Fixed the way that nested caught exceptions are rethrown, and how value

expressions are displayed when errors are found in them.

src/error.h

@@ -65,7 +65,7 @@ inline string file_context(const path& file, std::size_t line) {
 
 inline string line_context(const string& line, istream_pos_type pos) {
   std::ostringstream buf;
-  buf << "  " << line << std::endl << "  ";
+  buf << "  " << line << "  ";
   istream_pos_type idx = (pos == istream_pos_type(0) ?
 			  istream_pos_type(line.length()) : pos);
   idx -= 1;

src/expr.cc

@@ -96,13 +96,14 @@ void expr_t::parse(const string& _str, const unsigned int flags)
   compiled = false;
 }
 
-void expr_t::parse(std::istream& in, const unsigned int flags)
+void expr_t::parse(std::istream& in, const unsigned int flags,
+		   const string * original_string)
 {
   if (! parser.get())
     throw_(parse_error, "Value expression parser not initialized");
 
   str	   = "<stream>";
-  ptr	   = parser->parse(in, flags);
+  ptr	   = parser->parse(in, flags, original_string);
   compiled = false;
 }
 

src/expr.h

@@ -96,7 +96,8 @@ public:
   }
 
   void     parse(const string& _str, const unsigned int flags = 0);
-  void     parse(std::istream& in, const unsigned int flags = 0);
+  void     parse(std::istream& in, const unsigned int flags = 0,
+		 const string * original_string = NULL);
 	   
   void     compile(scope_t& scope);
   value_t  calc(scope_t& scope);

src/filters.cc

@@ -148,7 +148,7 @@ void calc_xacts::operator()(xact_t& xact)
 #if 0
     add_error_context(xact_context(xact));
 #endif
-    throw err;
+    throw;
   }
 }
 

src/option.cc

@@ -93,7 +93,7 @@ namespace {
 				   (string(" (-") + opt->short_opt + "):") :
 				   ": "));
 #endif
-      throw err;
+      throw;
     }
   }
 }
@@ -133,7 +133,7 @@ void process_environment(const char ** envp, const string& tag,
 	catch (const std::exception& err) {
 	  add_error_context("While parsing environment variable option '"
 			    << *p << "':");
-	  throw err;
+	  throw;
 	}
       }
     }

src/parser.cc

@@ -385,7 +385,8 @@ expr_t::parser_t::parse_value_expr(std::istream& in,
 }
 
 expr_t::ptr_op_t
-expr_t::parser_t::parse(std::istream& in, const flags_t flags)
+expr_t::parser_t::parse(std::istream& in, const flags_t flags,
+			const string * original_string)
 {
   try {
     ptr_op_t top_node = parse_value_expr(in, flags);
@@ -399,11 +400,13 @@ expr_t::parser_t::parse(std::istream& in, const flags_t flags)
     return top_node;
   }
   catch (const std::exception& err) {
-    add_error_context("While parsing value expression:\n");
-#if 0
-    add_error_context(line_context(str, in.tellg() - 1));
-#endif
-    throw err;
+    add_error_context("While parsing value expression:");
+    if (original_string) {
+      istream_pos_type pos = in.tellg();
+      pos -= 1;
+      add_error_context(line_context(*original_string, pos));
+    }
+    throw;
   }
 }
 

src/parser.h

@@ -92,10 +92,11 @@ public:
     TRACE_DTOR(parser_t);
   }
 
-  ptr_op_t parse(std::istream& in, const flags_t flags = EXPR_PARSE_NORMAL);
+  ptr_op_t parse(std::istream& in, const flags_t flags = EXPR_PARSE_NORMAL,
+		 const string * original_string = NULL);
   ptr_op_t parse(string& str, const flags_t flags = EXPR_PARSE_NORMAL) {
     std::istringstream stream(str);
-    return parse(stream, flags);
+    return parse(stream, flags, &str);
   }
 };
 

src/textual.cc

@@ -223,7 +223,7 @@ xact_t * parse_xact(char * line, account_t * account, entry_t * entry = NULL)
     }
     catch (const std::exception& err) {
       add_error_context("While parsing transaction amount:\n");
-      throw err;
+      throw;
     }
   }
 
@@ -270,7 +270,7 @@ xact_t * parse_xact(char * line, account_t * account, entry_t * entry = NULL)
 	}
 	catch (const std::exception& err) {
 	  add_error_context("While parsing transaction cost:\n");
-	  throw err;
+	  throw;
 	}
 
 	if (xact->cost->sign() < 0)
@@ -389,7 +389,7 @@ xact_t * parse_xact(char * line, account_t * account, entry_t * entry = NULL)
 	  }
 	  catch (const std::exception& err) {
 	    add_error_context("While parsing assigned balance:\n");
-	    throw err;
+	    throw;
 	  }
 	}
       }
@@ -434,7 +434,7 @@ xact_t * parse_xact(char * line, account_t * account, entry_t * entry = NULL)
   catch (const std::exception& err) {
     add_error_context("While parsing transaction:\n");
     add_error_context(line_context(line, in.tellg()));
-    throw err;
+    throw;
   }
 }