/// <summary>
/// Matches a JSON value: a "string", null, a number (double value), true or false.
/// Not error is set if match fails.
/// </summary>
/// <param name="this">This <see cref="StringMatcher"/>.</param>
/// <param name="value">The parsed value. Can be null.</param>
/// <returns>True if a JSON value has been matched, false otherwise.</returns>
public static bool TryMatchJSONValue(this StringMatcher @this, out object value)
{
string s;
if (@this.TryMatchJSONQuotedString(out s, true))
{
value = s;
return(true);
}
double d;
if (@this.TryMatchDoubleValue(out d))
{
value = d;
return(true);
}
if (@this.TryMatchText("true"))
{
value = true;
return(true);
}
if (@this.TryMatchText("false"))
{
value = false;
return(true);
}
value = null;
return(false);
}
/// <summary>
/// Visits a comma seprarated list of "property" : ... fields until a closing } is found
/// or <see cref="Matcher"/>.<see cref="StringMatcher.IsEnd">IsEnd</see> becomes true.
/// </summary>
/// <returns>True on success. On error a message may be retrieved from the <see cref="Matcher"/>.</returns>
public virtual bool VisitObjectContent()
{
int propertyNumber = 0;
while (!_m.IsEnd)
{
SkipWhiteSpaces();
if (_m.TryMatchChar('}'))
{
return(true);
}
int startPropertyIndex = _m.StartIndex;
string propName;
if (!_m.TryMatchJSONQuotedString(out propName))
{
return(false);
}
SkipWhiteSpaces();
if (!_m.MatchChar(':') || !VisitObjectProperty(startPropertyIndex, propName, propertyNumber))
{
return(false);
}
SkipWhiteSpaces();
// This accepts e trailing comma at the end of a property list: ..."a":0,} is not an error.
_m.TryMatchChar(',');
++propertyNumber;
}
return(false);
}
/// <summary>
/// Matches a JSON value: a "string", null, a number (double value), true or false.
/// This method ignores the actual value and does not set any error if match fails.
/// </summary>
/// <param name="this">This <see cref="StringMatcher"/>.</param>
/// <returns>True if a JSON value has been matched, false otherwise.</returns>
public static bool TryMatchJSONTerminalValue(this StringMatcher @this)
{
return(@this.TryMatchJSONQuotedString(true) ||
@this.TryMatchDoubleValue() ||
@this.TryMatchText("true") ||
@this.TryMatchText("false"));
}
/// <summary>
/// Matches a very simple version of a JSON object content: this match stops at the first closing }.
/// Whitespaces and JS comments (//... or /* ... */) are skipped.
/// </summary>
/// <param name="this">This <see cref="StringMatcher"/>.</param>
/// <param name="o">The read object on success as a list of KeyValuePair.</param>
/// <returns>True on success, false on error.</returns>
public static bool MatchJSONObjectContent(this StringMatcher @this, out List <KeyValuePair <string, object> > o)
{
o = null;
while ([email protected])
{
@this.SkipWhiteSpacesAndJSComments();
string propName;
object value;
if (@this.TryMatchChar('}'))
{
if (o == null)
{
o = new List <KeyValuePair <string, object> >();
}
return(true);
}
if ([email protected](out propName))
{
o = null;
return(@this.SetError("Quoted Property Name."));
}
@this.SkipWhiteSpacesAndJSComments();
if ([email protected](':') || !MatchJSONObject(@this, out value))
{
o = null;
return(false);
}
if (o == null)
{
o = new List <KeyValuePair <string, object> >();
}
o.Add(new KeyValuePair <string, object>(propName, value));
@this.SkipWhiteSpacesAndJSComments();
// This accepts e trailing comma at the end of a property list: ..."a":0,} is not an error.
@this.TryMatchChar(',');
}
return(@this.SetError("JSON object definition but reached end of match."));
}
