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295 lines
16 KiB
295 lines
16 KiB
3 years ago
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///////////////////////////////////////////////////////////////////////////////
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/// \file regex_constants.hpp
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/// Contains definitions for the syntax_option_type, match_flag_type and
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/// error_type enumerations.
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//
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// Copyright 2008 Eric Niebler. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_XPRESSIVE_REGEX_CONSTANTS_HPP_EAN_10_04_2005
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#define BOOST_XPRESSIVE_REGEX_CONSTANTS_HPP_EAN_10_04_2005
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// MS compatible compilers support #pragma once
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#if defined(_MSC_VER)
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# pragma once
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#endif
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#include <boost/mpl/identity.hpp>
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#ifndef BOOST_XPRESSIVE_DOXYGEN_INVOKED
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# define icase icase_
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#endif
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namespace boost { namespace xpressive { namespace regex_constants
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{
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/// Flags used to customize the regex syntax
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///
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enum syntax_option_type
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{
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// these flags are required:
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ECMAScript = 0, ///< Specifies that the grammar recognized by the regular expression
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///< engine uses its normal semantics: that is the same as that given
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///< in the ECMA-262, ECMAScript Language Specification, Chapter 15
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///< part 10, RegExp (Regular Expression) Objects (FWD.1).
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///<
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icase = 1 << 1, ///< Specifies that matching of regular expressions against a character
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///< container sequence shall be performed without regard to case.
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///<
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nosubs = 1 << 2, ///< Specifies that when a regular expression is matched against a
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///< character container sequence, then no sub-expression matches are to
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///< be stored in the supplied match_results structure.
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///<
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optimize = 1 << 3, ///< Specifies that the regular expression engine should pay more
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///< attention to the speed with which regular expressions are matched,
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///< and less to the speed with which regular expression objects are
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///< constructed. Otherwise it has no detectable effect on the program
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///< output.
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///<
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collate = 1 << 4, ///< Specifies that character ranges of the form "[a-b]" should be
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///< locale sensitive.
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///<
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// These flags are optional. If the functionality is supported
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// then the flags shall take these names.
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//basic = 1 << 5, ///< Specifies that the grammar recognized by the regular expression
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// ///< engine is the same as that used by POSIX basic regular expressions
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// ///< in IEEE Std 1003.1-2001, Portable Operating System Interface
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// ///< (POSIX), Base Definitions and Headers, Section 9, Regular
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// ///< Expressions (FWD.1).
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// ///<
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//extended = 1 << 6, ///< Specifies that the grammar recognized by the regular expression
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// ///< engine is the same as that used by POSIX extended regular
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// ///< expressions in IEEE Std 1003.1-2001, Portable Operating System
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// ///< Interface (POSIX), Base Definitions and Headers, Section 9,
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// ///< Regular Expressions (FWD.1).
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// ///<
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//awk = 1 << 7, ///< Specifies that the grammar recognized by the regular expression
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// ///< engine is the same as that used by POSIX utility awk in IEEE Std
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// ///< 1003.1-2001, Portable Operating System Interface (POSIX), Shells
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// ///< and Utilities, Section 4, awk (FWD.1).
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// ///<
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//grep = 1 << 8, ///< Specifies that the grammar recognized by the regular expression
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// ///< engine is the same as that used by POSIX utility grep in IEEE Std
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// ///< 1003.1-2001, Portable Operating System Interface (POSIX),
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// ///< Shells and Utilities, Section 4, Utilities, grep (FWD.1).
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// ///<
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//egrep = 1 << 9, ///< Specifies that the grammar recognized by the regular expression
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// ///< engine is the same as that used by POSIX utility grep when given
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// ///< the -E option in IEEE Std 1003.1-2001, Portable Operating System
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// ///< Interface (POSIX), Shells and Utilities, Section 4, Utilities,
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// ///< grep (FWD.1).
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// ///<
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// these flags are specific to xpressive, and they help with perl compliance.
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single_line = 1 << 10, ///< Specifies that the ^ and \$ metacharacters DO NOT match at
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///< internal line breaks. Note that this is the opposite of the
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///< perl default. It is the inverse of perl's /m (multi-line)
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///< modifier.
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///<
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not_dot_null = 1 << 11, ///< Specifies that the . metacharacter does not match the null
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///< character \\0.
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///<
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not_dot_newline = 1 << 12, ///< Specifies that the . metacharacter does not match the
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///< newline character \\n.
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///<
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ignore_white_space = 1 << 13 ///< Specifies that non-escaped white-space is not significant.
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///<
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};
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/// Flags used to customize the behavior of the regex algorithms
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///
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enum match_flag_type
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{
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match_default = 0, ///< Specifies that matching of regular expressions proceeds
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///< without any modification of the normal rules used in
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///< ECMA-262, ECMAScript Language Specification, Chapter 15
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///< part 10, RegExp (Regular Expression) Objects (FWD.1)
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///<
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match_not_bol = 1 << 1, ///< Specifies that the expression "^" should not be matched
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///< against the sub-sequence [first,first).
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///<
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match_not_eol = 1 << 2, ///< Specifies that the expression "\$" should not be
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///< matched against the sub-sequence [last,last).
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///<
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match_not_bow = 1 << 3, ///< Specifies that the expression "\\b" should not be
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///< matched against the sub-sequence [first,first).
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///<
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match_not_eow = 1 << 4, ///< Specifies that the expression "\\b" should not be
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///< matched against the sub-sequence [last,last).
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///<
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match_any = 1 << 7, ///< Specifies that if more than one match is possible then
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///< any match is an acceptable result.
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///<
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match_not_null = 1 << 8, ///< Specifies that the expression can not be matched
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///< against an empty sequence.
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///<
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match_continuous = 1 << 10, ///< Specifies that the expression must match a sub-sequence
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///< that begins at first.
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///<
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match_partial = 1 << 11, ///< Specifies that if no match can be found, then it is
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///< acceptable to return a match [from, last) where
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///< from != last, if there exists some sequence of characters
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///< [from,to) of which [from,last) is a prefix, and which
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///< would result in a full match.
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///<
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match_prev_avail = 1 << 12, ///< Specifies that --first is a valid iterator position,
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///< when this flag is set then the flags match_not_bol
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///< and match_not_bow are ignored by the regular expression
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///< algorithms (RE.7) and iterators (RE.8).
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///<
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format_default = 0, ///< Specifies that when a regular expression match is to be
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///< replaced by a new string, that the new string is
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///< constructed using the rules used by the ECMAScript
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///< replace function in ECMA-262, ECMAScript Language
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///< Specification, Chapter 15 part 5.4.11
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///< String.prototype.replace. (FWD.1). In addition during
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///< search and replace operations then all non-overlapping
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///< occurrences of the regular expression are located and
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///< replaced, and sections of the input that did not match
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///< the expression, are copied unchanged to the output
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///< string.
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///<
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format_sed = 1 << 13, ///< Specifies that when a regular expression match is to be
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///< replaced by a new string, that the new string is
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///< constructed using the rules used by the Unix sed
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///< utility in IEEE Std 1003.1-2001, Portable Operating
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///< SystemInterface (POSIX), Shells and Utilities.
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///<
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format_perl = 1 << 14, ///< Specifies that when a regular expression match is to be
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///< replaced by a new string, that the new string is
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///< constructed using an implementation defined superset
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///< of the rules used by the ECMAScript replace function in
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///< ECMA-262, ECMAScript Language Specification, Chapter 15
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///< part 5.4.11 String.prototype.replace (FWD.1).
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///<
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format_no_copy = 1 << 15, ///< When specified during a search and replace operation,
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///< then sections of the character container sequence being
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///< searched that do match the regular expression, are not
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///< copied to the output string.
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///<
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format_first_only = 1 << 16, ///< When specified during a search and replace operation,
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///< then only the first occurrence of the regular
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///< expression is replaced.
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///<
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format_literal = 1 << 17, ///< Treat the format string as a literal.
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///<
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format_all = 1 << 18 ///< Specifies that all syntax extensions are enabled,
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///< including conditional (?ddexpression1:expression2)
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///< replacements.
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///<
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};
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/// Error codes used by the regex_error type
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///
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enum error_type
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{
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error_collate, ///< The expression contained an invalid collating element name.
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///<
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error_ctype, ///< The expression contained an invalid character class name.
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///<
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error_escape, ///< The expression contained an invalid escaped character,
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///< or a trailing escape.
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///<
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error_subreg, ///< The expression contained an invalid back-reference.
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///<
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error_brack, ///< The expression contained mismatched [ and ].
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///<
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error_paren, ///< The expression contained mismatched ( and ).
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///<
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error_brace, ///< The expression contained mismatched { and }.
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///<
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error_badbrace, ///< The expression contained an invalid range in a {} expression.
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///<
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error_range, ///< The expression contained an invalid character range, for
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///< example [b-a].
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///<
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error_space, ///< There was insufficient memory to convert the expression into a
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///< finite state machine.
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///<
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error_badrepeat, ///< One of *?+{ was not preceded by a valid regular expression.
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///<
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error_complexity, ///< The complexity of an attempted match against a regular
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///< expression exceeded a pre-set level.
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///<
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error_stack, ///< There was insufficient memory to determine whether the regular
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///< expression could match the specified character sequence.
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///<
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error_badref, ///< An nested regex is uninitialized.
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///<
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error_badmark, ///< An invalid use of a named capture.
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///<
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error_badlookbehind, ///< An attempt to create a variable-width look-behind assertion
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///< was detected.
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///<
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error_badrule, ///< An invalid use of a rule was detected.
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///<
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error_badarg, ///< An argument to an action was unbound.
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///<
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error_badattr, ///< Tried to read from an uninitialized attribute.
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///<
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error_internal ///< An internal error has occurred.
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///<
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};
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/// INTERNAL ONLY
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inline syntax_option_type operator &(syntax_option_type b1, syntax_option_type b2)
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{
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return static_cast<syntax_option_type>(
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static_cast<int>(b1) & static_cast<int>(b2));
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}
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/// INTERNAL ONLY
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inline syntax_option_type operator |(syntax_option_type b1, syntax_option_type b2)
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{
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return static_cast<syntax_option_type>(static_cast<int>(b1) | static_cast<int>(b2));
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}
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/// INTERNAL ONLY
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inline syntax_option_type operator ^(syntax_option_type b1, syntax_option_type b2)
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{
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return static_cast<syntax_option_type>(static_cast<int>(b1) ^ static_cast<int>(b2));
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}
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/// INTERNAL ONLY
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inline syntax_option_type operator ~(syntax_option_type b)
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{
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return static_cast<syntax_option_type>(~static_cast<int>(b));
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}
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/// INTERNAL ONLY
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inline match_flag_type operator &(match_flag_type b1, match_flag_type b2)
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{
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return static_cast<match_flag_type>(static_cast<int>(b1) & static_cast<int>(b2));
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}
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/// INTERNAL ONLY
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inline match_flag_type operator |(match_flag_type b1, match_flag_type b2)
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{
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return static_cast<match_flag_type>(static_cast<int>(b1) | static_cast<int>(b2));
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}
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/// INTERNAL ONLY
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inline match_flag_type operator ^(match_flag_type b1, match_flag_type b2)
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{
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return static_cast<match_flag_type>(static_cast<int>(b1) ^ static_cast<int>(b2));
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}
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/// INTERNAL ONLY
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inline match_flag_type operator ~(match_flag_type b)
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{
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return static_cast<match_flag_type>(~static_cast<int>(b));
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}
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}}} // namespace boost::xpressive::regex_constants
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#ifndef BOOST_XPRESSIVE_DOXYGEN_INVOKED
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# undef icase
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#endif
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#endif
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