public void TestRealLiteral()
{
var programSource = new TokenList()
{
{ TokenType.Identifier, "x" },
{ TokenType.OpAssignment },
{ TokenType.RealLiteral, "2.4e3" }
};
Parser parser = new Parser(CreateMockScanner(programSource), new ErrorHandler());
ProgramNode program = parser.Parse();
var expr = new IntLiteralExpr(0, 0, 5);
expr.Sign = ExprSign.Minus;
var assignment = new AssignmentStmt(0, 0);
assignment.Variable = new VariableExpr(0, 0, "x");
assignment.AssignmentExpr = new RealLiteralExpr(0, 0, 2400);
expected.Block.Statements.Add(assignment);
program.ShouldBeEquivalentTo(expected);
}
private Expression ParseFactor()
{
if (Accept(Token.Types.IntLiteral))
{
IntLiteralExpr exp = new IntLiteralExpr(AcceptedToken.Line, AcceptedToken.Column);
exp.ExprValue = int.Parse(AcceptedToken.Content);
return exp;
}
else if (Accept(Token.Types.StringLiteral))
{
StringLiteralExpr expr = new StringLiteralExpr(AcceptedToken.Line, AcceptedToken.Column);
expr.ExprValue = AcceptedToken.Content;
return expr;
}
else if (Accept(Token.Types.Identifier))
{
IdentifierExpr node = new IdentifierExpr(AcceptedToken.Line, AcceptedToken.Column, AcceptedToken.Content);
return node;
}
else if (Accept(Token.Types.LParen))
{
Expression exp = ParseExpression();
Match(Token.Types.RParen);
return exp;
}
else throw new ParserException(String.Format("Expected literal or identifier, got {0} instead at line {1} column {2}.",
CurrentToken.Type, CurrentToken.Line, CurrentToken.Column));
}
public void Visit(IntLiteralExpr intLiteralExpr)
{
PrintNode("Int " + intLiteralExpr.ExprValue.ToString(), true);
}