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Begin fixing expression syntax

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This commit is contained in:
Nicolai 2016-07-23 01:45:10 +02:00
parent 1c341add59
commit 5512b85594
1 changed files with 18 additions and 14 deletions
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32
libsolidity/grammar.txt
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@ -7,12 +7,12 @@ Imports = StringLiteral ('as' Identifier)?
| ('*' | Identifier) ('as' Identifier)? 'from' StringLiteral
| '{' Identifier ('as' Identifier)? ( ',' Identifier ('as' Identifier)? )* '}' 'from' StringLiteral
ContractPart = StateVariableDeclaration | UsingDeclaration
ContractPart = StateVariableDecOrDef | UsingDeclaration
| StructDefinition | ModifierDefinition | FunctionDefinition | EventDefinition | EnumDefinition
InheritanceSpecifier = Identifier ( '(' Expression ( ',' Expression )* ')' )?
StateVariableDeclaration = TypeName ( 'public' | 'internal' | 'private' )? Identifier ';'
StateVariableDecOrDef = TypeName ( 'public' | 'internal' | 'private' )? Identifier ('=' Expression)? ';'
UsingDeclaration = 'using' Identifier 'for' TypeName ';'
StructDefinition = 'struct' Identifier '{'
( VariableDeclaration ';' (VariableDeclaration ';')* )? '}'
@ -37,9 +37,9 @@ ArrayTypeName = TypeName '[' Expression? ']'
Block = '{' Statement* '}'
Statement = IfStatement | WhileStatement | ForStatement | Block |
( Continue | Break | Return | Throw | VariableDefinition | ExpressionStatement ) ';'
( Continue | Break | Return | Throw | VardefOrExprStmt ) ';'
ExpressionStatement = Expression
ExpressionStatement = Expression | VariableDefinition | Assignment | 'delete' Expression
IfStatement = 'if' '(' Expression ')' Statement ( 'else' Statement )?
WhileStatement = 'while' '(' Expression ')' Statement
VardefOrExprStmt = VariableDefinition | ExpressionStatement
@ -49,27 +49,31 @@ Break = 'break'
Return = 'return' Expression?
Throw = 'throw'
VariableDefinition = VariableDeclaration ( '=' Expression )?
Assignment = Expression ('=' | '|=' | '^=' | '&=' | '<<=' | '>>=' | '+=' | '-=' | '*=' | '/=' | '%=') Expression
Expression = Assignment | UnaryOperation | BinaryOperation | FunctionCall | NewExpression | IndexAccess |
MemberAccess | PrimaryExpression
// The expression syntax is actually much more complicated
Assignment = Expression (AssignmentOp Expression)
AssignmentOp = '|=' | '^=' | '&=' | '<<=' | '>>=' | '+=' | '-=' | '*=' | '/=' | '%='
UnaryOperation = '!' | '~' | '++' | '--' | 'delete'
BinaryOperation = '|' | '^' | '&' | '<<' | '>>' | '+' | '-' | '*' | '/' | '%'
| '||' | '&&' | '**' | '==' | '!=' | '<' | '>' | '<=' | '>='
Expression =
('!' | '~' | '++' | '--') expression
| expression ('**' | '*' | '/' | '%') expression
| expression ('|' | '^' | '&' | '<<' | '>>') expression
| expression ('+' | '-') expression
| expression ('<=' | '>=' | '<' | '>') expression
| expression ('==' | '!=') expression
| expression ('&&' | '||') expression
| PrimaryExpression
PrimaryExpression = Identifier | BooleanLiteral | NumberLiteral | StringLiteral
| FunctionCall | MemberAccess | IndexAccess | '(' Expression ')'
FunctionCall = Identifier '(' Expression? ( ',' Expression )* ')'
NewExpression = 'new' Identifier
MemberAccess = Expression '.' Identifier
IndexAccess = Expression '[' Expression? ']'
PrimaryExpression = Identifier | BooleanLiteral | NumberLiteral | StringLiteral | ElementaryTypeName | '(' Expression ')'
BooleanLiteral = 'true' | 'false'
NumberLiteral = '0x'? [0-9]+ NumberUnit?
NumberUnit = 'wei' | 'szabo' | 'finney' | 'ether'
| 'seconds' | 'minutes' | 'hours' | 'days' | 'weeks' | 'years'
StringLiteral = '"' (~('"' | '\\' | '\r' | '\n') | '\\' ('"' | '\\'))* '"';
StringLiteral = '"' (~('"' | '\\' | '\r' | '\n') | '\\' ('"' | '\\'))* '"'
Identifier = [a-zA-Z_] [a-zA-Z_0-9]*
ElementaryTypeName = 'address' | 'bool' | 'string' | 'var'