Ivy Language BNF

April 9, 2018

Contract ::= contract Identifier ( Parameters) {
Clause+
}

Clause ::= clause Identifier ( Parameters) {
Statement+
}

Statement ::= Assertion | Unlock

Assertion ::= verify Expression1

Unlock ::= unlock VariableExpression

Expression1 ::= ComparisonExpression | Expression2

Expression2 ::= CallExpression | Literal | VariableExpression
| ( Expression1 )

Literal ::= ListLiteral | BooleanLiteral | IntegerLiteral

IntegerLiteral ::= n | -n

ComparisonExpression ::= Expression2 ComparisonOperator Expressions2

ComparisonOperator ::= Operator

CallExpression ::= FunctionIdentifier ( Expressions )

VariableExpression ::= Identifier

Expressions ::= Expression1, Expressions | Expression | Nothing

ListLiteral ::= [ Expressions ]

BooleanLiteral ::= true | false

Identifiers ::= Identifier, Identifiers | Identifier | Nothing

Parameters ::= Parameter, Parameters | Parameter | Nothing

Parameter ::= Identifier : Type

Type ::= PrimitiveType | HashType

PrimitiveType ::= Identifier

HashFunctionType ::= Identifier

HashType ::= HashFunctionType ( HashableType )

HashableType ::= "Bytes" | "PublicKey" | HashType

Identifier ::= s

FunctionIdentifier ::= Identifier . Identifier

Nothing ::= $$\epsilon$$

Operator ::= != | ==