private Expression ParseConstantExpression()
{
ConstantKind kind;
if (current == "true" || current == "false")
{
kind = ConstantKind.Boolean;
}
else if (current == TokenKind.StringLiteral)
{
kind = ConstantKind.String;
}
else if (current == TokenKind.IntegerLiteral)
{
kind = ConstantKind.Integer;
}
else if (current == TokenKind.FloatLiteral)
{
kind = ConstantKind.Float;
}
else
{
throw UnexpectedToken("Constant");
}
var token = Take();
var expr = new ConstantExpression(token.Span, token.Value, kind);
statm.Add(expr);
return(expr);
}
protected abstract void VisitConstant(ConstantExpression expression);