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+# Logging macros
+
+Additional messages can be logged during a test case.
+
+## Streaming macros
+
+All these macros allow heterogenous sequences of values to be streaming using the insertion operator (```<<```) in the same way that std::ostream, std::cout, etc support it.
+
+E.g.:
+```c++
+INFO( "The number is " << i );
+```
+
+(Note that there is no initial ```<<``` - instead the insertion sequence is placed in parentheses.)
+These macros come in three forms:
+
+**INFO(** _message expression_ **)**
+
+The message is logged to a buffer, but only reported with the next assertion that is logged. This allows you to log contextual information in case of failures which is not shown during a successful test run (for the console reporter, without -s). Messages are removed from the buffer at the end of their scope, so may be used, for example, in loops.
+
+**WARN(** _message expression_ **)**
+
+The message is always reported but does not fail the test.
+
+**FAIL(** _message expression_ **)**
+
+The message is reported and the test case fails.
+
+## Quickly capture a variable value
+
+**CAPTURE(** _expression_ **)**
+
+Sometimes you just want to log the name and value of a variable. While you can easily do this with the INFO macro, above, as a convenience the CAPTURE macro handles the stringising of the variable name for you (actually it works with any expression, not just variables).
+
+E.g.
+```c++
+CAPTURE( theAnswer );
+```
+
+This would log something like:
+
+<pre>"theAnswer := 42"</pre>
+
+## Deprecated macros
+
+**SCOPED_INFO and SCOPED_CAPTURE**
+
+These macros are now deprecated and are just aliases for INFO and CAPTURE (which were not previously scoped).
+
+---
+
+[Home](Readme.md)
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