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User-defined operators: Parsing and grammar

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wechman
2023-02-22 00:06:17 +01:00
committed by Kamil Śliwak
parent 9a36438441
commit 9445483d60
2 changed files with 47 additions and 2 deletions
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docs/grammar/SolidityParser.g4
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@@ -311,11 +311,31 @@ errorDefinition:
LParen (parameters+=errorParameter (Comma parameters+=errorParameter)*)? RParen
Semicolon;
/**
* Operators that users are allowed to implement for some types with `using for`.
*/
userDefinableOperator:
BitAnd
| BitNot
| BitOr
| BitXor
| Add
| Div
| Mod
| Mul
| Sub
| Equal
| GreaterThan
| GreaterThanOrEqual
| LessThan
| LessThanOrEqual
| NotEqual;
/**
* Using directive to attach library functions and free functions to types.
* Can occur within contracts and libraries and at the file level.
*/
usingDirective: Using (identifierPath | (LBrace identifierPath (Comma identifierPath)* RBrace)) For (Mul | typeName) Global? Semicolon;
usingDirective: Using (identifierPath | (LBrace identifierPath (As userDefinableOperator)? (Comma identifierPath (As userDefinableOperator)?)* RBrace)) For (Mul | typeName) Global? Semicolon;
/**
* A type name can be an elementary type, a function type, a mapping type, a user-defined type
* (e.g. a contract or struct) or an array type.