tools/warn/cpp_warn_patterns.py

# python3
# Copyright (C) 2019 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""Warning patterns for C/C++ compiler, but not clang-tidy."""

import re

# pylint:disable=relative-beyond-top-level
# pylint:disable=g-importing-member
from .severity import Severity


warn_patterns = [
    # pylint:disable=line-too-long,g-inconsistent-quotes
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wimplicit-function-declaration',
     'description': 'Implicit function declaration',
     'patterns': [r".*: warning: implicit declaration of function .+",
                  r".*: warning: implicitly declaring library function"]},
    {'category': 'C/C++', 'severity': Severity.SKIP,
     'description': 'skip, conflicting types for ...',
     'patterns': [r".*: warning: conflicting types for '.+'"]},
    {'category': 'C/C++', 'severity': Severity.HIGH, 'option': '-Wtype-limits',
     'description': 'Expression always evaluates to true or false',
     'patterns': [r".*: warning: comparison is always .+ due to limited range of data type",
                  r".*: warning: comparison of unsigned .*expression .+ is always true",
                  r".*: warning: comparison of unsigned .*expression .+ is always false"]},
    {'category': 'C/C++', 'severity': Severity.HIGH,
     'description': 'Use transient memory for control value',
     'patterns': [r".*: warning: .+Using such transient memory for the control value is .*dangerous."]},
    {'category': 'C/C++', 'severity': Severity.HIGH,
     'description': 'Return address of stack memory',
     'patterns': [r".*: warning: Address of stack memory .+ returned to caller",
                  r".*: warning: Address of stack memory .+ will be a dangling reference"]},
    {'category': 'C/C++', 'severity': Severity.HIGH, 'option': 'infinite-recursion',
     'description': 'Infinite recursion',
     'patterns': [r".*: warning: all paths through this function will call itself"]},
    {'category': 'C/C++', 'severity': Severity.HIGH,
     'description': 'Potential buffer overflow',
     'patterns': [r".*: warning: Size argument is greater than .+ the destination buffer",
                  r".*: warning: Potential buffer overflow.",
                  r".*: warning: String copy function overflows destination buffer"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Incompatible pointer types',
     'patterns': [r".*: warning: assignment from incompatible pointer type",
                  r".*: warning: return from incompatible pointer type",
                  r".*: warning: passing argument [0-9]+ of '.*' from incompatible pointer type",
                  r".*: warning: initialization from incompatible pointer type"]},
    {'category': 'C/C++', 'severity': Severity.HIGH, 'option': '-fno-builtin',
     'description': 'Incompatible declaration of built in function',
     'patterns': [r".*: warning: incompatible implicit declaration of built-in function .+"]},
    {'category': 'C/C++', 'severity': Severity.HIGH, 'option': '-Wincompatible-library-redeclaration',
     'description': 'Incompatible redeclaration of library function',
     'patterns': [r".*: warning: incompatible redeclaration of library function .+"]},
    {'category': 'C/C++', 'severity': Severity.HIGH,
     'description': 'Null passed as non-null argument',
     'patterns': [r".*: warning: Null passed to a callee that requires a non-null"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wunused-parameter',
     'description': 'Unused parameter',
     'patterns': [r".*: warning: unused parameter '.*'"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wunused',
     'description': 'Unused function, variable, label, comparison, etc.',
     'patterns': [r".*: warning: '.+' defined but not used",
                  r".*: warning: unused function '.+'",
                  r".*: warning: unused label '.+'",
                  r".*: warning: relational comparison result unused",
                  r".*: warning: lambda capture .* is not used",
                  r".*: warning: private field '.+' is not used",
                  r".*: warning: unused variable '.+'"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wunused-value',
     'description': 'Statement with no effect or result unused',
     'patterns': [r".*: warning: statement with no effect",
                  r".*: warning: expression result unused"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wunused-result',
     'description': 'Ignoreing return value of function',
     'patterns': [r".*: warning: ignoring return value of function .+Wunused-result"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wmissing-field-initializers',
     'description': 'Missing initializer',
     'patterns': [r".*: warning: missing initializer"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wdelete-non-virtual-dtor',
     'description': 'Need virtual destructor',
     'patterns': [r".*: warning: delete called .* has virtual functions but non-virtual destructor"]},
    {'category': 'cont.', 'severity': Severity.SKIP,
     'description': 'skip, near initialization for ...',
     'patterns': [r".*: warning: \(near initialization for '.+'\)"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wdate-time',
     'description': 'Expansion of data or time macro',
     'patterns': [r".*: warning: expansion of date or time macro is not reproducible"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wexpansion-to-defined',
     'description': 'Macro expansion has undefined behavior',
     'patterns': [r".*: warning: macro expansion .* has undefined behavior"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wformat',
     'description': 'Format string does not match arguments',
     'patterns': [r".*: warning: format '.+' expects type '.+', but argument [0-9]+ has type '.+'",
                  r".*: warning: more '%' conversions than data arguments",
                  r".*: warning: data argument not used by format string",
                  r".*: warning: incomplete format specifier",
                  r".*: warning: unknown conversion type .* in format",
                  r".*: warning: format .+ expects .+ but argument .+Wformat=",
                  r".*: warning: field precision should have .+ but argument has .+Wformat",
                  r".*: warning: format specifies type .+ but the argument has .*type .+Wformat"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wformat-extra-args',
     'description': 'Too many arguments for format string',
     'patterns': [r".*: warning: too many arguments for format"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Too many arguments in call',
     'patterns': [r".*: warning: too many arguments in call to "]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wformat-invalid-specifier',
     'description': 'Invalid format specifier',
     'patterns': [r".*: warning: invalid .+ specifier '.+'.+format-invalid-specifier"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wsign-compare',
     'description': 'Comparison between signed and unsigned',
     'patterns': [r".*: warning: comparison between signed and unsigned",
                  r".*: warning: comparison of promoted \~unsigned with unsigned",
                  r".*: warning: signed and unsigned type in conditional expression"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Comparison between enum and non-enum',
     'patterns': [r".*: warning: enumeral and non-enumeral type in conditional expression"]},
    {'category': 'libpng', 'severity': Severity.MEDIUM,
     'description': 'libpng: zero area',
     'patterns': [r".*libpng warning: Ignoring attempt to set cHRM RGB triangle with zero area"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wmissing-braces',
     'description': 'Missing braces around initializer',
     'patterns': [r".*: warning: missing braces around initializer.*"]},
    {'category': 'C/C++', 'severity': Severity.HARMLESS,
     'description': 'No newline at end of file',
     'patterns': [r".*: warning: no newline at end of file"]},
    {'category': 'C/C++', 'severity': Severity.HARMLESS,
     'description': 'Missing space after macro name',
     'patterns': [r".*: warning: missing whitespace after the macro name"]},
    {'category': 'C/C++', 'severity': Severity.LOW, 'option': '-Wcast-align',
     'description': 'Cast increases required alignment',
     'patterns': [r".*: warning: cast from .* to .* increases required alignment .*"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wcast-qual',
     'description': 'Qualifier discarded',
     'patterns': [r".*: warning: passing argument [0-9]+ of '.+' discards qualifiers from pointer target type",
                  r".*: warning: assignment discards qualifiers from pointer target type",
                  r".*: warning: passing .+ to parameter of type .+ discards qualifiers",
                  r".*: warning: assigning to .+ from .+ discards qualifiers",
                  r".*: warning: initializing .+ discards qualifiers .+types-discards-qualifiers",
                  r".*: warning: return discards qualifiers from pointer target type"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wunknown-attributes',
     'description': 'Unknown attribute',
     'patterns': [r".*: warning: unknown attribute '.+'"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wignored-attributes',
     'description': 'Attribute ignored',
     'patterns': [r".*: warning: '_*packed_*' attribute ignored",
                  r".*: warning: attribute declaration must precede definition .+ignored-attributes"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wvisibility',
     'description': 'Visibility problem',
     'patterns': [r".*: warning: declaration of '.+' will not be visible outside of this function"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wattributes',
     'description': 'Visibility mismatch',
     'patterns': [r".*: warning: '.+' declared with greater visibility than the type of its field '.+'"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Shift count greater than width of type',
     'patterns': [r".*: warning: (left|right) shift count >= width of type"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wextern-initializer',
     'description': 'extern <foo> is initialized',
     'patterns': [r".*: warning: '.+' initialized and declared 'extern'",
                  r".*: warning: 'extern' variable has an initializer"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wold-style-declaration',
     'description': 'Old style declaration',
     'patterns': [r".*: warning: 'static' is not at beginning of declaration"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wreturn-type',
     'description': 'Missing return value',
     'patterns': [r".*: warning: control reaches end of non-void function"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wimplicit-int',
     'description': 'Implicit int type',
     'patterns': [r".*: warning: type specifier missing, defaults to 'int'",
                  r".*: warning: type defaults to 'int' in declaration of '.+'"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wmain-return-type',
     'description': 'Main function should return int',
     'patterns': [r".*: warning: return type of 'main' is not 'int'"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wuninitialized',
     'description': 'Variable may be used uninitialized',
     'patterns': [r".*: warning: '.+' may be used uninitialized in this function"]},
    {'category': 'C/C++', 'severity': Severity.HIGH, 'option': '-Wuninitialized',
     'description': 'Variable is used uninitialized',
     'patterns': [r".*: warning: '.+' is used uninitialized in this function",
                  r".*: warning: variable '.+' is uninitialized when used here"]},
    {'category': 'ld', 'severity': Severity.MEDIUM, 'option': '-fshort-enums',
     'description': 'ld: possible enum size mismatch',
     'patterns': [r".*: warning: .* uses variable-size enums yet the output is to use 32-bit enums; use of enum values across objects may fail"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wpointer-sign',
     'description': 'Pointer targets differ in signedness',
     'patterns': [r".*: warning: pointer targets in initialization differ in signedness",
                  r".*: warning: pointer targets in assignment differ in signedness",
                  r".*: warning: pointer targets in return differ in signedness",
                  r".*: warning: pointer targets in passing argument [0-9]+ of '.+' differ in signedness"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wstrict-overflow',
     'description': 'Assuming overflow does not occur',
     'patterns': [r".*: warning: assuming signed overflow does not occur when assuming that .* is always (true|false)"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wempty-body',
     'description': 'Suggest adding braces around empty body',
     'patterns': [r".*: warning: suggest braces around empty body in an 'if' statement",
                  r".*: warning: empty body in an if-statement",
                  r".*: warning: suggest braces around empty body in an 'else' statement",
                  r".*: warning: empty body in an else-statement"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wparentheses',
     'description': 'Suggest adding parentheses',
     'patterns': [r".*: warning: suggest explicit braces to avoid ambiguous 'else'",
                  r".*: warning: suggest parentheses around arithmetic in operand of '.+'",
                  r".*: warning: suggest parentheses around comparison in operand of '.+'",
                  r".*: warning: logical not is only applied to the left hand side of this comparison",
                  r".*: warning: using the result of an assignment as a condition without parentheses",
                  r".*: warning: .+ has lower precedence than .+ be evaluated first .+Wparentheses",
                  r".*: warning: suggest parentheses around '.+?' .+ '.+?'",
                  r".*: warning: suggest parentheses around assignment used as truth value"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Static variable used in non-static inline function',
     'patterns': [r".*: warning: '.+' is static but used in inline function '.+' which is not static"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wimplicit int',
     'description': 'No type or storage class (will default to int)',
     'patterns': [r".*: warning: data definition has no type or storage class"]},
    {'category': 'cont.', 'severity': Severity.SKIP,
     'description': 'skip, parameter name (without types) in function declaration',
     'patterns': [r".*: warning: parameter names \(without types\) in function declaration"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wstrict-aliasing',
     'description': 'Dereferencing <foo> breaks strict aliasing rules',
     'patterns': [r".*: warning: dereferencing .* break strict-aliasing rules"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wpointer-to-int-cast',
     'description': 'Cast from pointer to integer of different size',
     'patterns': [r".*: warning: cast from pointer to integer of different size",
                  r".*: warning: initialization makes pointer from integer without a cast"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wint-to-pointer-cast',
     'description': 'Cast to pointer from integer of different size',
     'patterns': [r".*: warning: cast to pointer from integer of different size"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Macro redefined',
     'patterns': [r".*: warning: '.+' macro redefined"]},
    {'category': 'cont.', 'severity': Severity.SKIP,
     'description': 'skip, ... location of the previous definition',
     'patterns': [r".*: warning: this is the location of the previous definition"]},
    {'category': 'ld', 'severity': Severity.MEDIUM,
     'description': 'ld: type and size of dynamic symbol are not defined',
     'patterns': [r".*: warning: type and size of dynamic symbol `.+' are not defined"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Pointer from integer without cast',
     'patterns': [r".*: warning: assignment makes pointer from integer without a cast"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Pointer from integer without cast',
     'patterns': [r".*: warning: passing argument [0-9]+ of '.+' makes pointer from integer without a cast"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Integer from pointer without cast',
     'patterns': [r".*: warning: assignment makes integer from pointer without a cast"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Integer from pointer without cast',
     'patterns': [r".*: warning: passing argument [0-9]+ of '.+' makes integer from pointer without a cast"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Integer from pointer without cast',
     'patterns': [r".*: warning: return makes integer from pointer without a cast"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wunknown-pragmas',
     'description': 'Ignoring pragma',
     'patterns': [r".*: warning: ignoring #pragma .+"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-W#pragma-messages',
     'description': 'Pragma warning messages',
     'patterns': [r".*: warning: .+W#pragma-messages"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wclobbered',
     'description': 'Variable might be clobbered by longjmp or vfork',
     'patterns': [r".*: warning: variable '.+' might be clobbered by 'longjmp' or 'vfork'"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wclobbered',
     'description': 'Argument might be clobbered by longjmp or vfork',
     'patterns': [r".*: warning: argument '.+' might be clobbered by 'longjmp' or 'vfork'"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wredundant-decls',
     'description': 'Redundant declaration',
     'patterns': [r".*: warning: redundant redeclaration of '.+'"]},
    {'category': 'cont.', 'severity': Severity.SKIP,
     'description': 'skip, previous declaration ... was here',
     'patterns': [r".*: warning: previous declaration of '.+' was here"]},
    {'category': 'C/C++', 'severity': Severity.HIGH, 'option': '-Wswitch-enum',
     'description': 'Enum value not handled in switch',
     'patterns': [r".*: warning: .*enumeration value.* not handled in switch.+Wswitch"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wuser-defined-warnings',
     'description': 'User defined warnings',
     'patterns': [r".*: warning: .* \[-Wuser-defined-warnings\]$"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Taking address of temporary',
     'patterns': [r".*: warning: taking address of temporary"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Taking address of packed member',
     'patterns': [r".*: warning: taking address of packed member"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Possible broken line continuation',
     'patterns': [r".*: warning: backslash and newline separated by space"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wundefined-var-template',
     'description': 'Undefined variable template',
     'patterns': [r".*: warning: instantiation of variable .* no definition is available"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wundefined-inline',
     'description': 'Inline function is not defined',
     'patterns': [r".*: warning: inline function '.*' is not defined"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Excess elements in initializer',
     'patterns': [r".*: warning: excess elements in .+ initializer"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Decimal constant is unsigned only in ISO C90',
     'patterns': [r".*: warning: this decimal constant is unsigned only in ISO C90"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wmain',
     'description': 'main is usually a function',
     'patterns': [r".*: warning: 'main' is usually a function"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Typedef ignored',
     'patterns': [r".*: warning: 'typedef' was ignored in this declaration"]},
    {'category': 'C/C++', 'severity': Severity.HIGH, 'option': '-Waddress',
     'description': 'Address always evaluates to true',
     'patterns': [r".*: warning: the address of '.+' will always evaluate as 'true'"]},
    {'category': 'C/C++', 'severity': Severity.FIXMENOW,
     'description': 'Freeing a non-heap object',
     'patterns': [r".*: warning: attempt to free a non-heap object '.+'"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wchar-subscripts',
     'description': 'Array subscript has type char',
     'patterns': [r".*: warning: array subscript .+ type 'char'.+Wchar-subscripts"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Constant too large for type',
     'patterns': [r".*: warning: integer constant is too large for '.+' type"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Woverflow',
     'description': 'Constant too large for type, truncated',
     'patterns': [r".*: warning: large integer implicitly truncated to unsigned type"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Winteger-overflow',
     'description': 'Overflow in expression',
     'patterns': [r".*: warning: overflow in expression; .*Winteger-overflow"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Woverflow',
     'description': 'Overflow in implicit constant conversion',
     'patterns': [r".*: warning: overflow in implicit constant conversion"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Declaration does not declare anything',
     'patterns': [r".*: warning: declaration 'class .+' does not declare anything"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wreorder',
     'description': 'Initialization order will be different',
     'patterns': [r".*: warning: '.+' will be initialized after",
                  r".*: warning: field .+ will be initialized after .+Wreorder"]},
    {'category': 'cont.', 'severity': Severity.SKIP,
     'description': 'skip,   ....',
     'patterns': [r".*: warning:   '.+'"]},
    {'category': 'cont.', 'severity': Severity.SKIP,
     'description': 'skip,   base ...',
     'patterns': [r".*: warning:   base '.+'"]},
    {'category': 'cont.', 'severity': Severity.SKIP,
     'description': 'skip,   when initialized here',
     'patterns': [r".*: warning:   when initialized here"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wmissing-parameter-type',
     'description': 'Parameter type not specified',
     'patterns': [r".*: warning: type of '.+' defaults to 'int'"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wmissing-declarations',
     'description': 'Missing declarations',
     'patterns': [r".*: warning: declaration does not declare anything"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wmissing-noreturn',
     'description': 'Missing noreturn',
     'patterns': [r".*: warning: function '.*' could be declared with attribute 'noreturn'"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'User warning',
     'patterns': [r".*: warning: #warning "".+"""]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wvexing-parse',
     'description': 'Vexing parsing problem',
     'patterns': [r".*: warning: empty parentheses interpreted as a function declaration"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wextra',
     'description': 'Dereferencing void*',
     'patterns': [r".*: warning: dereferencing 'void \*' pointer"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Comparison of pointer and integer',
     'patterns': [r".*: warning: ordered comparison of pointer with integer zero",
                  r".*: warning: .*comparison between pointer and integer"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Use of error-prone unary operator',
     'patterns': [r".*: warning: use of unary operator that may be intended as compound assignment"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wwrite-strings',
     'description': 'Conversion of string constant to non-const char*',
     'patterns': [r".*: warning: deprecated conversion from string constant to '.+'"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wstrict-prototypes',
     'description': 'Function declaration isn''t a prototype',
     'patterns': [r".*: warning: function declaration isn't a prototype"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wignored-qualifiers',
     'description': 'Type qualifiers ignored on function return value',
     'patterns': [r".*: warning: type qualifiers ignored on function return type",
                  r".*: warning: .+ type qualifier .+ has no effect .+Wignored-qualifiers"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': '<foo> declared inside parameter list, scope limited to this definition',
     'patterns': [r".*: warning: '.+' declared inside parameter list"]},
    {'category': 'cont.', 'severity': Severity.SKIP,
     'description': 'skip, its scope is only this ...',
     'patterns': [r".*: warning: its scope is only this definition or declaration, which is probably not what you want"]},
    {'category': 'C/C++', 'severity': Severity.LOW, 'option': '-Wcomment',
     'description': 'Line continuation inside comment',
     'patterns': [r".*: warning: multi-line comment"]},
    {'category': 'C/C++', 'severity': Severity.LOW, 'option': '-Wcomment',
     'description': 'Comment inside comment',
     'patterns': [r".*: warning: '.+' within block comment .*-Wcomment"]},
    {'category': 'C/C++', 'severity': Severity.LOW, 'option': '-Wdeprecated-declarations',
     'description': 'Deprecated declarations',
     'patterns': [r".*: warning: .+ is deprecated.+deprecated-declarations"]},
    {'category': 'C/C++', 'severity': Severity.LOW, 'option': '-Wdeprecated-register',
     'description': 'Deprecated register',
     'patterns': [r".*: warning: 'register' storage class specifier is deprecated"]},
    {'category': 'C/C++', 'severity': Severity.LOW, 'option': '-Wpointer-sign',
     'description': 'Converts between pointers to integer types with different sign',
     'patterns': [r".*: warning: .+ converts between pointers to integer types with different sign"]},
    {'category': 'C/C++', 'severity': Severity.HARMLESS,
     'description': 'Extra tokens after #endif',
     'patterns': [r".*: warning: extra tokens at end of #endif directive"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wenum-compare',
     'description': 'Comparison between different enums',
     'patterns': [r".*: warning: comparison between '.+' and '.+'.+Wenum-compare",
                  r".*: warning: comparison of .* enumeration types .*-Wenum-compare-switch"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wconversion',
     'description': 'Conversion may change value',
     'patterns': [r".*: warning: converting negative value '.+' to '.+'",
                  r".*: warning: conversion to '.+' .+ may (alter|change)"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wconversion-null',
     'description': 'Converting to non-pointer type from NULL',
     'patterns': [r".*: warning: converting to non-pointer type '.+' from NULL"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wsign-conversion',
     'description': 'Implicit sign conversion',
     'patterns': [r".*: warning: implicit conversion changes signedness"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wnull-conversion',
     'description': 'Converting NULL to non-pointer type',
     'patterns': [r".*: warning: implicit conversion of NULL constant to '.+'"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wnon-literal-null-conversion',
     'description': 'Zero used as null pointer',
     'patterns': [r".*: warning: expression .* zero treated as a null pointer constant"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wpointer-compare',
     'description': 'Compare pointer to null character',
     'patterns': [r".*: warning: comparing a pointer to a null character constant"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Implicit conversion changes value or loses precision',
     'patterns': [r".*: warning: implicit conversion .* changes value from .* to .*-conversion",
                  r".*: warning: implicit conversion loses integer precision:"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Passing NULL as non-pointer argument',
     'patterns': [r".*: warning: passing NULL to non-pointer argument [0-9]+ of '.+'"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wctor-dtor-privacy',
     'description': 'Class seems unusable because of private ctor/dtor',
     'patterns': [r".*: warning: all member functions in class '.+' are private"]},
    # skip this next one, because it only points out some RefBase-based classes
    # where having a private destructor is perfectly fine
    {'category': 'C/C++', 'severity': Severity.SKIP, 'option': '-Wctor-dtor-privacy',
     'description': 'Class seems unusable because of private ctor/dtor',
     'patterns': [r".*: warning: 'class .+' only defines a private destructor and has no friends"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wctor-dtor-privacy',
     'description': 'Class seems unusable because of private ctor/dtor',
     'patterns': [r".*: warning: 'class .+' only defines private constructors and has no friends"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wgnu-static-float-init',
     'description': 'In-class initializer for static const float/double',
     'patterns': [r".*: warning: in-class initializer for static data member of .+const (float|double)"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wpointer-arith',
     'description': 'void* used in arithmetic',
     'patterns': [r".*: warning: pointer of type 'void \*' used in (arithmetic|subtraction)",
                  r".*: warning: arithmetic on .+ to void is a GNU extension.*Wpointer-arith",
                  r".*: warning: wrong type argument to increment"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wsign-promo',
     'description': 'Overload resolution chose to promote from unsigned or enum to signed type',
     'patterns': [r".*: warning: passing '.+' chooses '.+' over '.+'.*Wsign-promo"]},
    {'category': 'cont.', 'severity': Severity.SKIP,
     'description': 'skip,   in call to ...',
     'patterns': [r".*: warning:   in call to '.+'"]},
    {'category': 'C/C++', 'severity': Severity.HIGH, 'option': '-Wextra',
     'description': 'Base should be explicitly initialized in copy constructor',
     'patterns': [r".*: warning: base class '.+' should be explicitly initialized in the copy constructor"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Return value from void function',
     'patterns': [r".*: warning: 'return' with a value, in function returning void"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': 'multichar',
     'description': 'Multi-character character constant',
     'patterns': [r".*: warning: multi-character character constant"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': 'writable-strings',
     'description': 'Conversion from string literal to char*',
     'patterns': [r".*: warning: .+ does not allow conversion from string literal to 'char \*'"]},
    {'category': 'C/C++', 'severity': Severity.LOW, 'option': '-Wextra-semi',
     'description': 'Extra \';\'',
     'patterns': [r".*: warning: extra ';' .+extra-semi"]},
    {'category': 'C/C++', 'severity': Severity.LOW,
     'description': 'Useless specifier',
     'patterns': [r".*: warning: useless storage class specifier in empty declaration"]},
    {'category': 'C/C++', 'severity': Severity.LOW, 'option': '-Wduplicate-decl-specifier',
     'description': 'Duplicate declaration specifier',
     'patterns': [r".*: warning: duplicate '.+' declaration specifier"]},
    {'category': 'C/C++', 'severity': Severity.LOW, 'option': 'tautological-compare',
     'description': 'Comparison of self is always false',
     'patterns': [r".*: self-comparison always evaluates to false"]},
    {'category': 'C/C++', 'severity': Severity.LOW, 'option': 'constant-logical-operand',
     'description': 'Logical op with constant operand',
     'patterns': [r".*: use of logical '.+' with constant operand"]},
    {'category': 'C/C++', 'severity': Severity.LOW, 'option': 'literal-suffix',
     'description': 'Needs a space between literal and string macro',
     'patterns': [r".*: warning: invalid suffix on literal.+ requires a space .+Wliteral-suffix"]},
    {'category': 'C/C++', 'severity': Severity.LOW, 'option': '#warnings',
     'description': 'Warnings from #warning',
     'patterns': [r".*: warning: .+-W#warnings"]},
    {'category': 'C/C++', 'severity': Severity.LOW, 'option': 'absolute-value',
     'description': 'Using float/int absolute value function with int/float argument',
     'patterns': [r".*: warning: using .+ absolute value function .+ when argument is .+ type .+Wabsolute-value",
                  r".*: warning: absolute value function '.+' given .+ which may cause truncation .+Wabsolute-value"]},
    {'category': 'C/C++', 'severity': Severity.LOW, 'option': '-Wc++11-extensions',
     'description': 'Using C++11 extensions',
     'patterns': [r".*: warning: 'auto' type specifier is a C\+\+11 extension"]},
    {'category': 'C/C++', 'severity': Severity.LOW,
     'description': 'Refers to implicitly defined namespace',
     'patterns': [r".*: warning: using directive refers to implicitly-defined namespace .+"]},
    {'category': 'C/C++', 'severity': Severity.LOW, 'option': '-Winvalid-pp-token',
     'description': 'Invalid pp token',
     'patterns': [r".*: warning: missing .+Winvalid-pp-token"]},
    {'category': 'link', 'severity': Severity.LOW,
     'description': 'need glibc to link',
     'patterns': [r".*: warning: .* requires at runtime .* glibc .* for linking"]},

    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Operator new returns NULL',
     'patterns': [r".*: warning: 'operator new' must not return NULL unless it is declared 'throw\(\)' .+"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wnull-arithmetic',
     'description': 'NULL used in arithmetic',
     'patterns': [r".*: warning: NULL used in arithmetic",
                  r".*: warning: comparison between NULL and non-pointer"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': 'header-guard',
     'description': 'Misspelled header guard',
     'patterns': [r".*: warning: '.+' is used as a header guard .+ followed by .+ different macro"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': 'empty-body',
     'description': 'Empty loop body',
     'patterns': [r".*: warning: .+ loop has empty body"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': 'enum-conversion',
     'description': 'Implicit conversion from enumeration type',
     'patterns': [r".*: warning: implicit conversion from enumeration type '.+'"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': 'switch',
     'description': 'case value not in enumerated type',
     'patterns': [r".*: warning: case value not in enumerated type '.+'"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Use of deprecated method',
     'patterns': [r".*: warning: '.+' is deprecated .+"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Use of garbage or uninitialized value',
     'patterns': [r".*: warning: .+ uninitialized .+\[-Wsometimes-uninitialized\]"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wsizeof-array-argument',
     'description': 'Sizeof on array argument',
     'patterns': [r".*: warning: sizeof on array function parameter will return"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wsizeof-pointer-memacces',
     'description': 'Bad argument size of memory access functions',
     'patterns': [r".*: warning: .+\[-Wsizeof-pointer-memaccess\]"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Return value not checked',
     'patterns': [r".*: warning: The return value from .+ is not checked"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Possible heap pollution',
     'patterns': [r".*: warning: .*Possible heap pollution from .+ type .+"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wfor-loop-analysis',
     'description': 'Variable used in loop condition not modified in loop body',
     'patterns': [r".*: warning: variable '.+' used in loop condition.*Wfor-loop-analysis"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM,
     'description': 'Closing a previously closed file',
     'patterns': [r".*: warning: Closing a previously closed file"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wunnamed-type-template-args',
     'description': 'Unnamed template type argument',
     'patterns': [r".*: warning: template argument.+Wunnamed-type-template-args"]},
    {'category': 'C/C++', 'severity': Severity.MEDIUM, 'option': '-Wimplicit-fallthrough',
     'description': 'Unannotated fall-through between switch labels',
     'patterns': [r".*: warning: unannotated fall-through between switch labels.+Wimplicit-fallthrough"]},
    {'category': 'C/C++', 'severity': Severity.HARMLESS,
     'description': 'Discarded qualifier from pointer target type',
     'patterns': [r".*: warning: .+ discards '.+' qualifier from pointer target type"]},
    {'category': 'C/C++', 'severity': Severity.HARMLESS,
     'description': 'Use snprintf instead of sprintf',
     'patterns': [r".*: warning: .*sprintf is often misused; please use snprintf"]},
    {'category': 'C/C++', 'severity': Severity.HARMLESS,
     'description': 'Unsupported optimizaton flag',
     'patterns': [r".*: warning: optimization flag '.+' is not supported"]},
    {'category': 'C/C++', 'severity': Severity.HARMLESS,
     'description': 'Extra or missing parentheses',
     'patterns': [r".*: warning: equality comparison with extraneous parentheses",
                  r".*: warning: .+ within .+Wlogical-op-parentheses"]},
    {'category': 'C/C++', 'severity': Severity.HARMLESS, 'option': 'mismatched-tags',
     'description': 'Mismatched class vs struct tags',
     'patterns': [r".*: warning: '.+' defined as a .+ here but previously declared as a .+mismatched-tags",
                  r".*: warning: .+ was previously declared as a .+mismatched-tags"]},
]


def compile_patterns(patterns):
  """Precompiling every pattern speeds up parsing by about 30x."""
  for i in patterns:
    i['compiled_patterns'] = []
    for pat in i['patterns']:
      i['compiled_patterns'].append(re.compile(pat))


compile_patterns(warn_patterns)