//===-- ProtocolTypes.h ---------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains POD structs based on the DAP specification at
// https://microsoft.github.io/debug-adapter-protocol/specification
//
// This is not meant to be a complete implementation, new interfaces are added
// when they're needed.
//
// Each struct has a toJSON and fromJSON function, that converts between
// the struct and a JSON representation. (See JSON.h)
//
//===----------------------------------------------------------------------===//

#ifndef LLDB_TOOLS_LLDB_DAP_PROTOCOL_PROTOCOL_TYPES_H
#define LLDB_TOOLS_LLDB_DAP_PROTOCOL_PROTOCOL_TYPES_H

#include "lldb/lldb-defines.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/Support/JSON.h"
#include <cstdint>
#include <optional>
#include <string>

#define LLDB_DAP_INVALID_VARRERF UINT64_MAX
#define LLDB_DAP_INVALID_SRC_REF 0

namespace lldb_dap::protocol {

/// An `ExceptionBreakpointsFilter` is shown in the UI as an filter option for
/// configuring how exceptions are dealt with.
struct ExceptionBreakpointsFilter {
  /// The internal ID of the filter option. This value is passed to the
  /// `setExceptionBreakpoints` request.
  std::string filter;

  /// The name of the filter option. This is shown in the UI.
  std::string label;

  /// A help text providing additional information about the exception filter.
  /// This string is typically shown as a hover and can be translated.
  std::string description;

  /// Initial value of the filter option. If not specified a value false is
  /// assumed.
  bool defaultState = false;

  /// Controls whether a condition can be specified for this filter option. If
  /// false or missing, a condition can not be set.
  bool supportsCondition = false;

  /// A help text providing information about the condition. This string is
  /// shown as the placeholder text for a text box and can be translated.
  std::string conditionDescription;
};
bool fromJSON(const llvm::json::Value &, ExceptionBreakpointsFilter &,
              llvm::json::Path);
llvm::json::Value toJSON(const ExceptionBreakpointsFilter &);

enum ColumnType : unsigned {
  eColumnTypeString,
  eColumnTypeNumber,
  eColumnTypeBoolean,
  eColumnTypeTimestamp
};
bool fromJSON(const llvm::json::Value &, ColumnType &, llvm::json::Path);
llvm::json::Value toJSON(const ColumnType &);

/// A ColumnDescriptor specifies what module attribute to show in a column of
/// the modules view, how to format it, and what the column’s label should be.
///
/// It is only used if the underlying UI actually supports this level of
/// customization.
struct ColumnDescriptor {
  /// Name of the attribute rendered in this column.
  std::string attributeName;

  /// Header UI label of column.
  std::string label;

  /// Format to use for the rendered values in this column. TBD how the format
  /// strings looks like.
  std::optional<std::string> format;

  /// Datatype of values in this column. Defaults to `string` if not specified.
  /// Values: 'string', 'number', 'boolean', 'unixTimestampUTC'.
  std::optional<ColumnType> type;

  /// Width of this column in characters (hint only).
  std::optional<int> width;
};
bool fromJSON(const llvm::json::Value &, ColumnDescriptor &, llvm::json::Path);
llvm::json::Value toJSON(const ColumnDescriptor &);

/// Names of checksum algorithms that may be supported by a debug adapter.
/// Values: ‘MD5’, ‘SHA1’, ‘SHA256’, ‘timestamp’.
enum ChecksumAlgorithm : unsigned {
  eChecksumAlgorithmMD5,
  eChecksumAlgorithmSHA1,
  eChecksumAlgorithmSHA256,
  eChecksumAlgorithmTimestamp
};
bool fromJSON(const llvm::json::Value &, ChecksumAlgorithm &, llvm::json::Path);
llvm::json::Value toJSON(const ChecksumAlgorithm &);

/// Describes one or more type of breakpoint a BreakpointMode applies to. This
/// is a non-exhaustive enumeration and may expand as future breakpoint types
/// are added.
enum BreakpointModeApplicability : unsigned {
  /// In `SourceBreakpoint`'s.
  eBreakpointModeApplicabilitySource,
  /// In exception breakpoints applied in the `ExceptionFilterOptions`.
  eBreakpointModeApplicabilityException,
  /// In data breakpoints requested in the `DataBreakpointInfo` request.
  eBreakpointModeApplicabilityData,
  /// In `InstructionBreakpoint`'s.
  eBreakpointModeApplicabilityInstruction
};
bool fromJSON(const llvm::json::Value &, BreakpointModeApplicability &,
              llvm::json::Path);
llvm::json::Value toJSON(const BreakpointModeApplicability &);

/// A `BreakpointMode` is provided as a option when setting breakpoints on
/// sources or instructions.
struct BreakpointMode {
  /// The internal ID of the mode. This value is passed to the `setBreakpoints`
  /// request.
  std::string mode;

  /// The name of the breakpoint mode. This is shown in the UI.
  std::string label;

  /// A help text providing additional information about the breakpoint mode.
  /// This string is typically shown as a hover and can be translated.
  std::optional<std::string> description;

  /// Describes one or more type of breakpoint this mode applies to.
  std::vector<BreakpointModeApplicability> appliesTo;
};
bool fromJSON(const llvm::json::Value &, BreakpointMode &, llvm::json::Path);
llvm::json::Value toJSON(const BreakpointMode &);

/// Debug Adapter Features flags supported by lldb-dap.
enum AdapterFeature : unsigned {
  /// The debug adapter supports ANSI escape sequences in styling of
  /// `OutputEvent.output` and `Variable.value` fields.
  eAdapterFeatureANSIStyling,
  /// The debug adapter supports the `breakpointLocations` request.
  eAdapterFeatureBreakpointLocationsRequest,
  /// The debug adapter supports the `cancel` request.
  eAdapterFeatureCancelRequest,
  /// The debug adapter supports the `clipboard` context value in the
  /// `evaluate` request.
  eAdapterFeatureClipboardContext,
  /// The debug adapter supports the `completions` request.
  eAdapterFeatureCompletionsRequest,
  /// The debug adapter supports conditional breakpoints.
  eAdapterFeatureConditionalBreakpoints,
  /// The debug adapter supports the `configurationDone` request.
  eAdapterFeatureConfigurationDoneRequest,
  /// The debug adapter supports the `asAddress` and `bytes` fields in the
  /// `dataBreakpointInfo` request.
  eAdapterFeatureDataBreakpointBytes,
  /// The debug adapter supports data breakpoints.
  eAdapterFeatureDataBreakpoints,
  /// The debug adapter supports the delayed loading of parts of the stack,
  /// which requires that both the `startFrame` and `levels` arguments and the
  /// `totalFrames` result of the `stackTrace` request are supported.
  eAdapterFeatureDelayedStackTraceLoading,
  /// The debug adapter supports the `disassemble` request.
  eAdapterFeatureDisassembleRequest,
  /// The debug adapter supports a (side effect free) `evaluate` request for
  /// data hovers.
  eAdapterFeatureEvaluateForHovers,
  /// The debug adapter supports `filterOptions` as an argument on the
  /// `setExceptionBreakpoints` request.
  eAdapterFeatureExceptionFilterOptions,
  /// The debug adapter supports the `exceptionInfo` request.
  eAdapterFeatureExceptionInfoRequest,
  /// The debug adapter supports `exceptionOptions` on the
  /// `setExceptionBreakpoints` request.
  eAdapterFeatureExceptionOptions,
  /// The debug adapter supports function breakpoints.
  eAdapterFeatureFunctionBreakpoints,
  /// The debug adapter supports the `gotoTargets` request.
  eAdapterFeatureGotoTargetsRequest,
  /// The debug adapter supports breakpoints that break execution after a
  /// specified number of hits.
  eAdapterFeatureHitConditionalBreakpoints,
  /// The debug adapter supports adding breakpoints based on instruction
  /// references.
  eAdapterFeatureInstructionBreakpoints,
  /// The debug adapter supports the `loadedSources` request.
  eAdapterFeatureLoadedSourcesRequest,
  /// The debug adapter supports log points by interpreting the `logMessage`
  /// attribute of the `SourceBreakpoint`.
  eAdapterFeatureLogPoints,
  /// The debug adapter supports the `modules` request.
  eAdapterFeatureModulesRequest,
  /// The debug adapter supports the `readMemory` request.
  eAdapterFeatureReadMemoryRequest,
  /// The debug adapter supports restarting a frame.
  eAdapterFeatureRestartFrame,
  /// The debug adapter supports the `restart` request. In this case a client
  /// should not implement `restart` by terminating and relaunching the
  /// adapter but by calling the `restart` request.
  eAdapterFeatureRestartRequest,
  /// The debug adapter supports the `setExpression` request.
  eAdapterFeatureSetExpression,
  /// The debug adapter supports setting a variable to a value.
  eAdapterFeatureSetVariable,
  /// The debug adapter supports the `singleThread` property on the execution
  /// requests (`continue`, `next`, `stepIn`, `stepOut`, `reverseContinue`,
  /// `stepBack`).
  eAdapterFeatureSingleThreadExecutionRequests,
  /// The debug adapter supports stepping back via the `stepBack` and
  /// `reverseContinue` requests.
  eAdapterFeatureStepBack,
  /// The debug adapter supports the `stepInTargets` request.
  eAdapterFeatureStepInTargetsRequest,
  /// The debug adapter supports stepping granularities (argument
  /// `granularity`) for the stepping requests.
  eAdapterFeatureSteppingGranularity,
  /// The debug adapter supports the `terminate` request.
  eAdapterFeatureTerminateRequest,
  /// The debug adapter supports the `terminateThreads` request.
  eAdapterFeatureTerminateThreadsRequest,
  /// The debug adapter supports the `suspendDebuggee` attribute on the
  /// `disconnect` request.
  eAdapterFeatureSuspendDebuggee,
  /// The debug adapter supports a `format` attribute on the `stackTrace`,
  /// `variables`, and `evaluate` requests.
  eAdapterFeatureValueFormattingOptions,
  /// The debug adapter supports the `writeMemory` request.
  eAdapterFeatureWriteMemoryRequest,
  /// The debug adapter supports the `terminateDebuggee` attribute on the
  /// `disconnect` request.
  eAdapterFeatureTerminateDebuggee,
  eAdapterFeatureFirst = eAdapterFeatureANSIStyling,
  eAdapterFeatureLast = eAdapterFeatureTerminateDebuggee,
};
bool fromJSON(const llvm::json::Value &, AdapterFeature &, llvm::json::Path);
llvm::json::Value toJSON(const AdapterFeature &);

/// Information about the capabilities of a debug adapter.
struct Capabilities {
  /// The supported features for this adapter.
  llvm::DenseSet<AdapterFeature> supportedFeatures;

  /// Available exception filter options for the `setExceptionBreakpoints`
  /// request.
  std::vector<ExceptionBreakpointsFilter> exceptionBreakpointFilters;

  /// The set of characters that should trigger completion in a REPL. If not
  /// specified, the UI should assume the `.` character.
  std::vector<std::string> completionTriggerCharacters;

  /// The set of additional module information exposed by the debug adapter.
  std::vector<ColumnDescriptor> additionalModuleColumns;

  /// Checksum algorithms supported by the debug adapter.
  std::vector<ChecksumAlgorithm> supportedChecksumAlgorithms;

  /// Modes of breakpoints supported by the debug adapter, such as 'hardware' or
  /// 'software'. If present, the client may allow the user to select a mode and
  /// include it in its `setBreakpoints` request.
  ///
  /// Clients may present the first applicable mode in this array as the
  /// 'default' mode in gestures that set breakpoints.
  std::vector<BreakpointMode> breakpointModes;

  /// lldb-dap Extensions
  /// @{

  /// The version of the adapter.
  std::string lldbExtVersion;

  /// @}
};
bool fromJSON(const llvm::json::Value &, Capabilities &, llvm::json::Path);
llvm::json::Value toJSON(const Capabilities &);

/// An `ExceptionFilterOptions` is used to specify an exception filter together
/// with a condition for the `setExceptionBreakpoints` request.
struct ExceptionFilterOptions {
  /// ID of an exception filter returned by the `exceptionBreakpointFilters`
  /// capability.
  std::string filterId;

  /// An expression for conditional exceptions.
  /// The exception breaks into the debugger if the result of the condition is
  /// true.
  std::string condition;

  /// The mode of this exception breakpoint. If defined, this must be one of the
  /// `breakpointModes` the debug adapter advertised in its `Capabilities`.
  std::string mode;
};
bool fromJSON(const llvm::json::Value &, ExceptionFilterOptions &,
              llvm::json::Path);
llvm::json::Value toJSON(const ExceptionFilterOptions &);

/// A `Source` is a descriptor for source code. It is returned from the debug
/// adapter as part of a `StackFrame` and it is used by clients when specifying
/// breakpoints.
struct Source {
  enum PresentationHint : unsigned {
    eSourcePresentationHintNormal,
    eSourcePresentationHintEmphasize,
    eSourcePresentationHintDeemphasize,
  };

  /// The short name of the source. Every source returned from the debug adapter
  /// has a name. When sending a source to the debug adapter this name is
  /// optional.
  std::optional<std::string> name;

  /// The path of the source to be shown in the UI. It is only used to locate
  /// and load the content of the source if no `sourceReference` is specified
  /// (or its value is 0).
  std::optional<std::string> path;

  /// If the value > 0 the contents of the source must be retrieved through the
  /// `source` request (even if a path is specified). Since a `sourceReference`
  /// is only valid for a session, it can not be used to persist a source. The
  /// value should be less than or equal to 2147483647 (2^31-1).
  std::optional<int32_t> sourceReference;

  /// A hint for how to present the source in the UI. A value of `deemphasize`
  /// can be used to indicate that the source is not available or that it is
  /// skipped on stepping.
  std::optional<PresentationHint> presentationHint;

  // unsupported keys: origin, sources, adapterData, checksums
};
bool fromJSON(const llvm::json::Value &, Source::PresentationHint &,
              llvm::json::Path);
llvm::json::Value toJSON(Source::PresentationHint);
bool fromJSON(const llvm::json::Value &, Source &, llvm::json::Path);
llvm::json::Value toJSON(const Source &);

/// A `Scope` is a named container for variables. Optionally a scope can map to
/// a source or a range within a source.
struct Scope {
  enum PresentationHint : unsigned {
    eScopePresentationHintArguments,
    eScopePresentationHintLocals,
    eScopePresentationHintRegisters,
    eScopePresentationHintReturnValue
  };
  /// Name of the scope such as 'Arguments', 'Locals', or 'Registers'. This
  /// string is shown in the UI as is and can be translated.
  ////
  std::string name;

  /// A hint for how to present this scope in the UI. If this attribute is
  /// missing, the scope is shown with a generic UI.
  /// Values:
  /// 'arguments': Scope contains method arguments.
  /// 'locals': Scope contains local variables.
  /// 'registers': Scope contains registers. Only a single `registers` scope
  /// should be returned from a `scopes` request.
  /// 'returnValue': Scope contains one or more return values.
  /// etc.
  std::optional<PresentationHint> presentationHint;

  /// The variables of this scope can be retrieved by passing the value of
  /// `variablesReference` to the `variables` request as long as execution
  /// remains suspended. See 'Lifetime of Object References' in the Overview
  /// section for details.
  ////
  uint64_t variablesReference = LLDB_DAP_INVALID_VARRERF;

  /// The number of named variables in this scope.
  /// The client can use this information to present the variables in a paged UI
  /// and fetch them in chunks.
  std::optional<uint64_t> namedVariables;

  /// The number of indexed variables in this scope.
  /// The client can use this information to present the variables in a paged UI
  /// and fetch them in chunks.
  std::optional<uint64_t> indexedVariables;

  /// The source for this scope.
  std::optional<Source> source;

  /// If true, the number of variables in this scope is large or expensive to
  /// retrieve.
  bool expensive = false;

  /// The start line of the range covered by this scope.
  std::optional<uint64_t> line;

  /// Start position of the range covered by the scope. It is measured in UTF-16
  /// code units and the client capability `columnsStartAt1` determines whether
  /// it is 0- or 1-based.
  std::optional<uint64_t> column;

  /// The end line of the range covered by this scope.
  std::optional<uint64_t> endLine;

  /// End position of the range covered by the scope. It is measured in UTF-16
  /// code units and the client capability `columnsStartAt1` determines whether
  /// it is 0- or 1-based.
  std::optional<uint64_t> endColumn;
};
bool fromJSON(const llvm::json::Value &Params, Scope::PresentationHint &PH,
              llvm::json::Path);
bool fromJSON(const llvm::json::Value &, Scope &, llvm::json::Path);
llvm::json::Value toJSON(const Scope &);

/// The granularity of one `step` in the stepping requests `next`, `stepIn`,
/// `stepOut` and `stepBack`.
enum SteppingGranularity : unsigned {
  /// The step should allow the program to run until the current statement has
  /// finished executing. The meaning of a statement is determined by the
  /// adapter and it may be considered equivalent to a line. For example
  /// `for(int i = 0; i < 10; i++)` could be considered to have 3 statements
  /// `int i = 0`, `i < 10`, and `i++`.
  eSteppingGranularityStatement,
  /// The step should allow the program to run until the current source line has
  /// executed.
  eSteppingGranularityLine,
  /// The step should allow one instruction to execute (e.g. one x86
  /// instruction).
  eSteppingGranularityInstruction,
};
bool fromJSON(const llvm::json::Value &, SteppingGranularity &,
              llvm::json::Path);
llvm::json::Value toJSON(const SteppingGranularity &);

/// A `StepInTarget` can be used in the `stepIn` request and determines into
/// which single target the `stepIn` request should step.
struct StepInTarget {
  /// Unique identifier for a step-in target.
  lldb::addr_t id = LLDB_INVALID_ADDRESS;

  /// The name of the step-in target (shown in the UI).
  std::string label;

  /// The line of the step-in target.
  uint32_t line = LLDB_INVALID_LINE_NUMBER;

  /// Start position of the range covered by the step in target. It is measured
  /// in UTF-16 code units and the client capability `columnsStartAt1`
  /// determines whether it is 0- or 1-based.
  uint32_t column = LLDB_INVALID_COLUMN_NUMBER;

  /// The end line of the range covered by the step-in target.
  uint32_t endLine = LLDB_INVALID_LINE_NUMBER;

  /// End position of the range covered by the step in target. It is measured in
  /// UTF-16 code units and the client capability `columnsStartAt1` determines
  /// whether it is 0- or 1-based.
  uint32_t endColumn = LLDB_INVALID_COLUMN_NUMBER;
};
bool fromJSON(const llvm::json::Value &, StepInTarget &, llvm::json::Path);
llvm::json::Value toJSON(const StepInTarget &);

/// A Thread.
struct Thread {
  /// Unique identifier for the thread.
  lldb::tid_t id = LLDB_INVALID_THREAD_ID;
  /// The name of the thread.
  std::string name;
};
bool fromJSON(const llvm::json::Value &, Thread &, llvm::json::Path);
llvm::json::Value toJSON(const Thread &);

/// Provides formatting information for a value.
struct ValueFormat {
  /// Display the value in hex.
  bool hex = false;
};
bool fromJSON(const llvm::json::Value &, ValueFormat &, llvm::json::Path);

/// Properties of a breakpoint location returned from the `breakpointLocations`
/// request.
struct BreakpointLocation {
  /// Start line of breakpoint location.
  uint32_t line;

  /// The start position of a breakpoint location. Position is measured in
  /// UTF-16 code units and the client capability `columnsStartAt1` determines
  /// whether it is 0- or 1-based.
  std::optional<uint32_t> column;

  /// The end line of breakpoint location if the location covers a range.
  std::optional<uint32_t> endLine;

  /// The end position of a breakpoint location (if the location covers a
  /// range). Position is measured in UTF-16 code units and the client
  /// capability `columnsStartAt1` determines whether it is 0- or 1-based.
  std::optional<uint32_t> endColumn;
};
llvm::json::Value toJSON(const BreakpointLocation &);

/// A machine-readable explanation of why a breakpoint may not be verified.
enum class BreakpointReason : unsigned {
  /// Indicates a breakpoint might be verified in the future, but
  /// the adapter cannot verify it in the current state.
  eBreakpointReasonPending,
  /// Indicates a breakpoint was not able to be verified, and the
  /// adapter does not believe it can be verified without intervention.
  eBreakpointReasonFailed,
};
bool fromJSON(const llvm::json::Value &, BreakpointReason &, llvm::json::Path);
llvm::json::Value toJSON(const BreakpointReason &);

/// Information about a breakpoint created in `setBreakpoints`,
/// `setFunctionBreakpoints`, `setInstructionBreakpoints`, or
/// `setDataBreakpoints` requests.
struct Breakpoint {
  /// The identifier for the breakpoint. It is needed if breakpoint events are
  /// used to update or remove breakpoints.
  std::optional<int> id;

  /// If true, the breakpoint could be set (but not necessarily at the desired
  /// location).
  bool verified = false;

  /// A message about the state of the breakpoint.
  /// This is shown to the user and can be used to explain why a breakpoint
  /// could not be verified.
  std::optional<std::string> message;

  /// The source where the breakpoint is located.
  std::optional<Source> source;

  /// The start line of the actual range covered by the breakpoint.
  std::optional<uint32_t> line;

  /// Start position of the source range covered by the breakpoint. It is
  /// measured in UTF-16 code units and the client capability `columnsStartAt1`
  /// determines whether it is 0- or 1-based.
  std::optional<uint32_t> column;

  /// The end line of the actual range covered by the breakpoint.
  std::optional<uint32_t> endLine;

  /// End position of the source range covered by the breakpoint. It is measured
  /// in UTF-16 code units and the client capability `columnsStartAt1`
  /// determines whether it is 0- or 1-based. If no end line is given, then the
  /// end column is assumed to be in the start line.
  std::optional<uint32_t> endColumn;

  /// A memory reference to where the breakpoint is set.
  std::optional<std::string> instructionReference;

  /// The offset from the instruction reference.
  /// This can be negative.
  std::optional<int32_t> offset;

  /// A machine-readable explanation of why a breakpoint may not be verified. If
  /// a breakpoint is verified or a specific reason is not known, the adapter
  /// should omit this property.
  std::optional<BreakpointReason> reason;
};
bool fromJSON(const llvm::json::Value &, Breakpoint &, llvm::json::Path);
llvm::json::Value toJSON(const Breakpoint &);

/// Properties of a breakpoint or logpoint passed to the `setBreakpoints`
/// request
struct SourceBreakpoint {
  /// The source line of the breakpoint or logpoint.
  uint32_t line = LLDB_INVALID_LINE_NUMBER;

  /// Start position within source line of the breakpoint or logpoint. It is
  /// measured in UTF-16 code units and the client capability `columnsStartAt1`
  /// determines whether it is 0- or 1-based.
  std::optional<uint32_t> column;

  /// The expression for conditional breakpoints.
  /// It is only honored by a debug adapter if the corresponding capability
  /// `supportsConditionalBreakpoints` is true.
  std::optional<std::string> condition;

  /// The expression that controls how many hits of the breakpoint are ignored.
  /// The debug adapter is expected to interpret the expression as needed.
  /// The attribute is only honored by a debug adapter if the corresponding
  /// capability `supportsHitConditionalBreakpoints` is true.
  /// If both this property and `condition` are specified, `hitCondition` should
  /// be evaluated only if the `condition` is met, and the debug adapter should
  /// stop only if both conditions are met.
  std::optional<std::string> hitCondition;

  /// If this attribute exists and is non-empty, the debug adapter must not
  /// 'break' (stop)
  /// but log the message instead. Expressions within `{}` are interpolated.
  /// The attribute is only honored by a debug adapter if the corresponding
  /// capability `supportsLogPoints` is true.
  /// If either `hitCondition` or `condition` is specified, then the message
  /// should only be logged if those conditions are met.
  std::optional<std::string> logMessage;

  /// The mode of this breakpoint. If defined, this must be one of the
  /// `breakpointModes` the debug adapter advertised in its `Capabilities`.
  std::optional<std::string> mode;
};
bool fromJSON(const llvm::json::Value &, SourceBreakpoint &, llvm::json::Path);
llvm::json::Value toJSON(const SourceBreakpoint &);

/// Properties of a breakpoint passed to the `setFunctionBreakpoints` request.
struct FunctionBreakpoint {
  /// The name of the function.
  std::string name;

  /// An expression for conditional breakpoints.
  /// It is only honored by a debug adapter if the corresponding capability
  /// `supportsConditionalBreakpoints` is true.
  std::optional<std::string> condition;

  /// An expression that controls how many hits of the breakpoint are ignored.
  /// The debug adapter is expected to interpret the expression as needed.
  /// The attribute is only honored by a debug adapter if the corresponding
  /// capability `supportsHitConditionalBreakpoints` is true.
  std::optional<std::string> hitCondition;
};
bool fromJSON(const llvm::json::Value &, FunctionBreakpoint &,
              llvm::json::Path);
llvm::json::Value toJSON(const FunctionBreakpoint &);

/// This enumeration defines all possible access types for data breakpoints.
/// Values: ‘read’, ‘write’, ‘readWrite’
enum DataBreakpointAccessType : unsigned {
  eDataBreakpointAccessTypeRead,
  eDataBreakpointAccessTypeWrite,
  eDataBreakpointAccessTypeReadWrite
};
bool fromJSON(const llvm::json::Value &, DataBreakpointAccessType &,
              llvm::json::Path);
llvm::json::Value toJSON(const DataBreakpointAccessType &);

/// Properties of a data breakpoint passed to the `setDataBreakpoints` request.
struct DataBreakpoint {
  /// An id representing the data. This id is returned from the
  /// `dataBreakpointInfo` request.
  std::string dataId;

  /// The access type of the data.
  std::optional<DataBreakpointAccessType> accessType;

  /// An expression for conditional breakpoints.
  std::optional<std::string> condition;

  /// An expression that controls how many hits of the breakpoint are ignored.
  /// The debug adapter is expected to interpret the expression as needed.
  std::optional<std::string> hitCondition;
};
bool fromJSON(const llvm::json::Value &, DataBreakpoint &, llvm::json::Path);
llvm::json::Value toJSON(const DataBreakpoint &);

/// Properties of a breakpoint passed to the `setInstructionBreakpoints` request
struct InstructionBreakpoint {
  /// The instruction reference of the breakpoint.
  /// This should be a memory or instruction pointer reference from an
  /// `EvaluateResponse`, `Variable`, `StackFrame`, `GotoTarget`, or
  /// `Breakpoint`.
  std::string instructionReference;

  /// The offset from the instruction reference in bytes.
  /// This can be negative.
  std::optional<int32_t> offset;

  /// An expression for conditional breakpoints.
  /// It is only honored by a debug adapter if the corresponding capability
  /// `supportsConditionalBreakpoints` is true.
  std::optional<std::string> condition;

  /// An expression that controls how many hits of the breakpoint are ignored.
  /// The debug adapter is expected to interpret the expression as needed.
  /// The attribute is only honored by a debug adapter if the corresponding
  /// capability `supportsHitConditionalBreakpoints` is true.
  std::optional<std::string> hitCondition;

  /// The mode of this breakpoint. If defined, this must be one of the
  /// `breakpointModes` the debug adapter advertised in its `Capabilities`.
  std::optional<std::string> mode;
};
bool fromJSON(const llvm::json::Value &, InstructionBreakpoint &,
              llvm::json::Path);

/// Properties of a single disassembled instruction, returned by `disassemble`
/// request.
struct DisassembledInstruction {
  enum PresentationHint : unsigned {
    eDisassembledInstructionPresentationHintNormal,
    eDisassembledInstructionPresentationHintInvalid,
  };

  /// The address of the instruction. Treated as a hex value if prefixed with
  /// `0x`, or as a decimal value otherwise.
  lldb::addr_t address = LLDB_INVALID_ADDRESS;

  /// Raw bytes representing the instruction and its operands, in an
  /// implementation-defined format.
  std::optional<std::string> instructionBytes;

  /// Text representing the instruction and its operands, in an
  /// implementation-defined format.
  std::string instruction;

  /// Name of the symbol that corresponds with the location of this instruction,
  /// if any.
  std::optional<std::string> symbol;

  /// Source location that corresponds to this instruction, if any.
  /// Should always be set (if available) on the first instruction returned,
  /// but can be omitted afterwards if this instruction maps to the same source
  /// file as the previous instruction.
  std::optional<protocol::Source> location;

  /// The line within the source location that corresponds to this instruction,
  /// if any.
  std::optional<uint32_t> line;

  /// The column within the line that corresponds to this instruction, if any.
  std::optional<uint32_t> column;

  /// The end line of the range that corresponds to this instruction, if any.
  std::optional<uint32_t> endLine;

  /// The end column of the range that corresponds to this instruction, if any.
  std::optional<uint32_t> endColumn;

  /// A hint for how to present the instruction in the UI.
  ///
  /// A value of `invalid` may be used to indicate this instruction is 'filler'
  /// and cannot be reached by the program. For example, unreadable memory
  /// addresses may be presented is 'invalid.'
  /// Values: 'normal', 'invalid'
  std::optional<PresentationHint> presentationHint;
};
bool fromJSON(const llvm::json::Value &,
              DisassembledInstruction::PresentationHint &, llvm::json::Path);
llvm::json::Value toJSON(const DisassembledInstruction::PresentationHint &);
bool fromJSON(const llvm::json::Value &, DisassembledInstruction &,
              llvm::json::Path);
llvm::json::Value toJSON(const DisassembledInstruction &);

struct Module {
  /// Unique identifier for the module.
  std::string id;

  /// A name of the module.
  std::string name;

  /// Logical full path to the module. The exact definition is implementation
  /// defined, but usually this would be a full path to the on-disk file for the
  /// module.
  std::string path;

  /// True if the module is optimized.
  bool isOptimized = false;

  /// True if the module is considered 'user code' by a debugger that supports
  /// 'Just My Code'.
  bool isUserCode = false;

  /// Version of Module.
  std::string version;

  /// User-understandable description of if symbols were found for the module
  /// (ex: 'Symbols Loaded', 'Symbols not found', etc.)
  std::string symbolStatus;

  /// Logical full path to the symbol file. The exact definition is
  /// implementation defined.
  std::string symbolFilePath;

  /// Module created or modified, encoded as an RFC 3339 timestamp.
  std::string dateTimeStamp;

  /// Address range covered by this module.
  std::string addressRange;

  /// Custom fields
  /// @{

  /// Size of the debug_info sections in the module in bytes.
  uint64_t debugInfoSizeBytes = 0;

  //// @}
};
llvm::json::Value toJSON(const Module &);

/// Properties of a variable that can be used to determine how to render the
/// variable in the UI.
struct VariablePresentationHint {
  /// The kind of variable. Before introducing additional values, try to use the
  /// listed values.
  std::string kind;

  /// Set of attributes represented as an array of strings. Before introducing
  /// additional values, try to use the listed values.
  std::vector<std::string> attributes;

  /// Visibility of variable. Before introducing additional values, try to use
  /// the listed values.
  std::string visibility;

  /// If true, clients can present the variable with a UI that supports a
  /// specific gesture to trigger its evaluation.
  ///
  /// This mechanism can be used for properties that require executing code when
  /// retrieving their value and where the code execution can be expensive
  /// and/or produce side-effects. A typical example are properties based on a
  /// getter function.
  ///
  /// Please note that in addition to the `lazy` flag, the variable's
  /// `variablesReference` is expected to refer to a variable that will provide
  /// the value through another `variable` request.
  bool lazy = false;
};
llvm::json::Value toJSON(const VariablePresentationHint &);
bool fromJSON(const llvm::json::Value &, VariablePresentationHint &,
              llvm::json::Path);

/// A Variable is a name/value pair.
///
/// The `type` attribute is shown if space permits or when hovering over the
/// variable's name.
///
/// The `kind` attribute is used to render additional properties of the
/// variable, e.g. different icons can be used to indicate that a variable is
/// public or private.
///
/// If the value is structured (has children), a handle is provided to retrieve
/// the children with the `variables` request.
///
/// If the number of named or indexed children is large, the numbers should be
/// returned via the `namedVariables` and `indexedVariables` attributes.
///
/// The client can use this information to present the children in a paged UI
/// and fetch them in chunks.
struct Variable {
  /// The variable's name.
  std::string name;

  /// The variable's value.
  ///
  /// This can be a multi-line text, e.g. for a function the body of a function.
  ///
  /// For structured variables (which do not have a simple value), it is
  /// recommended to provide a one-line representation of the structured object.
  /// This helps to identify the structured object in the collapsed state when
  /// its children are not yet visible.
  ///
  /// An empty string can be used if no value should be shown in the UI.
  std::string value;

  /// The type of the variable's value. Typically shown in the UI when hovering
  /// over the value.
  ///
  /// This attribute should only be returned by a debug adapter if the
  /// corresponding capability `supportsVariableType` is true.
  std::string type;

  /// Properties of a variable that can be used to determine how to render the
  /// variable in the UI.
  std::optional<VariablePresentationHint> presentationHint;

  /// The evaluatable name of this variable which can be passed to the
  /// `evaluate` request to fetch the variable's value.
  std::string evaluateName;

  /// If `variablesReference` is > 0, the variable is structured and its
  /// children can be retrieved by passing `variablesReference` to the
  /// `variables` request as long as execution remains suspended. See 'Lifetime
  /// of Object References' in the Overview section for details.
  uint64_t variablesReference = 0;

  /// The number of named child variables.
  ///
  /// The client can use this information to present the children in a paged UI
  /// and fetch them in chunks.
  uint64_t namedVariables = 0;

  /// The number of indexed child variables.
  ///
  /// The client can use this information to present the children in a paged UI
  /// and fetch them in chunks.
  uint64_t indexedVariables = 0;

  /// A memory reference associated with this variable.
  ///
  /// For pointer type variables, this is generally a reference to the memory
  /// address contained in the pointer.
  ///
  /// For executable data, this reference may later be used in a `disassemble`
  /// request.
  ///
  /// This attribute may be returned by a debug adapter if corresponding
  /// capability `supportsMemoryReferences` is true.
  lldb::addr_t memoryReference = LLDB_INVALID_ADDRESS;

  /// A reference that allows the client to request the location where the
  /// variable is declared. This should be present only if the adapter is likely
  /// to be able to resolve the location.
  ///
  /// This reference shares the same lifetime as the `variablesReference`. See
  /// 'Lifetime of Object References' in the Overview section for details.
  uint64_t declarationLocationReference = 0;

  /// A reference that allows the client to request the location where the
  /// variable's value is declared. For example, if the variable contains a
  /// function pointer, the adapter may be able to look up the function's
  /// location. This should be present only if the adapter is likely to be able
  /// to resolve the location.
  ///
  /// This reference shares the same lifetime as the `variablesReference`. See
  /// 'Lifetime of Object References' in the Overview section for details.
  uint64_t valueLocationReference = 0;
};
llvm::json::Value toJSON(const Variable &);
bool fromJSON(const llvm::json::Value &, Variable &, llvm::json::Path);

} // namespace lldb_dap::protocol

#endif
