/* This is a dummy line to alter the dbscheme, so we can make a database upgrade
 * without actually changing any of the dbscheme predicates. It contains a date
 * to allow for such updates in the future as well.
 *
 * 2021-07-14
 *
 * DO NOT remove this comment carelessly, since it can revert the dbscheme back to a
 * previously seen state (matching a previously seen SHA), which would make the upgrade
 * mechanism not work properly.
 */

/**
 * An invocation of the compiler. Note that more than one file may be
 * compiled per invocation. For example, this command compiles three
 * source files:
 *
 *   csc f1.cs f2.cs f3.cs
 *
 * The `id` simply identifies the invocation, while `cwd` is the working
 * directory from which the compiler was invoked.
 */
compilations(
    unique int id : @compilation,
    string cwd : string ref
);

/**
 * The arguments that were passed to the extractor for a compiler
 * invocation. If `id` is for the compiler invocation
 *
 *   csc f1.cs f2.cs f3.cs
 *
 * then typically there will be rows for
 *
 * num | arg
 * --- | ---
 * 0   | --compiler
 * 1   | *path to compiler*
 * 2   | --cil
 * 3   | f1.cs
 * 4   | f2.cs
 * 5   | f3.cs
 */
#keyset[id, num]
compilation_args(
    int id : @compilation ref,
    int num : int ref,
    string arg : string ref
);

/**
 * The source files that are compiled by a compiler invocation.
 * If `id` is for the compiler invocation
 *
 *   csc f1.cs f2.cs f3.cs
 *
 * then there will be rows for
 *
 * num | arg
 * --- | ---
 * 0   | f1.cs
 * 1   | f2.cs
 * 2   | f3.cs
 */
#keyset[id, num]
compilation_compiling_files(
    int id : @compilation ref,
    int num : int ref,
    int file : @file ref
);

/**
 * The references used by a compiler invocation.
 * If `id` is for the compiler invocation
 *
 *   csc f1.cs f2.cs f3.cs /r:ref1.dll /r:ref2.dll /r:ref3.dll
 *
 * then there will be rows for
 *
 * num | arg
 * --- | ---
 * 0   | ref1.dll
 * 1   | ref2.dll
 * 2   | ref3.dll
 */
#keyset[id, num]
compilation_referencing_files(
    int id : @compilation ref,
    int num : int ref,
    int file : @file ref
);

/**
 * The time taken by the extractor for a compiler invocation.
 *
 * For each file `num`, there will be rows for
 *
 * kind | seconds
 * ---- | ---
 * 1    | CPU seconds used by the extractor frontend
 * 2    | Elapsed seconds during the extractor frontend
 * 3    | CPU seconds used by the extractor backend
 * 4    | Elapsed seconds during the extractor backend
 */
#keyset[id, num, kind]
compilation_time(
    int id : @compilation ref,
    int num : int ref,
    /* kind:
       1 = frontend_cpu_seconds
       2 = frontend_elapsed_seconds
       3 = extractor_cpu_seconds
       4 = extractor_elapsed_seconds
    */
    int kind : int ref,
    float seconds : float ref
);

/**
 * An error or warning generated by the extractor.
 * The diagnostic message `diagnostic` was generated during compiler
 * invocation `compilation`, and is the `file_number_diagnostic_number`th
 * message generated while extracting the `file_number`th file of that
 * invocation.
 */
#keyset[compilation, file_number, file_number_diagnostic_number]
diagnostic_for(
    unique int diagnostic : @diagnostic ref,
    int compilation : @compilation ref,
    int file_number : int ref,
    int file_number_diagnostic_number : int ref
);

diagnostics(
    unique int id: @diagnostic,
    int severity: int ref,
    string error_tag: string ref,
    string error_message: string ref,
    string full_error_message: string ref,
    int location: @location_default ref
);

extractor_messages(
    unique int id: @extractor_message,
    int severity: int ref,
    string origin : string ref,
    string text : string ref,
    string entity : string ref,
    int location: @location_default ref,
    string stack_trace : string ref
);

/**
 * If extraction was successful, then `cpu_seconds` and
 * `elapsed_seconds` are the CPU time and elapsed time (respectively)
 * that extraction took for compiler invocation `id`.
 */
compilation_finished(
    unique int id : @compilation ref,
    float cpu_seconds : float ref,
    float elapsed_seconds : float ref
);

compilation_assembly(
  unique int id : @compilation ref,
  int assembly: @assembly ref
)

/*
 * External artifacts
 */

externalDefects(
  unique int id: @externalDefect,
  string queryPath: string ref,
  int location: @location ref,
  string message: string ref,
  float severity: float ref);

externalMetrics(
  unique int id: @externalMetric,
  string queryPath: string ref,
  int location: @location ref,
  float value: float ref);

externalData(
  int id: @externalDataElement,
  string path: string ref,
  int column: int ref,
  string value: string ref);

snapshotDate(
  unique date snapshotDate: date ref);

sourceLocationPrefix(
  string prefix: string ref);

/*
 * Duplicate code
 */

duplicateCode(
  unique int id: @duplication,
  string relativePath: string ref,
  int equivClass: int ref);

similarCode(
  unique int id: @similarity,
  string relativePath: string ref,
  int equivClass: int ref);

@duplication_or_similarity = @duplication | @similarity

tokens(
  int id: @duplication_or_similarity ref,
  int offset: int ref,
  int beginLine: int ref,
  int beginColumn: int ref,
  int endLine: int ref,
  int endColumn: int ref);

/*
 * C# dbscheme
 */

/** ELEMENTS **/

@element = @declaration | @stmt | @expr | @modifier | @attribute | @namespace_declaration
         | @using_directive | @type_parameter_constraints | @external_element
         | @xmllocatable | @asp_element | @namespace | @preprocessor_directive;

@declaration = @callable | @generic | @assignable | @namespace;

@named_element = @namespace | @declaration;

@declaration_with_accessors = @property | @indexer | @event;

@assignable = @variable | @assignable_with_accessors | @event;

@assignable_with_accessors = @property | @indexer;

@external_element = @externalMetric | @externalDefect | @externalDataElement;

@attributable = @assembly | @field | @parameter | @operator | @method | @constructor
              | @destructor | @callable_accessor | @value_or_ref_type | @declaration_with_accessors
              | @local_function;

/** LOCATIONS, ASEMMBLIES, MODULES, FILES and FOLDERS **/

@location = @location_default | @assembly;

locations_default(
  unique int id: @location_default,
  int file: @file ref,
  int beginLine: int ref,
  int beginColumn: int ref,
  int endLine: int ref,
  int endColumn: int ref);

locations_mapped(
  unique int id: @location_default ref,
  int mapped_to: @location_default ref);

@sourceline = @file | @callable | @xmllocatable;

numlines(
  int element_id: @sourceline ref,
  int num_lines: int ref,
  int num_code: int ref,
  int num_comment: int ref);

assemblies(
  unique int id: @assembly,
  int file: @file ref,
  string fullname: string ref,
  string name: string ref,
  string version: string ref);

files(
  unique int id: @file,
  string name: string ref);

folders(
  unique int id: @folder,
  string name: string ref);

@container = @folder | @file ;

containerparent(
  int parent: @container ref,
  unique int child: @container ref);

file_extraction_mode(
  unique int file: @file ref,
  int mode: int ref
  /* 0 = normal, 1 = standalone extractor */
  );

/** NAMESPACES **/

@type_container = @namespace | @type;

namespaces(
  unique int id: @namespace,
  string name: string ref);

namespace_declarations(
  unique int id: @namespace_declaration,
  int namespace_id: @namespace ref);

namespace_declaration_location(
  unique int id: @namespace_declaration ref,
  int loc: @location ref);

parent_namespace(
  unique int child_id: @type_container ref,
  int namespace_id: @namespace ref);

@declaration_or_directive = @namespace_declaration | @type | @using_directive;

parent_namespace_declaration(
  int child_id: @declaration_or_directive ref, // cannot be unique because of partial classes
  int namespace_id: @namespace_declaration ref);

@using_directive = @using_namespace_directive | @using_static_directive;

using_global(
  unique int id: @using_directive ref
);

using_namespace_directives(
  unique int id: @using_namespace_directive,
  int namespace_id: @namespace ref);

using_static_directives(
  unique int id: @using_static_directive,
  int type_id: @type_or_ref ref);

using_directive_location(
  unique int id: @using_directive ref,
  int loc: @location ref);

@preprocessor_directive = @pragma_warning | @pragma_checksum | @directive_define | @directive_undefine | @directive_warning
  | @directive_error | @directive_nullable | @directive_line | @directive_region | @directive_endregion | @directive_if
  | @directive_elif | @directive_else | @directive_endif;

@conditional_directive = @directive_if | @directive_elif;
@branch_directive = @directive_if | @directive_elif | @directive_else;

directive_ifs(
  unique int id: @directive_if,
  int branchTaken: int ref,     /* 0: false, 1: true */
  int conditionValue: int ref); /* 0: false, 1: true */

directive_elifs(
  unique int id: @directive_elif,
  int branchTaken: int ref,     /* 0: false, 1: true */
  int conditionValue: int ref,  /* 0: false, 1: true */
  int parent: @directive_if ref,
  int index: int ref);

directive_elses(
  unique int id: @directive_else,
  int branchTaken: int ref,   /* 0: false, 1: true */
  int parent: @directive_if ref,
  int index: int ref);

#keyset[id, start]
directive_endifs(
  unique int id: @directive_endif,
  unique int start: @directive_if ref);

directive_define_symbols(
  unique int id: @define_symbol_expr ref,
  string name: string ref);

directive_regions(
  unique int id: @directive_region,
  string name: string ref);

#keyset[id, start]
directive_endregions(
  unique int id: @directive_endregion,
  unique int start: @directive_region ref);

directive_lines(
  unique int id: @directive_line,
  int kind: int ref); /* 0: default, 1: hidden, 2: numeric, 3: span */

directive_line_value(
  unique int id: @directive_line ref,
  int line: int ref);

directive_line_file(
  unique int id: @directive_line ref,
  int file: @file ref);

directive_line_offset(
  unique int id: @directive_line ref,
  int offset: int ref);

directive_line_span(
  unique int id: @directive_line ref,
  int startLine: int ref,
  int startColumn: int ref,
  int endLine: int ref,
  int endColumn: int ref);

directive_nullables(
  unique int id: @directive_nullable,
  int setting: int ref, /* 0: disable, 1: enable, 2: restore */
  int target: int ref); /* 0: none, 1: annotations, 2: warnings */

directive_warnings(
  unique int id: @directive_warning,
  string message: string ref);

directive_errors(
  unique int id: @directive_error,
  string message: string ref);

directive_undefines(
  unique int id: @directive_undefine,
  string name: string ref);

directive_defines(
  unique int id: @directive_define,
  string name: string ref);

pragma_checksums(
  unique int id: @pragma_checksum,
  int file: @file ref,
  string guid: string ref,
  string bytes: string ref);

pragma_warnings(
  unique int id: @pragma_warning,
  int kind: int ref /* 0 = disable, 1 = restore */);

#keyset[id, index]
pragma_warning_error_codes(
  int id: @pragma_warning ref,
  string errorCode: string ref,
  int index: int ref);

preprocessor_directive_location(
  unique int id: @preprocessor_directive ref,
  int loc: @location ref);

preprocessor_directive_compilation(
  unique int id: @preprocessor_directive ref,
  int compilation: @compilation ref);

preprocessor_directive_active(
  unique int id: @preprocessor_directive ref,
  int active: int ref);  /* 0: false, 1: true */

/** TYPES **/

types(
  unique int id: @type,
  int kind: int ref,
  string name: string ref);

case @type.kind of
   1 = @bool_type
|  2 = @char_type
|  3 = @decimal_type
|  4 = @sbyte_type
|  5 = @short_type
|  6 = @int_type
|  7 = @long_type
|  8 = @byte_type
|  9 = @ushort_type
| 10 = @uint_type
| 11 = @ulong_type
| 12 = @float_type
| 13 = @double_type
| 14 = @enum_type
| 15 = @struct_type
| 17 = @class_type
| 19 = @interface_type
| 20 = @delegate_type
| 21 = @null_type
| 22 = @type_parameter
| 23 = @pointer_type
| 24 = @nullable_type
| 25 = @array_type
| 26 = @void_type
| 27 = @int_ptr_type
| 28 = @uint_ptr_type
| 29 = @dynamic_type
| 30 = @arglist_type
| 31 = @unknown_type
| 32 = @tuple_type
| 33 = @function_pointer_type
  ;

@simple_type = @bool_type | @char_type | @integral_type | @floating_point_type | @decimal_type;
@integral_type = @signed_integral_type | @unsigned_integral_type;
@signed_integral_type = @sbyte_type | @short_type | @int_type | @long_type;
@unsigned_integral_type = @byte_type  | @ushort_type | @uint_type | @ulong_type;
@floating_point_type = @float_type | @double_type;
@value_type = @simple_type | @enum_type | @struct_type | @nullable_type | @int_ptr_type
            | @uint_ptr_type | @tuple_type;
@ref_type = @class_type | @interface_type | @array_type | @delegate_type | @null_type
          | @dynamic_type;
@value_or_ref_type = @value_type | @ref_type;

typerefs(
  unique int id: @typeref,
  string name: string ref);

typeref_type(
  int id: @typeref ref,
  unique int typeId: @type ref);

@type_or_ref = @type | @typeref;

array_element_type(
  unique int array: @array_type ref,
  int dimension: int ref,
  int rank: int ref,
  int element: @type_or_ref ref);

nullable_underlying_type(
  unique int nullable: @nullable_type ref,
  int underlying: @type_or_ref ref);

pointer_referent_type(
  unique int pointer: @pointer_type ref,
  int referent: @type_or_ref ref);

enum_underlying_type(
  unique int enum_id: @enum_type ref,
  int underlying_type_id: @type_or_ref ref);

delegate_return_type(
  unique int delegate_id: @delegate_type ref,
  int return_type_id: @type_or_ref ref);

function_pointer_return_type(
    unique int function_pointer_id: @function_pointer_type ref,
    int return_type_id: @type_or_ref ref);

extend(
  int sub: @type ref,
  int super: @type_or_ref ref);

anonymous_types(
  unique int id: @type ref);

@interface_or_ref = @interface_type | @typeref;

implement(
  int sub: @type ref,
  int super: @type_or_ref ref);

type_location(
  int id: @type ref,
  int loc: @location ref);

tuple_underlying_type(
  unique int tuple: @tuple_type ref,
  int struct: @type_or_ref ref);

#keyset[tuple, index]
tuple_element(
  int tuple: @tuple_type ref,
  int index: int ref,
  unique int field: @field ref);

attributes(
  unique int id: @attribute,
  int type_id: @type_or_ref ref,
  int target:  @attributable ref);

attribute_location(
  int id: @attribute ref,
  int loc: @location ref);

@type_mention_parent = @element | @type_mention;

type_mention(
  unique int id: @type_mention,
  int type_id: @type_or_ref ref,
  int parent: @type_mention_parent ref);

type_mention_location(
  unique int id: @type_mention ref,
  int loc: @location ref);

@has_type_annotation = @assignable | @type_parameter | @callable | @expr | @delegate_type | @generic | @function_pointer_type;

/**
 * A direct annotation on an entity, for example `string? x;`.
 *
 * Annotations:
 * 2 = reftype is not annotated "!"
 * 3 = reftype is annotated "?"
 * 4 = readonly ref type / in parameter
 * 5 = ref type parameter, return or local variable
 * 6 = out parameter
 *
 * Note that the annotation depends on the element it annotates.
 * @assignable: The annotation is on the type of the assignable, for example the variable type.
 * @type_parameter: The annotation is on the reftype constraint
 * @callable: The annotation is on the return type
 * @array_type: The annotation is on the element type
 */
type_annotation(int id: @has_type_annotation ref, int annotation: int ref);

nullability(unique int nullability: @nullability, int kind: int ref);

case @nullability.kind of
  0 = @oblivious
| 1 = @not_annotated
| 2 = @annotated
;

#keyset[parent, index]
nullability_parent(int nullability: @nullability ref, int index: int ref, int parent: @nullability ref)

type_nullability(int id: @has_type_annotation ref, int nullability: @nullability ref);

/**
 * The nullable flow state of an expression, as determined by Roslyn.
 *   0 = none (default, not populated)
 *   1 = not null
 *   2 = maybe null
 */
expr_flowstate(unique int id: @expr ref, int state: int ref);

/** GENERICS **/

@generic = @type | @method | @local_function;

type_parameters(
  unique int id: @type_parameter ref,
  int index: int ref,
  int generic_id: @generic ref,
  int variance: int ref /* none = 0, out = 1, in = 2 */);

#keyset[constructed_id, index]
type_arguments(
  int id: @type_or_ref ref,
  int index: int ref,
  int constructed_id: @generic_or_ref ref);

@generic_or_ref = @generic | @typeref;

constructed_generic(
  unique int constructed: @generic ref,
  int generic: @generic_or_ref ref);

type_parameter_constraints(
  unique int id: @type_parameter_constraints,
  int param_id: @type_parameter ref);

type_parameter_constraints_location(
  int id: @type_parameter_constraints ref,
  int loc: @location ref);

general_type_parameter_constraints(
  int id: @type_parameter_constraints ref,
  int kind: int ref /* class = 1, struct = 2, new = 3 */);

specific_type_parameter_constraints(
  int id: @type_parameter_constraints ref,
  int base_id: @type_or_ref ref);

specific_type_parameter_nullability(
  int id: @type_parameter_constraints ref,
  int base_id: @type_or_ref ref,
  int nullability: @nullability ref);

/** FUNCTION POINTERS */

function_pointer_calling_conventions(
  int id: @function_pointer_type ref,
  int kind: int ref);

#keyset[id, index]
has_unmanaged_calling_conventions(
  int id: @function_pointer_type ref,
  int index: int ref,
  int conv_id: @type_or_ref ref);

/** MODIFIERS */

@modifiable = @modifiable_direct | @event_accessor;

@modifiable_direct = @member | @accessor | @local_function | @anonymous_function_expr;

modifiers(
  unique int id: @modifier,
  string name: string ref);

has_modifiers(
  int id: @modifiable_direct ref,
  int mod_id: @modifier ref);

compiler_generated(unique int id: @modifiable_direct ref);

/** MEMBERS **/

@member = @method | @constructor | @destructor | @field | @property | @event | @operator | @indexer | @type;

@named_exprorstmt = @goto_stmt | @labeled_stmt | @expr;

@virtualizable = @method | @property | @indexer | @event;

exprorstmt_name(
  unique int parent_id: @named_exprorstmt ref,
  string name: string ref);

nested_types(
  unique int id: @type ref,
  int declaring_type_id: @type ref,
  int unbound_id: @type ref);

properties(
  unique int id: @property,
  string name: string ref,
  int declaring_type_id: @type ref,
  int type_id: @type_or_ref ref,
  int unbound_id: @property ref);

property_location(
  int id: @property ref,
  int loc: @location ref);

indexers(
  unique int id: @indexer,
  string name: string ref,
  int declaring_type_id: @type ref,
  int type_id: @type_or_ref ref,
  int unbound_id: @indexer ref);

indexer_location(
  int id: @indexer ref,
  int loc: @location ref);

accessors(
  unique int id: @accessor,
  int kind: int ref,
  string name: string ref,
  int declaring_member_id: @member ref,
  int unbound_id: @accessor ref);

case @accessor.kind of
  1 = @getter
| 2 = @setter
  ;

init_only_accessors(
  unique int id: @accessor ref);

accessor_location(
  int id: @accessor ref,
  int loc: @location ref);

events(
  unique int id: @event,
  string name: string ref,
  int declaring_type_id: @type ref,
  int type_id: @type_or_ref ref,
  int unbound_id: @event ref);

event_location(
  int id: @event ref,
  int loc: @location ref);

event_accessors(
  unique int id: @event_accessor,
  int kind: int ref,
  string name: string ref,
  int declaring_event_id: @event ref,
  int unbound_id: @event_accessor ref);

case @event_accessor.kind of
  1 = @add_event_accessor
| 2 = @remove_event_accessor
  ;

event_accessor_location(
  int id: @event_accessor ref,
  int loc: @location ref);

operators(
  unique int id: @operator,
  string name: string ref,
  string symbol: string ref,
  int declaring_type_id: @type ref,
  int type_id: @type_or_ref ref,
  int unbound_id: @operator ref);

operator_location(
  int id: @operator ref,
  int loc: @location ref);

constant_value(
  int id: @variable ref,
  string value: string ref);

/** CALLABLES **/

@callable = @method | @constructor | @destructor | @operator | @callable_accessor | @anonymous_function_expr | @local_function;

@callable_accessor = @accessor | @event_accessor;

methods(
  unique int id: @method,
  string name: string ref,
  int declaring_type_id: @type ref,
  int type_id: @type_or_ref ref,
  int unbound_id: @method ref);

method_location(
  int id: @method ref,
  int loc: @location ref);

constructors(
  unique int id: @constructor,
  string name: string ref,
  int declaring_type_id: @type ref,
  int unbound_id: @constructor ref);

constructor_location(
  int id: @constructor ref,
  int loc: @location ref);

destructors(
  unique int id: @destructor,
  string name: string ref,
  int declaring_type_id: @type ref,
  int unbound_id: @destructor ref);

destructor_location(
  int id: @destructor ref,
  int loc: @location ref);

overrides(
  int id: @callable ref,
  int base_id: @callable ref);

explicitly_implements(
  int id: @member ref,
  int interface_id: @interface_or_ref ref);

local_functions(
    unique int id: @local_function,
    string name: string ref,
    int return_type: @type ref,
    int unbound_id: @local_function ref);

local_function_stmts(
    unique int fn: @local_function_stmt ref,
    int stmt: @local_function ref);

/** VARIABLES **/

@variable = @local_scope_variable | @field;

@local_scope_variable = @local_variable | @parameter;

fields(
  unique int id: @field,
  int kind: int ref,
  string name: string ref,
  int declaring_type_id: @type ref,
  int type_id: @type_or_ref ref,
  int unbound_id: @field ref);

case @field.kind of
  1 = @addressable_field
| 2 = @constant
  ;

field_location(
  int id: @field ref,
  int loc: @location ref);

localvars(
  unique int id: @local_variable,
  int kind: int ref,
  string name: string ref,
  int implicitly_typed: int ref /* 0 = no, 1 = yes */,
  int type_id: @type_or_ref ref,
  int parent_id: @local_var_decl_expr ref);

case @local_variable.kind of
  1 = @addressable_local_variable
| 2 = @local_constant
| 3 = @local_variable_ref
  ;

localvar_location(
  unique int id: @local_variable ref,
  int loc: @location ref);

@parameterizable = @callable | @delegate_type | @indexer | @function_pointer_type;

#keyset[name, parent_id]
#keyset[index, parent_id]
params(
  unique int id: @parameter,
  string name: string ref,
  int type_id: @type_or_ref ref,
  int index: int ref,
  int mode: int ref, /* value = 0, ref = 1, out = 2, array = 3, this = 4 */
  int parent_id: @parameterizable ref,
  int unbound_id: @parameter ref);

param_location(
  int id: @parameter ref,
  int loc: @location ref);

/** STATEMENTS **/

@exprorstmt_parent = @control_flow_element | @top_level_exprorstmt_parent;

statements(
  unique int id: @stmt,
  int kind: int ref);

#keyset[index, parent]
stmt_parent(
  unique int stmt: @stmt ref,
  int index: int ref,
  int parent: @control_flow_element ref);

@top_level_stmt_parent = @callable;

// [index, parent] is not a keyset because the same parent may be compiled multiple times
stmt_parent_top_level(
  unique int stmt: @stmt ref,
  int index: int ref,
  int parent: @top_level_stmt_parent ref);

case @stmt.kind of
   1 = @block_stmt
|  2 = @expr_stmt
|  3 = @if_stmt
|  4 = @switch_stmt
|  5 = @while_stmt
|  6 = @do_stmt
|  7 = @for_stmt
|  8 = @foreach_stmt
|  9 = @break_stmt
| 10 = @continue_stmt
| 11 = @goto_stmt
| 12 = @goto_case_stmt
| 13 = @goto_default_stmt
| 14 = @throw_stmt
| 15 = @return_stmt
| 16 = @yield_stmt
| 17 = @try_stmt
| 18 = @checked_stmt
| 19 = @unchecked_stmt
| 20 = @lock_stmt
| 21 = @using_block_stmt
| 22 = @var_decl_stmt
| 23 = @const_decl_stmt
| 24 = @empty_stmt
| 25 = @unsafe_stmt
| 26 = @fixed_stmt
| 27 = @label_stmt
| 28 = @catch
| 29 = @case_stmt
| 30 = @local_function_stmt
| 31 = @using_decl_stmt
  ;

@using_stmt = @using_block_stmt | @using_decl_stmt;

@labeled_stmt = @label_stmt | @case;

@decl_stmt = @var_decl_stmt | @const_decl_stmt | @using_decl_stmt;

@cond_stmt = @if_stmt | @switch_stmt;

@loop_stmt = @while_stmt | @do_stmt | @for_stmt | @foreach_stmt;

@jump_stmt = @break_stmt | @goto_any_stmt | @continue_stmt | @throw_stmt | @return_stmt
           | @yield_stmt;

@goto_any_stmt = @goto_default_stmt | @goto_case_stmt | @goto_stmt;


stmt_location(
  unique int id: @stmt ref,
  int loc: @location ref);

catch_type(
  unique int catch_id: @catch ref,
  int type_id: @type_or_ref ref,
  int kind: int ref /* explicit = 1, implicit = 2 */);

foreach_stmt_info(
  unique int id: @foreach_stmt ref,
  int kind: int ref /* non-async = 1, async = 2 */);

@foreach_symbol =  @method | @property | @type_or_ref;

#keyset[id, kind]
foreach_stmt_desugar(
  int id: @foreach_stmt ref,
  int symbol: @foreach_symbol ref,
  int kind: int ref /* GetEnumeratorMethod = 1, CurrentProperty = 2, MoveNextMethod = 3, DisposeMethod = 4, ElementType = 5 */);

/** EXPRESSIONS **/

expressions(
  unique int id: @expr,
  int kind: int ref,
  int type_id: @type_or_ref ref);

#keyset[index, parent]
expr_parent(
  unique int expr: @expr ref,
  int index: int ref,
  int parent: @control_flow_element ref);

@top_level_expr_parent = @attribute | @field | @property | @indexer | @parameter | @directive_if | @directive_elif;

@top_level_exprorstmt_parent = @top_level_expr_parent | @top_level_stmt_parent;

// [index, parent] is not a keyset because the same parent may be compiled multiple times
expr_parent_top_level(
  unique int expr: @expr ref,
  int index: int ref,
  int parent: @top_level_exprorstmt_parent ref);

case @expr.kind of
/* literal */
   1 = @bool_literal_expr
|  2 = @char_literal_expr
|  3 = @decimal_literal_expr
|  4 = @int_literal_expr
|  5 = @long_literal_expr
|  6 = @uint_literal_expr
|  7 = @ulong_literal_expr
|  8 = @float_literal_expr
|  9 = @double_literal_expr
| 10 = @string_literal_expr
| 11 = @null_literal_expr
/* primary & unary */
| 12 = @this_access_expr
| 13 = @base_access_expr
| 14 = @local_variable_access_expr
| 15 = @parameter_access_expr
| 16 = @field_access_expr
| 17 = @property_access_expr
| 18 = @method_access_expr
| 19 = @event_access_expr
| 20 = @indexer_access_expr
| 21 = @array_access_expr
| 22 = @type_access_expr
| 23 = @typeof_expr
| 24 = @method_invocation_expr
| 25 = @delegate_invocation_expr
| 26 = @operator_invocation_expr
| 27 = @cast_expr
| 28 = @object_creation_expr
| 29 = @explicit_delegate_creation_expr
| 30 = @implicit_delegate_creation_expr
| 31 = @array_creation_expr
| 32 = @default_expr
| 33 = @plus_expr
| 34 = @minus_expr
| 35 = @bit_not_expr
| 36 = @log_not_expr
| 37 = @post_incr_expr
| 38 = @post_decr_expr
| 39 = @pre_incr_expr
| 40 = @pre_decr_expr
/* multiplicative */
| 41 = @mul_expr
| 42 = @div_expr
| 43 = @rem_expr
/* additive */
| 44 = @add_expr
| 45 = @sub_expr
/* shift */
| 46 = @lshift_expr
| 47 = @rshift_expr
/* relational */
| 48 = @lt_expr
| 49 = @gt_expr
| 50 = @le_expr
| 51 = @ge_expr
/* equality */
| 52 = @eq_expr
| 53 = @ne_expr
/* logical */
| 54 = @bit_and_expr
| 55 = @bit_xor_expr
| 56 = @bit_or_expr
| 57 = @log_and_expr
| 58 = @log_or_expr
/* type testing */
| 59 = @is_expr
| 60 = @as_expr
/* null coalescing */
| 61 = @null_coalescing_expr
/* conditional */
| 62 = @conditional_expr
/* assignment */
| 63 = @simple_assign_expr
| 64 = @assign_add_expr
| 65 = @assign_sub_expr
| 66 = @assign_mul_expr
| 67 = @assign_div_expr
| 68 = @assign_rem_expr
| 69 = @assign_and_expr
| 70 = @assign_xor_expr
| 71 = @assign_or_expr
| 72 = @assign_lshift_expr
| 73 = @assign_rshift_expr
/* more */
| 74 = @object_init_expr
| 75 = @collection_init_expr
| 76 = @array_init_expr
| 77 = @checked_expr
| 78 = @unchecked_expr
| 79 = @constructor_init_expr
| 80 = @add_event_expr
| 81 = @remove_event_expr
| 82 = @par_expr
| 83 = @local_var_decl_expr
| 84 = @lambda_expr
| 85 = @anonymous_method_expr
| 86 = @namespace_expr
/* dynamic */
| 92 = @dynamic_element_access_expr
| 93 = @dynamic_member_access_expr
/* unsafe */
| 100 = @pointer_indirection_expr
| 101 = @address_of_expr
| 102 = @sizeof_expr
/* async */
| 103 = @await_expr
/* C# 6.0 */
| 104 = @nameof_expr
| 105 = @interpolated_string_expr
| 106 = @unknown_expr
/* C# 7.0 */
| 107 = @throw_expr
| 108 = @tuple_expr
| 109 = @local_function_invocation_expr
| 110 = @ref_expr
| 111 = @discard_expr
/* C# 8.0 */
| 112 = @range_expr
| 113 = @index_expr
| 114 = @switch_expr
| 115 = @recursive_pattern_expr
| 116 = @property_pattern_expr
| 117 = @positional_pattern_expr
| 118 = @switch_case_expr
| 119 = @assign_coalesce_expr
| 120 = @suppress_nullable_warning_expr
| 121 = @namespace_access_expr
/* C# 9.0 */
| 122 = @lt_pattern_expr
| 123 = @gt_pattern_expr
| 124 = @le_pattern_expr
| 125 = @ge_pattern_expr
| 126 = @not_pattern_expr
| 127 = @and_pattern_expr
| 128 = @or_pattern_expr
| 129 = @function_pointer_invocation_expr
| 130 = @with_expr
/* Preprocessor */
| 999 = @define_symbol_expr
;

@switch = @switch_stmt | @switch_expr;
@case = @case_stmt | @switch_case_expr;
@pattern_match = @case | @is_expr;
@unary_pattern_expr = @not_pattern_expr;
@relational_pattern_expr = @gt_pattern_expr | @lt_pattern_expr | @ge_pattern_expr | @le_pattern_expr;
@binary_pattern_expr = @and_pattern_expr | @or_pattern_expr;

@integer_literal_expr = @int_literal_expr | @long_literal_expr | @uint_literal_expr | @ulong_literal_expr;
@real_literal_expr = @float_literal_expr | @double_literal_expr | @decimal_literal_expr;
@literal_expr = @bool_literal_expr | @char_literal_expr | @integer_literal_expr | @real_literal_expr
              | @string_literal_expr | @null_literal_expr;

@assign_expr = @simple_assign_expr | @assign_op_expr | @local_var_decl_expr;
@assign_op_expr =  @assign_arith_expr | @assign_bitwise_expr | @assign_event_expr | @assign_coalesce_expr;
@assign_event_expr = @add_event_expr | @remove_event_expr;

@assign_arith_expr = @assign_add_expr | @assign_sub_expr | @assign_mul_expr | @assign_div_expr
                   | @assign_rem_expr
@assign_bitwise_expr = @assign_and_expr | @assign_or_expr | @assign_xor_expr
                   | @assign_lshift_expr | @assign_rshift_expr;

@member_access_expr = @field_access_expr | @property_access_expr | @indexer_access_expr | @event_access_expr
                    | @method_access_expr | @type_access_expr | @dynamic_member_access_expr;
@access_expr = @member_access_expr | @this_access_expr | @base_access_expr | @assignable_access_expr | @namespace_access_expr;
@element_access_expr = @indexer_access_expr | @array_access_expr | @dynamic_element_access_expr;

@local_variable_access = @local_variable_access_expr | @local_var_decl_expr;
@local_scope_variable_access_expr = @parameter_access_expr | @local_variable_access;
@variable_access_expr = @local_scope_variable_access_expr | @field_access_expr;

@assignable_access_expr = @variable_access_expr | @property_access_expr | @element_access_expr
                        | @event_access_expr | @dynamic_member_access_expr;

@objectorcollection_init_expr = @object_init_expr | @collection_init_expr;

@delegate_creation_expr = @explicit_delegate_creation_expr | @implicit_delegate_creation_expr;

@bin_arith_op_expr = @mul_expr | @div_expr | @rem_expr | @add_expr | @sub_expr;
@incr_op_expr =  @pre_incr_expr | @post_incr_expr;
@decr_op_expr =  @pre_decr_expr | @post_decr_expr;
@mut_op_expr = @incr_op_expr | @decr_op_expr;
@un_arith_op_expr = @plus_expr | @minus_expr | @mut_op_expr;
@arith_op_expr = @bin_arith_op_expr | @un_arith_op_expr;

@ternary_log_op_expr = @conditional_expr;
@bin_log_op_expr = @log_and_expr | @log_or_expr | @null_coalescing_expr;
@un_log_op_expr = @log_not_expr;
@log_expr = @un_log_op_expr | @bin_log_op_expr | @ternary_log_op_expr;

@bin_bit_op_expr =  @bit_and_expr | @bit_or_expr | @bit_xor_expr | @lshift_expr
                 | @rshift_expr;
@un_bit_op_expr = @bit_not_expr;
@bit_expr = @un_bit_op_expr | @bin_bit_op_expr;

@equality_op_expr =  @eq_expr | @ne_expr;
@rel_op_expr = @gt_expr | @lt_expr| @ge_expr | @le_expr;
@comp_expr = @equality_op_expr | @rel_op_expr;

@op_expr = @assign_expr | @un_op | @bin_op | @ternary_op;

@ternary_op = @ternary_log_op_expr;
@bin_op = @bin_arith_op_expr | @bin_log_op_expr | @bin_bit_op_expr | @comp_expr;
@un_op = @un_arith_op_expr | @un_log_op_expr | @un_bit_op_expr | @sizeof_expr
       | @pointer_indirection_expr | @address_of_expr;

@anonymous_function_expr = @lambda_expr | @anonymous_method_expr;

@call = @method_invocation_expr | @constructor_init_expr | @operator_invocation_expr
      | @delegate_invocation_expr | @object_creation_expr | @call_access_expr
      | @local_function_invocation_expr | @function_pointer_invocation_expr;

@call_access_expr = @property_access_expr | @event_access_expr | @indexer_access_expr;

@late_bindable_expr = @dynamic_element_access_expr | @dynamic_member_access_expr
                    | @object_creation_expr | @method_invocation_expr | @operator_invocation_expr;

@throw_element = @throw_expr | @throw_stmt;

@implicitly_typeable_object_creation_expr = @object_creation_expr | @explicit_delegate_creation_expr;

implicitly_typed_array_creation(
  unique int id: @array_creation_expr ref);

explicitly_sized_array_creation(
  unique int id: @array_creation_expr ref);

stackalloc_array_creation(
  unique int id: @array_creation_expr ref);

implicitly_typed_object_creation(
  unique int id: @implicitly_typeable_object_creation_expr ref);

mutator_invocation_mode(
  unique int id: @operator_invocation_expr ref,
  int mode: int ref /* prefix = 1, postfix = 2*/);

expr_compiler_generated(
  unique int id: @expr ref);

expr_value(
  unique int id: @expr ref,
  string value: string ref);

expr_call(
  unique int caller_id: @expr ref,
  int target_id: @callable ref);

expr_access(
  unique int accesser_id: @access_expr ref,
  int target_id: @accessible ref);

@accessible = @method | @assignable | @local_function | @namespace;

expr_location(
  unique int id: @expr ref,
  int loc: @location ref);

dynamic_member_name(
  unique int id: @late_bindable_expr ref,
  string name: string ref);

@qualifiable_expr = @member_access_expr
                  | @method_invocation_expr
                  | @element_access_expr;

conditional_access(
  unique int id: @qualifiable_expr ref);

expr_argument(
  unique int id: @expr ref,
  int mode: int ref);
  /* mode is the same as params: value = 0, ref = 1, out = 2 */

expr_argument_name(
  unique int id: @expr ref,
  string name: string ref);

/** CONTROL/DATA FLOW **/

@control_flow_element = @stmt | @expr;

/* XML Files */

xmlEncoding  (
  unique int id: @file ref,
  string encoding: string ref);

xmlDTDs(
  unique int id: @xmldtd,
  string root: string ref,
  string publicId: string ref,
  string systemId: string ref,
  int fileid: @file ref);

xmlElements(
  unique int id: @xmlelement,
  string name: string ref,
  int parentid: @xmlparent ref,
  int idx: int ref,
  int fileid: @file ref);

xmlAttrs(
  unique int id: @xmlattribute,
  int elementid: @xmlelement ref,
  string name: string ref,
  string value: string ref,
  int idx: int ref,
  int fileid: @file ref);

xmlNs(
  int id: @xmlnamespace,
  string prefixName: string ref,
  string URI: string ref,
  int fileid: @file ref);

xmlHasNs(
  int elementId: @xmlnamespaceable ref,
  int nsId: @xmlnamespace ref,
  int fileid: @file ref);

xmlComments(
  unique int id: @xmlcomment,
  string text: string ref,
  int parentid: @xmlparent ref,
  int fileid: @file ref);

xmlChars(
  unique int id: @xmlcharacters,
  string text: string ref,
  int parentid: @xmlparent ref,
  int idx: int ref,
  int isCDATA: int ref,
  int fileid: @file ref);

@xmlparent = @file | @xmlelement;
@xmlnamespaceable = @xmlelement | @xmlattribute;

xmllocations(
  int xmlElement: @xmllocatable ref,
  int location: @location_default ref);

@xmllocatable = @xmlcharacters | @xmlelement | @xmlcomment | @xmlattribute | @xmldtd | @file | @xmlnamespace;

/* Comments */

commentline(
  unique int id: @commentline,
  int kind: int ref,
  string text: string ref,
  string rawtext: string ref);

case @commentline.kind of
  0 = @singlelinecomment
| 1 = @xmldoccomment
| 2 = @multilinecomment;

commentline_location(
  unique int id: @commentline ref,
  int loc: @location ref);

commentblock(
  unique int id : @commentblock);

commentblock_location(
  unique int id: @commentblock ref,
  int loc: @location ref);

commentblock_binding(
  int id: @commentblock ref,
  int entity: @element ref,
  int bindtype: int ref);    /* 0: Parent, 1: Best, 2: Before, 3: After */

commentblock_child(
  int id: @commentblock ref,
  int commentline: @commentline ref,
  int index: int ref);

/* ASP.NET */

case @asp_element.kind of
  0=@asp_close_tag
| 1=@asp_code
| 2=@asp_comment
| 3=@asp_data_binding
| 4=@asp_directive
| 5=@asp_open_tag
| 6=@asp_quoted_string
| 7=@asp_text
| 8=@asp_xml_directive;

@asp_attribute = @asp_code | @asp_data_binding | @asp_quoted_string;

asp_elements(
  unique int id: @asp_element,
  int kind: int ref,
  int loc: @location ref);

asp_comment_server(unique int comment: @asp_comment ref);
asp_code_inline(unique int code: @asp_code ref);
asp_directive_attribute(
  int directive: @asp_directive ref,
  int index: int ref,
  string name: string ref,
  int value: @asp_quoted_string ref);
asp_directive_name(
  unique int directive: @asp_directive ref,
  string name: string ref);
asp_element_body(
  unique int element: @asp_element ref,
  string body: string ref);
asp_tag_attribute(
  int tag: @asp_open_tag ref,
  int index: int ref,
  string name: string ref,
  int attribute: @asp_attribute ref);
asp_tag_name(
  unique int tag: @asp_open_tag ref,
  string name: string ref);
asp_tag_isempty(int tag: @asp_open_tag ref);

/* Common Intermediate Language - CIL */

case @cil_instruction.opcode of
  0 = @cil_nop
| 1 = @cil_break
| 2 = @cil_ldarg_0
| 3 = @cil_ldarg_1
| 4 = @cil_ldarg_2
| 5 = @cil_ldarg_3
| 6 = @cil_ldloc_0
| 7 = @cil_ldloc_1
| 8 = @cil_ldloc_2
| 9 = @cil_ldloc_3
| 10 = @cil_stloc_0
| 11 = @cil_stloc_1
| 12 = @cil_stloc_2
| 13 = @cil_stloc_3
| 14 = @cil_ldarg_s
| 15 = @cil_ldarga_s
| 16 = @cil_starg_s
| 17 = @cil_ldloc_s
| 18 = @cil_ldloca_s
| 19 = @cil_stloc_s
| 20 = @cil_ldnull
| 21 = @cil_ldc_i4_m1
| 22 = @cil_ldc_i4_0
| 23 = @cil_ldc_i4_1
| 24 = @cil_ldc_i4_2
| 25 = @cil_ldc_i4_3
| 26 = @cil_ldc_i4_4
| 27 = @cil_ldc_i4_5
| 28 = @cil_ldc_i4_6
| 29 = @cil_ldc_i4_7
| 30 = @cil_ldc_i4_8
| 31 = @cil_ldc_i4_s
| 32 = @cil_ldc_i4
| 33 = @cil_ldc_i8
| 34 = @cil_ldc_r4
| 35 = @cil_ldc_r8
| 37 = @cil_dup
| 38 = @cil_pop
| 39 = @cil_jmp
| 40 = @cil_call
| 41 = @cil_calli
| 42 = @cil_ret
| 43 = @cil_br_s
| 44 = @cil_brfalse_s
| 45 = @cil_brtrue_s
| 46 = @cil_beq_s
| 47 = @cil_bge_s
| 48 = @cil_bgt_s
| 49 = @cil_ble_s
| 50 = @cil_blt_s
| 51 = @cil_bne_un_s
| 52 = @cil_bge_un_s
| 53 = @cil_bgt_un_s
| 54 = @cil_ble_un_s
| 55 = @cil_blt_un_s
| 56 = @cil_br
| 57 = @cil_brfalse
| 58 = @cil_brtrue
| 59 = @cil_beq
| 60 = @cil_bge
| 61 = @cil_bgt
| 62 = @cil_ble
| 63 = @cil_blt
| 64 = @cil_bne_un
| 65 = @cil_bge_un
| 66 = @cil_bgt_un
| 67 = @cil_ble_un
| 68 = @cil_blt_un
| 69 = @cil_switch
| 70 = @cil_ldind_i1
| 71 = @cil_ldind_u1
| 72 = @cil_ldind_i2
| 73 = @cil_ldind_u2
| 74 = @cil_ldind_i4
| 75 = @cil_ldind_u4
| 76 = @cil_ldind_i8
| 77 = @cil_ldind_i
| 78 = @cil_ldind_r4
| 79 = @cil_ldind_r8
| 80 = @cil_ldind_ref
| 81 = @cil_stind_ref
| 82 = @cil_stind_i1
| 83 = @cil_stind_i2
| 84 = @cil_stind_i4
| 85 = @cil_stind_i8
| 86 = @cil_stind_r4
| 87 = @cil_stind_r8
| 88 = @cil_add
| 89 = @cil_sub
| 90 = @cil_mul
| 91 = @cil_div
| 92 = @cil_div_un
| 93 = @cil_rem
| 94 = @cil_rem_un
| 95 = @cil_and
| 96 = @cil_or
| 97 = @cil_xor
| 98 = @cil_shl
| 99 = @cil_shr
| 100 = @cil_shr_un
| 101 = @cil_neg
| 102 = @cil_not
| 103 = @cil_conv_i1
| 104 = @cil_conv_i2
| 105 = @cil_conv_i4
| 106 = @cil_conv_i8
| 107 = @cil_conv_r4
| 108 = @cil_conv_r8
| 109 = @cil_conv_u4
| 110 = @cil_conv_u8
| 111 = @cil_callvirt
| 112 = @cil_cpobj
| 113 = @cil_ldobj
| 114 = @cil_ldstr
| 115 = @cil_newobj
| 116 = @cil_castclass
| 117 = @cil_isinst
| 118 = @cil_conv_r_un
| 121 = @cil_unbox
| 122 = @cil_throw
| 123 = @cil_ldfld
| 124 = @cil_ldflda
| 125 = @cil_stfld
| 126 = @cil_ldsfld
| 127 = @cil_ldsflda
| 128 = @cil_stsfld
| 129 = @cil_stobj
| 130 = @cil_conv_ovf_i1_un
| 131 = @cil_conv_ovf_i2_un
| 132 = @cil_conv_ovf_i4_un
| 133 = @cil_conv_ovf_i8_un
| 134 = @cil_conv_ovf_u1_un
| 135 = @cil_conv_ovf_u2_un
| 136 = @cil_conv_ovf_u4_un
| 137 = @cil_conv_ovf_u8_un
| 138 = @cil_conv_ovf_i_un
| 139 = @cil_conv_ovf_u_un
| 140 = @cil_box
| 141 = @cil_newarr
| 142 = @cil_ldlen
| 143 = @cil_ldelema
| 144 = @cil_ldelem_i1
| 145 = @cil_ldelem_u1
| 146 = @cil_ldelem_i2
| 147 = @cil_ldelem_u2
| 148 = @cil_ldelem_i4
| 149 = @cil_ldelem_u4
| 150 = @cil_ldelem_i8
| 151 = @cil_ldelem_i
| 152 = @cil_ldelem_r4
| 153 = @cil_ldelem_r8
| 154 = @cil_ldelem_ref
| 155 = @cil_stelem_i
| 156 = @cil_stelem_i1
| 157 = @cil_stelem_i2
| 158 = @cil_stelem_i4
| 159 = @cil_stelem_i8
| 160 = @cil_stelem_r4
| 161 = @cil_stelem_r8
| 162 = @cil_stelem_ref
| 163 = @cil_ldelem
| 164 = @cil_stelem
| 165 = @cil_unbox_any
| 179 = @cil_conv_ovf_i1
| 180 = @cil_conv_ovf_u1
| 181 = @cil_conv_ovf_i2
| 182 = @cil_conv_ovf_u2
| 183 = @cil_conv_ovf_i4
| 184 = @cil_conv_ovf_u4
| 185 = @cil_conv_ovf_i8
| 186 = @cil_conv_ovf_u8
| 194 = @cil_refanyval
| 195 = @cil_ckinfinite
| 198 = @cil_mkrefany
| 208 = @cil_ldtoken
| 209 = @cil_conv_u2
| 210 = @cil_conv_u1
| 211 = @cil_conv_i
| 212 = @cil_conv_ovf_i
| 213 = @cil_conv_ovf_u
| 214 = @cil_add_ovf
| 215 = @cil_add_ovf_un
| 216 = @cil_mul_ovf
| 217 = @cil_mul_ovf_un
| 218 = @cil_sub_ovf
| 219 = @cil_sub_ovf_un
| 220 = @cil_endfinally
| 221 = @cil_leave
| 222 = @cil_leave_s
| 223 = @cil_stind_i
| 224 = @cil_conv_u
| 65024 = @cil_arglist
| 65025 = @cil_ceq
| 65026 = @cil_cgt
| 65027 = @cil_cgt_un
| 65028 = @cil_clt
| 65029 = @cil_clt_un
| 65030 = @cil_ldftn
| 65031 = @cil_ldvirtftn
| 65033 = @cil_ldarg
| 65034 = @cil_ldarga
| 65035 = @cil_starg
| 65036 = @cil_ldloc
| 65037 = @cil_ldloca
| 65038 = @cil_stloc
| 65039 = @cil_localloc
| 65041 = @cil_endfilter
| 65042 = @cil_unaligned
| 65043 = @cil_volatile
| 65044 = @cil_tail
| 65045 = @cil_initobj
| 65046 = @cil_constrained
| 65047 = @cil_cpblk
| 65048 = @cil_initblk
| 65050 = @cil_rethrow
| 65052 = @cil_sizeof
| 65053 = @cil_refanytype
| 65054 = @cil_readonly
;

// CIL ignored instructions

@cil_ignore = @cil_nop | @cil_break | @cil_volatile | @cil_unaligned;

// CIL local/parameter/field access

@cil_ldarg_any = @cil_ldarg_0 | @cil_ldarg_1 | @cil_ldarg_2 | @cil_ldarg_3 | @cil_ldarg_s | @cil_ldarga_s | @cil_ldarg | @cil_ldarga;
@cil_starg_any = @cil_starg | @cil_starg_s;

@cil_ldloc_any = @cil_ldloc_0 | @cil_ldloc_1 | @cil_ldloc_2 | @cil_ldloc_3 | @cil_ldloc_s | @cil_ldloca_s | @cil_ldloc | @cil_ldloca;
@cil_stloc_any = @cil_stloc_0 | @cil_stloc_1 | @cil_stloc_2 | @cil_stloc_3 | @cil_stloc_s | @cil_stloc;

@cil_ldfld_any = @cil_ldfld | @cil_ldsfld | @cil_ldsflda | @cil_ldflda;
@cil_stfld_any = @cil_stfld | @cil_stsfld;

@cil_local_access = @cil_stloc_any | @cil_ldloc_any;
@cil_arg_access = @cil_starg_any | @cil_ldarg_any;
@cil_read_access = @cil_ldloc_any | @cil_ldarg_any | @cil_ldfld_any;
@cil_write_access = @cil_stloc_any | @cil_starg_any | @cil_stfld_any;

@cil_stack_access = @cil_local_access | @cil_arg_access;
@cil_field_access = @cil_ldfld_any | @cil_stfld_any;

@cil_access = @cil_read_access | @cil_write_access;

// CIL constant/literal instructions

@cil_ldc_i = @cil_ldc_i4_any | @cil_ldc_i8;

@cil_ldc_i4_any = @cil_ldc_i4_m1 | @cil_ldc_i4_0 | @cil_ldc_i4_1 | @cil_ldc_i4_2 | @cil_ldc_i4_3 |
  @cil_ldc_i4_4 | @cil_ldc_i4_5 | @cil_ldc_i4_6 | @cil_ldc_i4_7 | @cil_ldc_i4_8 | @cil_ldc_i4_s | @cil_ldc_i4;

@cil_ldc_r = @cil_ldc_r4 | @cil_ldc_r8;

@cil_literal = @cil_ldnull | @cil_ldc_i | @cil_ldc_r | @cil_ldstr;

// Control flow

@cil_conditional_jump = @cil_binary_jump | @cil_unary_jump;
@cil_binary_jump = @cil_beq_s | @cil_bge_s | @cil_bgt_s | @cil_ble_s | @cil_blt_s |
    @cil_bne_un_s | @cil_bge_un_s | @cil_bgt_un_s | @cil_ble_un_s | @cil_blt_un_s |
    @cil_beq | @cil_bge | @cil_bgt | @cil_ble | @cil_blt |
    @cil_bne_un | @cil_bge_un | @cil_bgt_un | @cil_ble_un | @cil_blt_un;
@cil_unary_jump = @cil_brfalse_s | @cil_brtrue_s | @cil_brfalse | @cil_brtrue | @cil_switch;
@cil_unconditional_jump = @cil_br | @cil_br_s | @cil_leave_any;
@cil_leave_any = @cil_leave | @cil_leave_s;
@cil_jump = @cil_unconditional_jump | @cil_conditional_jump;

// CIL call instructions

@cil_call_any = @cil_jmp | @cil_call | @cil_calli | @cil_tail | @cil_callvirt | @cil_newobj;

// CIL expression instructions

@cil_expr = @cil_literal | @cil_binary_expr | @cil_unary_expr | @cil_call_any | @cil_read_access |
  @cil_newarr | @cil_ldtoken | @cil_sizeof |
  @cil_ldftn | @cil_ldvirtftn | @cil_localloc | @cil_mkrefany | @cil_refanytype | @cil_arglist | @cil_dup;

@cil_unary_expr =
  @cil_conversion_operation | @cil_unary_arithmetic_operation | @cil_unary_bitwise_operation|
  @cil_ldlen | @cil_isinst | @cil_box | @cil_ldobj | @cil_castclass | @cil_unbox_any |
  @cil_ldind | @cil_unbox;

@cil_conversion_operation =
  @cil_conv_i1 | @cil_conv_i2 | @cil_conv_i4 | @cil_conv_i8 |
  @cil_conv_u1 | @cil_conv_u2 | @cil_conv_u4 | @cil_conv_u8 |
  @cil_conv_ovf_i | @cil_conv_ovf_i_un | @cil_conv_ovf_i1 | @cil_conv_ovf_i1_un |
  @cil_conv_ovf_i2 | @cil_conv_ovf_i2_un | @cil_conv_ovf_i4 | @cil_conv_ovf_i4_un |
  @cil_conv_ovf_i8 | @cil_conv_ovf_i8_un | @cil_conv_ovf_u | @cil_conv_ovf_u_un |
  @cil_conv_ovf_u1 | @cil_conv_ovf_u1_un | @cil_conv_ovf_u2 | @cil_conv_ovf_u2_un |
  @cil_conv_ovf_u4 | @cil_conv_ovf_u4_un | @cil_conv_ovf_u8 | @cil_conv_ovf_u8_un |
  @cil_conv_r4 | @cil_conv_r8 | @cil_conv_ovf_u2 | @cil_conv_ovf_u2_un |
  @cil_conv_i | @cil_conv_u | @cil_conv_r_un;

@cil_ldind = @cil_ldind_i | @cil_ldind_i1 | @cil_ldind_i2 | @cil_ldind_i4 | @cil_ldind_i8 |
  @cil_ldind_r4 | @cil_ldind_r8 | @cil_ldind_ref | @cil_ldind_u1 | @cil_ldind_u2 | @cil_ldind_u4;

@cil_stind = @cil_stind_i | @cil_stind_i1 | @cil_stind_i2 | @cil_stind_i4 | @cil_stind_i8 |
  @cil_stind_r4 | @cil_stind_r8 | @cil_stind_ref;

@cil_bitwise_operation = @cil_binary_bitwise_operation | @cil_unary_bitwise_operation;

@cil_binary_bitwise_operation = @cil_and | @cil_or | @cil_xor | @cil_shr | @cil_shr | @cil_shr_un | @cil_shl;

@cil_binary_arithmetic_operation = @cil_add | @cil_sub | @cil_mul | @cil_div | @cil_div_un |
  @cil_rem | @cil_rem_un | @cil_add_ovf | @cil_add_ovf_un | @cil_mul_ovf | @cil_mul_ovf_un |
  @cil_sub_ovf | @cil_sub_ovf_un;

@cil_unary_bitwise_operation = @cil_not;

@cil_binary_expr = @cil_binary_arithmetic_operation | @cil_binary_bitwise_operation | @cil_read_array | @cil_comparison_operation;

@cil_unary_arithmetic_operation = @cil_neg;

@cil_comparison_operation = @cil_cgt_un | @cil_ceq | @cil_cgt | @cil_clt | @cil_clt_un;

// Elements that retrieve an address of something
@cil_read_ref = @cil_ldloca_s | @cil_ldarga_s | @cil_ldflda | @cil_ldsflda | @cil_ldelema;

// CIL array instructions

@cil_read_array =
  @cil_ldelem | @cil_ldelema | @cil_ldelem_i1 | @cil_ldelem_ref | @cil_ldelem_i |
  @cil_ldelem_i1 | @cil_ldelem_i2 | @cil_ldelem_i4 | @cil_ldelem_i8 | @cil_ldelem_r4 |
  @cil_ldelem_r8 | @cil_ldelem_u1 | @cil_ldelem_u2 | @cil_ldelem_u4;

@cil_write_array = @cil_stelem | @cil_stelem_ref |
  @cil_stelem_i | @cil_stelem_i1 | @cil_stelem_i2 | @cil_stelem_i4 | @cil_stelem_i8 |
  @cil_stelem_r4 | @cil_stelem_r8;

@cil_throw_any = @cil_throw | @cil_rethrow;

#keyset[impl, index]
cil_instruction(
  unique int id: @cil_instruction,
  int opcode: int ref,
  int index: int ref,
  int impl: @cil_method_implementation ref);

cil_jump(
  unique int instruction: @cil_jump ref,
  int target: @cil_instruction ref);

cil_access(
  unique int instruction: @cil_instruction ref,
  int target: @cil_accessible ref);

cil_value(
  unique int instruction: @cil_literal ref,
  string value: string ref);

#keyset[instruction, index]
cil_switch(
  int instruction: @cil_switch ref,
  int index: int ref,
  int target: @cil_instruction ref);

cil_instruction_location(
  unique int id: @cil_instruction ref,
  int loc: @location ref);

cil_type_location(
  int id: @cil_type ref,
  int loc: @location ref);

cil_method_location(
  int id: @cil_method ref,
  int loc: @location ref);

@cil_namespace = @namespace;

@cil_type_container = @cil_type | @cil_namespace | @cil_method;

case @cil_type.kind of
  0 = @cil_valueorreftype
| 1 = @cil_typeparameter
| 2 = @cil_array_type
| 3 = @cil_pointer_type
| 4 = @cil_function_pointer_type
;

cil_type(
  unique int id: @cil_type,
  string name: string ref,
  int kind: int ref,
  int parent: @cil_type_container ref,
  int sourceDecl: @cil_type ref);

cil_pointer_type(
  unique int id: @cil_pointer_type ref,
  int pointee: @cil_type ref);

cil_array_type(
  unique int id: @cil_array_type ref,
  int element_type: @cil_type ref,
  int rank: int ref);

cil_function_pointer_return_type(
  unique int id: @cil_function_pointer_type ref,
  int return_type: @cil_type ref);

cil_method(
  unique int id: @cil_method,
  string name: string ref,
  int parent: @cil_type ref,
  int return_type: @cil_type ref);

cil_method_source_declaration(
  unique int method: @cil_method ref,
  int source: @cil_method ref);

cil_method_implementation(
  unique int id: @cil_method_implementation,
  int method: @cil_method ref,
  int location: @assembly ref);

cil_implements(
  int id: @cil_method ref,
  int decl: @cil_method ref);

#keyset[parent, name]
cil_field(
  unique int id: @cil_field,
  int parent: @cil_type ref,
  string name: string ref,
  int field_type: @cil_type ref);

@cil_element = @cil_instruction | @cil_declaration | @cil_handler | @cil_attribute | @cil_namespace;
@cil_named_element = @cil_declaration | @cil_namespace;
@cil_declaration = @cil_variable | @cil_method | @cil_type | @cil_member;
@cil_accessible = @cil_declaration;
@cil_variable = @cil_field | @cil_stack_variable;
@cil_stack_variable = @cil_local_variable | @cil_parameter;
@cil_member = @cil_method | @cil_type | @cil_field | @cil_property | @cil_event;
@cil_custom_modifier_receiver = @cil_method | @cil_property | @cil_parameter | @cil_field | @cil_function_pointer_type;
@cil_parameterizable = @cil_method | @cil_function_pointer_type;
@cil_has_type_annotation = @cil_stack_variable | @cil_property | @cil_method | @cil_function_pointer_type;

#keyset[parameterizable, index]
cil_parameter(
  unique int id: @cil_parameter,
  int parameterizable: @cil_parameterizable ref,
  int index: int ref,
  int param_type: @cil_type ref);

cil_parameter_in(unique int id: @cil_parameter ref);
cil_parameter_out(unique int id: @cil_parameter ref);

cil_setter(unique int prop: @cil_property ref,
  int method: @cil_method ref);

#keyset[id, modifier]
cil_custom_modifiers(
  int id: @cil_custom_modifier_receiver ref,
  int modifier: @cil_type ref,
  int kind: int ref); // modreq: 1, modopt: 0

cil_type_annotation(
  int id: @cil_has_type_annotation ref,
  int annotation: int ref);

cil_getter(unique int prop: @cil_property ref,
  int method: @cil_method ref);

cil_adder(unique int event: @cil_event ref,
  int method: @cil_method ref);

cil_remover(unique int event: @cil_event ref, int method: @cil_method ref);

cil_raiser(unique int event: @cil_event ref, int method: @cil_method ref);

cil_property(
  unique int id: @cil_property,
  int parent: @cil_type ref,
  string name: string ref,
  int property_type: @cil_type ref);

#keyset[parent, name]
cil_event(unique int id: @cil_event,
  int parent: @cil_type ref,
  string name: string ref,
  int event_type: @cil_type ref);

#keyset[impl, index]
cil_local_variable(
  unique int id: @cil_local_variable,
  int impl: @cil_method_implementation ref,
  int index: int ref,
  int var_type: @cil_type ref);

cil_function_pointer_calling_conventions(
  int id: @cil_function_pointer_type ref,
  int kind: int ref);

// CIL handlers (exception handlers etc).

case @cil_handler.kind of
  0 = @cil_catch_handler
| 1 = @cil_filter_handler
| 2 = @cil_finally_handler
| 4 = @cil_fault_handler
;

#keyset[impl, index]
cil_handler(
  unique int id: @cil_handler,
  int impl: @cil_method_implementation ref,
  int index: int ref,
  int kind: int ref,
  int try_start: @cil_instruction ref,
  int try_end: @cil_instruction ref,
  int handler_start: @cil_instruction ref);

cil_handler_filter(
  unique int id: @cil_handler ref,
  int filter_start: @cil_instruction ref);

cil_handler_type(
  unique int id: @cil_handler ref,
  int catch_type: @cil_type ref);

@cil_controlflow_node = @cil_entry_point | @cil_instruction;

@cil_entry_point = @cil_method_implementation | @cil_handler;

@cil_dataflow_node = @cil_instruction | @cil_variable | @cil_method;

cil_method_stack_size(
  unique int method: @cil_method_implementation ref,
  int size: int ref);

// CIL modifiers

cil_public(int id: @cil_member ref);
cil_private(int id: @cil_member ref);
cil_protected(int id: @cil_member ref);
cil_internal(int id: @cil_member ref);
cil_static(int id: @cil_member ref);
cil_sealed(int id: @cil_member ref);
cil_virtual(int id: @cil_method ref);
cil_abstract(int id: @cil_member ref);
cil_class(int id: @cil_type ref);
cil_interface(int id: @cil_type ref);
cil_security(int id: @cil_member ref);
cil_requiresecobject(int id: @cil_method ref);
cil_specialname(int id: @cil_method ref);
cil_newslot(int id: @cil_method ref);

cil_base_class(unique int id: @cil_type ref, int base: @cil_type ref);
cil_base_interface(int id: @cil_type ref, int base: @cil_type ref);
cil_enum_underlying_type(unique int id: @cil_type ref, int underlying: @cil_type ref);

#keyset[unbound, index]
cil_type_parameter(
  int unbound: @cil_member ref,
  int index: int ref,
  int param: @cil_typeparameter ref);

#keyset[bound, index]
cil_type_argument(
  int bound: @cil_member ref,
  int index: int ref,
  int t: @cil_type ref);

// CIL type parameter constraints

cil_typeparam_covariant(int tp: @cil_typeparameter ref);
cil_typeparam_contravariant(int tp: @cil_typeparameter ref);
cil_typeparam_class(int tp: @cil_typeparameter ref);
cil_typeparam_struct(int tp: @cil_typeparameter ref);
cil_typeparam_new(int tp: @cil_typeparameter ref);
cil_typeparam_constraint(int tp: @cil_typeparameter ref, int supertype: @cil_type ref);

// CIL attributes

cil_attribute(
  unique int attributeid: @cil_attribute,
  int element: @cil_declaration ref,
  int constructor: @cil_method ref);

#keyset[attribute_id, param]
cil_attribute_named_argument(
  int attribute_id: @cil_attribute ref,
  string param: string ref,
  string value: string ref);

#keyset[attribute_id, index]
cil_attribute_positional_argument(
  int attribute_id: @cil_attribute ref,
  int index: int ref,
  string value: string ref);


// Common .Net data model covering both C# and CIL

// Common elements
@dotnet_element = @element | @cil_element;
@dotnet_named_element = @named_element | @cil_named_element;
@dotnet_callable = @callable | @cil_method;
@dotnet_variable = @variable | @cil_variable;
@dotnet_field = @field | @cil_field;
@dotnet_parameter = @parameter | @cil_parameter;
@dotnet_declaration = @declaration | @cil_declaration;
@dotnet_member = @member | @cil_member;
@dotnet_event = @event | @cil_event;
@dotnet_property = @property | @cil_property | @indexer;
@dotnet_parameterizable = @parameterizable | @cil_parameterizable;

// Common types
@dotnet_type = @type | @cil_type;
@dotnet_call = @call | @cil_call_any;
@dotnet_throw = @throw_element | @cil_throw_any;
@dotnet_valueorreftype = @cil_valueorreftype | @value_or_ref_type | @cil_array_type | @void_type;
@dotnet_typeparameter = @type_parameter | @cil_typeparameter;
@dotnet_array_type = @array_type | @cil_array_type;
@dotnet_pointer_type = @pointer_type | @cil_pointer_type;
@dotnet_type_parameter = @type_parameter | @cil_typeparameter;
@dotnet_generic = @dotnet_valueorreftype | @dotnet_callable;

// Attributes
@dotnet_attribute = @attribute | @cil_attribute;

// Expressions
@dotnet_expr = @expr | @cil_expr;

// Literals
@dotnet_literal = @literal_expr | @cil_literal;
@dotnet_string_literal = @string_literal_expr | @cil_ldstr;
@dotnet_int_literal = @integer_literal_expr | @cil_ldc_i;
@dotnet_float_literal = @float_literal_expr | @cil_ldc_r;
@dotnet_null_literal = @null_literal_expr | @cil_ldnull;

@metadata_entity = @cil_method | @cil_type | @cil_field | @cil_property | @field | @property |
    @callable | @value_or_ref_type | @void_type;

#keyset[entity, location]
metadata_handle(int entity : @metadata_entity ref, int location: @assembly ref, int handle: int ref)