式 
演算子優先順位 
- 上にあるほど優先が高い。
- ほぼCと同じ。
- 諸事情により一部の演算子は全角文字で記述してあります
カテゴリ | C演算子 | オリジナル | subscript | [ ] | | postfix | ++ -- | | unary_prefix | ++ -- + - ! ~ ( ) | | arithmetic_multiplicative | * / % | | arithmetic_additive | + - | | shift | >> << | | comparison_relational | < <= > >= | | comparison_equality | == != | | bitwise_and | & | | bitwise_xor | ^ | | bitwise_or | | | | boolean_and | && | | boolean_or | || | | conditional | ? : | | assignment | = += -= *= /= %= >>= <<= &= |= ^= | | sequence | , | |
ExpressionのEBNF 
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| UnaryOperator:
| "++"
| "--"
| "+"
| "-"
| "!"
| "~"
| "@"
NewExpression:
"new" TypePath FunctionCallExpression
DeleteExpression:
"delete" UnaryExpression
PrimaryExpression:
Identifier # ScopeRootIdentExpression
| "." Identifier # NamespaceRootIdentExpression
| ConstantLiteral
| "(" Expression ")"
IndexExpression:
"[" Expression "]"
FunctionCallExpression:
"(" SequenceExpression ")"
PostfixOperator:
"++"
| "--"
| IndexExpression
| FunctionCallExpression
| "." Identifier # ChildIdentExpression
PostfixExpression:
PrimaryExpression (PostfixOperator)*
CastExpression:
"cast" "(" TypePath ")" UnaryExpression
UnaryExpression:
(UnaryOperator)* (CastExpression | NewExpression | DeleteExpression | PostfixExpression)
MultiplicativeOperator:
"*"
| "/"
| "%"
MultiplicativeExpression:
CastExpression (MultiplicativeOperator CastExpression)*
AdditiveOperator:
"+"
| "-"
AdditiveExpression:
MultiplicativeExpression (AdditiveOperator MultiplicativeExpression)*
ShiftOperator:
">>"
| "<<"
ShiftExpression:
AdditiveExpression (ShiftOperator AdditiveExpression)*
RelationalOperator:
">"
| "<"
| "<="
| ">="
RelationalExpression:
ShiftExpression (RelationalOperator ShiftExpression)*
EqualityOperator:
"=="
| "!="
EqualityExpression:
RelationalExpression (EqulityOperator RelationalExpression)*
BitwiseAndOperator:
"&"
BitwiseAndExpression:
EqualityExpression (BitwiseAndOperator EqualityExpression )*
BitwiseXorOperator:
"^"
BitwiseXorExpression:
BitwiseAndExpression (BitwiseXorOperator BitwiseAndExpression)*
BitwiseOrOperator:
"|"
BitwiseOrExpression:
BitwiseXorExpression (BitwiseOrOperator BitwiseXorExpression)*
LogicalAndOperator:
"&&"
LogicalAndExpression:
BitwiseOrExpression (LogicalAndOperator BitwiseOrExpression)*
LogicalOrOperator:
"||"
LogicalOrExpression:
LogicalAndExpression (LogicalOrOperator LogicalAndExpression)*
ConditionalExpression:
LogicalOrExpression ("?" ConditionalExpression ":" ConditionalExpression)*
AssignmentOperator:
"="
| "+="
| "-="
| "*="
| "/="
| "%="
| ">>="
| "<<="
| "&="
| "|="
| "^="
AssignmentExpression:
(ConditionalExpression AssignmentOperator)* ConditionalExpression
Expression:
AssignmentExpression
SequenceOperator:
","
SequenceExpression:
Expression (SequenceOperator Expression)*
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