Rui Ueyama 22d38b0d4a Improve raw_ostream so that you can "write" colors using operator<< ...

1. raw_ostream supports ANSI colors so that you can write messages to
the termina with colors. Previously, in order to change and reset
color, you had to call `changeColor` and `resetColor` functions,
respectively.

So, if you print out "error: " in red, for example, you had to do
something like this:

  OS.changeColor(raw_ostream::RED);
  OS << "error: ";
  OS.resetColor();

With this patch, you can write the same code as follows:

  OS << raw_ostream::RED << "error: " << raw_ostream::RESET;

2. Add a boolean flag to raw_ostream so that you can disable colored
output. If you disable colors, changeColor, operator<<(Color),
resetColor and other color-related functions have no effect.

Most LLVM tools automatically prints out messages using colors, and
you can disable it by passing a flag such as `--disable-colors`.
This new flag makes it easy to write code that works that way.

Differential Revision: https://reviews.llvm.org/D65564

llvm-svn: 367649

2019-08-02 04:48:30 +00:00

..

CMakeLists.txt

[CMake] Use PRIVATE in target_link_libraries for executables

2017-12-05 21:49:56 +00:00

FileCheck.cpp

Improve raw_ostream so that you can "write" colors using operator<<

2019-08-02 04:48:30 +00:00