init mod
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using System;
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using System.Collections.Generic;
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using Cthangover.Core.Factories.Impls;
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using Cthangover.Core.Localization;
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using Cthangover.Mods.Dialog;
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using Cthangover.Mods.Dialog.Action.Impls;
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using Cthangover.Core.UI;
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using Cthangover.Mods.Interface.Base.Lists;
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using Cthangover.Core.UI.Dialog;
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using Cthangover.Core.UI.Event;
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using Cthangover.Core.UI.Executable;
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using Cthangover.Core.Scenarios;
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using Cthangover.Core.Scenes;
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using Cthangover.Core.Interactive;
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namespace Cthangover.Mods.Dialog.Scenarios
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{
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/// <summary>
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/// Parses scenario DSL script text into a <see cref="DialogQueue"/> of dialog actions.
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/// The pipeline works in two phases: first the text is split into lines, then each
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/// non-empty, non-comment line is tokenized and dispatched to the matching
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/// <see cref="IScenarioCommandStrategy"/> via <see cref="ScenarioCommandStrategyFactory"/>.
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/// Special handling exists for <c>:label</c> anchor points, <c>select/option</c>
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/// blocks (accumulated into <see cref="ActionSelect"/>), and <c>-></c> arrow targets.
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/// </summary>
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public static class ScenarioParser
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{
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/// <summary>
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/// Parses a complete scenario script text and returns the resulting dialog queue.
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/// </summary>
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/// <param name="text">Raw scenario DSL content.</param>
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/// <param name="locale">Optional localization provider for <c>key=</c> text lookups.</param>
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public static DialogQueue Parse(string text, ILocalizationProvider locale = null)
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{
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var dlg = new DialogQueue();
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var lines = text.Split('\n');
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ActionSelect pendingSelect = null;
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foreach (var rawLine in lines)
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{
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var line = rawLine.Trim();
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if (line.Length == 0 || line.StartsWith('#'))
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{
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FinalizePendingSelect(dlg, ref pendingSelect);
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continue;
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}
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if (line.StartsWith(':'))
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{
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FinalizePendingSelect(dlg, ref pendingSelect);
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dlg.Point(line.Substring(1));
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continue;
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}
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var tokens = Tokenize(line);
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if (tokens.Count == 0) continue;
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var cmd = tokens[0].ToLowerInvariant();
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tokens.RemoveAt(0);
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var positional = new List<string>();
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var named = new Dictionary<string, string>();
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var arrowTarget = "";
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for (var i = 0; i < tokens.Count; i++)
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{
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var t = tokens[i];
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if (t == "->")
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{
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if (i + 1 < tokens.Count)
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{
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arrowTarget = tokens[i + 1].TrimStart(':');
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i++;
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}
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continue;
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}
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var eqIdx = t.IndexOf('=');
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if (eqIdx > 0)
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{
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var name = t.Substring(0, eqIdx);
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if (IsValidIdent(name))
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{
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named[name.ToLowerInvariant()] = t.Substring(eqIdx + 1);
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continue;
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}
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}
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positional.Add(t);
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}
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if (cmd == "select")
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{
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FinalizePendingSelect(dlg, ref pendingSelect);
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pendingSelect = new ActionSelect();
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var promptText = positional.Count > 0 ? positional[0] : null;
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if (named.TryGetValue("key", out var key) && locale != null)
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{
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var loc = locale.Get(key);
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if (loc != null) promptText = loc;
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}
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if (promptText != null)
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pendingSelect.Text = promptText;
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if (named.TryGetValue("first", out var first))
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pendingSelect.FirstAvatar = first;
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if (named.TryGetValue("second", out var second))
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pendingSelect.SecondAvatar = second;
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continue;
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}
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if (cmd == "option")
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{
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if (pendingSelect == null) continue;
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var optText = positional.Count > 0 ? positional[0] : "";
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if (named.TryGetValue("key", out var key) && locale != null)
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{
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var loc = locale.Get(key);
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if (loc != null) optText = loc;
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}
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var goTo = arrowTarget;
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if (string.IsNullOrEmpty(goTo))
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{
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if (named.TryGetValue("goto", out var gt))
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goTo = gt;
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else if (positional.Count > 1 && positional[1].StartsWith(':'))
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goTo = positional[1].TrimStart(':');
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}
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if (pendingSelect.Variants == null)
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pendingSelect.Variants = new List<SelectVariant>();
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pendingSelect.Variants.Add(SelectVariant.New(optText, goTo));
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continue;
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}
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FinalizePendingSelect(dlg, ref pendingSelect);
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var strategy = ScenarioCommandStrategyFactory.Get(cmd);
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if (strategy != null)
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strategy.Execute(dlg, positional, named, arrowTarget, locale);
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}
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FinalizePendingSelect(dlg, ref pendingSelect);
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return dlg;
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}
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/// <summary>
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/// Extracts YAML-like front-matter metadata from script text. Lines before
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/// a <c>---</c> separator or the first non-key:value line are parsed as
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/// <c>key: value</c> pairs. Returns both the metadata dictionary and the
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/// remaining script content after the metadata block.
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/// </summary>
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public static (Dictionary<string, string> metadata, string remainingText) ParseMetadata(string text)
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{
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var metadata = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
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var lines = text.Split('\n');
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var contentStart = 0;
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var inMetadata = true;
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for (var i = 0; i < lines.Length; i++)
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{
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var line = lines[i].Trim();
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if (!inMetadata)
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{
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continue;
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}
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if (line == "---")
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{
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contentStart = i + 1;
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break;
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}
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if (string.IsNullOrEmpty(line))
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{
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contentStart = i;
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break;
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}
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var colonIdx = line.IndexOf(':');
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if (colonIdx > 0)
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{
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var key = line.Substring(0, colonIdx).Trim();
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var val = line.Substring(colonIdx + 1).Trim();
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metadata[key] = val;
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}
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else
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{
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contentStart = i;
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break;
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}
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}
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var remaining = string.Join("\n", lines, contentStart, lines.Length - contentStart);
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return (metadata, remaining);
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}
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private static void FinalizePendingSelect(DialogQueue dlg, ref ActionSelect pending)
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{
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if (pending == null) return;
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if (pending.Variants == null || pending.Variants.Count == 0)
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{
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pending = null;
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return;
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}
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dlg.Queue.Add(pending);
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pending = null;
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}
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private static List<string> Tokenize(string line)
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{
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var result = new List<string>();
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var i = 0;
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while (i < line.Length)
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{
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if (char.IsWhiteSpace(line[i]))
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{
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i++;
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continue;
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}
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if (line[i] == '"')
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{
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i++;
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var start = i;
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while (i < line.Length && line[i] != '"')
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{
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if (line[i] == '\\' && i + 1 < line.Length)
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i++;
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i++;
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}
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result.Add(line[start..i].Replace("\\\"", "\""));
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if (i < line.Length) i++;
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continue;
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}
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var tokenStart = i;
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while (i < line.Length && !char.IsWhiteSpace(line[i]))
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i++;
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result.Add(line[tokenStart..i]);
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}
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return result;
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}
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private static bool IsValidIdent(string s)
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{
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if (string.IsNullOrEmpty(s)) return false;
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for (var i = 0; i < s.Length; i++)
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{
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var c = s[i];
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if (!char.IsLetterOrDigit(c) && c != '_')
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return false;
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}
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return true;
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}
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}
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}
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