Handle trailing spaces on "settings set" command more correctly

Summary:
Currently we have some settings which treat "\ " on settings set commands specially. E.g., it is
a valid way of specifying an argument of " " to a target. However, this fails if "\ " is the last
argument as CommandObjectSettingsSet strips trailing whitespace. This resulted in a surprising
argument of "\" to the target.

This patch disables the training whitespace removal at a global
level. Instead, for each argument type we locally determine whether whitespace stripping makes
sense. Currently, I strip whitespace for all simple object type except of regex and
format-string, with the rationale that these two object types do their own complex parsing and we
want to interfere with them as least as possible. Specifically, stripping the whitespace of a
regex "\ " will result in a (surprising?) error "trailing backslash". Furthermore, the default
value of dissasembly-format setting already contains a trailing space and there is no way for the
user to type this in manually if we strip whitespace.

Reviewers: clayborg, zturner

Subscribers: lldb-commits

Differential Revision: http://reviews.llvm.org/D7592

llvm-svn: 229382

1 files changed, 2 insertions, 1 deletions

diff --git a/lldb/source/Interpreter/OptionValueSInt64.cpp b/lldb/source/Interpreter/OptionValueSInt64.cpp
index c69172921a6..d62353d93d4 100644
--- a/lldb/source/Interpreter/OptionValueSInt64.cpp
+++ b/lldb/source/Interpreter/OptionValueSInt64.cpp
@@ -51,7 +51,8 @@ OptionValueSInt64::SetValueFromCString (const char *value_cstr, VarSetOperationT
         case eVarSetOperationAssign:
             {
                 bool success = false;
-                int64_t value = StringConvert::ToSInt64 (value_cstr, 0, 0, &success);
+                std::string value_str = llvm::StringRef(value_cstr).trim().str();
+                int64_t value = StringConvert::ToSInt64 (value_str.c_str(), 0, 0, &success);
                 if (success)
                 {
                     if (value >= m_min_value && value <= m_max_value)