Ich habe mit dem Hinzufügen von verschachtelten Erfassungsgruppen und benannten Gruppen mit Positionsinformationen herumgespielt. Sie können mit einigen Regex auf jsfiddle spielen... https://jsfiddle.net/smuchow1962/z5dj9gL0/
/*
Copyright (c) 2019 Steven A Muchow
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Enhanced RegEx JS processing
Adds position information for capture groups (nested ones too) AND named group items.
*/
class RegexContainer {
static _findCaptureGroupsInRegexTemplate(re, input) {
let refCount = 0; let matches = []; let res; let data;
re.lastIndex = 0;
while ((res = re.exec(input)) !== null) {
if (isCapturingStartItem(res[0])) {
refCount++;
data = {parent: 0, refCount: refCount, start: res.index};
if (res.groups.name) { data.name = res.groups.name; }
matches.push(data);
} else if (input.charAt(res.index) === ')') {
let idx = matches.length;
while (idx--) {
if (matches[idx].end === undefined) {
matches[idx].end = re.lastIndex;
matches[idx].source = input.substring(matches[idx].start, matches[idx].end);
break;
}
}
refCount--;
let writeIdx = idx;
while (idx--) {
if (matches[idx].refCount === refCount) {
matches[writeIdx].parent = idx + 1;
break;
}
}
}
}
matches.unshift({start: 0, end: input.length, source: input});
return matches;
function isCapturingStartItem(str) {
if (str !== '(') { return (str.search(/\(\?<\w/)!==-1); }
return true;
}
}
static execFull(re, input, foundCaptureItems) {
let result; let foundIdx; let groupName; const matches = [];
while ((result = re.exec(input)) !== null) {
let array = createCustomResultArray(result);
array.forEach((match, idx) => {
if (!idx) {
match.startPos = match.endPos = result.index;
match.endPos += result[0].length;
delete match.parent;
return;
}
let parentStr = array[match.parent].data;
foundIdx = (match.parent < idx - 1) ? parentStr.lastIndexOf(match.data) : parentStr.indexOf(match.data);
match.startPos = match.endPos = foundIdx + array[match.parent].startPos;
match.endPos += match.data.length;
if ((groupName = foundCaptureItems[idx].name)) { match.groupName = groupName; }
});
matches.push(array);
if (re.lastIndex === 0) { break; }
}
return matches;
function createCustomResultArray(result) {
let captureVar = 0;
return Array.from(result, (data) => {
return {data: data || '', parent: foundCaptureItems[captureVar++].parent,};
});
}
}
static mapCaptureAndNameGroups(inputRegexSourceString) {
let REGEX_CAPTURE_GROUPS_ANALYZER = /((((?<!\\)|^)\((\?((<(?<name>\w+)))|(\?<=.*?\))|(\?<!.*?\))|(\?!.*?\))|(\?=.*?\)))?)|((?<!\\)\)(([*+?](\?)?))?|({\d+(,)?(\d+)?})))/gm;
return RegexContainer._findCaptureGroupsInRegexTemplate(REGEX_CAPTURE_GROUPS_ANALYZER, inputRegexSourceString);
}
static exec(re, input) {
let foundCaptureItems = RegexContainer.mapCaptureAndNameGroups(re.source);
let res = RegexContainer.execFull(re, input, foundCaptureItems);
return {captureItems: foundCaptureItems, results: res};
}
}
let answers = [];
let regex = [
{ re: "[ \\t]*?\\[\\[(?<inner>\\s*(?<core>\\w(.|\\s)*?)\\s*?)]]", label: "NESTED Regex"},
{ re: "(?<context>((\\w)(\\w|-)*))((?<separator>( - ))?(?<type>(-|\\w)+)?\\s*(?<opt>(\\{.*}))?)?[\\t ]*", label: "simpler regex" },
]
let input = "[[ context1 ]] [[ context2 - with-style { andOpts : {data: 'some info'} } ]]";
regex.forEach( (item) => {
let re = new RegExp(item.re, 'gm');
let result = RegexContainer.exec(re,input);
result.label = item.label;
answers.push(result);
});
answers.forEach((answer,index) => {
console.log('==========================================================');
console.log('==== Item ' + index + ' label: ' + answer.label + ' regex: ' + answer.captureItems[0].source );
console.log('==========================================================\n\n');
let scannedItems = answer.results;
scannedItems.forEach( (match) => {
let full = match[0];
let mstr = full.data;
let substr = input.substring(full.startPos, full.endPos);
if (mstr !== substr) {
console.log('error in the parsing if you get here');
return;
}
console.log('==== Checking ' + mstr);
for (let i=1; i<match.length; i++) {
let capture = match[i];
if (capture.groupName) {
console.log(' ' + capture.groupName + ': ' + "```" + input.substring(capture.startPos,capture.endPos) + "```");
}
}
console.log('');
});
});
Architektur
- Nehmen Sie die Regex-Vorlage und identifizieren Sie die Capture-Gruppen, die sie erzeugen wird. Speichern Sie es als Array von Gruppenelementen und Verschachtelungsinformationen ab, um es in den erweiterten exec()-Aufruf einzuspeisen.
- Regex verwenden, um Erfassungsanfänge, nicht-erfassende Elemente, Erfassungsnamen und Erfassungsenden zu finden. Fallen Sie richtig für die gefürchteten \( und \) Elemente.
- nicht rekursive Prüfung von Erfassungselementen und ihren Eltern (mit Referenzzählung).
- Führen Sie exec() mit den oben ermittelten Erfassungsgruppeninformationen aus.
- Teilstring-Funktionen verwenden, um Daten für jede Erfassungsgruppe zu extrahieren
- für jedes gefundene Ergebnis alles in ein Array packen und das Array zurückschicken.
