private static FlowScriptParser.CompilationUnitContext ParseCompilationUnit(AntlrInputStream inputStream, IAntlrErrorListener <IToken> errorListener = null)
{
var lexer = new FlowScriptLexer(inputStream);
var tokenStream = new CommonTokenStream(lexer);
// parser
var parser = new FlowScriptParser(tokenStream);
parser.BuildParseTree = true;
//parser.ErrorHandler = new BailErrorStrategy();
parser.ErrorHandler = new DefaultErrorStrategy();
if (errorListener != null)
{
parser.RemoveErrorListeners();
parser.AddErrorListener(errorListener);
}
var cst = parser.compilationUnit();
return(cst);
}
public static Expression FromText(string source)
{
var lexer = new FlowScriptLexer(new AntlrInputStream(source));
var tokenStream = new CommonTokenStream(lexer);
// parse expression
var parser = new FlowScriptParser(tokenStream);
parser.BuildParseTree = true;
var expressionParseTree = parser.expression();
// parse ast nodes
var compilationUnitParser = new CompilationUnitParser();
compilationUnitParser.TryParseExpression(expressionParseTree, out var expression);
// resolve types
var typeResolver = new TypeResolver();
typeResolver.TryResolveTypesInExpression(expression);
return(expression);
}