40b7eafacdb27705e6f92636f8066a86c2be1c02
kent
  Sat Aug 17 10:55:43 2019 -0700
Adding warnHandler and abortHandler arguments to strexEvalAsString in preparation for implementing warn() and error() constructs.

diff --git src/inc/strex.h src/inc/strex.h
index 403700d..f0c9703 100644
--- src/inc/strex.h
+++ src/inc/strex.h
@@ -14,21 +14,25 @@
     void *symbols, StrexLookup lookup);
 /* Parse out string expression in s and return root of tree. The fileName and 
  * fileLineNumber are just used in the error message.  Ideally they should help 
  * the user navigate to where the problem was. 
  *    If symbols is non-null then it and lookup will be used together to complain
  *    about missing variables rather than just generating empty strings when 
  *    they are referenced. */
 
 struct strexParse *strexParseFile(char *fileName, void *symbols, StrexLookup lookup);
 /* Similar to strexParseString, but get input from a file rather than a string */
 
 void strexParseDump(struct strexParse *p, int depth, FILE *f);
 /* Dump out strexParse tree and children for debugging.  Usual depth is 0. */
 
 /* Evaluating a parsed out strex expression */
-char *strexEvalAsString(struct strexParse *p, void *symbols, StrexLookup lookup);
+
+char *strexEvalAsString(struct strexParse *p, void *symbols, StrexLookup lookup,
+    void (*warnHandler)(char *warning), void (*abortHandler)() );
 /* Evaluating a strex expression on a symbol table with a lookup function for variables and
- * return result as a string value. */
+ * return result as a string value.  The warnHandler and abortHandler are optional,
+ * and can be used to wrap your own warnings and abort processing onto what strex
+ * provides.  For default behavior just pass in NULL. */
 
 #endif /* STREX_H */