From b15958c557d3b29c8d4cee9951a8bfd30c215482 Mon Sep 17 00:00:00 2001
From: Vexu <git@vexu.eu>
Date: Fri, 14 Feb 2020 23:41:18 +0200
Subject: [PATCH] fix c tokenizer bug

---
 lib/std/c/tokenizer.zig | 2 ++
 test/translate_c.zig    | 7 +++++++
 2 files changed, 9 insertions(+)

diff --git a/lib/std/c/tokenizer.zig b/lib/std/c/tokenizer.zig
index 66e6d9d52d..c3f50da13d 100644
--- a/lib/std/c/tokenizer.zig
+++ b/lib/std/c/tokenizer.zig
@@ -616,6 +616,7 @@ pub const Tokenizer = struct {
                 },
                 .BackSlash => switch (c) {
                     '\n' => {
+                        result.start = self.index + 1;
                         state = .Start;
                     },
                     '\r' => {
@@ -631,6 +632,7 @@ pub const Tokenizer = struct {
                 },
                 .BackSlashCr => switch (c) {
                     '\n' => {
+                        result.start = self.index + 1;
                         state = .Start;
                     },
                     else => {
diff --git a/test/translate_c.zig b/test/translate_c.zig
index bb2a310b0f..b69142e864 100644
--- a/test/translate_c.zig
+++ b/test/translate_c.zig
@@ -3,6 +3,13 @@ const builtin = @import("builtin");
 const Target = @import("std").Target;
 
 pub fn addCases(cases: *tests.TranslateCContext) void {
+    cases.add("macro line continuation",
+        \\#define FOO -\
+        \\BAR
+    , &[_][]const u8{
+        \\pub const FOO = -BAR;
+    });
+
     cases.add("function prototype translated as optional",
         \\typedef void (*fnptr_ty)(void);
         \\typedef __attribute__((cdecl)) void (*fnptr_attr_ty)(void);