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AST.h
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AST.h
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/*
* Copyright (c) 2020, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include "Forward.h"
#include "Job.h"
#include "NodeVisitor.h"
#include <AK/Format.h>
#include <AK/NonnullRefPtr.h>
#include <AK/RefCounted.h>
#include <AK/RefPtr.h>
#include <AK/String.h>
#include <AK/Types.h>
#include <AK/Vector.h>
#include <LibLine/Editor.h>
#include <LibRegex/Regex.h>
namespace Shell::AST {
using AK::make_ref_counted;
template<typename T>
static inline NonnullRefPtr<T> make_ref_counted(std::initializer_list<NonnullRefPtr<Value>> arg)
{
return adopt_ref(*new T(arg));
}
struct HighlightMetadata {
bool is_first_in_list { true };
};
struct Position {
size_t start_offset { 0 };
size_t end_offset { 0 };
struct Line {
size_t line_number { 0 };
size_t line_column { 0 };
bool operator==(Line const& other) const
{
return line_number == other.line_number && line_column == other.line_column;
}
} start_line, end_line;
bool contains(size_t offset) const { return start_offset <= offset && offset <= end_offset; }
};
struct NameWithPosition {
String name;
Position position;
};
struct FdRedirection;
struct Rewiring : public RefCounted<Rewiring> {
int old_fd { -1 };
int new_fd { -1 };
FdRedirection* other_pipe_end { nullptr };
enum class Close {
None,
Old,
New,
RefreshNew,
RefreshOld,
ImmediatelyCloseNew,
} fd_action { Close::None };
Rewiring(int source, int dest, Close close = Close::None)
: old_fd(source)
, new_fd(dest)
, fd_action(close)
{
}
Rewiring(int source, int dest, FdRedirection* other_end, Close close)
: old_fd(source)
, new_fd(dest)
, other_pipe_end(other_end)
, fd_action(close)
{
}
};
struct Redirection : public RefCounted<Redirection> {
virtual ErrorOr<NonnullRefPtr<Rewiring>> apply() const = 0;
virtual ~Redirection();
virtual bool is_path_redirection() const { return false; }
virtual bool is_fd_redirection() const { return false; }
virtual bool is_close_redirection() const { return false; }
};
struct CloseRedirection : public Redirection {
int fd { -1 };
virtual ErrorOr<NonnullRefPtr<Rewiring>> apply() const override;
virtual ~CloseRedirection();
CloseRedirection(int fd)
: fd(fd)
{
}
private:
virtual bool is_close_redirection() const override { return true; }
};
struct PathRedirection : public Redirection {
String path;
int fd { -1 };
enum {
Read,
Write,
WriteAppend,
ReadWrite,
} direction { Read };
static NonnullRefPtr<PathRedirection> create(String path, int fd, decltype(direction) direction)
{
return adopt_ref(*new PathRedirection(move(path), fd, direction));
}
virtual ErrorOr<NonnullRefPtr<Rewiring>> apply() const override;
virtual ~PathRedirection();
private:
PathRedirection(String path, int fd, decltype(direction) direction)
: path(move(path))
, fd(fd)
, direction(direction)
{
}
virtual bool is_path_redirection() const override { return true; }
};
struct FdRedirection : public Redirection {
public:
static NonnullRefPtr<FdRedirection> create(int old_fd, int new_fd, Rewiring::Close close)
{
return adopt_ref(*new FdRedirection(old_fd, new_fd, close));
}
static NonnullRefPtr<FdRedirection> create(int old_fd, int new_fd, FdRedirection* pipe_end, Rewiring::Close close)
{
return adopt_ref(*new FdRedirection(old_fd, new_fd, pipe_end, close));
}
virtual ~FdRedirection();
virtual ErrorOr<NonnullRefPtr<Rewiring>> apply() const override
{
return adopt_ref(*new Rewiring(old_fd, new_fd, other_pipe_end, action));
}
int old_fd { -1 };
int new_fd { -1 };
FdRedirection* other_pipe_end { nullptr };
Rewiring::Close action { Rewiring::Close::None };
private:
FdRedirection(int source, int dest, Rewiring::Close close)
: FdRedirection(source, dest, nullptr, close)
{
}
FdRedirection(int old_fd, int new_fd, FdRedirection* pipe_end, Rewiring::Close close)
: old_fd(old_fd)
, new_fd(new_fd)
, other_pipe_end(pipe_end)
, action(close)
{
}
virtual bool is_fd_redirection() const override { return true; }
};
class Pipeline : public RefCounted<Pipeline> {
public:
pid_t pgid { -1 };
};
struct NodeWithAction {
mutable NonnullRefPtr<Node> node;
enum Action {
And,
Or,
Sequence,
} action;
NodeWithAction(Node& node, Action action)
: node(node)
, action(action)
{
}
};
struct Command {
Vector<String> argv;
NonnullRefPtrVector<Redirection> redirections;
bool should_wait { true };
bool is_pipe_source { false };
bool should_notify_if_in_background { true };
bool should_immediately_execute_next { false };
mutable RefPtr<Pipeline> pipeline;
Vector<NodeWithAction> next_chain;
Optional<Position> position;
};
struct HitTestResult {
RefPtr<Node> matching_node;
RefPtr<Node> closest_node_with_semantic_meaning; // This is used if matching_node is a bareword
RefPtr<Node> closest_command_node; // This is used if matching_node is a bareword, and it is not the first in a list
};
class Value : public RefCounted<Value> {
public:
virtual Vector<String> resolve_as_list(RefPtr<Shell>) = 0;
virtual String resolve_as_string(RefPtr<Shell> shell);
virtual Vector<Command> resolve_as_commands(RefPtr<Shell>);
virtual NonnullRefPtr<Value> resolve_without_cast(RefPtr<Shell>) { return *this; }
virtual NonnullRefPtr<Value> clone() const = 0;
virtual NonnullRefPtr<Value> with_slices(NonnullRefPtr<Slice> slice) const&;
virtual NonnullRefPtr<Value> with_slices(NonnullRefPtrVector<Slice> slices) const&;
virtual ~Value();
virtual bool is_command() const { return false; }
virtual bool is_glob() const { return false; }
virtual bool is_job() const { return false; }
virtual bool is_list() const { return false; }
virtual bool is_string() const { return false; }
virtual bool is_list_without_resolution() const { return false; }
protected:
Value& set_slices(NonnullRefPtrVector<Slice> slices)
{
m_slices = move(slices);
return *this;
}
NonnullRefPtrVector<Slice> m_slices;
};
class CommandValue final : public Value {
public:
virtual Vector<String> resolve_as_list(RefPtr<Shell>) override;
virtual Vector<Command> resolve_as_commands(RefPtr<Shell>) override;
virtual NonnullRefPtr<Value> clone() const override { return make_ref_counted<CommandValue>(m_command)->set_slices(m_slices); }
virtual ~CommandValue();
virtual bool is_command() const override { return true; }
CommandValue(Command command)
: m_command(move(command))
{
}
CommandValue(Vector<String> argv, Position position)
: m_command({ move(argv), {}, true, false, true, false, nullptr, {}, move(position) })
{
}
private:
Command m_command;
};
class CommandSequenceValue final : public Value {
public:
virtual Vector<String> resolve_as_list(RefPtr<Shell>) override;
virtual Vector<Command> resolve_as_commands(RefPtr<Shell>) override;
virtual NonnullRefPtr<Value> clone() const override { return make_ref_counted<CommandSequenceValue>(m_contained_values)->set_slices(m_slices); }
virtual ~CommandSequenceValue();
virtual bool is_command() const override { return true; }
CommandSequenceValue(Vector<Command> commands)
: m_contained_values(move(commands))
{
}
private:
Vector<Command> m_contained_values;
};
class JobValue final : public Value {
public:
virtual Vector<String> resolve_as_list(RefPtr<Shell>) override { VERIFY_NOT_REACHED(); }
virtual String resolve_as_string(RefPtr<Shell>) override { return String::formatted("%{}", m_job->job_id()); }
virtual Vector<Command> resolve_as_commands(RefPtr<Shell>) override { VERIFY_NOT_REACHED(); }
virtual NonnullRefPtr<Value> clone() const override { return make_ref_counted<JobValue>(m_job)->set_slices(m_slices); }
virtual ~JobValue();
virtual bool is_job() const override { return true; }
JobValue(RefPtr<Job> job)
: m_job(move(job))
{
}
RefPtr<Job> const job() const { return m_job; }
private:
RefPtr<Job> m_job;
};
class ListValue final : public Value {
public:
virtual Vector<String> resolve_as_list(RefPtr<Shell>) override;
virtual NonnullRefPtr<Value> resolve_without_cast(RefPtr<Shell>) override;
virtual NonnullRefPtr<Value> clone() const override { return make_ref_counted<ListValue>(m_contained_values)->set_slices(m_slices); }
virtual ~ListValue();
virtual bool is_list() const override { return true; }
virtual bool is_list_without_resolution() const override { return true; }
ListValue(Vector<String> values);
ListValue(Vector<NonnullRefPtr<Value>> values)
: m_contained_values(move(static_cast<NonnullRefPtrVector<Value>&>(values)))
{
}
ListValue(NonnullRefPtrVector<Value> values)
: m_contained_values(move(values))
{
}
NonnullRefPtrVector<Value> const& values() const { return m_contained_values; }
NonnullRefPtrVector<Value>& values() { return m_contained_values; }
private:
NonnullRefPtrVector<Value> m_contained_values;
};
class StringValue final : public Value {
public:
virtual Vector<String> resolve_as_list(RefPtr<Shell>) override;
virtual String resolve_as_string(RefPtr<Shell> shell) override;
virtual NonnullRefPtr<Value> clone() const override { return make_ref_counted<StringValue>(m_string, m_split, m_keep_empty)->set_slices(m_slices); }
virtual ~StringValue();
virtual bool is_string() const override { return m_split.is_null(); }
virtual bool is_list() const override { return !m_split.is_null(); }
NonnullRefPtr<Value> resolve_without_cast(RefPtr<Shell>) override;
StringValue(String string, String split_by = {}, bool keep_empty = false)
: m_string(move(string))
, m_split(move(split_by))
, m_keep_empty(keep_empty)
{
}
private:
String m_string;
String m_split;
bool m_keep_empty { false };
};
class GlobValue final : public Value {
public:
virtual Vector<String> resolve_as_list(RefPtr<Shell>) override;
virtual NonnullRefPtr<Value> clone() const override { return make_ref_counted<GlobValue>(m_glob, m_generation_position)->set_slices(m_slices); }
virtual ~GlobValue();
virtual bool is_glob() const override { return true; }
GlobValue(String glob, Position position)
: m_glob(move(glob))
, m_generation_position(move(position))
{
}
private:
String m_glob;
Position m_generation_position;
};
class SimpleVariableValue final : public Value {
public:
virtual Vector<String> resolve_as_list(RefPtr<Shell>) override;
virtual String resolve_as_string(RefPtr<Shell>) override;
virtual NonnullRefPtr<Value> resolve_without_cast(RefPtr<Shell>) override;
virtual NonnullRefPtr<Value> clone() const override { return make_ref_counted<SimpleVariableValue>(m_name)->set_slices(m_slices); }
virtual ~SimpleVariableValue();
SimpleVariableValue(String name)
: m_name(move(name))
{
}
private:
String m_name;
};
class SpecialVariableValue final : public Value {
public:
virtual Vector<String> resolve_as_list(RefPtr<Shell>) override;
virtual String resolve_as_string(RefPtr<Shell>) override;
virtual NonnullRefPtr<Value> resolve_without_cast(RefPtr<Shell>) override;
virtual NonnullRefPtr<Value> clone() const override { return make_ref_counted<SpecialVariableValue>(m_name)->set_slices(m_slices); }
virtual ~SpecialVariableValue();
SpecialVariableValue(char name)
: m_name(name)
{
}
private:
char m_name { 0 };
};
class TildeValue final : public Value {
public:
virtual Vector<String> resolve_as_list(RefPtr<Shell>) override;
virtual String resolve_as_string(RefPtr<Shell>) override;
virtual NonnullRefPtr<Value> clone() const override { return make_ref_counted<TildeValue>(m_username)->set_slices(m_slices); }
virtual ~TildeValue();
virtual bool is_string() const override { return true; }
TildeValue(String name)
: m_username(move(name))
{
}
private:
String m_username;
};
class Node : public RefCounted<Node> {
AK_MAKE_NONCOPYABLE(Node);
AK_MAKE_NONMOVABLE(Node);
public:
virtual void dump(int level) const = 0;
virtual void for_each_entry(RefPtr<Shell> shell, Function<IterationDecision(NonnullRefPtr<Value>)> callback);
virtual RefPtr<Value> run(RefPtr<Shell>) = 0;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) = 0;
virtual Vector<Line::CompletionSuggestion> complete_for_editor(Shell&, size_t, HitTestResult const&);
Vector<Line::CompletionSuggestion> complete_for_editor(Shell& shell, size_t offset);
virtual HitTestResult hit_test_position(size_t offset) const
{
if (m_position.contains(offset))
return { this, nullptr, nullptr };
return { nullptr, nullptr, nullptr };
}
virtual String class_name() const { return "Node"; }
Node(Position);
virtual ~Node() = default;
virtual bool is_bareword() const { return false; }
virtual bool is_command() const { return false; }
virtual bool is_execute() const { return false; }
virtual bool is_glob() const { return false; }
virtual bool is_tilde() const { return false; }
virtual bool is_variable_decls() const { return false; }
virtual bool is_simple_variable() const { return false; }
virtual bool is_syntax_error() const;
virtual bool is_list() const { return false; }
virtual bool would_execute() const { return false; }
virtual bool should_override_execution_in_current_process() const { return false; }
Position const& position() const { return m_position; }
virtual void clear_syntax_error();
virtual void set_is_syntax_error(SyntaxError const& error_node);
virtual SyntaxError const& syntax_error_node() const
{
VERIFY(is_syntax_error());
return *m_syntax_error_node;
}
virtual RefPtr<Node> leftmost_trivial_literal() const { return nullptr; }
Vector<Command> to_lazy_evaluated_commands(RefPtr<Shell> shell);
virtual void visit(NodeVisitor&) { VERIFY_NOT_REACHED(); }
virtual void visit(NodeVisitor& visitor) const { const_cast<Node*>(this)->visit(visitor); }
enum class Kind : u32 {
And,
Background,
BarewordLiteral,
BraceExpansion,
CastToCommand,
CastToList,
CloseFdRedirection,
CommandLiteral,
Comment,
ContinuationControl,
DoubleQuotedString,
DynamicEvaluate,
Execute,
Fd2FdRedirection,
ForLoop,
FunctionDeclaration,
Glob,
Heredoc,
HistoryEvent,
IfCond,
ImmediateExpression,
Join,
Juxtaposition,
ListConcatenate,
MatchExpr,
Or,
Pipe,
Range,
ReadRedirection,
ReadWriteRedirection,
Sequence,
Slice,
SimpleVariable,
SpecialVariable,
StringLiteral,
StringPartCompose,
Subshell,
SyntaxError,
SyntheticValue,
Tilde,
VariableDeclarations,
WriteAppendRedirection,
WriteRedirection,
__Count,
};
virtual Kind kind() const = 0;
protected:
Position m_position;
RefPtr<SyntaxError> m_syntax_error_node;
};
#define NODE(name) \
virtual String class_name() const override \
{ \
return #name; \
} \
virtual Kind kind() const override \
{ \
return Kind::name; \
}
class PathRedirectionNode : public Node {
public:
PathRedirectionNode(Position, int, NonnullRefPtr<Node>);
virtual ~PathRedirectionNode();
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
virtual Vector<Line::CompletionSuggestion> complete_for_editor(Shell&, size_t, HitTestResult const&) override;
virtual HitTestResult hit_test_position(size_t offset) const override;
virtual bool is_command() const override { return true; }
virtual bool is_list() const override { return true; }
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
NonnullRefPtr<Node> const& path() const { return m_path; }
int fd() const { return m_fd; }
protected:
int m_fd { -1 };
NonnullRefPtr<Node> m_path;
};
class And final : public Node {
public:
And(Position, NonnullRefPtr<Node>, NonnullRefPtr<Node>, Position and_position);
virtual ~And() = default;
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
NonnullRefPtr<Node> const& left() const { return m_left; }
NonnullRefPtr<Node> const& right() const { return m_right; }
Position const& and_position() const { return m_and_position; }
private:
NODE(And);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
virtual HitTestResult hit_test_position(size_t) const override;
NonnullRefPtr<Node> m_left;
NonnullRefPtr<Node> m_right;
Position m_and_position;
};
class ListConcatenate final : public Node {
public:
ListConcatenate(Position, Vector<NonnullRefPtr<Node>>);
virtual ~ListConcatenate() = default;
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
Vector<NonnullRefPtr<Node>> const list() const { return m_list; }
private:
NODE(ListConcatenate);
virtual void dump(int level) const override;
virtual void for_each_entry(RefPtr<Shell> shell, Function<IterationDecision(NonnullRefPtr<Value>)> callback) override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
virtual HitTestResult hit_test_position(size_t) const override;
virtual bool is_list() const override { return true; }
virtual RefPtr<Node> leftmost_trivial_literal() const override;
Vector<NonnullRefPtr<Node>> m_list;
};
class Background final : public Node {
public:
Background(Position, NonnullRefPtr<Node>);
virtual ~Background() = default;
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
NonnullRefPtr<Node> const& command() const { return m_command; }
private:
NODE(Background);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
virtual HitTestResult hit_test_position(size_t) const override;
NonnullRefPtr<Node> m_command;
};
class BarewordLiteral final : public Node {
public:
BarewordLiteral(Position, String);
virtual ~BarewordLiteral() = default;
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
String const& text() const { return m_text; }
private:
NODE(BarewordLiteral);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
virtual bool is_bareword() const override { return true; }
virtual RefPtr<Node> leftmost_trivial_literal() const override { return this; }
String m_text;
};
class BraceExpansion final : public Node {
public:
BraceExpansion(Position, NonnullRefPtrVector<Node>);
virtual ~BraceExpansion() = default;
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
NonnullRefPtrVector<Node> const& entries() const { return m_entries; }
private:
NODE(BraceExpansion);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
virtual HitTestResult hit_test_position(size_t) const override;
NonnullRefPtrVector<Node> m_entries;
};
class CastToCommand final : public Node {
public:
CastToCommand(Position, NonnullRefPtr<Node>);
virtual ~CastToCommand() = default;
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
NonnullRefPtr<Node> const& inner() const { return m_inner; }
private:
NODE(CastToCommand);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
virtual HitTestResult hit_test_position(size_t) const override;
virtual Vector<Line::CompletionSuggestion> complete_for_editor(Shell&, size_t, HitTestResult const&) override;
virtual bool is_command() const override { return true; }
virtual bool is_list() const override { return true; }
virtual RefPtr<Node> leftmost_trivial_literal() const override;
NonnullRefPtr<Node> m_inner;
};
class CastToList final : public Node {
public:
CastToList(Position, RefPtr<Node>);
virtual ~CastToList() = default;
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
RefPtr<Node> const& inner() const { return m_inner; }
private:
NODE(CastToList);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void for_each_entry(RefPtr<Shell> shell, Function<IterationDecision(NonnullRefPtr<Value>)> callback) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
virtual HitTestResult hit_test_position(size_t) const override;
virtual bool is_list() const override { return true; }
virtual RefPtr<Node> leftmost_trivial_literal() const override;
RefPtr<Node> m_inner;
};
class CloseFdRedirection final : public Node {
public:
CloseFdRedirection(Position, int);
virtual ~CloseFdRedirection();
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
int fd() const { return m_fd; }
private:
NODE(CloseFdRedirection);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
virtual bool is_command() const override { return true; }
int m_fd { -1 };
};
class CommandLiteral final : public Node {
public:
CommandLiteral(Position, Command);
virtual ~CommandLiteral();
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
Command const& command() const { return m_command; }
private:
NODE(CommandLiteral);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override { VERIFY_NOT_REACHED(); }
virtual bool is_command() const override { return true; }
virtual bool is_list() const override { return true; }
Command m_command;
};
class Comment : public Node {
public:
Comment(Position, String);
virtual ~Comment();
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
String const& text() const { return m_text; }
private:
NODE(Comment);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
String m_text;
};
class ContinuationControl final : public Node {
public:
enum ContinuationKind {
Break,
Continue,
};
ContinuationControl(Position position, ContinuationKind kind)
: Node(move(position))
, m_kind(kind)
{
}
virtual ~ContinuationControl() = default;
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
ContinuationKind continuation_kind() const { return m_kind; }
private:
NODE(ContinuationControl);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
ContinuationKind m_kind { ContinuationKind::Break };
};
class DynamicEvaluate final : public Node {
public:
DynamicEvaluate(Position, NonnullRefPtr<Node>);
virtual ~DynamicEvaluate();
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
NonnullRefPtr<Node> const& inner() const { return m_inner; }
private:
NODE(DynamicEvaluate);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
virtual HitTestResult hit_test_position(size_t) const override;
virtual bool is_bareword() const override { return m_inner->is_bareword(); }
virtual bool is_command() const override { return is_list(); }
virtual bool is_execute() const override { return true; }
virtual bool is_glob() const override { return m_inner->is_glob(); }
virtual bool is_list() const override
{
return m_inner->is_list() || m_inner->is_command() || m_inner->is_glob(); // Anything that generates a list.
}
NonnullRefPtr<Node> m_inner;
};
class DoubleQuotedString final : public Node {
public:
DoubleQuotedString(Position, RefPtr<Node>);
virtual ~DoubleQuotedString();
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
RefPtr<Node> const& inner() const { return m_inner; }
private:
NODE(DoubleQuotedString);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
virtual HitTestResult hit_test_position(size_t) const override;
RefPtr<Node> m_inner;
};
class Fd2FdRedirection final : public Node {
public:
Fd2FdRedirection(Position, int, int);
virtual ~Fd2FdRedirection();
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
int source_fd() const { return m_old_fd; }
int dest_fd() const { return m_new_fd; }
private:
NODE(Fd2FdRedirection);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
virtual bool is_command() const override { return true; }
int m_old_fd { -1 };
int m_new_fd { -1 };
};
class FunctionDeclaration final : public Node {
public:
FunctionDeclaration(Position, NameWithPosition name, Vector<NameWithPosition> argument_names, RefPtr<AST::Node> body);
virtual ~FunctionDeclaration();
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
NameWithPosition const& name() const { return m_name; }
Vector<NameWithPosition> const arguments() const { return m_arguments; }
RefPtr<Node> const& block() const { return m_block; }
private:
NODE(FunctionDeclaration);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
virtual HitTestResult hit_test_position(size_t) const override;
virtual Vector<Line::CompletionSuggestion> complete_for_editor(Shell&, size_t, HitTestResult const&) override;
virtual bool would_execute() const override { return true; }
virtual bool should_override_execution_in_current_process() const override { return true; }
NameWithPosition m_name;
Vector<NameWithPosition> m_arguments;
RefPtr<AST::Node> m_block;
};
class ForLoop final : public Node {
public:
ForLoop(Position, Optional<NameWithPosition> variable, Optional<NameWithPosition> index_variable, RefPtr<AST::Node> iterated_expr, RefPtr<AST::Node> block, Optional<Position> in_kw_position = {}, Optional<Position> index_kw_position = {});
virtual ~ForLoop();
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
Optional<NameWithPosition> const& variable() const { return m_variable; }
Optional<NameWithPosition> const& index_variable() const { return m_index_variable; }
RefPtr<Node> const& iterated_expression() const { return m_iterated_expression; }
RefPtr<Node> const& block() const { return m_block; }
Optional<Position> const index_keyword_position() const { return m_index_kw_position; }
Optional<Position> const in_keyword_position() const { return m_in_kw_position; }
private:
NODE(ForLoop);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
virtual HitTestResult hit_test_position(size_t) const override;
virtual bool would_execute() const override { return true; }
virtual bool should_override_execution_in_current_process() const override { return true; }
Optional<NameWithPosition> m_variable;
Optional<NameWithPosition> m_index_variable;
RefPtr<AST::Node> m_iterated_expression;
RefPtr<AST::Node> m_block;
Optional<Position> m_in_kw_position;
Optional<Position> m_index_kw_position;
};
class Glob final : public Node {
public:
Glob(Position, String);
virtual ~Glob();
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
String const& text() const { return m_text; }
private:
NODE(Glob);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
virtual bool is_glob() const override { return true; }
virtual bool is_list() const override { return true; }
String m_text;
};
struct HistorySelector {
enum EventKind {
IndexFromStart,
IndexFromEnd,
StartingStringLookup,
ContainingStringLookup,
};
enum WordSelectorKind {
Index,
Last,
};
struct {
EventKind kind { IndexFromStart };
size_t index { 0 };
Position text_position;
String text;
} event;
struct WordSelector {
WordSelectorKind kind { Index };
size_t selector { 0 };
Position position;
RefPtr<AST::SyntaxError> syntax_error_node;
size_t resolve(size_t size) const
{
if (kind == Index)
return selector;
if (kind == Last)
return size - selector - 1;
VERIFY_NOT_REACHED();
}
};
struct {
WordSelector start;
Optional<WordSelector> end;
} word_selector_range;
};
class HistoryEvent final : public Node {
public:
HistoryEvent(Position, HistorySelector);
virtual ~HistoryEvent();
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
HistorySelector const& selector() const { return m_selector; }
private:
NODE(HistoryEvent);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
HistorySelector m_selector;
};
class Execute final : public Node {
public:
Execute(Position, NonnullRefPtr<Node>, bool capture_stdout = false);
virtual ~Execute();
void capture_stdout() { m_capture_stdout = true; }
NonnullRefPtr<Node>& command() { return m_command; }
virtual void for_each_entry(RefPtr<Shell> shell, Function<IterationDecision(NonnullRefPtr<Value>)> callback) override;
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
NonnullRefPtr<Node> const& command() const { return m_command; }
bool does_capture_stdout() const { return m_capture_stdout; }
private:
NODE(Execute);
virtual void dump(int level) const override;
virtual RefPtr<Value> run(RefPtr<Shell>) override;
virtual void highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata = {}) override;
virtual HitTestResult hit_test_position(size_t) const override;
virtual Vector<Line::CompletionSuggestion> complete_for_editor(Shell&, size_t, HitTestResult const&) override;
virtual bool is_execute() const override { return true; }
virtual bool would_execute() const override { return true; }
NonnullRefPtr<Node> m_command;
bool m_capture_stdout { false };
};
class IfCond final : public Node {
public:
IfCond(Position, Optional<Position> else_position, NonnullRefPtr<AST::Node> cond_expr, RefPtr<AST::Node> true_branch, RefPtr<AST::Node> false_branch);
virtual ~IfCond();
virtual void visit(NodeVisitor& visitor) override { visitor.visit(this); }
NonnullRefPtr<Node> const& condition() const { return m_condition; }
RefPtr<Node> const& true_branch() const { return m_true_branch; }
RefPtr<Node> const& false_branch() const { return m_false_branch; }
Optional<Position> const else_position() const { return m_else_position; }
private:
NODE(IfCond);
virtual void dump(int level) const override;