primary-expression: literal this ( expression ) id-expression lambda-expression fold-expression
id-expression: unqualified-id qualified-id
unqualified-id: identifier operator-function-id conversion-function-id literal-operator-id ~ class-name ~ decltype-specifier template-id
qualified-id: nested-name-specifier templateopt unqualified-id
nested-name-specifier: :: type-name :: namespace-name :: decltype-specifier :: nested-name-specifier identifier :: nested-name-specifier templateopt simple-template-id ::
lambda-expression: lambda-introducer lambda-declaratoropt compound-statement
lambda-introducer: [ lambda-captureopt ]
lambda-declarator: ( parameter-declaration-clause ) decl-specifier-seqopt noexcept-specifieropt attribute-specifier-seqopt trailing-return-typeopt
lambda-capture: capture-default capture-list capture-default , capture-list
capture-default: & =
capture-list: capture ...opt capture-list , capture ...opt
capture: simple-capture init-capture
simple-capture: identifier & identifier this * this
init-capture: identifier initializer & identifier initializer
fold-expression: ( cast-expression fold-operator ... ) ( ... fold-operator cast-expression ) ( cast-expression fold-operator ... fold-operator cast-expression )
fold-operator: one of + - * / % ^ & | << >> += -= *= /= %= ^= &= |= <<= >>= = == != < > <= >= && || , .* ->*
postfix-expression: primary-expression postfix-expression [ expr-or-braced-init-list ] postfix-expression ( expression-listopt ) simple-type-specifier ( expression-listopt ) typename-specifier ( expression-listopt ) simple-type-specifier braced-init-list typename-specifier braced-init-list postfix-expression . templateopt id-expression postfix-expression -> templateopt id-expression postfix-expression . pseudo-destructor-name postfix-expression -> pseudo-destructor-name postfix-expression ++ postfix-expression -- dynamic_cast < type-id > ( expression ) static_cast < type-id > ( expression ) reinterpret_cast < type-id > ( expression ) const_cast < type-id > ( expression ) typeid ( expression ) typeid ( type-id )
expression-list: initializer-list
pseudo-destructor-name: nested-name-specifieropt type-name :: ~ type-name nested-name-specifier template simple-template-id :: ~ type-name ~ type-name ~ decltype-specifier
unary-expression: postfix-expression ++ cast-expression -- cast-expression unary-operator cast-expression sizeof unary-expression sizeof ( type-id ) sizeof ... ( identifier ) alignof ( type-id ) noexcept-expression new-expression delete-expression
unary-operator: one of * & + - ! ~
new-expression: ::opt new new-placementopt new-type-id new-initializeropt ::opt new new-placementopt ( type-id ) new-initializeropt
new-placement: ( expression-list )
new-type-id: type-specifier-seq new-declaratoropt
new-declarator: ptr-operator new-declaratoropt noptr-new-declarator
noptr-new-declarator: [ expression ] attribute-specifier-seqopt noptr-new-declarator [ constant-expression ] attribute-specifier-seqopt
new-initializer: ( expression-listopt ) braced-init-list
delete-expression: ::opt delete cast-expression ::opt delete [ ] cast-expression
noexcept-expression: noexcept ( expression )
cast-expression: unary-expression ( type-id ) cast-expression
pm-expression: cast-expression pm-expression .* cast-expression pm-expression ->* cast-expression
multiplicative-expression: pm-expression multiplicative-expression * pm-expression multiplicative-expression / pm-expression multiplicative-expression % pm-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
relational-expression: shift-expression relational-expression < shift-expression relational-expression > shift-expression relational-expression <= shift-expression relational-expression >= shift-expression
equality-expression: relational-expression equality-expression == relational-expression equality-expression != relational-expression
and-expression: equality-expression and-expression & equality-expression
exclusive-or-expression: and-expression exclusive-or-expression ^ and-expression
inclusive-or-expression: exclusive-or-expression inclusive-or-expression | exclusive-or-expression
logical-and-expression: inclusive-or-expression logical-and-expression && inclusive-or-expression
logical-or-expression: logical-and-expression logical-or-expression || logical-and-expression
conditional-expression: logical-or-expression logical-or-expression ? expression : assignment-expression
throw-expression: throw assignment-expressionopt
assignment-expression: conditional-expression logical-or-expression assignment-operator initializer-clause throw-expression
assignment-operator: one of = *= /= %= += -= >>= <<= &= ^= |=
expression: assignment-expression expression , assignment-expression
constant-expression: conditional-expression