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Sébastien Geiser
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More backtracking management to improve Regex performances
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‎CodingSeb.ExpressionEvaluator/ExpressionEvaluator.cs

Lines changed: 15 additions & 15 deletions
Original file line numberDiff line numberDiff line change
@@ -31,7 +31,7 @@ public class ExpressionEvaluator
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private const string diactitics = "áàâãåǎăāąæéèêëěēĕėęěìíîïīĭįijóôõöōŏőøðœùúûüǔũūŭůűųýþÿŷıćĉċčçďđĝğġģĥħĵķĺļľŀłńņňŋñŕŗřśŝşšţťŧŵźżžÁÀÂÃÅǍĂĀĄÆÉÈÊËĚĒĔĖĘĚÌÍÎÏĪĬĮIJÓÔÕÖŌŎŐØÐŒÙÚÛÜǓŨŪŬŮŰŲÝÞŸŶIĆĈĊČÇĎĐĜĞĠĢĤĦĴĶĹĻĽĿŁŃŅŇŊÑŔŖŘŚŜŞŠŢŤŦŴŹŻŽß";
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private const string diactiticsKeywordsRegexPattern = "a-zA-Z_" + diactitics;
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34-
private static readonly Regex varOrFunctionRegEx = new Regex($@"^((?<sign>[+-])|(?<prefixOperator>[+][+]|--)|(?<inObject>(?<nullConditional>[?])?\.)?)(?<name>[{ diactiticsKeywordsRegexPattern }][{ diactiticsKeywordsRegexPattern }0-9]*)\s*((?<assignationOperator>(?<assignmentPrefix>[+\-*/%&|^]|<<|>>)?=(?![=>]))|(?<postfixOperator>([+][+]|--)(?![{ diactiticsKeywordsRegexPattern}0-9]))|((?<isgeneric>[<](?>[^<>]+|(?<gentag>[<])|(?<-gentag>[>]))*(?(gentag)(?!))[>])?(?<isfunction>[(])?))", RegexOptions.IgnoreCase | RegexOptions.Compiled);
34+
private static readonly Regex varOrFunctionRegEx = new Regex($@"^((?<sign>[+-])|(?<prefixOperator>[+][+]|--)|(?<inObject>(?<nullConditional>[?])?\.)?)(?<name>[{ diactiticsKeywordsRegexPattern }](?>[{ diactiticsKeywordsRegexPattern }0-9]*))(?>\s*)((?<assignationOperator>(?<assignmentPrefix>[+\-*/%&|^]|<<|>>)?=(?![=>]))|(?<postfixOperator>([+][+]|--)(?![{ diactiticsKeywordsRegexPattern}0-9]))|((?<isgeneric>[<](?>[^<>]+|(?<gentag>[<])|(?<-gentag>[>]))*(?(gentag)(?!))[>])?(?<isfunction>[(])?))", RegexOptions.IgnoreCase | RegexOptions.Compiled);
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private const string numberRegexOrigPattern = @"^(?<sign>[+-])?([0-9][0-9_{1}]*[0-9]|\d)(?<hasdecimal>{0}?([0-9][0-9_]*[0-9]|\d)(e[+-]?([0-9][0-9_]*[0-9]|\d))?)?(?<type>ul|[fdulm])?";
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private string numberRegexPattern = null;
@@ -40,24 +40,24 @@ public class ExpressionEvaluator
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private static readonly Regex stringBeginningRegex = new Regex("^(?<interpolated>[$])?(?<escaped>[@])?[\"]", RegexOptions.Compiled);
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private static readonly Regex internalCharRegex = new Regex(@"^['](\\[\\'0abfnrtv]|[^'])[']", RegexOptions.Compiled);
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private static readonly Regex indexingBeginningRegex = new Regex(@"^[?]?\[", RegexOptions.Compiled);
43-
private static readonly Regex assignationOrPostFixOperatorRegex = new Regex(@"^\s*((?<assignmentPrefix>[+\-*/%&|^]|<<|>>)?=(?![=>])|(?<postfixOperator>([+][+]|--)(?![" + diactiticsKeywordsRegexPattern + @"0-9])))");
43+
private static readonly Regex assignationOrPostFixOperatorRegex = new Regex(@"^(?>\s*)((?<assignmentPrefix>[+\-*/%&|^]|<<|>>)?=(?![=>])|(?<postfixOperator>([+][+]|--)(?![" + diactiticsKeywordsRegexPattern + @"0-9])))");
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private static readonly Regex genericsDecodeRegex = new Regex("(?<name>[^,<>]+)(?<isgeneric>[<](?>[^<>]+|(?<gentag>[<])|(?<-gentag>[>]))*(?(gentag)(?!))[>])?", RegexOptions.Compiled);
45-
private static readonly Regex genericsEndOnlyOneTrim = new Regex(@"\s+[>]\s+$", RegexOptions.Compiled);
45+
private static readonly Regex genericsEndOnlyOneTrim = new Regex(@"(?>\s*)[>](?>\s*)$", RegexOptions.Compiled);
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private static readonly Regex endOfStringWithDollar = new Regex("^([^\"{\\\\]|\\\\[\\\\\"0abfnrtv])*[\"{]", RegexOptions.Compiled);
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private static readonly Regex endOfStringWithoutDollar = new Regex("^([^\"\\\\]|\\\\[\\\\\"0abfnrtv])*[\"]", RegexOptions.Compiled);
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private static readonly Regex endOfStringWithDollarWithAt = new Regex("^[^\"{]*[\"{]", RegexOptions.Compiled);
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private static readonly Regex endOfStringWithoutDollarWithAt = new Regex("^[^\"]*[\"]", RegexOptions.Compiled);
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private static readonly Regex endOfStringInterpolationRegex = new Regex("^('\"'|[^}\"])*[}\"]", RegexOptions.Compiled);
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private static readonly Regex stringBeginningForEndBlockRegex = new Regex("[$]?[@]?[\"]$", RegexOptions.Compiled);
53-
private static readonly Regex lambdaExpressionRegex = new Regex($@"^\s*(?<args>(\s*[(]\s*([{ diactiticsKeywordsRegexPattern }][{ diactiticsKeywordsRegexPattern }0-9]*\s*([,]\s*[{diactiticsKeywordsRegexPattern}][{ diactiticsKeywordsRegexPattern}0-9]*\s*)*)?[)])|[{ diactiticsKeywordsRegexPattern}][{ diactiticsKeywordsRegexPattern }0-9]*)\s*=>(?<expression>.*)$", RegexOptions.Singleline | RegexOptions.Compiled);
54-
private static readonly Regex lambdaArgRegex = new Regex($@"[{ diactiticsKeywordsRegexPattern }][{ diactiticsKeywordsRegexPattern }0-9]*", RegexOptions.Compiled);
55-
private static readonly Regex initInNewBeginningRegex = new Regex(@"^\s*{", RegexOptions.Compiled);
56-
private static readonly Regex OtherDimentionArrayInNewBeginningRegex = new Regex(@"^\s*\[", RegexOptions.Compiled);
53+
private static readonly Regex lambdaExpressionRegex = new Regex($@"^(?>\s*)(?<args>((?>\s*)[(](?>\s*)([{ diactiticsKeywordsRegexPattern }](?>[{ diactiticsKeywordsRegexPattern }0-9]*)(?>\s*)([,](?>\s*)[{diactiticsKeywordsRegexPattern}][{ diactiticsKeywordsRegexPattern}0-9]*(?>\s*))*)?[)])|[{ diactiticsKeywordsRegexPattern}](?>[{ diactiticsKeywordsRegexPattern }0-9]*))(?>\s*)=>(?<expression>.*)$", RegexOptions.Singleline | RegexOptions.Compiled);
54+
private static readonly Regex lambdaArgRegex = new Regex($@"[{ diactiticsKeywordsRegexPattern }](?>[{ diactiticsKeywordsRegexPattern }0-9]*)", RegexOptions.Compiled);
55+
private static readonly Regex initInNewBeginningRegex = new Regex(@"^(?>\s*){", RegexOptions.Compiled);
56+
private static readonly Regex OtherDimentionArrayInNewBeginningRegex = new Regex(@"^(?>\s*)\[", RegexOptions.Compiled);
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// Depending on OptionInlineNamespacesEvaluationActive. Initialized in constructor
59-
private string InstanceCreationWithNewKeywordRegexPattern { get { return $@"^new\s+(?<name>[{ diactiticsKeywordsRegexPattern }][{ diactiticsKeywordsRegexPattern}0-9{ (OptionInlineNamespacesEvaluationActive ? @"\." : string.Empty) }]*)\s*(?<isgeneric>[<](?>[^<>]+|(?<gentag>[<])|(?<-gentag>[>]))*(?(gentag)(?!))[>])?\s*((?<isfunction>[(])|(?<isArray>\[)|(?<isInit>[{{]))?"; } }
60-
private string CastRegexPattern { get { return $@"^\(\s*(?<typeName>[{ diactiticsKeywordsRegexPattern }][{ diactiticsKeywordsRegexPattern }0-9{ (OptionInlineNamespacesEvaluationActive ? @"\." : string.Empty) }\[\]<>]*[?]?)\s*\)"; } }
59+
private string InstanceCreationWithNewKeywordRegexPattern { get { return $@"^new(?>\s*)(?<name>[{ diactiticsKeywordsRegexPattern }][{ diactiticsKeywordsRegexPattern}0-9{ (OptionInlineNamespacesEvaluationActive ? @"\." : string.Empty) }]*)(?>\s*)(?<isgeneric>[<](?>[^<>]+|(?<gentag>[<])|(?<-gentag>[>]))*(?(gentag)(?!))[>])?(?>\s*)((?<isfunction>[(])|(?<isArray>\[)|(?<isInit>[{{]))?"; } }
60+
private string CastRegexPattern { get { return $@"^\((?>\s*)(?<typeName>[{ diactiticsKeywordsRegexPattern }][{ diactiticsKeywordsRegexPattern }0-9{ (OptionInlineNamespacesEvaluationActive ? @"\." : string.Empty) }\[\]<>]*[?]?)(?>\s*)\)"; } }
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private const string primaryTypesRegexPattern = @"(?<=^|[^" + diactiticsKeywordsRegexPattern + @"])(?<primaryType>object|string|bool[?]?|byte[?]?|char[?]?|decimal[?]?|double[?]?|short[?]?|int[?]?|long[?]?|sbyte[?]?|float[?]?|ushort[?]?|uint[?]?|ulong[?]?|void)(?=[^a-zA-Z_]|$)";
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@@ -70,12 +70,12 @@ public class ExpressionEvaluator
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private static readonly Regex newLineCharsRegex = new Regex(@"\r\n|\r|\n", RegexOptions.Compiled);
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// For script only
73-
private static readonly Regex blockKeywordsBeginningRegex = new Regex(@"^\s*(?<keyword>while|for|foreach|if|else\s+if|catch)\s*[(]", RegexOptions.IgnoreCase | RegexOptions.Compiled);
74-
private static readonly Regex foreachParenthisEvaluationRegex = new Regex(@"^\s*(?<variableName>[" + diactiticsKeywordsRegexPattern + @"][" + diactiticsKeywordsRegexPattern + @"0-9]*)\s+(?<in>in)\s+(?<collection>.*)", RegexOptions.IgnoreCase| RegexOptions.Compiled);
75-
private static readonly Regex blockKeywordsWithoutParenthesesBeginningRegex = new Regex(@"^\s*(?<keyword>else|do|try|finally)(?![" + diactiticsKeywordsRegexPattern + @"0-9])", RegexOptions.IgnoreCase | RegexOptions.Compiled);
76-
private static readonly Regex blockBeginningRegex = new Regex(@"^\s*[{]", RegexOptions.Compiled);
77-
private static readonly Regex returnKeywordRegex = new Regex(@"^return(\s+|\()", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Compiled);
78-
private static readonly Regex nextIsEndOfExpressionRegex = new Regex(@"^\s*[;]", RegexOptions.Compiled);
73+
private static readonly Regex blockKeywordsBeginningRegex = new Regex(@"^(?>\s*)(?<keyword>while|for|foreach|if|else(?>\s*)if|catch)(?>\s*)[(]", RegexOptions.IgnoreCase | RegexOptions.Compiled);
74+
private static readonly Regex foreachParenthisEvaluationRegex = new Regex(@"^(?>\s*)(?<variableName>[" + diactiticsKeywordsRegexPattern + @"](?>[" + diactiticsKeywordsRegexPattern + @"0-9]*))(?>\s*)(?<in>in)(?>\s*)(?<collection>.*)", RegexOptions.IgnoreCase| RegexOptions.Compiled);
75+
private static readonly Regex blockKeywordsWithoutParenthesesBeginningRegex = new Regex(@"^(?>\s*)(?<keyword>else|do|try|finally)(?![" + diactiticsKeywordsRegexPattern + @"0-9])", RegexOptions.IgnoreCase | RegexOptions.Compiled);
76+
private static readonly Regex blockBeginningRegex = new Regex(@"^(?>\s*)[{]", RegexOptions.Compiled);
77+
private static readonly Regex returnKeywordRegex = new Regex(@"^return((?>\s*)|\()", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Compiled);
78+
private static readonly Regex nextIsEndOfExpressionRegex = new Regex(@"^(?>\s*)[;]", RegexOptions.Compiled);
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#endregion
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