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cpp.py
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"""The C++ language domain."""
import re
from typing import (Any, Callable, Dict, Generator, Iterator, List, Optional, Tuple, TypeVar,
Union)
from docutils import nodes
from docutils.nodes import Element, Node, TextElement, system_message
from docutils.parsers.rst import directives
from sphinx import addnodes
from sphinx.addnodes import desc_signature, pending_xref
from sphinx.application import Sphinx
from sphinx.builders import Builder
from sphinx.directives import ObjectDescription
from sphinx.domains import Domain, ObjType
from sphinx.environment import BuildEnvironment
from sphinx.errors import NoUri
from sphinx.locale import _, __
from sphinx.roles import SphinxRole, XRefRole
from sphinx.transforms import SphinxTransform
from sphinx.transforms.post_transforms import ReferencesResolver
from sphinx.util import logging
from sphinx.util.cfamily import (ASTAttributeList, ASTBaseBase, ASTBaseParenExprList,
BaseParser, DefinitionError, NoOldIdError, StringifyTransform,
UnsupportedMultiCharacterCharLiteral, anon_identifier_re,
binary_literal_re, char_literal_re, float_literal_re,
float_literal_suffix_re, hex_literal_re, identifier_re,
integer_literal_re, integers_literal_suffix_re,
octal_literal_re, verify_description_mode)
from sphinx.util.docfields import Field, GroupedField
from sphinx.util.docutils import SphinxDirective
from sphinx.util.nodes import make_refnode
from sphinx.util.typing import OptionSpec
logger = logging.getLogger(__name__)
T = TypeVar('T')
"""
Important note on ids
----------------------------------------------------------------------------
Multiple id generation schemes are used due to backwards compatibility.
- v1: 1.2.3 <= version < 1.3
The style used before the rewrite.
It is not the actual old code, but a replication of the behaviour.
- v2: 1.3 <= version < now
Standardised mangling scheme from
https://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangling
though not completely implemented.
All versions are generated and attached to elements. The newest is used for
the index. All of the versions should work as permalinks.
Signature Nodes and Tagnames
----------------------------------------------------------------------------
Each signature is in a desc_signature node, where all children are
desc_signature_line nodes. Each of these lines will have the attribute
'sphinx_line_type' set to one of the following (prioritized):
- 'declarator', if the line contains the name of the declared object.
- 'templateParams', if the line starts a template parameter list,
- 'templateParams', if the line has template parameters
Note: such lines might get a new tag in the future.
- 'templateIntroduction, if the line is on the form 'conceptName{...}'
No other desc_signature nodes should exist (so far).
Grammar
----------------------------------------------------------------------------
See https://www.nongnu.org/hcb/ for the grammar,
and https://github.com/cplusplus/draft/blob/master/source/grammar.tex,
and https://github.com/cplusplus/concepts-ts
for the newest grammar.
common grammar things:
template-declaration ->
"template" "<" template-parameter-list ">" declaration
template-parameter-list ->
template-parameter
| template-parameter-list "," template-parameter
template-parameter ->
type-parameter
| parameter-declaration # i.e., same as a function argument
type-parameter ->
"class" "..."[opt] identifier[opt]
| "class" identifier[opt] "=" type-id
| "typename" "..."[opt] identifier[opt]
| "typename" identifier[opt] "=" type-id
| "template" "<" template-parameter-list ">"
"class" "..."[opt] identifier[opt]
| "template" "<" template-parameter-list ">"
"class" identifier[opt] "=" id-expression
# also, from C++17 we can have "typename" in template templates
templateDeclPrefix ->
"template" "<" template-parameter-list ">"
simple-declaration ->
attribute-specifier-seq[opt] decl-specifier-seq[opt]
init-declarator-list[opt] ;
# Make the semicolon optional.
# For now: drop the attributes (TODO).
# Use at most 1 init-declarator.
-> decl-specifier-seq init-declarator
-> decl-specifier-seq declarator initializer
decl-specifier ->
storage-class-specifier ->
( "static" (only for member_object and function_object)
| "extern" (only for member_object and function_object)
| "register"
)
thread_local[opt] (only for member_object)
(it can also appear before the others)
| type-specifier -> trailing-type-specifier
| function-specifier -> "inline" | "virtual" | "explicit" (only
for function_object)
| "friend" (only for function_object)
| "constexpr" (only for member_object and function_object)
trailing-type-specifier ->
simple-type-specifier
| elaborated-type-specifier
| typename-specifier
| cv-qualifier -> "const" | "volatile"
stricter grammar for decl-specifier-seq (with everything, each object
uses a subset):
visibility storage-class-specifier function-specifier "friend"
"constexpr" "volatile" "const" trailing-type-specifier
# where trailing-type-specifier can no be cv-qualifier
# Inside e.g., template parameters a strict subset is used
# (see type-specifier-seq)
trailing-type-specifier ->
simple-type-specifier ->
::[opt] nested-name-specifier[opt] type-name
| ::[opt] nested-name-specifier "template" simple-template-id
| "char" | "bool" | etc.
| decltype-specifier
| elaborated-type-specifier ->
class-key attribute-specifier-seq[opt] ::[opt]
nested-name-specifier[opt] identifier
| class-key ::[opt] nested-name-specifier[opt] template[opt]
simple-template-id
| "enum" ::[opt] nested-name-specifier[opt] identifier
| typename-specifier ->
"typename" ::[opt] nested-name-specifier identifier
| "typename" ::[opt] nested-name-specifier template[opt]
simple-template-id
class-key -> "class" | "struct" | "union"
type-name ->* identifier | simple-template-id
# ignoring attributes and decltype, and then some left-factoring
trailing-type-specifier ->
rest-of-trailing
("class" | "struct" | "union" | "typename") rest-of-trailing
built-in -> "char" | "bool" | etc.
decltype-specifier
rest-of-trailing -> (with some simplification)
"::"[opt] list-of-elements-separated-by-::
element ->
"template"[opt] identifier ("<" template-argument-list ">")[opt]
template-argument-list ->
template-argument "..."[opt]
| template-argument-list "," template-argument "..."[opt]
template-argument ->
constant-expression
| type-specifier-seq abstract-declarator
| id-expression
declarator ->
ptr-declarator
| noptr-declarator parameters-and-qualifiers trailing-return-type
ptr-declarator ->
noptr-declarator
| ptr-operator ptr-declarator
noptr-declarator ->
declarator-id attribute-specifier-seq[opt] ->
"..."[opt] id-expression
| rest-of-trailing
| noptr-declarator parameters-and-qualifiers
| noptr-declarator "[" constant-expression[opt] "]"
attribute-specifier-seq[opt]
| "(" ptr-declarator ")"
ptr-operator ->
"*" attribute-specifier-seq[opt] cv-qualifier-seq[opt]
| "& attribute-specifier-seq[opt]
| "&&" attribute-specifier-seq[opt]
| "::"[opt] nested-name-specifier "*" attribute-specifier-seq[opt]
cv-qualifier-seq[opt]
# function_object must use a parameters-and-qualifiers, the others may
# use it (e.g., function pointers)
parameters-and-qualifiers ->
"(" parameter-clause ")" attribute-specifier-seq[opt]
cv-qualifier-seq[opt] ref-qualifier[opt]
exception-specification[opt]
ref-qualifier -> "&" | "&&"
exception-specification ->
"noexcept" ("(" constant-expression ")")[opt]
"throw" ("(" type-id-list ")")[opt]
# TODO: we don't implement attributes
# member functions can have initializers, but we fold them into here
memberFunctionInit -> "=" "0"
# (note: only "0" is allowed as the value, according to the standard,
# right?)
enum-head ->
enum-key attribute-specifier-seq[opt] nested-name-specifier[opt]
identifier enum-base[opt]
enum-key -> "enum" | "enum struct" | "enum class"
enum-base ->
":" type
enumerator-definition ->
identifier
| identifier "=" constant-expression
We additionally add the possibility for specifying the visibility as the
first thing.
concept_object:
goal:
just a declaration of the name (for now)
grammar: only a single template parameter list, and the nested name
may not have any template argument lists
"template" "<" template-parameter-list ">"
nested-name-specifier
type_object:
goal:
either a single type (e.g., "MyClass:Something_T" or a typedef-like
thing (e.g. "Something Something_T" or "int I_arr[]"
grammar, single type: based on a type in a function parameter, but
without a name:
parameter-declaration
-> attribute-specifier-seq[opt] decl-specifier-seq
abstract-declarator[opt]
# Drop the attributes
-> decl-specifier-seq abstract-declarator[opt]
grammar, typedef-like: no initilizer
decl-specifier-seq declarator
Can start with a templateDeclPrefix.
member_object:
goal: as a type_object which must have a declarator, and optionally
with a initializer
grammar:
decl-specifier-seq declarator initializer
Can start with a templateDeclPrefix.
function_object:
goal: a function declaration, TODO: what about templates? for now: skip
grammar: no initializer
decl-specifier-seq declarator
Can start with a templateDeclPrefix.
class_object:
goal: a class declaration, but with specification of a base class
grammar:
attribute-specifier-seq[opt]
nested-name "final"[opt] (":" base-specifier-list)[opt]
base-specifier-list ->
base-specifier "..."[opt]
| base-specifier-list, base-specifier "..."[opt]
base-specifier ->
base-type-specifier
| "virtual" access-spe"cifier[opt] base-type-specifier
| access-specifier[opt] "virtual"[opt] base-type-specifier
Can start with a templateDeclPrefix.
enum_object:
goal: an unscoped enum or a scoped enum, optionally with the underlying
type specified
grammar:
("class" | "struct")[opt] visibility[opt]
attribute-specifier-seq[opt] nested-name (":" type)[opt]
enumerator_object:
goal: an element in a scoped or unscoped enum. The name should be
injected according to the scopedness.
grammar:
nested-name ("=" constant-expression)
namespace_object:
goal: a directive to put all following declarations in a specific scope
grammar:
nested-name
"""
udl_identifier_re = re.compile(r'''(?x)
[a-zA-Z_][a-zA-Z0-9_]*\b # note, no word boundary in the beginning
''')
_string_re = re.compile(r"[LuU8]?('([^'\\]*(?:\\.[^'\\]*)*)'"
r'|"([^"\\]*(?:\\.[^"\\]*)*)")', re.S)
_visibility_re = re.compile(r'\b(public|private|protected)\b')
_operator_re = re.compile(r'''(?x)
\[\s*\]
| \(\s*\)
| \+\+ | --
| ->\*? | \,
| (<<|>>)=? | && | \|\|
| <=>
| [!<>=/*%+|&^~-]=?
| (\b(and|and_eq|bitand|bitor|compl|not|not_eq|or|or_eq|xor|xor_eq)\b)
''')
_fold_operator_re = re.compile(r'''(?x)
->\* | \.\* | \,
| (<<|>>)=? | && | \|\|
| !=
| [<>=/*%+|&^~-]=?
''')
# see https://en.cppreference.com/w/cpp/keyword
_keywords = [
'alignas', 'alignof', 'and', 'and_eq', 'asm', 'auto', 'bitand', 'bitor',
'bool', 'break', 'case', 'catch', 'char', 'char8_t', 'char16_t', 'char32_t',
'class', 'compl', 'concept', 'const', 'consteval', 'constexpr', 'constinit',
'const_cast', 'continue',
'decltype', 'default', 'delete', 'do', 'double', 'dynamic_cast', 'else',
'enum', 'explicit', 'export', 'extern', 'false', 'float', 'for', 'friend',
'goto', 'if', 'inline', 'int', 'long', 'mutable', 'namespace', 'new',
'noexcept', 'not', 'not_eq', 'nullptr', 'operator', 'or', 'or_eq',
'private', 'protected', 'public', 'register', 'reinterpret_cast',
'requires', 'return', 'short', 'signed', 'sizeof', 'static',
'static_assert', 'static_cast', 'struct', 'switch', 'template', 'this',
'thread_local', 'throw', 'true', 'try', 'typedef', 'typeid', 'typename',
'union', 'unsigned', 'using', 'virtual', 'void', 'volatile', 'wchar_t',
'while', 'xor', 'xor_eq'
]
_simple_type_specifiers_re = re.compile(r"""(?x)
\b(
auto|void|bool
|signed|unsigned
|short|long
|char|wchar_t|char(8|16|32)_t
|int
|__int(64|128) # extension
|float|double
|__float80|_Float64x|__float128|_Float128 # extension
|_Complex|_Imaginary # extension
)\b
""")
_max_id = 4
_id_prefix = [None, '', '_CPPv2', '_CPPv3', '_CPPv4']
# Ids are used in lookup keys which are used across pickled files,
# so when _max_id changes, make sure to update the ENV_VERSION.
# ------------------------------------------------------------------------------
# Id v1 constants
# ------------------------------------------------------------------------------
_id_fundamental_v1 = {
'char': 'c',
'signed char': 'c',
'unsigned char': 'C',
'int': 'i',
'signed int': 'i',
'unsigned int': 'U',
'long': 'l',
'signed long': 'l',
'unsigned long': 'L',
'bool': 'b'
}
_id_shorthands_v1 = {
'std::string': 'ss',
'std::ostream': 'os',
'std::istream': 'is',
'std::iostream': 'ios',
'std::vector': 'v',
'std::map': 'm'
}
_id_operator_v1 = {
'new': 'new-operator',
'new[]': 'new-array-operator',
'delete': 'delete-operator',
'delete[]': 'delete-array-operator',
# the arguments will make the difference between unary and binary
# '+(unary)' : 'ps',
# '-(unary)' : 'ng',
# '&(unary)' : 'ad',
# '*(unary)' : 'de',
'~': 'inv-operator',
'+': 'add-operator',
'-': 'sub-operator',
'*': 'mul-operator',
'/': 'div-operator',
'%': 'mod-operator',
'&': 'and-operator',
'|': 'or-operator',
'^': 'xor-operator',
'=': 'assign-operator',
'+=': 'add-assign-operator',
'-=': 'sub-assign-operator',
'*=': 'mul-assign-operator',
'/=': 'div-assign-operator',
'%=': 'mod-assign-operator',
'&=': 'and-assign-operator',
'|=': 'or-assign-operator',
'^=': 'xor-assign-operator',
'<<': 'lshift-operator',
'>>': 'rshift-operator',
'<<=': 'lshift-assign-operator',
'>>=': 'rshift-assign-operator',
'==': 'eq-operator',
'!=': 'neq-operator',
'<': 'lt-operator',
'>': 'gt-operator',
'<=': 'lte-operator',
'>=': 'gte-operator',
'!': 'not-operator',
'&&': 'sand-operator',
'||': 'sor-operator',
'++': 'inc-operator',
'--': 'dec-operator',
',': 'comma-operator',
'->*': 'pointer-by-pointer-operator',
'->': 'pointer-operator',
'()': 'call-operator',
'[]': 'subscript-operator'
}
# ------------------------------------------------------------------------------
# Id v > 1 constants
# ------------------------------------------------------------------------------
_id_fundamental_v2 = {
# not all of these are actually parsed as fundamental types, TODO: do that
'void': 'v',
'bool': 'b',
'char': 'c',
'signed char': 'a',
'unsigned char': 'h',
'wchar_t': 'w',
'char32_t': 'Di',
'char16_t': 'Ds',
'char8_t': 'Du',
'short': 's',
'short int': 's',
'signed short': 's',
'signed short int': 's',
'unsigned short': 't',
'unsigned short int': 't',
'int': 'i',
'signed': 'i',
'signed int': 'i',
'unsigned': 'j',
'unsigned int': 'j',
'long': 'l',
'long int': 'l',
'signed long': 'l',
'signed long int': 'l',
'unsigned long': 'm',
'unsigned long int': 'm',
'long long': 'x',
'long long int': 'x',
'signed long long': 'x',
'signed long long int': 'x',
'__int64': 'x',
'unsigned long long': 'y',
'unsigned long long int': 'y',
'__int128': 'n',
'signed __int128': 'n',
'unsigned __int128': 'o',
'float': 'f',
'double': 'd',
'long double': 'e',
'__float80': 'e', '_Float64x': 'e',
'__float128': 'g', '_Float128': 'g',
'_Complex float': 'Cf',
'_Complex double': 'Cd',
'_Complex long double': 'Ce',
'_Imaginary float': 'f',
'_Imaginary double': 'd',
'_Imaginary long double': 'e',
'auto': 'Da',
'decltype(auto)': 'Dc',
'std::nullptr_t': 'Dn'
}
_id_operator_v2 = {
'new': 'nw',
'new[]': 'na',
'delete': 'dl',
'delete[]': 'da',
# the arguments will make the difference between unary and binary
# in operator definitions
# '+(unary)' : 'ps',
# '-(unary)' : 'ng',
# '&(unary)' : 'ad',
# '*(unary)' : 'de',
'~': 'co', 'compl': 'co',
'+': 'pl',
'-': 'mi',
'*': 'ml',
'/': 'dv',
'%': 'rm',
'&': 'an', 'bitand': 'an',
'|': 'or', 'bitor': 'or',
'^': 'eo', 'xor': 'eo',
'=': 'aS',
'+=': 'pL',
'-=': 'mI',
'*=': 'mL',
'/=': 'dV',
'%=': 'rM',
'&=': 'aN', 'and_eq': 'aN',
'|=': 'oR', 'or_eq': 'oR',
'^=': 'eO', 'xor_eq': 'eO',
'<<': 'ls',
'>>': 'rs',
'<<=': 'lS',
'>>=': 'rS',
'==': 'eq',
'!=': 'ne', 'not_eq': 'ne',
'<': 'lt',
'>': 'gt',
'<=': 'le',
'>=': 'ge',
'<=>': 'ss',
'!': 'nt', 'not': 'nt',
'&&': 'aa', 'and': 'aa',
'||': 'oo', 'or': 'oo',
'++': 'pp',
'--': 'mm',
',': 'cm',
'->*': 'pm',
'->': 'pt',
'()': 'cl',
'[]': 'ix',
'.*': 'ds', # this one is not overloadable, but we need it for expressions
'?': 'qu',
}
_id_operator_unary_v2 = {
'++': 'pp_',
'--': 'mm_',
'*': 'de',
'&': 'ad',
'+': 'ps',
'-': 'ng',
'!': 'nt', 'not': 'nt',
'~': 'co', 'compl': 'co'
}
_id_char_from_prefix: Dict[Optional[str], str] = {
None: 'c', 'u8': 'c',
'u': 'Ds', 'U': 'Di', 'L': 'w'
}
# these are ordered by preceedence
_expression_bin_ops = [
['||', 'or'],
['&&', 'and'],
['|', 'bitor'],
['^', 'xor'],
['&', 'bitand'],
['==', '!=', 'not_eq'],
['<=>', '<=', '>=', '<', '>'],
['<<', '>>'],
['+', '-'],
['*', '/', '%'],
['.*', '->*']
]
_expression_unary_ops = ["++", "--", "*", "&", "+", "-", "!", "not", "~", "compl"]
_expression_assignment_ops = ["=", "*=", "/=", "%=", "+=", "-=",
">>=", "<<=", "&=", "and_eq", "^=", "|=", "xor_eq", "or_eq"]
_id_explicit_cast = {
'dynamic_cast': 'dc',
'static_cast': 'sc',
'const_cast': 'cc',
'reinterpret_cast': 'rc'
}
class _DuplicateSymbolError(Exception):
def __init__(self, symbol: "Symbol", declaration: "ASTDeclaration") -> None:
assert symbol
assert declaration
self.symbol = symbol
self.declaration = declaration
def __str__(self) -> str:
return "Internal C++ duplicate symbol error:\n%s" % self.symbol.dump(0)
class ASTBase(ASTBaseBase):
pass
# Names
################################################################################
class ASTIdentifier(ASTBase):
def __init__(self, identifier: str) -> None:
assert identifier is not None
assert len(identifier) != 0
self.identifier = identifier
def is_anon(self) -> bool:
return self.identifier[0] == '@'
def get_id(self, version: int) -> str:
if self.is_anon() and version < 3:
raise NoOldIdError()
if version == 1:
if self.identifier == 'size_t':
return 's'
else:
return self.identifier
if self.identifier == "std":
return 'St'
elif self.identifier[0] == "~":
# a destructor, just use an arbitrary version of dtors
return 'D0'
else:
if self.is_anon():
return 'Ut%d_%s' % (len(self.identifier) - 1, self.identifier[1:])
else:
return str(len(self.identifier)) + self.identifier
# and this is where we finally make a difference between __str__ and the display string
def __str__(self) -> str:
return self.identifier
def get_display_string(self) -> str:
return "[anonymous]" if self.is_anon() else self.identifier
def describe_signature(self, signode: TextElement, mode: str, env: "BuildEnvironment",
prefix: str, templateArgs: str, symbol: "Symbol") -> None:
verify_description_mode(mode)
if self.is_anon():
node = addnodes.desc_sig_name(text="[anonymous]")
else:
node = addnodes.desc_sig_name(self.identifier, self.identifier)
if mode == 'markType':
targetText = prefix + self.identifier + templateArgs
pnode = addnodes.pending_xref('', refdomain='cpp',
reftype='identifier',
reftarget=targetText, modname=None,
classname=None)
pnode['cpp:parent_key'] = symbol.get_lookup_key()
pnode += node
signode += pnode
elif mode == 'lastIsName':
nameNode = addnodes.desc_name()
nameNode += node
signode += nameNode
elif mode == 'noneIsName':
signode += node
elif mode == 'param':
node['classes'].append('sig-param')
signode += node
elif mode == 'udl':
# the target is 'operator""id' instead of just 'id'
assert len(prefix) == 0
assert len(templateArgs) == 0
assert not self.is_anon()
targetText = 'operator""' + self.identifier
pnode = addnodes.pending_xref('', refdomain='cpp',
reftype='identifier',
reftarget=targetText, modname=None,
classname=None)
pnode['cpp:parent_key'] = symbol.get_lookup_key()
pnode += node
signode += pnode
else:
raise Exception('Unknown description mode: %s' % mode)
class ASTNestedNameElement(ASTBase):
def __init__(self, identOrOp: Union[ASTIdentifier, "ASTOperator"],
templateArgs: "ASTTemplateArgs") -> None:
self.identOrOp = identOrOp
self.templateArgs = templateArgs
def is_operator(self) -> bool:
return False
def get_id(self, version: int) -> str:
res = self.identOrOp.get_id(version)
if self.templateArgs:
res += self.templateArgs.get_id(version)
return res
def _stringify(self, transform: StringifyTransform) -> str:
res = transform(self.identOrOp)
if self.templateArgs:
res += transform(self.templateArgs)
return res
def describe_signature(self, signode: TextElement, mode: str,
env: "BuildEnvironment", prefix: str, symbol: "Symbol") -> None:
tArgs = str(self.templateArgs) if self.templateArgs is not None else ''
self.identOrOp.describe_signature(signode, mode, env, prefix, tArgs, symbol)
if self.templateArgs is not None:
self.templateArgs.describe_signature(signode, 'markType', env, symbol)
class ASTNestedName(ASTBase):
def __init__(self, names: List[ASTNestedNameElement],
templates: List[bool], rooted: bool) -> None:
assert len(names) > 0
self.names = names
self.templates = templates
assert len(self.names) == len(self.templates)
self.rooted = rooted
@property
def name(self) -> "ASTNestedName":
return self
def num_templates(self) -> int:
count = 0
for n in self.names:
if n.is_operator():
continue
if n.templateArgs:
count += 1
return count
def get_id(self, version: int, modifiers: str = '') -> str:
if version == 1:
tt = str(self)
if tt in _id_shorthands_v1:
return _id_shorthands_v1[tt]
else:
return '::'.join(n.get_id(version) for n in self.names)
res = []
if len(self.names) > 1 or len(modifiers) > 0:
res.append('N')
res.append(modifiers)
for n in self.names:
res.append(n.get_id(version))
if len(self.names) > 1 or len(modifiers) > 0:
res.append('E')
return ''.join(res)
def _stringify(self, transform: StringifyTransform) -> str:
res = []
if self.rooted:
res.append('')
for i in range(len(self.names)):
n = self.names[i]
if self.templates[i]:
res.append("template " + transform(n))
else:
res.append(transform(n))
return '::'.join(res)
def describe_signature(self, signode: TextElement, mode: str,
env: "BuildEnvironment", symbol: "Symbol") -> None:
verify_description_mode(mode)
# just print the name part, with template args, not template params
if mode == 'noneIsName':
if self.rooted:
raise AssertionError("Can this happen?") # TODO
signode += nodes.Text('::')
for i in range(len(self.names)):
if i != 0:
raise AssertionError("Can this happen?") # TODO
signode += nodes.Text('::blah')
n = self.names[i]
if self.templates[i]:
raise AssertionError("Can this happen?") # TODO
signode += nodes.Text("template")
signode += nodes.Text(" ")
n.describe_signature(signode, mode, env, '', symbol)
elif mode == 'param':
assert not self.rooted, str(self)
assert len(self.names) == 1
assert not self.templates[0]
self.names[0].describe_signature(signode, 'param', env, '', symbol)
elif mode in ('markType', 'lastIsName', 'markName'):
# Each element should be a pending xref targeting the complete
# prefix. however, only the identifier part should be a link, such
# that template args can be a link as well.
# For 'lastIsName' we should also prepend template parameter lists.
templateParams: List[Any] = []
if mode == 'lastIsName':
assert symbol is not None
if symbol.declaration.templatePrefix is not None:
templateParams = symbol.declaration.templatePrefix.templates
iTemplateParams = 0
templateParamsPrefix = ''
prefix = ''
first = True
names = self.names[:-1] if mode == 'lastIsName' else self.names
# If lastIsName, then wrap all of the prefix in a desc_addname,
# else append directly to signode.
# NOTE: Breathe previously relied on the prefix being in the desc_addname node,
# so it can remove it in inner declarations.
dest = signode
if mode == 'lastIsName':
dest = addnodes.desc_addname()
if self.rooted:
prefix += '::'
if mode == 'lastIsName' and len(names) == 0:
signode += addnodes.desc_sig_punctuation('::', '::')
else:
dest += addnodes.desc_sig_punctuation('::', '::')
for i in range(len(names)):
nne = names[i]
template = self.templates[i]
if not first:
dest += addnodes.desc_sig_punctuation('::', '::')
prefix += '::'
if template:
dest += addnodes.desc_sig_keyword('template', 'template')
dest += addnodes.desc_sig_space()
first = False
txt_nne = str(nne)
if txt_nne != '':
if nne.templateArgs and iTemplateParams < len(templateParams):
templateParamsPrefix += str(templateParams[iTemplateParams])
iTemplateParams += 1
nne.describe_signature(dest, 'markType',
env, templateParamsPrefix + prefix, symbol)
prefix += txt_nne
if mode == 'lastIsName':
if len(self.names) > 1:
dest += addnodes.desc_sig_punctuation('::', '::')
signode += dest
if self.templates[-1]:
signode += addnodes.desc_sig_keyword('template', 'template')
signode += addnodes.desc_sig_space()
self.names[-1].describe_signature(signode, mode, env, '', symbol)
else:
raise Exception('Unknown description mode: %s' % mode)
################################################################################
# Expressions
################################################################################
class ASTExpression(ASTBase):
def get_id(self, version: int) -> str:
raise NotImplementedError(repr(self))
def describe_signature(self, signode: TextElement, mode: str,
env: "BuildEnvironment", symbol: "Symbol") -> None:
raise NotImplementedError(repr(self))
# Primary expressions
################################################################################
class ASTLiteral(ASTExpression):
pass
class ASTPointerLiteral(ASTLiteral):
def _stringify(self, transform: StringifyTransform) -> str:
return 'nullptr'
def get_id(self, version: int) -> str:
return 'LDnE'
def describe_signature(self, signode: TextElement, mode: str,
env: "BuildEnvironment", symbol: "Symbol") -> None:
signode += addnodes.desc_sig_keyword('nullptr', 'nullptr')
class ASTBooleanLiteral(ASTLiteral):
def __init__(self, value: bool) -> None:
self.value = value
def _stringify(self, transform: StringifyTransform) -> str:
if self.value:
return 'true'
else:
return 'false'
def get_id(self, version: int) -> str:
if self.value:
return 'L1E'
else:
return 'L0E'
def describe_signature(self, signode: TextElement, mode: str,
env: "BuildEnvironment", symbol: "Symbol") -> None:
signode += addnodes.desc_sig_keyword(str(self), str(self))
class ASTNumberLiteral(ASTLiteral):
def __init__(self, data: str) -> None:
self.data = data
def _stringify(self, transform: StringifyTransform) -> str:
return self.data
def get_id(self, version: int) -> str:
# TODO: floats should be mangled by writing the hex of the binary representation
return "L%sE" % self.data.replace("'", "")
def describe_signature(self, signode: TextElement, mode: str,
env: "BuildEnvironment", symbol: "Symbol") -> None:
signode += addnodes.desc_sig_literal_number(self.data, self.data)
class ASTStringLiteral(ASTLiteral):
def __init__(self, data: str) -> None:
self.data = data
def _stringify(self, transform: StringifyTransform) -> str:
return self.data
def get_id(self, version: int) -> str:
# note: the length is not really correct with escaping
return "LA%d_KcE" % (len(self.data) - 2)
def describe_signature(self, signode: TextElement, mode: str,
env: "BuildEnvironment", symbol: "Symbol") -> None:
signode += addnodes.desc_sig_literal_string(self.data, self.data)
class ASTCharLiteral(ASTLiteral):
def __init__(self, prefix: str, data: str) -> None:
self.prefix = prefix # may be None when no prefix
self.data = data
assert prefix in _id_char_from_prefix
self.type = _id_char_from_prefix[prefix]
decoded = data.encode().decode('unicode-escape')
if len(decoded) == 1:
self.value = ord(decoded)
else:
raise UnsupportedMultiCharacterCharLiteral(decoded)
def _stringify(self, transform: StringifyTransform) -> str:
if self.prefix is None:
return "'" + self.data + "'"
else:
return self.prefix + "'" + self.data + "'"
def get_id(self, version: int) -> str:
# TODO: the ID should be have L E around it
return self.type + str(self.value)
def describe_signature(self, signode: TextElement, mode: str,
env: "BuildEnvironment", symbol: "Symbol") -> None:
if self.prefix is not None:
signode += addnodes.desc_sig_keyword(self.prefix, self.prefix)
txt = "'" + self.data + "'"
signode += addnodes.desc_sig_literal_char(txt, txt)
class ASTUserDefinedLiteral(ASTLiteral):
def __init__(self, literal: ASTLiteral, ident: ASTIdentifier):
self.literal = literal
self.ident = ident
def _stringify(self, transform: StringifyTransform) -> str:
return transform(self.literal) + transform(self.ident)
def get_id(self, version: int) -> str:
# mangle as if it was a function call: ident(literal)
return f'clL_Zli{self.ident.get_id(version)}E{self.literal.get_id(version)}E'
def describe_signature(self, signode: TextElement, mode: str,
env: "BuildEnvironment", symbol: "Symbol") -> None:
self.literal.describe_signature(signode, mode, env, symbol)
self.ident.describe_signature(signode, "udl", env, "", "", symbol)
################################################################################
class ASTThisLiteral(ASTExpression):
def _stringify(self, transform: StringifyTransform) -> str:
return "this"
def get_id(self, version: int) -> str:
return "fpT"
def describe_signature(self, signode: TextElement, mode: str,
env: "BuildEnvironment", symbol: "Symbol") -> None:
signode += addnodes.desc_sig_keyword('this', 'this')
class ASTFoldExpr(ASTExpression):
def __init__(self, leftExpr: ASTExpression,
op: str, rightExpr: ASTExpression) -> None:
assert leftExpr is not None or rightExpr is not None
self.leftExpr = leftExpr
self.op = op
self.rightExpr = rightExpr
def _stringify(self, transform: StringifyTransform) -> str:
res = ['(']
if self.leftExpr:
res.append(transform(self.leftExpr))
res.append(' ')
res.append(self.op)
res.append(' ')
res.append('...')
if self.rightExpr:
res.append(' ')
res.append(self.op)
res.append(' ')
res.append(transform(self.rightExpr))
res.append(')')