// initiates parsing of DLL into statements
public bool Parse(String ddl)
{
this.ddl = new Parsable(ddl);
while (this.ddl.Length > 0)
{
this.ShowParsingInfo();
try {
if (this.ParseComment())
{
continue;
}
if (this.ddl.Length == 0 || this.ParseStatement())
{
continue;
}
// failed to parse a comment or a statement, skip up to end of statement
// to skip garbage. comments are no problem
throw new ParseException(
"-->" + this.ddl.ConsumeUpTo(";", include: true)
);
} catch (ParseException e) {
// track exception and continue parsing
this.errors.Add(e);
}
}
return(true);
}
public void testConsumeUpTo()
{
Parsable text = new Parsable(" 123 456;789");
Assert.AreEqual(text.ConsumeUpTo(";"), "123 456");
Assert.AreEqual(text.Length, 4);
}
public void testSkipLeadingWhitespace()
{
Parsable text = new Parsable(" \t\r\n123456789");
text.SkipLeadingWhitespace();
Assert.AreEqual(text.Length, 9);
}
public void testFullyQualifiedName()
{
QualifiedName qn = new Parsable(" hello.world").ConsumeQualifiedName();
Assert.AreEqual("hello", qn.Scope);
Assert.AreEqual("world", qn.Name);
Assert.AreEqual("hello.world", qn.ToString());
}
public void testSimpleQualifiedName()
{
QualifiedName qn = new Parsable(" hello").ConsumeQualifiedName();
Assert.IsNull(qn.Scope);
Assert.AreEqual("hello", qn.Name);
Assert.AreEqual("hello", qn.ToString());
}
public void testImplicitConstructorBehaviour()
{
Parsable text = new Parsable(" \t\r\n123456789");
// NOTE: \r is discards
// repeated whitespace (space and tab) are replaced by single space
Assert.AreEqual(text.Length, 11);
}
