diff options
Diffstat (limited to 'src/libutil/error.cc')
| -rw-r--r-- | src/libutil/error.cc | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/libutil/error.cc b/src/libutil/error.cc index 539a7543f..1fcb8111c 100644 --- a/src/libutil/error.cc +++ b/src/libutil/error.cc @@ -10,13 +10,16 @@ namespace nix { const std::string nativeSystem = SYSTEM; - +// addPrefix is used for show-trace. Strings added with addPrefix +// will print ahead of the error itself. BaseError & BaseError::addPrefix(const FormatOrString & fs) { prefix_ = fs.s + prefix_; return *this; } +// c++ std::exception descendants must have a 'const char* what()' function. +// This stringifies the error and caches it for use by what(), or similarly by msg(). const string& BaseError::calcWhat() const { if (what_.has_value()) @@ -53,6 +56,7 @@ string showErrPos(const ErrPos &errPos) } } +// if nixCode contains lines of code, print them to the ostream, indicating the error column. void printCodeLines(std::ostream &out, const string &prefix, const NixCode &nixCode) { // previous line of code. |