1566 lines
54 KiB
C++
1566 lines
54 KiB
C++
#include "regex_impl.hh"
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#include "exception.hh"
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#include "string.hh"
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#include "unicode.hh"
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#include "unit_tests.hh"
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#include "utf8.hh"
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#include "utf8_iterator.hh"
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#include "string_utils.hh"
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#include "vector.hh"
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#include "utils.hh"
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#include <cstring>
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namespace Kakoune
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{
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constexpr Codepoint CompiledRegex::StartDesc::other;
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constexpr Codepoint CompiledRegex::StartDesc::count;
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struct ParsedRegex
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{
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enum Op : char
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{
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Literal,
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AnyChar,
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AnyCharExceptNewLine,
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Class,
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CharacterType,
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Sequence,
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Alternation,
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LineStart,
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LineEnd,
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WordBoundary,
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NotWordBoundary,
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SubjectBegin,
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SubjectEnd,
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ResetStart,
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LookAhead,
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NegativeLookAhead,
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LookBehind,
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NegativeLookBehind,
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};
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struct Quantifier
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{
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enum Type : char
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{
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One,
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Optional,
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RepeatZeroOrMore,
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RepeatOneOrMore,
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RepeatMinMax,
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};
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Type type = One;
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bool greedy = true;
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int16_t min = -1, max = -1;
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bool allows_none() const
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{
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return type == Quantifier::Optional or
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type == Quantifier::RepeatZeroOrMore or
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(type == Quantifier::RepeatMinMax and min <= 0);
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}
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bool allows_infinite_repeat() const
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{
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return type == Quantifier::RepeatZeroOrMore or
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type == Quantifier::RepeatOneOrMore or
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(type == Quantifier::RepeatMinMax and max < 0);
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};
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};
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using NodeIndex = uint16_t;
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struct Node
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{
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Op op;
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bool ignore_case;
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NodeIndex children_end;
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Codepoint value;
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Quantifier quantifier;
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};
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static_assert(sizeof(Node) == 16, "");
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Vector<Node, MemoryDomain::Regex> nodes;
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Vector<CharacterClass, MemoryDomain::Regex> character_classes;
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Vector<CompiledRegex::NamedCapture, MemoryDomain::Regex> named_captures;
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uint32_t capture_count;
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};
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namespace
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{
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template<RegexMode mode = RegexMode::Forward>
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struct Children
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{
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static_assert(has_direction(mode));
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using Index = ParsedRegex::NodeIndex;
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struct Sentinel {};
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struct Iterator
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{
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static constexpr bool forward = mode & RegexMode::Forward;
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Iterator(ArrayView<const ParsedRegex::Node> nodes, Index index)
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: m_nodes{nodes},
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m_pos(forward ? index+1 : find_prev(index, nodes[index].children_end)),
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m_end(forward ? nodes[index].children_end : index)
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{}
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Iterator& operator++()
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{
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m_pos = forward ? m_nodes[m_pos].children_end : find_prev(m_end, m_pos);
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return *this;
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}
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Index operator*() const { return m_pos; }
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bool operator!=(Sentinel) const { return m_pos != m_end; }
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Index find_prev(Index parent, Index pos) const
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{
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Index child = parent+1;
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if (child == pos)
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return parent;
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while (m_nodes[child].children_end != pos)
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child = m_nodes[child].children_end;
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return child;
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}
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ArrayView<const ParsedRegex::Node> m_nodes;
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Index m_pos;
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Index m_end;
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};
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Iterator begin() const { return {m_parsed_regex.nodes, m_index}; }
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Sentinel end() const { return {}; }
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const ParsedRegex& m_parsed_regex;
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const Index m_index;
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};
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}
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// Recursive descent parser based on naming used in the ECMAScript
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// standard, although the syntax is not fully compatible.
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struct RegexParser
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{
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RegexParser(StringView re)
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: m_regex{re}, m_pos{re.begin(), re}
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{
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m_parsed_regex.capture_count = 1;
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m_parsed_regex.nodes.reserve((size_t)re.length());
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NodeIndex root = disjunction(0);
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kak_assert(root == 0);
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}
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ParsedRegex get_parsed_regex() { return std::move(m_parsed_regex); }
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static ParsedRegex parse(StringView re) { return RegexParser{re}.get_parsed_regex(); }
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private:
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struct InvalidPolicy
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{
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Codepoint operator()(Codepoint cp) { throw regex_error{"Invalid utf8 in regex"}; }
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};
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enum class Flags
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{
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None = 0,
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IgnoreCase = 1 << 0,
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DotMatchesNewLine = 1 << 1,
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};
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friend constexpr bool with_bit_ops(Meta::Type<Flags>) { return true; }
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using Iterator = utf8::iterator<const char*, const char*, Codepoint, int, InvalidPolicy>;
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using NodeIndex = ParsedRegex::NodeIndex;
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NodeIndex disjunction(uint32_t capture = -1)
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{
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NodeIndex index = new_node(ParsedRegex::Alternation);
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get_node(index).value = capture;
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while (true)
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{
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alternative();
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if (at_end() or *m_pos != '|')
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break;
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++m_pos;
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}
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get_node(index).children_end = m_parsed_regex.nodes.size();
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return index;
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}
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NodeIndex alternative(ParsedRegex::Op op = ParsedRegex::Sequence)
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{
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NodeIndex index = new_node(op);
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while (auto t = term())
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{}
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get_node(index).children_end = m_parsed_regex.nodes.size();
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return index;
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}
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Optional<NodeIndex> term()
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{
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while (modifiers()) // read all modifiers
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{}
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if (auto node = assertion())
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return node;
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if (auto node = atom())
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{
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get_node(*node).quantifier = quantifier();
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return node;
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}
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return {};
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}
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bool modifiers()
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{
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auto it = m_pos.base();
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if (m_regex.end() - it >= 4 and *it++ == '(' and *it++ == '?')
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{
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while (true)
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{
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auto m = *it++;
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switch (m)
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{
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case 'i': m_flags |= Flags::IgnoreCase; break;
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case 'I': m_flags &= ~Flags::IgnoreCase; break;
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case 's': m_flags |= Flags::DotMatchesNewLine; break;
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case 'S': m_flags &= ~Flags::DotMatchesNewLine; break;
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case ')':
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m_pos = Iterator{it, m_regex};
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return true;
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default: return false;
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}
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}
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}
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return false;
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}
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Optional<NodeIndex> assertion()
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{
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if (at_end())
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return {};
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switch (*m_pos)
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{
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case '^': ++m_pos; return new_node(ParsedRegex::LineStart);
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case '$': ++m_pos; return new_node(ParsedRegex::LineEnd);
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case '\\':
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if (m_pos+1 == m_regex.end())
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return {};
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switch (*(m_pos+1))
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{
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case 'b': m_pos += 2; return new_node(ParsedRegex::WordBoundary);
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case 'B': m_pos += 2; return new_node(ParsedRegex::NotWordBoundary);
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case 'A': m_pos += 2; return new_node(ParsedRegex::SubjectBegin);
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case 'z': m_pos += 2; return new_node(ParsedRegex::SubjectEnd);
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case 'K': m_pos += 2; return new_node(ParsedRegex::ResetStart);
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}
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break;
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case '(':
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{
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auto it = m_pos.base()+1;
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if (m_regex.end() - it <= 2 or *it++ != '?')
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return {};
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ParsedRegex::Op op;
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switch (*it++)
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{
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case '=': op = ParsedRegex::LookAhead; break;
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case '!': op = ParsedRegex::NegativeLookAhead; break;
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case '<':
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{
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switch (*it++)
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{
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case '=': op = ParsedRegex::LookBehind; break;
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case '!': op = ParsedRegex::NegativeLookBehind; break;
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default: return {};
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}
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break;
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}
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default: return {};
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}
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m_pos = Iterator{it, m_regex};
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NodeIndex lookaround = alternative(op);
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if (at_end() or *m_pos++ != ')')
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parse_error("unclosed parenthesis");
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validate_lookaround(lookaround);
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return lookaround;
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}
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}
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return {};
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}
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Optional<NodeIndex> atom()
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{
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if (at_end())
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return {};
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switch (const Codepoint cp = *m_pos)
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{
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case '.':
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++m_pos;
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if (m_flags & Flags::DotMatchesNewLine)
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return new_node(ParsedRegex::AnyChar);
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else
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return new_node(ParsedRegex::AnyCharExceptNewLine);
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case '(':
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{
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uint32_t capture_group = -1;
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const char* it = (++m_pos).base();
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if (m_regex.end() - it < 2 or *it++ != '?')
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capture_group = m_parsed_regex.capture_count++;
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else if (*it == ':')
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m_pos = Iterator{++it, m_regex};
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else if (*it == '<')
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{
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const auto name_start = ++it;
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while (it != m_regex.end() and is_word(*it))
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++it;
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if (it == m_regex.end() or *it != '>')
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parse_error("named captures should be only ascii word characters");
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capture_group = m_parsed_regex.capture_count++;
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m_parsed_regex.named_captures.push_back({{name_start, it}, capture_group});
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m_pos = Iterator{++it, m_regex};
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}
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NodeIndex content = disjunction(capture_group);
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if (at_end() or *m_pos++ != ')')
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parse_error("unclosed parenthesis");
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return content;
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}
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case '\\':
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++m_pos;
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return atom_escape();
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case '[':
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++m_pos;
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return character_class();
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case '|': case ')':
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return {};
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default:
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if (contains("^$.*+?[]{}", cp) or (cp >= 0xF0000 and cp <= 0xFFFFF))
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parse_error(format("unexpected '{}'", cp));
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++m_pos;
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return new_node(ParsedRegex::Literal, cp);
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}
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}
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NodeIndex atom_escape()
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{
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const Codepoint cp = *m_pos++;
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if (cp == 'Q')
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{
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auto escaped_sequence = new_node(ParsedRegex::Sequence);
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constexpr StringView end_mark{"\\E"};
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auto quote_end = std::search(m_pos.base(), m_regex.end(), end_mark.begin(), end_mark.end());
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while (m_pos != quote_end)
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new_node(ParsedRegex::Literal, *m_pos++);
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get_node(escaped_sequence).children_end = m_parsed_regex.nodes.size();
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if (quote_end != m_regex.end())
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m_pos += 2;
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return escaped_sequence;
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}
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// CharacterClassEscape
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auto class_it = find_if(character_class_escapes, [cp](auto& c) { return c.cp == cp; });
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if (class_it != std::end(character_class_escapes))
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return new_node(ParsedRegex::CharacterType, (Codepoint)class_it->ctype);
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// CharacterEscape
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for (auto& control : control_escapes)
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{
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if (control.name == cp)
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return new_node(ParsedRegex::Literal, control.value);
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}
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auto read_hex = [this](size_t count)
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{
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Codepoint res = 0;
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for (int i = 0; i < count; ++i)
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{
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if (at_end())
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parse_error("unterminated hex sequence");
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Codepoint digit = *m_pos++;
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Codepoint digit_value;
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if ('0' <= digit and digit <= '9')
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digit_value = digit - '0';
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else if ('a' <= digit and digit <= 'f')
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digit_value = 0xa + digit - 'a';
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else if ('A' <= digit and digit <= 'F')
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digit_value = 0xa + digit - 'A';
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else
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parse_error(format("invalid hex digit '{}'", digit));
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res = res * 16 + digit_value;
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}
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return res;
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};
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if (cp == '0')
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return new_node(ParsedRegex::Literal, '\0');
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else if (cp == 'c')
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{
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if (at_end())
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parse_error("unterminated control escape");
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Codepoint ctrl = *m_pos++;
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if (('a' <= ctrl and ctrl <= 'z') or ('A' <= ctrl and ctrl <= 'Z'))
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return new_node(ParsedRegex::Literal, ctrl % 32);
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parse_error(format("Invalid control escape character '{}'", ctrl));
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}
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else if (cp == 'x')
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return new_node(ParsedRegex::Literal, read_hex(2));
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else if (cp == 'u')
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return new_node(ParsedRegex::Literal, read_hex(4));
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if (contains("^$\\.*+?()[]{}|", cp)) // SyntaxCharacter
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return new_node(ParsedRegex::Literal, cp);
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parse_error(format("unknown atom escape '{}'", cp));
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}
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void normalize_ranges(Vector<CharacterClass::Range, MemoryDomain::Regex>& ranges)
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{
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if (ranges.empty())
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return;
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// Sort ranges so that we can use binary search
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std::sort(ranges.begin(), ranges.end(),
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[](auto& lhs, auto& rhs) { return lhs.min < rhs.min; });
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// merge overlapping ranges
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auto pos = ranges.begin();
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for (auto next = pos+1; next != ranges.end(); ++next)
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{
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if (pos->max + 1 >= next->min)
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{
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if (next->max > pos->max)
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pos->max = next->max;
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}
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else
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*++pos = *next;
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}
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ranges.erase(pos+1, ranges.end());
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}
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NodeIndex character_class()
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{
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CharacterClass character_class;
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character_class.ignore_case = (m_flags & Flags::IgnoreCase);
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character_class.negative = m_pos != m_regex.end() and *m_pos == '^';
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if (character_class.negative)
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++m_pos;
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while (m_pos != m_regex.end() and *m_pos != ']')
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{
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auto cp = *m_pos++;
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if (cp == '-')
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{
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character_class.ranges.push_back({ '-', '-' });
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continue;
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}
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if (at_end())
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break;
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if (cp == '\\')
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{
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auto it = find_if(character_class_escapes,
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[cp = *m_pos](auto&& t) { return t.cp == cp; });
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if (it != std::end(character_class_escapes))
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{
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character_class.ctypes |= it->ctype;
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++m_pos;
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continue;
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}
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else // its an escaped character
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{
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cp = *m_pos++;
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auto it = find_if(control_escapes, [cp](auto&& t) { return t.name == cp; });
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if (it != std::end(control_escapes))
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cp = it->value;
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else if (not contains("^$\\.*+?()[]{}|-", cp)) // SyntaxCharacter and -
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parse_error(format("unknown character class escape '{}'", cp));
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}
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}
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CharacterClass::Range range = { cp, cp };
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if (*m_pos == '-')
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{
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if (++m_pos == m_regex.end())
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break;
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if (*m_pos != ']')
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{
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range.max = *m_pos++;
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if (range.min > range.max)
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parse_error("invalid range specified");
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}
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else
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{
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character_class.ranges.push_back(range);
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range = { '-', '-' };
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}
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}
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character_class.ranges.push_back(range);
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}
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if (at_end())
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parse_error("unclosed character class");
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++m_pos;
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if (character_class.ignore_case)
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{
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for (auto& range : character_class.ranges)
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{
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range.min = to_lower(range.min);
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range.max = to_lower(range.max);
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}
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}
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normalize_ranges(character_class.ranges);
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// Optimize the relatively common case of using a character class to
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// escape a character, such as [*]
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if (character_class.ctypes == CharacterType::None and not character_class.negative and
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character_class.ranges.size() == 1 and
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character_class.ranges.front().min == character_class.ranges.front().max)
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return new_node(ParsedRegex::Literal, character_class.ranges.front().min);
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if (character_class.ctypes != CharacterType::None and not character_class.negative and
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character_class.ranges.empty())
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return new_node(ParsedRegex::CharacterType, (Codepoint)character_class.ctypes);
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auto class_id = m_parsed_regex.character_classes.size();
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m_parsed_regex.character_classes.push_back(std::move(character_class));
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return new_node(ParsedRegex::Class, class_id);
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}
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ParsedRegex::Quantifier quantifier()
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{
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if (at_end())
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return {ParsedRegex::Quantifier::One};
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|
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constexpr int max_repeat = 1000;
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auto read_bound = [&]() {
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int16_t res = 0;
|
|
for (auto begin = m_pos; m_pos != m_regex.end(); ++m_pos)
|
|
{
|
|
const auto cp = *m_pos;
|
|
if (cp < '0' or cp > '9')
|
|
return m_pos == begin ? (int16_t)-1 : res;
|
|
res = res * 10 + cp - '0';
|
|
if (res > max_repeat)
|
|
parse_error(format("Explicit quantifier is too big, maximum is {}", max_repeat));
|
|
}
|
|
return res;
|
|
};
|
|
|
|
auto check_greedy = [&]() {
|
|
if (at_end() or *m_pos != '?')
|
|
return true;
|
|
++m_pos;
|
|
return false;
|
|
};
|
|
|
|
switch (*m_pos)
|
|
{
|
|
case '*': ++m_pos; return {ParsedRegex::Quantifier::RepeatZeroOrMore, check_greedy()};
|
|
case '+': ++m_pos; return {ParsedRegex::Quantifier::RepeatOneOrMore, check_greedy()};
|
|
case '?': ++m_pos; return {ParsedRegex::Quantifier::Optional, check_greedy()};
|
|
case '{':
|
|
{
|
|
++m_pos;
|
|
const int16_t min = read_bound();
|
|
int16_t max = min;
|
|
if (*m_pos == ',')
|
|
{
|
|
++m_pos;
|
|
max = read_bound();
|
|
}
|
|
if (*m_pos++ != '}')
|
|
parse_error("expected closing bracket");
|
|
return {ParsedRegex::Quantifier::RepeatMinMax, check_greedy(), min, max};
|
|
}
|
|
default: return {ParsedRegex::Quantifier::One};
|
|
}
|
|
}
|
|
|
|
NodeIndex new_node(ParsedRegex::Op op, Codepoint value = -1,
|
|
ParsedRegex::Quantifier quantifier = {ParsedRegex::Quantifier::One})
|
|
{
|
|
constexpr auto max_nodes = std::numeric_limits<int16_t>::max();
|
|
const NodeIndex res = m_parsed_regex.nodes.size();
|
|
if (res == max_nodes)
|
|
parse_error(format("regex parsed to more than {} ast nodes", max_nodes));
|
|
const NodeIndex next = res+1;
|
|
m_parsed_regex.nodes.push_back({op, m_flags & Flags::IgnoreCase, next, value, quantifier});
|
|
return res;
|
|
}
|
|
|
|
bool at_end() const { return m_pos == m_regex.end(); }
|
|
|
|
ParsedRegex::Node& get_node(NodeIndex index)
|
|
{
|
|
return m_parsed_regex.nodes[index];
|
|
}
|
|
|
|
|
|
[[gnu::noreturn]]
|
|
void parse_error(StringView error) const
|
|
{
|
|
throw regex_error(format("regex parse error: {} at '{}<<<HERE>>>{}'", error,
|
|
StringView{m_regex.begin(), m_pos.base()},
|
|
StringView{m_pos.base(), m_regex.end()}));
|
|
}
|
|
|
|
void validate_lookaround(NodeIndex index)
|
|
{
|
|
using Lookaround = CompiledRegex::Lookaround;
|
|
for (auto child_index : Children<>{m_parsed_regex, index})
|
|
{
|
|
auto& child = get_node(child_index);
|
|
if (child.op != ParsedRegex::Literal and child.op != ParsedRegex::Class and
|
|
child.op != ParsedRegex::CharacterType and child.op != ParsedRegex::AnyChar and
|
|
child.op != ParsedRegex::AnyCharExceptNewLine)
|
|
parse_error("Lookaround can only contain literals, any chars or character classes");
|
|
if (child.op == ParsedRegex::Literal and
|
|
to_underlying(Lookaround::OpBegin) <= child.value and
|
|
child.value < to_underlying(Lookaround::OpEnd))
|
|
parse_error("Lookaround does not support literals codepoint between 0xF0000 and 0xFFFFD");
|
|
if (child.quantifier.type != ParsedRegex::Quantifier::One)
|
|
parse_error("Quantifiers cannot be used in lookarounds");
|
|
}
|
|
}
|
|
|
|
ParsedRegex m_parsed_regex;
|
|
StringView m_regex;
|
|
Iterator m_pos;
|
|
|
|
Flags m_flags = Flags::DotMatchesNewLine;
|
|
|
|
static constexpr struct CharacterClassEscape {
|
|
Codepoint cp;
|
|
CharacterType ctype;
|
|
} character_class_escapes[] = {
|
|
{ 'd', CharacterType::Digit }, { 'D', CharacterType::NotDigit },
|
|
{ 'w', CharacterType::Word }, { 'W', CharacterType::NotWord },
|
|
{ 's', CharacterType::Whitespace }, { 'S', CharacterType::NotWhitespace },
|
|
{ 'h', CharacterType::HorizontalWhitespace }, { 'H', CharacterType::NotHorizontalWhitespace },
|
|
};
|
|
|
|
static constexpr struct ControlEscape {
|
|
Codepoint name;
|
|
Codepoint value;
|
|
} control_escapes[] = {
|
|
{ 'f', '\f' },
|
|
{ 'n', '\n' },
|
|
{ 'r', '\r' },
|
|
{ 't', '\t' },
|
|
{ 'v', '\v' }
|
|
};
|
|
};
|
|
|
|
constexpr RegexParser::CharacterClassEscape RegexParser::character_class_escapes[];
|
|
constexpr RegexParser::ControlEscape RegexParser::control_escapes[];
|
|
|
|
struct RegexCompiler
|
|
{
|
|
RegexCompiler(ParsedRegex&& parsed_regex, RegexCompileFlags flags)
|
|
: m_parsed_regex{parsed_regex}, m_flags(flags)
|
|
{
|
|
kak_assert(not (flags & RegexCompileFlags::NoForward) or flags & RegexCompileFlags::Backward);
|
|
// Approximation of the number of instructions generated
|
|
m_program.instructions.reserve((parsed_regex.nodes.size() + 1)
|
|
* (((flags & RegexCompileFlags::Backward) and
|
|
not (flags & RegexCompileFlags::NoForward)) ? 2 : 1));
|
|
|
|
if (not (flags & RegexCompileFlags::NoForward))
|
|
{
|
|
m_program.forward_start_desc = compute_start_desc<RegexMode::Forward>();
|
|
compile_node<RegexMode::Forward>(0);
|
|
peephole_optimize(0, m_program.instructions.size());
|
|
push_inst(CompiledRegex::Match);
|
|
}
|
|
|
|
if (flags & RegexCompileFlags::Backward)
|
|
{
|
|
m_program.first_backward_inst = m_program.instructions.size();
|
|
m_program.backward_start_desc = compute_start_desc<RegexMode::Backward>();
|
|
compile_node<RegexMode::Backward>(0);
|
|
peephole_optimize(m_program.first_backward_inst, m_program.instructions.size());
|
|
push_inst(CompiledRegex::Match);
|
|
}
|
|
else
|
|
m_program.first_backward_inst = -1;
|
|
|
|
m_program.character_classes = std::move(m_parsed_regex.character_classes);
|
|
m_program.named_captures = std::move(m_parsed_regex.named_captures);
|
|
m_program.save_count = m_parsed_regex.capture_count * 2;
|
|
}
|
|
|
|
CompiledRegex get_compiled_regex() { return std::move(m_program); }
|
|
|
|
private:
|
|
|
|
template<RegexMode direction>
|
|
uint32_t compile_node_inner(ParsedRegex::NodeIndex index)
|
|
{
|
|
auto& node = get_node(index);
|
|
|
|
const uint32_t start_pos = (uint32_t)m_program.instructions.size();
|
|
const bool ignore_case = node.ignore_case;
|
|
|
|
const bool save = (node.op == ParsedRegex::Alternation or node.op == ParsedRegex::Sequence) and
|
|
(node.value == 0 or (node.value != -1 and not (m_flags & RegexCompileFlags::NoSubs)));
|
|
constexpr bool forward = direction == RegexMode::Forward;
|
|
if (save)
|
|
push_inst(CompiledRegex::Save, node.value * 2 + (forward ? 0 : 1));
|
|
|
|
Vector<uint32_t> goto_inner_end_offsets;
|
|
switch (node.op)
|
|
{
|
|
case ParsedRegex::Literal:
|
|
if (ignore_case)
|
|
push_inst(CompiledRegex::Literal_IgnoreCase, to_lower(node.value));
|
|
else
|
|
push_inst(CompiledRegex::Literal, node.value);
|
|
break;
|
|
case ParsedRegex::AnyChar:
|
|
push_inst(CompiledRegex::AnyChar);
|
|
break;
|
|
case ParsedRegex::AnyCharExceptNewLine:
|
|
push_inst(CompiledRegex::AnyCharExceptNewLine);
|
|
break;
|
|
case ParsedRegex::Class:
|
|
push_inst(CompiledRegex::Class, node.value);
|
|
break;
|
|
case ParsedRegex::CharacterType:
|
|
push_inst(CompiledRegex::CharacterType, node.value);
|
|
break;
|
|
case ParsedRegex::Sequence:
|
|
{
|
|
for (auto child : Children<direction>{m_parsed_regex, index})
|
|
compile_node<direction>(child);
|
|
break;
|
|
}
|
|
case ParsedRegex::Alternation:
|
|
{
|
|
auto split_pos = m_program.instructions.size();
|
|
for (auto child : Children<>{m_parsed_regex, index})
|
|
{
|
|
if (child != index+1)
|
|
push_inst(CompiledRegex::Split_PrioritizeParent);
|
|
}
|
|
|
|
const auto end = node.children_end;
|
|
for (auto child : Children<>{m_parsed_regex, index})
|
|
{
|
|
auto node = compile_node<direction>(child);
|
|
if (child != index+1)
|
|
m_program.instructions[split_pos++].param = node;
|
|
if (get_node(child).children_end != end)
|
|
{
|
|
auto jump = push_inst(CompiledRegex::Jump);
|
|
goto_inner_end_offsets.push_back(jump);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case ParsedRegex::LookAhead:
|
|
push_inst(ignore_case ? CompiledRegex::LookAhead_IgnoreCase
|
|
: CompiledRegex::LookAhead,
|
|
push_lookaround<RegexMode::Forward>(index, ignore_case));
|
|
break;
|
|
case ParsedRegex::NegativeLookAhead:
|
|
push_inst(ignore_case ? CompiledRegex::NegativeLookAhead_IgnoreCase
|
|
: CompiledRegex::NegativeLookAhead,
|
|
push_lookaround<RegexMode::Forward>(index, ignore_case));
|
|
break;
|
|
case ParsedRegex::LookBehind:
|
|
push_inst(ignore_case ? CompiledRegex::LookBehind_IgnoreCase
|
|
: CompiledRegex::LookBehind,
|
|
push_lookaround<RegexMode::Backward>(index, ignore_case));
|
|
break;
|
|
case ParsedRegex::NegativeLookBehind:
|
|
push_inst(ignore_case ? CompiledRegex::NegativeLookBehind_IgnoreCase
|
|
: CompiledRegex::NegativeLookBehind,
|
|
push_lookaround<RegexMode::Backward>(index, ignore_case));
|
|
break;
|
|
case ParsedRegex::LineStart:
|
|
push_inst(CompiledRegex::LineStart);
|
|
break;
|
|
case ParsedRegex::LineEnd:
|
|
push_inst(CompiledRegex::LineEnd);
|
|
break;
|
|
case ParsedRegex::WordBoundary:
|
|
push_inst(CompiledRegex::WordBoundary);
|
|
break;
|
|
case ParsedRegex::NotWordBoundary:
|
|
push_inst(CompiledRegex::NotWordBoundary);
|
|
break;
|
|
case ParsedRegex::SubjectBegin:
|
|
push_inst(CompiledRegex::SubjectBegin);
|
|
break;
|
|
case ParsedRegex::SubjectEnd:
|
|
push_inst(CompiledRegex::SubjectEnd);
|
|
break;
|
|
case ParsedRegex::ResetStart:
|
|
push_inst(CompiledRegex::Save, 0);
|
|
break;
|
|
}
|
|
|
|
for (auto& offset : goto_inner_end_offsets)
|
|
m_program.instructions[offset].param = m_program.instructions.size();
|
|
|
|
if (save)
|
|
push_inst(CompiledRegex::Save, node.value * 2 + (forward ? 1 : 0));
|
|
|
|
return start_pos;
|
|
}
|
|
|
|
template<RegexMode direction>
|
|
uint32_t compile_node(ParsedRegex::NodeIndex index)
|
|
{
|
|
auto& node = get_node(index);
|
|
|
|
const uint32_t start_pos = (uint32_t)m_program.instructions.size();
|
|
Vector<uint32_t> goto_ends;
|
|
|
|
auto& quantifier = node.quantifier;
|
|
|
|
if (quantifier.allows_none())
|
|
{
|
|
auto split_pos = push_inst(quantifier.greedy ? CompiledRegex::Split_PrioritizeParent
|
|
: CompiledRegex::Split_PrioritizeChild);
|
|
goto_ends.push_back(split_pos);
|
|
}
|
|
|
|
auto inner_pos = compile_node_inner<direction>(index);
|
|
// Write the node multiple times when we have a min count quantifier
|
|
for (int i = 1; i < quantifier.min; ++i)
|
|
inner_pos = compile_node_inner<direction>(index);
|
|
|
|
if (quantifier.allows_infinite_repeat())
|
|
push_inst(quantifier.greedy ? CompiledRegex::Split_PrioritizeChild
|
|
: CompiledRegex::Split_PrioritizeParent,
|
|
inner_pos);
|
|
// Write the node as an optional match for the min -> max counts
|
|
else for (int i = std::max((int16_t)1, quantifier.min); // STILL UGLY !
|
|
i < quantifier.max; ++i)
|
|
{
|
|
auto split_pos = push_inst(quantifier.greedy ? CompiledRegex::Split_PrioritizeParent
|
|
: CompiledRegex::Split_PrioritizeChild);
|
|
goto_ends.push_back(split_pos);
|
|
compile_node_inner<direction>(index);
|
|
}
|
|
|
|
for (auto offset : goto_ends)
|
|
m_program.instructions[offset].param = m_program.instructions.size();
|
|
|
|
return start_pos;
|
|
}
|
|
|
|
uint32_t push_inst(CompiledRegex::Op op, uint32_t param = 0)
|
|
{
|
|
constexpr auto max_instructions = std::numeric_limits<int16_t>::max();
|
|
const uint32_t res = m_program.instructions.size();
|
|
if (res > max_instructions)
|
|
throw regex_error(format("regex compiled to more than {} instructions", max_instructions));
|
|
m_program.instructions.push_back({ op, false, 0, param });
|
|
return res;
|
|
}
|
|
|
|
template<RegexMode direction>
|
|
uint32_t push_lookaround(ParsedRegex::NodeIndex index, bool ignore_case)
|
|
{
|
|
using Lookaround = CompiledRegex::Lookaround;
|
|
|
|
const uint32_t res = m_program.lookarounds.size();
|
|
for (auto child : Children<direction>{m_parsed_regex, index})
|
|
{
|
|
auto& character = get_node(child);
|
|
if (character.op == ParsedRegex::Literal)
|
|
m_program.lookarounds.push_back(
|
|
static_cast<Lookaround>(ignore_case ? to_lower(character.value) : character.value));
|
|
else if (character.op == ParsedRegex::AnyChar)
|
|
m_program.lookarounds.push_back(Lookaround::AnyChar);
|
|
else if (character.op == ParsedRegex::AnyCharExceptNewLine)
|
|
m_program.lookarounds.push_back(Lookaround::AnyCharExceptNewLine);
|
|
else if (character.op == ParsedRegex::Class)
|
|
m_program.lookarounds.push_back(static_cast<Lookaround>(to_underlying(Lookaround::CharacterClass) + character.value));
|
|
else if (character.op == ParsedRegex::CharacterType)
|
|
m_program.lookarounds.push_back(static_cast<Lookaround>(to_underlying(Lookaround::CharacterType) | character.value));
|
|
else
|
|
kak_assert(false);
|
|
}
|
|
m_program.lookarounds.push_back(Lookaround::EndOfLookaround);
|
|
return res;
|
|
}
|
|
|
|
// Mutate start_desc with informations on which Codepoint could start a match.
|
|
// Returns true if the node possibly does not consume the char, in which case
|
|
// the next node would still be relevant for the parent node start chars computation.
|
|
template<RegexMode direction>
|
|
bool compute_start_desc(ParsedRegex::NodeIndex index,
|
|
CompiledRegex::StartDesc& start_desc) const
|
|
{
|
|
auto& node = get_node(index);
|
|
switch (node.op)
|
|
{
|
|
case ParsedRegex::Literal:
|
|
if (node.value < CompiledRegex::StartDesc::count)
|
|
{
|
|
if (node.ignore_case)
|
|
{
|
|
start_desc.map[to_lower(node.value)] = true;
|
|
start_desc.map[to_upper(node.value)] = true;
|
|
}
|
|
else
|
|
start_desc.map[node.value] = true;
|
|
}
|
|
else
|
|
start_desc.map[CompiledRegex::StartDesc::other] = true;
|
|
return node.quantifier.allows_none();
|
|
case ParsedRegex::AnyChar:
|
|
for (auto& b : start_desc.map)
|
|
b = true;
|
|
return node.quantifier.allows_none();
|
|
case ParsedRegex::AnyCharExceptNewLine:
|
|
for (Codepoint cp = 0; cp < CompiledRegex::StartDesc::count; ++cp)
|
|
{
|
|
if (cp != '\n')
|
|
start_desc.map[cp] = true;
|
|
}
|
|
return node.quantifier.allows_none();
|
|
case ParsedRegex::Class:
|
|
{
|
|
auto& character_class = m_parsed_regex.character_classes[node.value];
|
|
if (character_class.ctypes == CharacterType::None and not character_class.negative)
|
|
{
|
|
for (auto& range : character_class.ranges)
|
|
{
|
|
const auto clamp = [](Codepoint cp) { return std::min(CompiledRegex::StartDesc::count, cp); };
|
|
for (auto cp = clamp(range.min), end = clamp(range.max + 1); cp < end; ++cp)
|
|
start_desc.map[cp] = true;
|
|
if (range.max >= CompiledRegex::StartDesc::count)
|
|
start_desc.map[CompiledRegex::StartDesc::other] = true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (Codepoint cp = 0; cp < CompiledRegex::StartDesc::count; ++cp)
|
|
{
|
|
if (start_desc.map[cp] or is_character_class(character_class, cp))
|
|
start_desc.map[cp] = true;
|
|
}
|
|
}
|
|
start_desc.map[CompiledRegex::StartDesc::other] = true;
|
|
return node.quantifier.allows_none();
|
|
}
|
|
case ParsedRegex::CharacterType:
|
|
{
|
|
const CharacterType ctype = (CharacterType)node.value;
|
|
for (Codepoint cp = 0; cp < CompiledRegex::StartDesc::count; ++cp)
|
|
{
|
|
if (is_ctype(ctype, cp))
|
|
start_desc.map[cp] = true;
|
|
}
|
|
start_desc.map[CompiledRegex::StartDesc::other] = true;
|
|
return node.quantifier.allows_none();
|
|
}
|
|
case ParsedRegex::Sequence:
|
|
{
|
|
for (auto child : Children<direction>{m_parsed_regex, index})
|
|
{
|
|
if (not compute_start_desc<direction>(child, start_desc))
|
|
return node.quantifier.allows_none();
|
|
}
|
|
return true;
|
|
}
|
|
case ParsedRegex::Alternation:
|
|
{
|
|
bool all_consumed = not node.quantifier.allows_none();
|
|
for (auto child : Children<>{m_parsed_regex, index})
|
|
{
|
|
if (compute_start_desc<direction>(child, start_desc))
|
|
all_consumed = false;
|
|
}
|
|
return not all_consumed;
|
|
}
|
|
case ParsedRegex::LineStart:
|
|
case ParsedRegex::LineEnd:
|
|
case ParsedRegex::WordBoundary:
|
|
case ParsedRegex::NotWordBoundary:
|
|
case ParsedRegex::SubjectBegin:
|
|
case ParsedRegex::SubjectEnd:
|
|
case ParsedRegex::ResetStart:
|
|
case ParsedRegex::LookAhead:
|
|
case ParsedRegex::LookBehind:
|
|
case ParsedRegex::NegativeLookAhead:
|
|
case ParsedRegex::NegativeLookBehind:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
template<RegexMode direction>
|
|
[[gnu::noinline]]
|
|
std::unique_ptr<CompiledRegex::StartDesc> compute_start_desc() const
|
|
{
|
|
CompiledRegex::StartDesc start_desc{};
|
|
if (compute_start_desc<direction>(0, start_desc) or
|
|
not contains(start_desc.map, false))
|
|
return nullptr;
|
|
|
|
return std::make_unique<CompiledRegex::StartDesc>(start_desc);
|
|
}
|
|
|
|
void peephole_optimize(size_t begin, size_t end)
|
|
{
|
|
if (not (m_flags & RegexCompileFlags::Optimize))
|
|
return;
|
|
|
|
// Move saves after all assertions on the same character
|
|
auto is_assertion = [](CompiledRegex::Op op) { return op >= CompiledRegex::LineStart; };
|
|
for (auto i = begin, j = begin + 1; j < end; ++i, ++j)
|
|
{
|
|
if (m_program.instructions[i].op == CompiledRegex::Save and
|
|
is_assertion(m_program.instructions[j].op))
|
|
std::swap(m_program.instructions[i], m_program.instructions[j]);
|
|
}
|
|
}
|
|
|
|
const ParsedRegex::Node& get_node(ParsedRegex::NodeIndex index) const
|
|
{
|
|
return m_parsed_regex.nodes[index];
|
|
}
|
|
|
|
CompiledRegex m_program;
|
|
RegexCompileFlags m_flags;
|
|
ParsedRegex& m_parsed_regex;
|
|
};
|
|
|
|
String dump_regex(const CompiledRegex& program)
|
|
{
|
|
String res;
|
|
int count = 0;
|
|
for (auto& inst : program.instructions)
|
|
{
|
|
char buf[20];
|
|
sprintf(buf, " %03d ", count++);
|
|
res += buf;
|
|
switch (inst.op)
|
|
{
|
|
case CompiledRegex::Literal:
|
|
res += format("literal {}\n", inst.param);
|
|
break;
|
|
case CompiledRegex::Literal_IgnoreCase:
|
|
res += format("literal (ignore case) {}\n", inst.param);
|
|
break;
|
|
case CompiledRegex::AnyChar:
|
|
res += "any char\n";
|
|
break;
|
|
case CompiledRegex::AnyCharExceptNewLine:
|
|
res += "anything but newline\n";
|
|
break;
|
|
case CompiledRegex::Jump:
|
|
res += format("jump {}\n", inst.param);
|
|
break;
|
|
case CompiledRegex::Split_PrioritizeParent:
|
|
case CompiledRegex::Split_PrioritizeChild:
|
|
{
|
|
res += format("split (prioritize {}) {}\n",
|
|
inst.op == CompiledRegex::Split_PrioritizeParent ? "parent" : "child",
|
|
inst.param);
|
|
break;
|
|
}
|
|
case CompiledRegex::Save:
|
|
res += format("save {}\n", inst.param);
|
|
break;
|
|
case CompiledRegex::Class:
|
|
res += format("class {}\n", inst.param);
|
|
break;
|
|
case CompiledRegex::CharacterType:
|
|
res += format("character type {}\n", inst.param);
|
|
break;
|
|
case CompiledRegex::LineStart:
|
|
res += "line start\n";
|
|
break;
|
|
case CompiledRegex::LineEnd:
|
|
res += "line end\n";
|
|
break;
|
|
case CompiledRegex::WordBoundary:
|
|
res += "word boundary\n";
|
|
break;
|
|
case CompiledRegex::NotWordBoundary:
|
|
res += "not word boundary\n";
|
|
break;
|
|
case CompiledRegex::SubjectBegin:
|
|
res += "subject begin\n";
|
|
break;
|
|
case CompiledRegex::SubjectEnd:
|
|
res += "subject end\n";
|
|
break;
|
|
case CompiledRegex::LookAhead:
|
|
case CompiledRegex::NegativeLookAhead:
|
|
case CompiledRegex::LookBehind:
|
|
case CompiledRegex::NegativeLookBehind:
|
|
case CompiledRegex::LookAhead_IgnoreCase:
|
|
case CompiledRegex::NegativeLookAhead_IgnoreCase:
|
|
case CompiledRegex::LookBehind_IgnoreCase:
|
|
case CompiledRegex::NegativeLookBehind_IgnoreCase:
|
|
{
|
|
const char* name = nullptr;
|
|
if (inst.op == CompiledRegex::LookAhead)
|
|
name = "look ahead";
|
|
if (inst.op == CompiledRegex::NegativeLookAhead)
|
|
name = "negative look ahead";
|
|
if (inst.op == CompiledRegex::LookBehind)
|
|
name = "look behind";
|
|
if (inst.op == CompiledRegex::NegativeLookBehind)
|
|
name = "negative look behind";
|
|
|
|
if (inst.op == CompiledRegex::LookAhead_IgnoreCase)
|
|
name = "look ahead (ignore case)";
|
|
if (inst.op == CompiledRegex::NegativeLookAhead_IgnoreCase)
|
|
name = "negative look ahead (ignore case)";
|
|
if (inst.op == CompiledRegex::LookBehind_IgnoreCase)
|
|
name = "look behind (ignore case)";
|
|
if (inst.op == CompiledRegex::NegativeLookBehind_IgnoreCase)
|
|
name = "negative look behind (ignore case)";
|
|
|
|
String str;
|
|
for (auto it = program.lookarounds.begin() + inst.param;
|
|
*it != CompiledRegex::Lookaround::EndOfLookaround; ++it)
|
|
utf8::dump(std::back_inserter(str), to_underlying(*it));
|
|
res += format("{} ({})\n", name, str);
|
|
break;
|
|
}
|
|
case CompiledRegex::Match:
|
|
res += "match\n";
|
|
}
|
|
}
|
|
auto dump_start_desc = [&](CompiledRegex::StartDesc& desc, StringView name) {
|
|
res += name + " start desc: [";
|
|
for (size_t c = 0; c < CompiledRegex::StartDesc::count; ++c)
|
|
{
|
|
if (desc.map[c])
|
|
{
|
|
if (c < 32)
|
|
res += format("<0x{}>", Hex{c});
|
|
else
|
|
res += (char)c;
|
|
}
|
|
}
|
|
res += "]\n";
|
|
};
|
|
if (program.forward_start_desc)
|
|
dump_start_desc(*program.forward_start_desc, "forward");
|
|
if (program.backward_start_desc)
|
|
dump_start_desc(*program.backward_start_desc, "backward");
|
|
return res;
|
|
}
|
|
|
|
CompiledRegex compile_regex(StringView re, RegexCompileFlags flags)
|
|
{
|
|
return RegexCompiler{RegexParser::parse(re), flags}.get_compiled_regex();
|
|
}
|
|
|
|
bool is_character_class(const CharacterClass& character_class, Codepoint cp)
|
|
{
|
|
if (character_class.ignore_case)
|
|
cp = to_lower(cp);
|
|
|
|
auto it = std::lower_bound(character_class.ranges.begin(),
|
|
character_class.ranges.end(), cp,
|
|
[](auto& range, Codepoint cp)
|
|
{ return range.max < cp; });
|
|
|
|
auto found = (it != character_class.ranges.end() and it->min <= cp) or
|
|
is_ctype(character_class.ctypes, cp);
|
|
|
|
return found != character_class.negative;
|
|
}
|
|
|
|
bool is_ctype(CharacterType ctype, Codepoint cp)
|
|
{
|
|
return ((ctype & CharacterType::Whitespace) and is_blank(cp)) or
|
|
((ctype & CharacterType::HorizontalWhitespace) and is_horizontal_blank(cp)) or
|
|
((ctype & CharacterType::Digit) and iswdigit(cp)) or
|
|
((ctype & CharacterType::Word) and is_word(cp)) or
|
|
((ctype & CharacterType::NotWhitespace) and not is_blank(cp)) or
|
|
((ctype & CharacterType::NotHorizontalWhitespace) and not is_horizontal_blank(cp)) or
|
|
((ctype & CharacterType::NotDigit) and not iswdigit(cp)) or
|
|
((ctype & CharacterType::NotWord) and not is_word(cp));
|
|
}
|
|
|
|
namespace
|
|
{
|
|
template<RegexMode mode = RegexMode::Forward>
|
|
struct TestVM : CompiledRegex, ThreadedRegexVM<const char*, mode>
|
|
{
|
|
using VMType = ThreadedRegexVM<const char*, mode>;
|
|
|
|
TestVM(StringView re, bool dump = false)
|
|
: CompiledRegex{compile_regex(re, mode & RegexMode::Forward ?
|
|
RegexCompileFlags::None : RegexCompileFlags::Backward)},
|
|
VMType{(const CompiledRegex&)*this}
|
|
{ if (dump) puts(dump_regex(*this).c_str()); }
|
|
|
|
bool exec(StringView re, RegexExecFlags flags = RegexExecFlags::None)
|
|
{
|
|
return VMType::exec(re.begin(), re.end(), re.begin(), re.end(), flags);
|
|
}
|
|
};
|
|
}
|
|
|
|
auto test_regex = UnitTest{[]{
|
|
{
|
|
TestVM<> vm{R"(a*b)"};
|
|
kak_assert(vm.exec("b"));
|
|
kak_assert(vm.exec("ab"));
|
|
kak_assert(vm.exec("aaab"));
|
|
kak_assert(not vm.exec("acb"));
|
|
kak_assert(not vm.exec("abc"));
|
|
kak_assert(not vm.exec(""));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"(^a.*b$)"};
|
|
kak_assert(vm.exec("afoob"));
|
|
kak_assert(vm.exec("ab"));
|
|
kak_assert(not vm.exec("bab"));
|
|
kak_assert(not vm.exec(""));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"(^(foo|qux|baz)+(bar)?baz$)"};
|
|
kak_assert(vm.exec("fooquxbarbaz"));
|
|
kak_assert(StringView{vm.captures()[2], vm.captures()[3]} == "qux");
|
|
kak_assert(not vm.exec("fooquxbarbaze"));
|
|
kak_assert(not vm.exec("quxbar"));
|
|
kak_assert(not vm.exec("blahblah"));
|
|
kak_assert(vm.exec("bazbaz"));
|
|
kak_assert(vm.exec("quxbaz"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"(.*\b(foo|bar)\b.*)"};
|
|
kak_assert(vm.exec("qux foo baz"));
|
|
kak_assert(StringView{vm.captures()[2], vm.captures()[3]} == "foo");
|
|
kak_assert(not vm.exec("quxfoobaz"));
|
|
kak_assert(vm.exec("bar"));
|
|
kak_assert(not vm.exec("foobar"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"((foo|bar))"};
|
|
kak_assert(vm.exec("foo"));
|
|
kak_assert(vm.exec("bar"));
|
|
kak_assert(not vm.exec("foobar"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"(a{3,5}b)"};
|
|
kak_assert(not vm.exec("aab"));
|
|
kak_assert(vm.exec("aaab"));
|
|
kak_assert(not vm.exec("aaaaaab"));
|
|
kak_assert(vm.exec("aaaaab"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"(a{3}b)"};
|
|
kak_assert(not vm.exec("aab"));
|
|
kak_assert(vm.exec("aaab"));
|
|
kak_assert(not vm.exec("aaaab"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"(a{3,}b)"};
|
|
kak_assert(not vm.exec("aab"));
|
|
kak_assert(vm.exec("aaab"));
|
|
kak_assert(vm.exec("aaaaab"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"(a{,3}b)"};
|
|
kak_assert(vm.exec("b"));
|
|
kak_assert(vm.exec("ab"));
|
|
kak_assert(vm.exec("aaab"));
|
|
kak_assert(not vm.exec("aaaab"));
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Forward | RegexMode::Search> vm{R"(f.*a(.*o))"};
|
|
kak_assert(vm.exec("blahfoobarfoobaz"));
|
|
kak_assert(StringView{vm.captures()[0], vm.captures()[1]} == "foobarfoo");
|
|
kak_assert(StringView{vm.captures()[2], vm.captures()[3]} == "rfoo");
|
|
kak_assert(vm.exec("mais que fais la police"));
|
|
kak_assert(StringView{vm.captures()[0], vm.captures()[1]} == "fais la po");
|
|
kak_assert(StringView{vm.captures()[2], vm.captures()[3]} == " po");
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"([àb-dX-Z-]{3,5})"};
|
|
kak_assert(vm.exec("cà-Y"));
|
|
kak_assert(not vm.exec("àeY"));
|
|
kak_assert(vm.exec("dcbàX"));
|
|
kak_assert(not vm.exec("efg"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"((a{3,5})a+)"};
|
|
kak_assert(vm.exec("aaaaaa", RegexExecFlags::None));
|
|
kak_assert(StringView{vm.captures()[2], vm.captures()[3]} == "aaaaa");
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"((a{3,5}?)a+)"};
|
|
kak_assert(vm.exec("aaaaaa", RegexExecFlags::None));
|
|
kak_assert(StringView{vm.captures()[2], vm.captures()[3]} == "aaa");
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"((a{3,5}?)a)"};
|
|
kak_assert(vm.exec("aaaa"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"(\d{3})"};
|
|
kak_assert(vm.exec("123"));
|
|
kak_assert(not vm.exec("1x3"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"([-\d]+)"};
|
|
kak_assert(vm.exec("123-456"));
|
|
kak_assert(not vm.exec("123_456"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"([ \H]+)"};
|
|
kak_assert(vm.exec("abc "));
|
|
kak_assert(not vm.exec("a \t"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"(\Q{}[]*+?\Ea+)"};
|
|
kak_assert(vm.exec("{}[]*+?aa"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"(\Q...)"};
|
|
kak_assert(vm.exec("..."));
|
|
kak_assert(not vm.exec("bla"));
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Forward> vm{R"(foo\Kbar)"};
|
|
kak_assert(vm.exec("foobar"));
|
|
kak_assert(StringView{vm.captures()[0], vm.captures()[1]} == "bar");
|
|
kak_assert(not vm.exec("bar"));
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Forward> vm{R"((fo+?).*)"};
|
|
kak_assert(vm.exec("foooo"));
|
|
kak_assert(StringView{vm.captures()[2], vm.captures()[3]} == "fo");
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Forward | RegexMode::Search> vm{R"((?=fo[\w]).)"};
|
|
kak_assert(vm.exec("barfoo"));
|
|
kak_assert(StringView{vm.captures()[0], vm.captures()[1]} == "f");
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"((?<!f).)"};
|
|
kak_assert(vm.exec("f"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"((?!f[oa]o)...)"};
|
|
kak_assert(not vm.exec("foo"));
|
|
kak_assert(vm.exec("qux"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"(...(?<=f\w.))"};
|
|
kak_assert(vm.exec("foo"));
|
|
kak_assert(not vm.exec("qux"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"(...(?<!foo))"};
|
|
kak_assert(not vm.exec("foo"));
|
|
kak_assert(vm.exec("qux"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"(Foo(?i)f[oB]+)"};
|
|
kak_assert(vm.exec("FooFOoBb"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"([^\]]+)"};
|
|
kak_assert(not vm.exec("a]c"));
|
|
kak_assert(vm.exec("abc"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"([^:\n]+)"};
|
|
kak_assert(not vm.exec("\nbc"));
|
|
kak_assert(vm.exec("abc"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"((?:foo)+)"};
|
|
kak_assert(vm.exec("foofoofoo"));
|
|
kak_assert(not vm.exec("barbarbar"));
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Forward | RegexMode::Search> vm{R"((?<!\\)(?:\\\\)*")"};
|
|
kak_assert(vm.exec("foo\""));
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Forward | RegexMode::Search> vm{R"($)"};
|
|
kak_assert(vm.exec("foo\n"));
|
|
kak_assert(*vm.captures()[0] == '\n');
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Backward | RegexMode::Search> vm{R"(fo{1,})"};
|
|
kak_assert(vm.exec("foo1fooo2"));
|
|
kak_assert(*vm.captures()[1] == '2');
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Backward | RegexMode::Search> vm{R"((?<=f)oo(b[ae]r)?(?=baz))"};
|
|
kak_assert(vm.exec("foobarbazfoobazfooberbaz"));
|
|
kak_assert(StringView{vm.captures()[0], vm.captures()[1]} == "oober");
|
|
kak_assert(StringView{vm.captures()[2], vm.captures()[3]} == "ber");
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Backward | RegexMode::Search> vm{R"((baz|boz|foo|qux)(?<!baz)(?<!o))"};
|
|
kak_assert(vm.exec("quxbozfoobaz"));
|
|
kak_assert(StringView{vm.captures()[0], vm.captures()[1]} == "boz");
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Backward | RegexMode::Search> vm{R"(foo)"};
|
|
kak_assert(vm.exec("foofoo"));
|
|
kak_assert(*vm.captures()[1] == 0);
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Backward | RegexMode::Search> vm{R"($)"};
|
|
kak_assert(vm.exec("foo\nbar\nbaz\nqux", RegexExecFlags::NotEndOfLine));
|
|
kak_assert(StringView{vm.captures()[0]} == "\nqux");
|
|
kak_assert(vm.exec("foo\nbar\nbaz\nqux", RegexExecFlags::None));
|
|
kak_assert(StringView{vm.captures()[0]} == "");
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Backward | RegexMode::Search> vm{R"(^)"};
|
|
kak_assert(not vm.exec("foo", RegexExecFlags::NotBeginOfLine));
|
|
kak_assert(vm.exec("foo", RegexExecFlags::None));
|
|
kak_assert(vm.exec("foo\nbar", RegexExecFlags::None));
|
|
kak_assert(StringView{vm.captures()[0]} == "bar");
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Backward | RegexMode::Search> vm{R"(\A\w+)"};
|
|
kak_assert(vm.exec("foo\nbar\nbaz", RegexExecFlags::None));
|
|
kak_assert(StringView{vm.captures()[0], vm.captures()[1]} == "foo");
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Backward | RegexMode::Search> vm{R"(\b\w+\z)"};
|
|
kak_assert(vm.exec("foo\nbar\nbaz", RegexExecFlags::None));
|
|
kak_assert(StringView{vm.captures()[0], vm.captures()[1]} == "baz");
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"(()*)"};
|
|
kak_assert(not vm.exec(" "));
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Forward | RegexMode::Search> vm{R"(\b(?<!-)(a|b|)(?!-)\b)"};
|
|
kak_assert(vm.exec("# foo bar", RegexExecFlags::None));
|
|
kak_assert(*vm.captures()[0] == '#');
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"((?=))"};
|
|
kak_assert(vm.exec(""));
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Forward | RegexMode::Search> vm{R"((?i)FOO)"};
|
|
kak_assert(vm.exec("foo", RegexExecFlags::None));
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Forward | RegexMode::Search> vm{R"(.?(?=foo))"};
|
|
kak_assert(vm.exec("afoo", RegexExecFlags::None));
|
|
kak_assert(*vm.captures()[0] == 'a');
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Forward | RegexMode::Search> vm{R"((?i)(?=Foo))"};
|
|
kak_assert(vm.exec("fOO", RegexExecFlags::None));
|
|
kak_assert(*vm.captures()[0] == 'f');
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"([d-ea-dcf-k]+)"};
|
|
kak_assert(vm.exec("abcde"));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"((?i)[a-c]+)"};
|
|
kak_assert(vm.exec("bCa"));
|
|
}
|
|
|
|
{
|
|
TestVM<RegexMode::Forward | RegexMode::Search> vm{R"(д)"};
|
|
kak_assert(vm.exec("д", RegexExecFlags::None));
|
|
}
|
|
|
|
{
|
|
TestVM<> vm{R"(\0\x0A\u260e\u260F)"};
|
|
const char str[] = "\0\n☎☏"; // work around the null byte in the literal
|
|
kak_assert(vm.exec({str, str + sizeof(str)-1}));
|
|
}
|
|
|
|
{
|
|
auto eq = [](const CompiledRegex::NamedCapture& lhs,
|
|
const CompiledRegex::NamedCapture& rhs) {
|
|
return lhs.name == rhs.name and
|
|
lhs.index == rhs.index;
|
|
};
|
|
|
|
TestVM<> vm{R"((?<year>\d+)-(?<month>\d+)-(?<day>\d+))"};
|
|
kak_assert(vm.exec("2019-01-03", RegexExecFlags::None));
|
|
kak_assert(StringView{vm.captures()[2], vm.captures()[3]} == "2019");
|
|
kak_assert(StringView{vm.captures()[4], vm.captures()[5]} == "01");
|
|
kak_assert(StringView{vm.captures()[6], vm.captures()[7]} == "03");
|
|
kak_assert(vm.named_captures.size() == 3);
|
|
kak_assert(eq(vm.named_captures[0], {"year", 1}));
|
|
kak_assert(eq(vm.named_captures[1], {"month", 2}));
|
|
kak_assert(eq(vm.named_captures[2], {"day", 3}));
|
|
}
|
|
}};
|
|
|
|
}
|