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ContractDefinition = 'contract' Identifier
( 'is' InheritanceSpecifier (',' InheritanceSpecifier )* )?
'{' ContractPart* '}'
ContractPart = StateVariableDeclaration | StructDefinition | ModifierDefinition | FunctionDefinition
InheritanceSpecifier = Identifier ( '(' Expression ( ',' Expression )* ')' )?
StructDefinition = 'struct' Identifier '{'
( VariableDeclaration (';' VariableDeclaration)* )? '}
StateVariableDeclaration = TypeName ( 'public' | 'protected' | 'private' )? Identifier ';'
ModifierDefinition = 'modifier' Identifier ParameterList? Block
FunctionDefinition = 'function' Identifier ParameterList
( Identifier | 'constant' | 'public' | 'protected' | 'private' )*
( 'returns' ParameterList )? Block
ParameterList = '(' ( VariableDeclaration (',' VariableDeclaration)* )? ')'
// semantic restriction: mappings and structs (recursively) containing mappings
// are not allowed in argument lists
VariableDeclaration = TypeName Identifier
TypeName = ElementaryTypeName | Identifier | Mapping
Mapping = 'mapping' '(' ElementaryTypeName '=>' TypeName ')'
Block = '{' Statement* '}'
Statement = IfStatement | WhileStatement | Block |
( Continue | Break | Return | VariableDefinition | ExpressionStatement ) ';'
ExpressionStatement = Expression
IfStatement = 'if' '(' Expression ')' Statement ( 'else' Statement )?
WhileStatement = 'while' '(' Expression ')' Statement
VardefOrExprStmt = Variabledefinition | ExpressionStatement
ForStatement = 'for' '(' (VardefOrExprStmt)? ';' (Expression)? ';' (ExpressionStatement)? ')' Statement
Continue = 'continue' ';'
Break = 'break' ';'
Return = 'return' Expression? ';'
VariableDefinition = VariableDeclaration ( = Expression )? ';'
Expression = Assignment | UnaryOperation | BinaryOperation | FunctionCall | NewExpression | IndexAccess |
MemberAccess | PrimaryExpression
// The expression syntax is actually much more complicated
Assignment = Expression (AssignmentOp Expression)
FunctionCall = Expression '(' Expression ( ',' Expression )* ')'
NewExpression = 'new' Identifier
MemberAccess = Expression '.' Identifier
IndexAccess = Expression '[' Expresison ']'
PrimaryExpression = Identifier | NumberLiteral | StringLiteral | ElementaryTypeName | '(' Expression ')'
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