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LibRegex: Implement section B.1.4. of the ECMA262 spec
This allows the parser to deal with crazy patterns like the one in #5517.
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7 changed files with 382 additions and 91 deletions
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@ -39,22 +39,23 @@ namespace regex {
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using FlagsUnderlyingType = u16;
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enum class AllFlags {
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Global = __Regex_Global, // All matches (don't return after first match)
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Insensitive = __Regex_Insensitive, // Case insensitive match (ignores case of [a-zA-Z])
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Ungreedy = __Regex_Ungreedy, // The match becomes lazy by default. Now a ? following a quantifier makes it greedy
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Unicode = __Regex_Unicode, // Enable all unicode features and interpret all unicode escape sequences as such
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Extended = __Regex_Extended, // Ignore whitespaces. Spaces and text after a # in the pattern are ignored
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Extra = __Regex_Extra, // Disallow meaningless escapes. A \ followed by a letter with no special meaning is faulted
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MatchNotBeginOfLine = __Regex_MatchNotBeginOfLine, // Pattern is not forced to ^ -> search in whole string!
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MatchNotEndOfLine = __Regex_MatchNotEndOfLine, // Don't Force the dollar sign, $, to always match end of the string, instead of end of the line. This option is ignored if the Multiline-flag is set
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SkipSubExprResults = __Regex_SkipSubExprResults, // Do not return sub expressions in the result
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StringCopyMatches = __Regex_StringCopyMatches, // Do explicitly copy results into new allocated string instead of StringView to original string.
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SingleLine = __Regex_SingleLine, // Dot matches newline characters
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Sticky = __Regex_Sticky, // Force the pattern to only match consecutive matches from where the previous match ended.
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Multiline = __Regex_Multiline, // Handle newline characters. Match each line, one by one.
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SkipTrimEmptyMatches = __Regex_SkipTrimEmptyMatches, // Do not remove empty capture group results.
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Internal_Stateful = __Regex_Internal_Stateful, // Make global matches match one result at a time, and further match() calls on the same instance continue where the previous one left off.
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Last = Internal_Stateful,
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Global = __Regex_Global, // All matches (don't return after first match)
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Insensitive = __Regex_Insensitive, // Case insensitive match (ignores case of [a-zA-Z])
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Ungreedy = __Regex_Ungreedy, // The match becomes lazy by default. Now a ? following a quantifier makes it greedy
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Unicode = __Regex_Unicode, // Enable all unicode features and interpret all unicode escape sequences as such
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Extended = __Regex_Extended, // Ignore whitespaces. Spaces and text after a # in the pattern are ignored
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Extra = __Regex_Extra, // Disallow meaningless escapes. A \ followed by a letter with no special meaning is faulted
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MatchNotBeginOfLine = __Regex_MatchNotBeginOfLine, // Pattern is not forced to ^ -> search in whole string!
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MatchNotEndOfLine = __Regex_MatchNotEndOfLine, // Don't Force the dollar sign, $, to always match end of the string, instead of end of the line. This option is ignored if the Multiline-flag is set
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SkipSubExprResults = __Regex_SkipSubExprResults, // Do not return sub expressions in the result
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StringCopyMatches = __Regex_StringCopyMatches, // Do explicitly copy results into new allocated string instead of StringView to original string.
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SingleLine = __Regex_SingleLine, // Dot matches newline characters
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Sticky = __Regex_Sticky, // Force the pattern to only match consecutive matches from where the previous match ended.
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Multiline = __Regex_Multiline, // Handle newline characters. Match each line, one by one.
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SkipTrimEmptyMatches = __Regex_SkipTrimEmptyMatches, // Do not remove empty capture group results.
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Internal_Stateful = __Regex_Internal_Stateful, // Make global matches match one result at a time, and further match() calls on the same instance continue where the previous one left off.
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Internal_BrowserExtended = __Regex_Internal_BrowserExtended, // Only for ECMA262, Enable the behaviours defined in section B.1.4. of the ECMA262 spec.
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Last = Internal_BrowserExtended,
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};
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enum class PosixFlags : FlagsUnderlyingType {
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@ -83,6 +84,7 @@ enum class ECMAScriptFlags : FlagsUnderlyingType {
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Sticky = (FlagsUnderlyingType)AllFlags::Sticky,
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Multiline = (FlagsUnderlyingType)AllFlags::Multiline,
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StringCopyMatches = (FlagsUnderlyingType)AllFlags::StringCopyMatches,
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BrowserExtended = (FlagsUnderlyingType)AllFlags::Internal_BrowserExtended,
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};
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template<class T>
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