map_type() table.Type {
 	}
 	p.check(.lsbr)
 	key_type := p.parse_type()
+	if key_type.idx() == 0 {
+		// error is reported in parse_type
+		return 0
+	}
 	// key_type_sym := p.get_type_symbol(key_type)
 	// if key_type_sym.kind != .string {
 	if key_type.idx() != table.string_type_idx {
@@ -56,6 +60,10 @@ pub fn (mut p Parser) parse_map_type() table.Type {
 	}
 	p.check(.rsbr)
 	value_type := p.parse_type()
+	if value_type.idx() == 0 {
+		// error is reported in parse_type
+		return 0
+	}
 	idx := p.table.find_or_register_map(key_type, value_type)
 	return table.new_type(idx)
 }
@@ -78,6 +86,9 @@ pub fn (mut p Parser) parse_multi_return_type() table.Type {
 	mut mr_types := []table.Type{}
 	for p.tok.kind != .eof {
 		mr_type := p.parse_type()
+		if mr_type.idx() == 0 {
+			break
+		}
 		mr_types << mr_type
 		if p.tok.kind == .comma {
 			p.next()

vlib/v/parser/parser.v

@@ -1021,14 +1021,10 @@ pub fn (mut p Parser) parse_ident(language table.Language) ast.Ident {
 			}
 			scope: p.scope
 		}
-	} else {
-		p.error('unexpected token `$p.tok.lit`')
-		return ast.Ident{
-			scope: 0
-		}
 	}
+	p.error('unexpected token `$p.tok.lit`')
 	return ast.Ident{
-		scope: 0
+		scope: p.scope
 	}
 }