.clang-format

# Style configuration for 4C to be used with clang-format
#
# 4C's code style is based on the Google code style. However, we aggreed to deviate
# from it slightly to account enhance readability and to address 4C specifics.

## Define the base style. We use Google's style here.
BasedOnStyle: Google # Use Google style as baseline configuration and specify deviations explicitly as given below

## Define our deviations from the base style. Let's limit ourselves to very few exceptions.
AlignAfterOpenBracket: DontAlign # Align function arguments after line break at custom indentation rather than at the opening (
BreakBeforeBraces: Allman # Always move the opening { to the next line
ColumnLimit: 100 # Break lines after 100 columns/characters
MaxEmptyLinesToKeep: 3 # Max. number of emtpy lines
NamespaceIndentation: All # Add one level of indentation per namespace nesting
SpacesInContainerLiterals: false # Do not insert spaces after and before parenthesis, here []
Standard: c++17 # Use the Cpp17 code style
TabWidth: 2 # Make sure we use our desired tab width

IncludeBlocks: Regroup # group includes
SortIncludes: CaseInsensitive # Sort includes alphabetically
# Sort the includes into different categories
IncludeCategories:
  # gtest and gmock first
  - Regex: "gtest/gtest.h"
    Priority: -3
  - Regex: "gmock/gmock.h"
    Priority: -2

  # make sure to include config headers before other 4C headers:
  - Regex: "4C_config.*.hpp"
    Priority: -1

  # the header associated with a cpp file has priority zero and would come here

  # try to group 4C headers:
  - Regex: "4C_.*\\.(h|H|hpp)"
    Priority: 10

  # try to catch all third party headers and put them after 4C but before
  # standard headers:
  - Regex: "<.*\\.(h|hpp|hxx)>"
    Priority: 1000

  # match all standard headers
  - Regex: "<[a-z_]+>"
    Priority: 100000