public void U8EscapeSequenceIsExtracted()
{
String input = "\"" + @"some\UABCD1234string" + "\"";
var parser = new BasicCStringScanner(input);
Assert.Equal(new StringPart(5,10), parser.Next());
Assert.Equal(null, parser.Next());
}
public StringPart?Next()
{
while (!text.EndOfLine)
{
if (text.Char() == '\\')
{
return(BasicCStringScanner.ParseEscapeSequence(text));
}
else if (text.Char() == '%')
{
// skip %%
if (text.NChar() == '%')
{
text.Skip(2);
continue;
}
StringPart part = new StringPart();
if (ParseFormatSpecifier(ref part))
{
return(part);
}
}
text.Next();
}
return(null);
}
public void EscapeInSingleQuotesIsExtracted()
{
String input = @"'some\rstring'";
var parser = new BasicCStringScanner(input);
Assert.Equal(new StringPart(5,2), parser.Next());
Assert.Equal(null, parser.Next());
}
public void EscapedBackslashIsExtractedCorrectly()
{
String input = "\"" + @"some\\string" + "\"";
var parser = new BasicCStringScanner(input);
Assert.Equal(new StringPart(5,2), parser.Next());
Assert.Equal(null, parser.Next());
}
public void TwoSeparateEscapeSequencesAreExtracted()
{
String input = "\"" + @"some\rother\nstring" + "\"";
var parser = new BasicCStringScanner(input);
Assert.Equal(new StringPart(5,2), parser.Next());
Assert.Equal(new StringPart(12,2), parser.Next());
Assert.Equal(null, parser.Next());
}
public StringPart?Next()
{
while (!text.EndOfLine)
{
if (text.Char() == '\\')
{
return(BasicCStringScanner.ParseEscapeSequence(text));
}
else if (text.Char() == '{' && text.NChar() == '{')
{
text.Next(); // skip it
}
else if (text.Char() == '{' && !isInterpolated)
{
StringPart part = new StringPart();
if (ParseFormatSpecifier(ref part))
{
return(part);
}
}
text.Next();
}
return(null);
}
public void NoEscapesReturnsNull()
{
String input = "\"some string\"";
var parser = new BasicCStringScanner(input);
Assert.Equal(null, parser.Next());
}