implode: Better invalid input validation and handling

Error on non-number and nan codepoint, would asserd before
Replace negative codepoint and surrogate range with unicode replacement character, would assert before

Fixes #1160

1 files changed, 1 insertions, 0 deletions

diff --git a/src/jv.h b/src/jv.h
index 8c96f822..446ffb06 100644
--- a/src/jv.h
+++ b/src/jv.h
@@ -63,6 +63,7 @@ jv jv_number(double);
 jv jv_number_with_literal(const char*);
 double jv_number_value(jv);
 int jv_is_integer(jv);
+int jvp_number_is_nan(jv);
 
 int jv_number_has_literal(jv n);
 const char* jv_number_get_literal(jv);