From f23753c710d54fdf6f6c6cbe93c5b0fdbf209fc8 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <iant@golang.org>
Date: Mon, 14 Dec 2020 21:26:33 -0800
Subject: [PATCH] compiler: better error for unexpected digit
A digit character is not invalid in general, but it's not permitted
at the start of an identifier. Report a better error message.
The test case is issue11359.go in the source repo.
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/278174
---
gcc/go/gofrontend/MERGE | 2 +-
gcc/go/gofrontend/lex.cc | 7 +++++++
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index 681debb0392d..1bada25300db 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-3e8f49a2137a87fdaba51c3002ddbe41ab18ed46
+8b913a1865e36d4bd105f29aa0b12264a4e03515
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.
diff --git a/gcc/go/gofrontend/lex.cc b/gcc/go/gofrontend/lex.cc
index 156a90c7baf2..e71b8cddf652 100644
--- a/gcc/go/gofrontend/lex.cc
+++ b/gcc/go/gofrontend/lex.cc
@@ -743,6 +743,13 @@ Lex::next_token()
if (Lex::is_unicode_letter(ci))
return this->gather_identifier();
+ if (!issued_error && Lex::is_unicode_digit(ci))
+ {
+ go_error_at(this->location(),
+ "identifier cannot begin with digit");
+ issued_error = true;
+ }
+
if (!issued_error)
go_error_at(this->location(),
"invalid character 0x%x in input file",
--
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