I generated Parser for the Go Language from Antlr4 grammar.
Grammar is here: https://raw.githubusercontent.com/antlr/grammars-v4/master/solidity/Solidity.g4
I generate parser as follows: java -jar $PWD/antlr-4.7.1-complete.jar -Dlanguage=Go -o parser syntax/Solidity.g4
The generated solidity_parser.go
file has the following error whereever listener.(SolidityListener)
shows up:
Invalid type assertion: listener.(SolidityListener) (non-interface type antlr.ParseTreeListener on left)
Code snippet:
func (s *SourceUnitContext) EnterRule(listener antlr.ParseTreeListener) {
if listenerT, ok := listener.(SolidityListener); ok { // <-- here is the error
listenerT.EnterSourceUnit(s)
}
}
What could be the problem?