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Merge pull request #17 from linq2db/issues_15_16
Release 2.5.2 candidate
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using System.Collections.Generic; | ||
using System.Globalization; | ||
using System.Text; | ||
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namespace LinqToDB.LINQPad | ||
{ | ||
// added temporary from https://github.com/linq2db/linq2db/pull/1393 | ||
internal static class CSharpTools | ||
{ | ||
/// <summary> | ||
/// Reserved words taken from | ||
/// <see href="https://msdn.microsoft.com/en-us/library/x53a06bb%28v=vs.140%29.aspx"/>. | ||
/// List actual for C# 7.3. | ||
/// Doesn't contain "using static", | ||
/// </summary> | ||
private static readonly ISet<string> _reservedWords | ||
= new HashSet<string>() | ||
{ | ||
"abstract", "as", "base", "bool", "break", "byte", "case", "catch", | ||
"char", "checked", "class", "const", "continue", "decimal", "default", "delegate", | ||
"do", "double", "else", "enum", "event", "explicit", "extern", "false", | ||
"finally", "fixed", "float", "for", "foreach", "goto", "if", "implicit", | ||
"in", "int", "interface", "internal", "is", "lock", "long", "namespace", | ||
"new", "null", "object", "operator", "out", "override", "params", "private", | ||
"protected", "public", "readonly", "ref", "return", "sbyte", "sealed", "short", | ||
"sizeof", "stackalloc", "static", "string", "struct", "switch", "this", "throw", | ||
"true", "try", "typeof", "uint", "ulong", "unchecked", "unsafe", "ushort", | ||
"using", "virtual", "void", "volatile", "while" | ||
}; | ||
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/// <summary> | ||
/// Contextual words taken from | ||
/// <see href="https://msdn.microsoft.com/en-us/library/x53a06bb%28v=vs.140%29.aspx"/>. | ||
/// List actual for C# 7.3. | ||
/// </summary> | ||
private static readonly ISet<string> _contextualWords | ||
= new HashSet<string>() | ||
{ | ||
"add", "alias", "ascending", "async", "await", "by", "descending", "dynamic", | ||
"equals", "from", "get", "global", "group", "into", "join", "let", | ||
"nameof", "on", "orderby", "partial", "remove", "select", "set", "unmanaged", | ||
"value", "var", "when", "where", "yield" | ||
}; | ||
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private static readonly ISet<UnicodeCategory> _otherCharsCategories; | ||
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private static readonly ISet<UnicodeCategory> _startCharCategories; | ||
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static CSharpTools() | ||
{ | ||
_startCharCategories = new HashSet<UnicodeCategory>() | ||
{ | ||
// Lu letter | ||
UnicodeCategory.UppercaseLetter, | ||
// Ll letter | ||
UnicodeCategory.LowercaseLetter, | ||
// Lt letter | ||
UnicodeCategory.TitlecaseLetter, | ||
// Lm letter | ||
UnicodeCategory.ModifierLetter, | ||
// Lo letter | ||
UnicodeCategory.OtherLetter, | ||
// Nl letter | ||
UnicodeCategory.LetterNumber | ||
}; | ||
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_otherCharsCategories = new HashSet<UnicodeCategory>(_startCharCategories) | ||
{ | ||
// Mn | ||
UnicodeCategory.NonSpacingMark, | ||
// Mc | ||
UnicodeCategory.SpacingCombiningMark, | ||
// Nd | ||
UnicodeCategory.DecimalDigitNumber, | ||
// Pc | ||
UnicodeCategory.ConnectorPunctuation, | ||
// Cf | ||
UnicodeCategory.Format | ||
}; | ||
} | ||
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/// <summary> | ||
/// Converts <paramref name="name"/> to valid C# identifier. | ||
/// </summary> | ||
public static string ToValidIdentifier(string name) | ||
{ | ||
if (name == null || name == string.Empty || name == "@") | ||
{ | ||
return "_"; | ||
} | ||
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if (_reservedWords.Contains(name) || _contextualWords.Contains(name)) | ||
{ | ||
return "@" + name; | ||
} | ||
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if (name.StartsWith("@")) | ||
{ | ||
if (_reservedWords.Contains(name.Substring(1)) || _contextualWords.Contains(name.Substring(1))) | ||
{ | ||
return name; | ||
} | ||
else | ||
{ | ||
name = name.Substring(1); | ||
} | ||
} | ||
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var sb = new StringBuilder(); | ||
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foreach (var chr in name) | ||
{ | ||
var cat = CharUnicodeInfo.GetUnicodeCategory(chr); | ||
if (sb.Length == 0 && !_startCharCategories.Contains(cat) && chr != '_') | ||
{ | ||
sb.Append("_"); | ||
} | ||
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if (sb.Length != 0 && !_otherCharsCategories.Contains(cat)) | ||
{ | ||
sb.Append("_"); | ||
} | ||
else | ||
{ | ||
sb.Append(chr); | ||
} | ||
} | ||
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if (sb.Length >= 2 && sb[0] == '_' && sb[1] == '_' && (sb.Length == 2 || sb[2] != '_')) | ||
{ | ||
sb.Insert(0, '_'); | ||
} | ||
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return sb.ToString(); | ||
} | ||
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public static string ToStringLiteral(string value) | ||
{ | ||
if (value == null) | ||
return "null"; | ||
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var sb = new StringBuilder("\""); | ||
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foreach (var chr in value) | ||
{ | ||
switch (chr) | ||
{ | ||
case '\t': sb.Append("\\t"); break; | ||
case '\n': sb.Append("\\n"); break; | ||
case '\r': sb.Append("\\r"); break; | ||
case '\\': sb.Append("\\\\"); break; | ||
case '"': sb.Append("\\\""); break; | ||
case '\0': sb.Append("\\0"); break; | ||
case '\u0085': | ||
case '\u2028': | ||
case '\u2029': | ||
sb.Append($"\\u{(ushort)chr:X4}"); break; | ||
default: sb.Append(chr); break; | ||
} | ||
} | ||
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sb.Append('"'); | ||
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return sb.ToString(); | ||
} | ||
} | ||
} |
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