public static bool Accept(this ParserContext context, string expected, bool caseSensitive, out SourceLocation? errorLocation, out char? errorChar) {
errorLocation = null;
errorChar = null;
using (context.StartTemporaryBuffer()) {
for (int i = 0; i < expected.Length; i++) {
if (CharsEqual(expected[i], context.CurrentCharacter, caseSensitive)) {
context.AcceptCurrent();
}
else {
errorLocation = context.CurrentLocation;
errorChar = context.CurrentCharacter;
context.RejectTemporaryBuffer();
return false;
}
}
context.AcceptTemporaryBuffer();
}
return true;
}
public static void AcceptLine(this ParserContext context, bool includeNewLineSequence) {
context.AcceptUntil('\r', '\n');
if (!includeNewLineSequence) {
return;
}
if (context.CurrentCharacter == '\r') {
context.AcceptCurrent();
if (context.CurrentCharacter == '\n') {
context.AcceptCurrent();
}
}
else if (context.CurrentCharacter == '\n') {
context.AcceptCurrent();
}
}
public static void AcceptCharacters(this ParserContext context, int number) {
for (int i = 0; i < number; i++) {
context.AcceptCurrent();
}
}
public static void AcceptNewLine(this ParserContext context) {
if (context.CurrentCharacter == '\n') {
context.AcceptCurrent();
}
else if (context.CurrentCharacter == '\r') {
context.AcceptCurrent();
if (context.CurrentCharacter == '\n') {
context.AcceptCurrent();
}
}
}
public static string AcceptUntil(this ParserContext context, SourceLocation location) {
var builder = new StringBuilder();
while (context.CurrentLocation < location) {
builder.Append(context.AcceptCurrent());
}
return builder.ToString();
}
