tor/.clang-format

# DO NOT COMMIT OR MERGE CODE THAT IS RUN THROUGH THIS TOOL YET.
#
# WE ARE STILL DISCUSSING OUR DESIRED STYLE AND ITERATING ON IT.
#     (12 Feb 2020)

---
Language:        Cpp
# Out of all supported styles, LLVM seems closest to our own.
BasedOnStyle:    LLVM

################
#
# Deviations from LLVM's style.
#
################

# We prefer an indentation width of 4 columns; LLVM likes 2.
## OVERRIDE FOR COMPARISON
IndentWidth:     2

## OVERRIDE FOR COMPARISON
## for now i'm not sorting includes, since that makes every file get touched.
SortIncludes: false

# We prefer 79; llvm likes 80.
ColumnLimit: 79

# Where do we want to put backslashes on multiline macros?  Our choices are
# "as far left as possible", "as far right as possible", and "make no changes."
# LLVM defaults to right, but we don't dig that.
AlignEscapedNewlines: Left

# When we see a bunch of things in a row with comments after them, should we
# try to align those comments?  Doing so makes some of our code pretty ugly.
AlignTrailingComments: false

# We use a function declaration style much closer to BSD KNF than to LLVM's.
# We say:
#      int foo(int x);
#      int
#      foo(int x)
#      {
#          ...
#      }
# whereas llvm prefers:
#      int foo(int x);
#      int foo(int x) {
#          ...
#      }
# or even:
#      int foo(int x) { ... }
#
BreakBeforeBraces: Custom
BraceWrapping:
  AfterFunction:   true
AllowShortFunctionsOnASingleLine: None
AlwaysBreakAfterReturnType: AllDefinitions

# We don't like blocks to start with an empty line.
#
KeepEmptyLinesAtTheStartOfBlocks: false

################
#
# Tor-specific magic
#
################

#
# These comments are magical, and should not be changed.
#
CommentPragmas:  'LCOV_EXCL|COVERITY'

#
# Remove duplicate empty lines.
#
MaxEmptyLinesToKeep: 1

#
# Indent preprocessor directives, for clarity.
#
IndentPPDirectives: AfterHash

#
# These introduce an iteration, and work a bit like a for loop.
#
# Note that we can NOT include ones that don't work like "for".  For example,
# if the body is an argument to the macro, we can't list it here.
#
ForEachMacros:
  - MAP_FOREACH
  - MAP_FOREACH_MODIFY
  - TOR_SIMPLEQ_FOREACH
  - TOR_SIMPLEQ_FOREACH_SAFE
  - TOR_SLIST_FOREACH
  - TOR_SLIST_FOREACH_SAFE
  - TOR_LIST_FOREACH
  - TOR_LIST_FOREACH_SAFE
  - TOR_TAILQ_FOREACH
  - TOR_TAILQ_FOREACH_SAFE
  - TOR_TAILQ_FOREACH_REVERSE
  - TOR_TAILQ_FOREACH_REVERSE_SAFE
  - TOR_CIRCLEQ_FOREACH
  - TOR_CIRCLEQ_FOREACH_SAFE
  - TOR_CIRCLEQ_FOREACH_REVERSE
  - TOR_CIRCLEQ_FOREACH_REVERSE_SAFE
  - HT_FOREACH
  - SMARTLIST_FOREACH_BEGIN
  - DIGESTMAP_FOREACH
  - DIGESTMAP_FOREACH_MODIFY
  - DIGEST256MAP_FOREACH
  - DIGEST256MAP_FOREACH_MODIFY
  - SDMAP_FOREACH
  - RIMAP_FOREACH
  - EIMAP_FOREACH

#
# Omitting:
#
# - SMARTLIST_FOREACH, since the body of the loop is an argument.

#
# This explains how to sort our headers.
#
# This is more complex than it truly should be, but I've edited this till
# compilation still mostly passes.
#
# I'm disabling this, however, since it's a distraction from the other
# formatting issues. See SortIncludes above.
#
IncludeCategories:
  - Regex:           '^"orconfig.h'
    Priority:        -30
  - Regex:           '^"ext/'
    Priority:        -18
  - Regex:           '^"lib/'
    Priority:        -10
  - Regex:           '^"core/or/or.h'
    Priority:        -5
  - Regex:           '^"core/'
    Priority:        5
  - Regex:           '^"feature/'
    Priority:        10
  - Regex:           '^"app/'
    Priority:        20

#
# These macros should always cause indentation, as though they were { and }.
#
# Do NOT put macros here unless you want an extra level of indentation between
# them whenever they appear.
#
MacroBlockBegin: "^STMT_BEGIN|TT_STMT_BEGIN$"
MacroBlockEnd:   "^STMT_END|TT_STMT_END$"

#
# These macros are interpreted as types.
# (Not supported in my clang-format)
#
# TypenameMacros:
#    - "STACK_OF"

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