In order to allow for printing (at least) also warnings, rename
__stmt_binary_error to __stmt_binary_msg and pass the severity as first
parameter. Then create __stmt_binary_error macro to reestablish the old
signature.

Finally, add similar macros for printing warnings. And since these are
supposed to be non-fatal, make __stmt_binary_msg return 0 if a severity
below EREC_ERROR was given. This allows to still use it in return
statements.

Signed-off-by: Phil Sutter <[email protected]>
---
 include/erec.h | 16 ++++++++++++----
 src/erec.c     | 13 +++++++------
 2 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/include/erec.h b/include/erec.h
index 36e0efa4fc1d9..0babfc0ff488c 100644
--- a/include/erec.h
+++ b/include/erec.h
@@ -63,11 +63,19 @@ extern void erec_print_list(FILE *f, struct list_head 
*list);
 
 struct eval_ctx;
 
-extern int __fmtstring(4, 5) __stmt_binary_error(struct eval_ctx *ctx,
-                                                const struct location *l1,
-                                                const struct location *l2,
-                                                const char *fmt, ...);
+extern int __fmtstring(5, 6) __stmt_binary_msg(enum error_record_types type,
+                                              struct eval_ctx *ctx,
+                                              const struct location *l1,
+                                              const struct location *l2,
+                                              const char *fmt, ...);
 
+#define __stmt_binary_warning(ctx, l1, l2, fmt, args...) \
+       __stmt_binary_msg(EREC_WARNING, ctx, l1, l2, fmt, ## args)
+#define stmt_warning(ctx, s1, fmt, args...) \
+       __stmt_binary_warning(ctx, &(s1)->location, NULL, fmt, ## args)
+
+#define __stmt_binary_error(ctx, l1, l2, fmt, args...) \
+       __stmt_binary_msg(EREC_ERROR, ctx, l1, l2, fmt, ## args)
 #define stmt_error(ctx, s1, fmt, args...) \
        __stmt_binary_error(ctx, &(s1)->location, NULL, fmt, ## args)
 #define stmt_binary_error(ctx, s1, s2, fmt, args...) \
diff --git a/src/erec.c b/src/erec.c
index eacdd97a21cbc..7b9c2420d416c 100644
--- a/src/erec.c
+++ b/src/erec.c
@@ -208,19 +208,20 @@ void erec_print_list(FILE *f, struct list_head *list)
        }
 }
 
-int __fmtstring(4, 5) __stmt_binary_error(struct eval_ctx *ctx,
-                                         const struct location *l1,
-                                         const struct location *l2,
-                                         const char *fmt, ...)
+int __fmtstring(5, 6) __stmt_binary_msg(enum error_record_types type,
+                                       struct eval_ctx *ctx,
+                                       const struct location *l1,
+                                       const struct location *l2,
+                                       const char *fmt, ...)
 {
        struct error_record *erec;
        va_list ap;
 
        va_start(ap, fmt);
-       erec = erec_vcreate(EREC_ERROR, l1, fmt, ap);
+       erec = erec_vcreate(type, l1, fmt, ap);
        if (l2 != NULL)
                erec_add_location(erec, l2);
        va_end(ap);
        erec_queue(erec, ctx->msgs);
-       return -1;
+       return type >= EREC_ERROR ? -1 : 0;
 }
-- 
2.11.0

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