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Дата и время
21/11/2024 15:40:47
next C++
Введение Основные типы и операции. Объявления Операторы Функции Классы, шаблоны, пространства имен Метапрограммирование Грамматика языка
Грамматика языка
```
prefix-operator:
one of '!' '-' '+'
??? parameter-direction
postfix-operator:
one of '++' '--' '*' '&' '~' '$' '...'
assignment-operator:
one of '=' '*=' '/=' '%=' '+=' '-=' '>>=' '<<=' '&=' '^=' '|='
primary-expression:
inspect-expression
id-expression
literal
'(' expression-list ','? ')'
unnamed-declaration
postfix-expression:
primary-expression
postfix-expression postfix-operator
postfix-expression '[' expression-list? ','? ']'
postfix-expression '(' expression-list? ','? ')'
postfix-expression '.' id-expression
prefix-expression:
postfix-expression
prefix-operator prefix-expression
TODO await-expression
TODO 'sizeof' '(' type-id ')'
TODO 'sizeof' '...' ( identifier ')'
TODO 'alignof' '(' type-id ')'
TODO throws-expression
multiplicative-expression:
is-as-expression
multiplicative-expression '*' is-as-expression
multiplicative-expression '/' is-as-expression
multiplicative-expression '%' is-as-expression
additive-expression:
multiplicative-expression
additive-expression '+' multiplicative-expression
additive-expression '-' multiplicative-expression
shift-expression:
additive-expression
shift-expression '<<' additive-expression
shift-expression '>>' additive-expression
compare-expression:
shift-expression
compare-expression '<=>' shift-expression
relational-expression:
compare-expression
relational-expression '<' compare-expression
relational-expression '>' compare-expression
relational-expression '<=' compare-expression
relational-expression '>=' compare-expression
equality-expression:
relational-expression
equality-expression '==' relational-expression
equality-expression '!=' relational-expression
bit-and-expression:
equality-expression
bit-and-expression '&' equality-expression
bit-xor-expression:
bit-and-expression
bit-xor-expression '^' bit-and-expression
bit-or-expression:
bit-xor-expression
bit-or-expression '|' bit-xor-expression
logical-and-expression:
bit-or-expression
logical-and-expression '&&' bit-or-expression
logical-or-expression:
logical-and-expression
logical-or-expression '||' logical-and-expression
assignment-expression:
logical-or-expression
assignment-expression assignment-operator logical-or-expression
expression:
assignment-expression
TODO try expression
expression-list:
parameter-direction? expression
expression-list ',' parameter-direction? expression
type-id:
type-qualifier-seq? qualified-id
type-qualifier-seq? unqualified-id
type-qualifier-seq:
type-qualifier
type-qualifier-seq type-qualifier
type-qualifier:
'const'
'*'
is-as-expression:
prefix-expression
is-as-expression is-type-constraint
is-as-expression is-value-constraint
is-as-expression as-type-cast
TODO type-id is-type-constraint
is-type-constraint:
'is' type-id
is-value-constraint:
'is' expression
as-type-cast:
'as' type-id
unqualified-id:
identifier
keyword
template-id
TODO operator-function-id
...
template-id:
identifier '<' template-arguments? '>'
template-arguments:
template-arguments ',' template-argument
template-argument:
'const' type-id
expression
type-id
qualified-id:
nested-name-specifier unqualified-id
member-name-specifier unqualified-id
nested-name-specifier:
'::'
unqualified-id '::'
member-name-specifier:
unqualified-id '.'
id-expression:
qualified-id
unqualified-id
literal:
integer-literal ud-suffix?
character-literal ud-suffix?
floating-point-literal ud-suffix?
string-literal ud-suffix?
boolean-literal ud-suffix?
pointer-literal ud-suffix?
user-defined-literal ud-suffix?
expression-statement:
expression ';'
expression
selection-statement:
'if' 'constexpr'? logical-or-expression compound-statement
'if' 'constexpr'? logical-or-expression compound-statement 'else' compound-statement
return-statement:
return expression? ';'
iteration-statement:
label? 'while' logical-or-expression next-clause? compound-statement
label? 'do' compound-statement next-clause? 'while' logical-or-expression ';'
label? 'for' expression next-clause? 'do' '(' parameter-declaration ')' statement
label:
identifier ':'
next-clause:
'next' assignment-expression
alternative:
alt-name? is-type-constraint '=' statement
alt-name? is-value-constraint '=' statement
alt-name? as-type-cast '=' statement
TODO alt-name:
unqualified-id ':'
inspect-expression:
'inspect' 'constexpr'? expression '{' alternative-seq? '}'
'inspect' 'constexpr'? expression '->' type-id '{' alternative-seq? '}'
alternative-seq:
alternative
alternative-seq alternative
jump-statement:
'break' identifier? ';'
'continue' identifier? ';'
using-statement:
'using' qualified-id ';'
'using' 'namespace' id-expression ';'
statement:
selection-statement
using-statement
inspect-expression
return-statement
jump-statement
iteration-statement
compound-statement
contract-statement
declaration
expression-statement
contract-statement:
contract ';'
TODO try-block
compound-statement:
'{' statement-seq? '}'
statement-seq:
statement
statement-seq statement
parameter-declaration:
this-specifier? parameter-direction? declaration
parameter-direction: one of
'in' 'copy' 'inout' 'out' 'move' 'forward'
this-specifier:
'implicit'
'virtual'
'override'
'final'
parameter-declaration-list:
'(' parameter-declaration-seq? ','? ')'
parameter-declaration-seq:
parameter-declaration
parameter-declaration-seq ',' parameter-declaration
contract:
contract-kind contract-group? ':' '(' logical-or-expression ')'
contract-kind contract-group? ':' '(' logical-or-expression ',' expression ')'
contract-group:
'<' id-expression contract-flags?'>'
contract-flags:
',' id-expression contract-flags?
contract-kind: one of
'pre' 'post' 'assert'
function-type:
parameter-declaration-list throws-specifier? return-list? contract-seq?
throws-specifier:
'throws'
return-list:
expression-statement
'->' parameter-direction? type-id
'->' parameter-declaration-list
contract-seq:
contract
contract-seq contract
unnamed-declaration:
':' meta-functions? template-parameters? function-type requires-clause? '=' statement
':' meta-functions? template-parameters? function-type statement
':' meta-functions? template-parameters? type-id? requires-clause? '=' statement
':' meta-functions? template-parameters? type-id
':' meta-functions? template-parameters? 'final'? 'type' requires-clause? '=' statement
':' 'namespace' '=' statement
meta-functions:
'@' id-expression
meta-functions '@' id-expression
requires-clause:
'requires' logical-or-expression
template-parameters:
'<' parameter-declaration-seq '>'
alias:
':' template-parameters? 'type' requires-clause? '==' type-id ';'
':' 'namespace' '==' id-expression ';'
':' template-parameters? type-id? requires-clause? '==' expression ';'
declaration:
access-specifier? identifier '...'? unnamed-declaration
access-specifier? identifier alias
access-specifier:
public
protected
private
declaration-seq:
declaration
declaration-seq declaration
translation-unit:
declaration-seq?
```
