Add text to the help to explain how to set user defined variables.
git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@166704 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Commands/CommandObjectExpression.cpp b/source/Commands/CommandObjectExpression.cpp
index ee05360..a93d4e6 100644
--- a/source/Commands/CommandObjectExpression.cpp
+++ b/source/Commands/CommandObjectExpression.cpp
@@ -164,7 +164,7 @@
CommandObjectExpression::CommandObjectExpression (CommandInterpreter &interpreter) :
CommandObjectRaw (interpreter,
"expression",
- "Evaluate a C/ObjC/C++ expression in the current program context, using variables currently in scope.",
+ "Evaluate a C/ObjC/C++ expression in the current program context, using user defined variables and variables currently in scope.",
NULL,
eFlagProcessMustBePaused),
m_option_group (interpreter),
@@ -180,10 +180,18 @@
currently .25 seconds. If it doesn't return in that time, the evaluation will be interrupted\n\
and resumed with all threads running. You can use the -a option to disable retrying on all\n\
threads. You can use the -t option to set a shorter timeout.\n\
+\n\
+User defined variables:\n\
+ You can define your own variables for convenience or to be used in subsequent expressions.\n\
+ You define them the same way you would define variables in C. If the first character of \n\
+ your user defined variable is a $, then the variable's value will be available in future\n\
+ expressions, otherwise it will just be available in the current expression.\n\
+\n\
Examples: \n\
\n\
expr my_struct->a = my_array[3] \n\
expr -f bin -- (index * 8) + 5 \n\
+ expr unsigned int $foo = 5\n\
expr char c[] = \"foo\"; c[0]\n");
CommandArgumentEntry arg;