use a2lmacros::a2l_specification;

use crate::a2ml;
use crate::writer;
use crate::tokenizer::A2lTokenType;
use crate::parser::{ParseContext, ParseError, ParserState};
use crate::ifdata;


/// Describes the location and formatting of an a2l block within a file
#[derive(PartialEq, Clone)]
pub struct BlockInfo<T> {
    pub incfile: Option<String>,
    pub line: u32,
    pub uid: u32,
    pub start_offset: u32,
    pub end_offset: u32,
    pub item_location: T
}


/// The trait A2lObject is implemented for all a2l objects as well as all objects generated by the a2ml_specification! macro.
/// It gives access to layout and location data which is tracked for each object in an a2l file.
pub trait A2lObject<T> {
    /// get a reference to the BlockInfo that describes the layout of the a2l object
    fn get_layout(&self) -> &BlockInfo<T>;

    /// get a mutable reference to the BlockInfo that describes the layout of the a2l object
    fn get_layout_mut(&mut self) -> &mut BlockInfo<T>;

    /// reset the location information on the a2l object. It will be treated like a new object when writing a file
    fn reset_location(&mut self);

    /// reset the reference to an include file on this objct and its children.
    /// This causes the object to be written into the output file instead of referenced through /include "filename"
    fn merge_includes(&mut self);

    /// get the source line number from which the current a2l object was loaded.
    /// Returns 0 if the object was newly created and not loaded from a file
    fn get_line(&self) -> u32;
}


/// The trait A2lObjectName is automatically implemented for named a2l objects
pub trait A2lObjectName {
    /// get the name of an a2l object.
    /// this trait is only implemented for those objects that have names, which is a subset of all objects
    fn get_name(&self) -> &str;
}


a2l_specification! {
    /// Contains all the objects of an A2lfile
    ///
    /// An instance of this struct is returned when an a2l file is loaded successfully
    keyword A2L_FILE {
        [-> ASAP2_VERSION]
        [-> A2ML_VERSION]   
        [-> PROJECT]!
    }

    /// Description of the addressing of table values or axis point values.
    ///
    /// Specification: predefined data types
    enum AddrType {
        PBYTE,
        PWORD,
        PLONG,
        PLONGLONG   (1.70 ..),
        DIRECT
    }

    /// Description of the word lengths in the ECU program.
    ///
    /// Specification: predefined data types (datasize)
    enum DataTypeSize {
        BYTE,
        WORD,
        LONG
    }

    /// Description of the basic data types in the ECU program.
    ///
    /// Specification: predefined data types
    enum DataType {
        UBYTE,
        SBYTE,
        UWORD,
        SWORD,
        ULONG,
        SLONG,
        A_UINT64       (1.60 ..),
        A_INT64        (1.60 ..),
        FLOAT16_IEEE   (1.71 ..),
        FLOAT32_IEEE,
        FLOAT64_IEEE
    }

    /// Description of the axis point sequence in the memory.
    ///
    /// Specification: predefined data types
    enum IndexOrder {
        INDEX_INCR,
        INDEX_DECR
    }

    /// Contains AML code for description of interface specific description data.
    ///
    /// Specification: 3.5.2
    block A2ML {
        // the A2ML block gets special treatment in the code generator based on the block name
    }

    /// A2ML_VERSION is currently ignored
    ///
    /// Specification: 3.5.3
    keyword A2ML_VERSION {
        uint version_no
        uint upgrade_no
    }

    /// Address of the EPROM identifier
    ///
    /// Specification: 3.5.4
    keyword ADDR_EPK {
        ulong address
    }

    /// Defines the alignment of byte-sized values in complex objects (maps and axis)
    ///
    /// Specification: 3.5.5
    keyword ALIGNMENT_BYTE {
        uint alignment_border
    }

    /// Defines the alignment of 32bit floats in complex objects (maps and axis)
    ///
    /// Specification: 3.5.6
    keyword ALIGNMENT_FLOAT32_IEEE {
        uint alignment_border
    }

    /// Defines the alignment of 64bit floats in complex objects (maps and axis)
    ///
    /// Specification: 3.5.7
    keyword ALIGNMENT_FLOAT64_IEEE {
        uint alignment_border
    }

    /// Defines the alignment of int64 values in complex objects (maps and axis)
    ///
    /// Specification: 3.5.8
    keyword ALIGNMENT_INT64 {
        uint alignment_border
    }

    /// Defines the alignment of long-sized values in complex objects (maps and axis)
    ///
    /// Specification: 3.5.9
    keyword ALIGNMENT_LONG {
        uint alignment_border
    }

    /// Defines the alignment of word-sized values in complex objects (maps and axis)
    ///
    /// Specification: 3.5.10
    keyword ALIGNMENT_WORD {
        uint alignment_border
    }

    /// An extended description text
    ///
    /// One ANNOTATION may represent a voluminous description. Its purpose is to be e.g.
    /// an application note which explains the function of an identifier for the calibration
    /// engineer.
    ///
    /// Specification: 3.5.11
    block ANNOTATION {
        [-> ANNOTATION_LABEL]
        [-> ANNOTATION_ORIGIN]
        [-> ANNOTATION_TEXT]
    }

    /// The title of an annotation
    ///
    /// Specification: 3.5.12
    keyword ANNOTATION_LABEL {
        string label
    }

    /// Identify who or which system has created an annotation
    ///
    /// Specification: 3.5.13
    keyword ANNOTATION_ORIGIN {
        string origin
    }

    /// Text of an annotation
    ///
    /// One ANNOTATION_TEXT may represent a multi-line description text
    ///
    /// Specification: 3.5.14
    block ANNOTATION_TEXT {
        {string annotation_text}* annotation_text_list
    }

    /// marks a measurement object as an array of <Number> measurement values
    ///
    /// Specification: 3.5.15
    keyword ARRAY_SIZE {
        uint number
    }

    /// Version of the ASAM MCD-2MC standard used by this file
    ///
    /// This keyword is mandatory. Example:
    ///     ASAP2_VERSION 1 61
    ///
    /// Specification: 3.5.16
    keyword ASAP2_VERSION {
        uint version_no
        uint upgrade_no
    }

    /// Description of the axis points
    ///
    /// Specification: 3.5.17
    enum AxisDescrAttribute {
        CURVE_AXIS,
        COM_AXIS,
        FIX_AXIS,
        RES_AXIS,
        STD_AXIS
    }

    /// Axis description within an adjustable object
    ///
    /// Specification: 3.5.17
    block AXIS_DESCR {
        AxisDescrAttribute attribute
        ident input_quantity
        ident conversion
        uint max_axis_points
        float lower_limit
        float upper_limit
        [-> ANNOTATION]*
        [-> AXIS_PTS_REF]
        [-> BYTE_ORDER]
        [-> CURVE_AXIS_REF]
        [-> DEPOSIT]
        [-> EXTENDED_LIMITS]
        [-> FIX_AXIS_PAR]
        [-> FIX_AXIS_PAR_DIST]
        [-> FIX_AXIS_PAR_LIST]
        [-> FORMAT]
        [-> MAX_GRAD]
        [-> MONOTONY]
        [-> PHYS_UNIT]    (1.60 ..)
        [-> READ_ONLY]
        [-> STEP_SIZE]    (1.60 ..)
    }

    /// Parameters for the handling of an axis points distribution
    ///
    /// Specification: 3.5.18
    block AXIS_PTS {
        ident name
        string long_identifier
        ulong address
        ident input_quantity
        ident deposit_record
        float max_diff
        ident conversion
        uint max_axis_points
        float lower_limit
        float upper_limit
        [-> ANNOTATION]*
        [-> BYTE_ORDER]
        [-> CALIBRATION_ACCESS]
        [-> DEPOSIT]
        [-> DISPLAY_IDENTIFIER]
        [-> ECU_ADDRESS_EXTENSION]
        [-> EXTENDED_LIMITS]
        [-> FORMAT]
        [-> FUNCTION_LIST]
        [-> GUARD_RAILS]
        [-> IF_DATA]*
        [-> MONOTONY]
        [-> PHYS_UNIT]     (1.60 ..)
        [-> READ_ONLY]
        [-> REF_MEMORY_SEGMENT]
        [-> STEP_SIZE]     (1.60 ..)
        [-> SYMBOL_LINK]
    }

    /// Reference to an AXIS_PTS record
    ///
    /// Specification: 3.5.19
    keyword AXIS_PTS_REF {
        ident axis_points
    }

    /// Description of the X, Y, Z, Z4 or Z5 axis points in memory
    ///
    /// Specification: 3.5.20
    keyword AXIS_PTS_X / _Y / _Z / _4 / _5 {
        uint position
        DataType datatype
        IndexOrder index_incr
        AddrType addressing
    }

    /// Description of rescaling the axis values of an adjustable object
    ///
    /// Specification: 3.5.21
    keyword AXIS_RESCALE_X /_Y /_Z / _4 / _5 {
        uint position
        DataType datatype
        uint max_number_of_rescale_pairs
        IndexOrder index_incr
        AddrType addressing
    }

    /// The BIT_MASK keyword can be used to mask out single bits of the value to be processed.
    ///
    /// Specification: 3.5.22
    keyword BIT_MASK {
        ulong mask
    }

    /// Used to perform bit operation on a value
    ///
    /// Specification: 3.5.23
    block BIT_OPERATION {
        [-> LEFT_SHIFT]
        [-> RIGHT_SHIFT]
        [-> SIGN_EXTEND]
    }

    /// Byte ordering of a value on the ECU
    ///
    /// Specification: 3.5.24
    enum ByteOrderEnum {
        LITTLE_ENDIAN        (.. 1.51),
        BIG_ENDIAN           (.. 1.51),
        MSB_LAST,
        MSB_FIRST,
        MSB_FIRST_MSW_LAST   (1.70 ..),
        MSB_LAST_MSW_FIRST   (1.70 ..)
    }

    /// Where the standard value does not apply this parameter can be used to specify the byte order
    ///
    /// Specification: 3.5.24
    keyword BYTE_ORDER {
        ByteOrderEnum byte_order
    }

    /// Type of access that is possible for a CHARACTERISTIC or AXIS_PTS object
    ///
    /// Specification: 3.5.25
    enum CalibrationAccessEnum {
        CALIBRATION,
        NO_CALIBRATION,
        NOT_IN_MCD_SYSTEM,
        OFFLINE_CALIBRATION
    }

    /// Specifies the access of a CHARACTERISTIC or AXIS_PTS for calibration
    ///
    /// Specification: 3.5.25
    keyword CALIBRATION_ACCESS {
        CalibrationAccessEnum calibration_access
    }

    /// calibration method specific data
    ///
    /// Specification: 3.5.26
    block CALIBRATION_HANDLE {
        {long handle}* handle_list
        [-> CALIBRATION_HANDLE_TEXT] (1.60 ..)
    }

    /// Additional text for a calibration handle
    ///
    /// Specification: 3.5.27
    keyword CALIBRATION_HANDLE_TEXT {
        string text
    }

    /// Indicates the different methods of access that are implemented in the ECU
    ///
    /// Valid strings are: "InCircuit", "SERAM", "DSERAP", "BSERAP"
    ///
    /// Specification: 3.5.28
    block CALIBRATION_METHOD {
        string method
        ulong version
        [-> CALIBRATION_HANDLE]
    }

    /// Specifies the type of an adjustable object
    ///
    /// Specification: 3.5.29
    enum CharacteristicType {
        ASCII,
        CURVE,
        MAP,
        CUBOID,
        CUBE_4  (1.60 ..),
        CUBE_5  (1.60 ..),
        VAL_BLK,
        VALUE
    }

    /// Specifies all the parameters of an adjustable object
    ///
    /// Specification: 3.5.29
    block CHARACTERISTIC {
        ident name
        string long_identifier
        CharacteristicType characteristic_type
        ulong address
        ident deposit
        float max_diff
        ident conversion
        float lower_limit
        float upper_limit
        [-> ANNOTATION]*
        [-> AXIS_DESCR]*
        [-> BIT_MASK]
        [-> BYTE_ORDER]
        [-> CALIBRATION_ACCESS]
        [-> COMPARISON_QUANTITY]
        [-> DEPENDENT_CHARACTERISTIC]
        [-> DISCRETE]   (1.60 ..)
        [-> DISPLAY_IDENTIFIER]
        [-> ECU_ADDRESS_EXTENSION]
        [-> ENCODING]   (1.70 ..)
        [-> EXTENDED_LIMITS]
        [-> FORMAT]
        [-> FUNCTION_LIST]
        [-> GUARD_RAILS]
        [-> IF_DATA]*
        [-> MAP_LIST]
        [-> MATRIX_DIM]
        [-> MAX_REFRESH]
        [-> MODEL_LINK]  (1.70 ..)
        [-> NUMBER]      // (.. 1.51) - causes too many deprecation warnings in real files
        [-> PHYS_UNIT]   (1.60 ..)
        [-> READ_ONLY]
        [-> REF_MEMORY_SEGMENT]
        [-> STEP_SIZE]   (1.60 ..)
        [-> SYMBOL_LINK] (1.60 ..)
        [-> VIRTUAL_CHARACTERISTIC]
    }

    /// Specifies the coefficients for the formula f(x) = (axx + bx + c) / (dxx + ex + f)
    ///
    /// Specification: 3.5.30
    keyword COEFFS {
        float a
        float b
        float c
        float d
        float e
        float f
    }

    /// Specifies the coefficients for the linear formula f(x) = ax + b
    ///
    /// Specification: 3.5.31
    keyword COEFFS_LINEAR {
        float a
        float b
    }

    /// references a valid MEASUREMENT
    ///
    /// Specification: 3.5.32
    keyword COMPARISON_QUANTITY {
        ident name
    }

    /// Describes how to convert internal input values to physical values
    ///
    /// Specification: 3.5.33
    enum ConversionType {
        IDENTICAL  (1.60 ..),
        FORM,
        LINEAR  (1.60 ..),
        RAT_FUNC,
        TAB_INTP,
        TAB_NOINTP,
        TAB_VERB
    }

    /// Specification of a conversion method from internal values to physical values
    ///
    /// Specification: 3.5.33
    block COMPU_METHOD {
        ident name
        string long_identifier
        ConversionType conversion_type
        string format
        string unit
        [-> COEFFS]
        [-> COEFFS_LINEAR]
        [-> COMPU_TAB_REF]
        [-> FORMULA]
        [-> REF_UNIT]
        [-> STATUS_STRING_REF]    (1.60 ..)
    }

    /// Conversion table for conversions that cannot be represented as a function
    ///
    /// Specification: 3.5.34
    block COMPU_TAB {
        ident name
        string long_identifier
        ConversionType conversion_type
        uint number_value_pairs
        {
            float in_val
            float out_val
        }* tab_entry
        [-> DEFAULT_VALUE]
        [-> DEFAULT_VALUE_NUMERIC]  (1.60 ..)
    }

    /// reference to a conversion table
    ///
    /// Specification: 3.5.35
    keyword COMPU_TAB_REF {
        ident conversion_table
    }

    /// Conversion table for the assignment of display strings to values. Typically used for enums.
    ///
    /// Specification: 3.5.36
    block COMPU_VTAB {
        ident name
        string long_identifier
        ConversionType conversion_type
        uint number_value_pairs
        {
            float in_val
            string out_val
        }* value_pairs
        [-> DEFAULT_VALUE]
    }

    /// Conversion table for the assignment of display strings to a value range
    ///
    /// Specification: 3.5.37
    block COMPU_VTAB_RANGE {
        ident name
        string long_identifier
        uint number_value_triples
        {
            float in_val_min
            float in_val_max
            string out_val
        }* value_triples
        [-> DEFAULT_VALUE]
    }

    /// Identifies the CPU used in the ECU
    ///
    /// Specification: 3.5.38
    keyword CPU_TYPE {
        string cpu
    }

    /// Used to specify the adjustable CURVE CHARACTERISTIC that is used to normalize or scale the axis in an AXIS_DESCR
    ///
    /// Specification: 3.5.39
    keyword CURVE_AXIS_REF {
        ident curve_axis
    }

    /// Allows a customer name to be specified
    ///
    /// Specification: 3.5.40
    keyword CUSTOMER {
        string customer
    }

    /// specify a customer number or identifier as a string
    ///
    /// Specification: 3.5.41
    keyword CUSTOMER_NO {
        string number
    }

    /// Data size in bits
    ///
    /// Specification: 3.5.42
    keyword DATA_SIZE {
        uint size
    }

    /// Defines which adjustable objects are used by a FUNCTION
    ///
    /// Specification: 3.5.43
    block DEF_CHARACTERISTIC {
        { ident identifier }* identifier_list
    }

    /// Sets the default text value of COMPU_TAB, COMPU_VTAB or COMPU_VTAB_RANGE
    ///
    /// Specification: 3.5.44
    keyword DEFAULT_VALUE {
        string display_string
    }

    /// Sets the default numerical value of COMPU_TAB, COMPU_VTAB or COMPU_VTAB_RANGE
    ///
    /// Specification: 3.5.45
    keyword DEFAULT_VALUE_NUMERIC {
        float display_value
    }

    /// Specify characteristics that depend on a formula
    ///
    /// Specification: 3.5.46
    block DEPENDENT_CHARACTERISTIC {
        string formula
        {ident characteristic}* characteristic_list
    }

    /// Deposit of the axis points of a characteristic curve or map
    ///
    /// Specification: 3.5.47
    enum DepositMode {
        ABSOLUTE,
        DIFFERENCE
    }

    /// Specifies how the axis points of a characteristic are deposited in memory
    ///
    /// Specification: 3.5.47
    keyword DEPOSIT {
        DepositMode mode
    }

    /// Indicates that a measurement or calibration object has discrete values which should not be interpolated
    ///
    /// Specification: 3.5.48
    keyword DISCRETE {}

    /// Gives the display name of a CHARACTERISTIC or MEASUREMENT value
    ///
    /// Specification: 3.5.49
    keyword DISPLAY_IDENTIFIER {
        ident display_name
    }

    /// Description of the distance operand in the deposit structure to compute the axis points for fixed characteristic curves and fixed characteristic maps
    ///
    /// Specification: 3.5.50
    keyword DIST_OP_X / _Y / _Z / _4 / _5 {
        uint position
        DataType datatype
    }

    /// String for identification of the control unit.
    ///
    /// Specification: 3.5.51
    keyword ECU {
        string control_unit
    }

    /// Provides the address of a MEASUREMENT
    ///
    /// Specification: 3.5.52
    keyword ECU_ADDRESS {
        ulong address
    }

    /// Used to specify additional address information
    ///
    /// Specification: 3.5.53
    keyword ECU_ADDRESS_EXTENSION {
        int extension
    }

    /// Provide an address offset in order to handle near pointers or variant coding
    ///
    /// Specification: 3.5.54
    keyword ECU_CALIBRATION_OFFSET {
        long offset
    }

    /// EPROM identifier
    ///
    /// Specification: 3.5.55
    keyword EPK {
        string identifier
    }

    /// Used to mask bits of a MEASUREMENT which indicate that the value is in error
    ///
    /// Specification: 3.5.56
    keyword ERROR_MASK {
        ulong mask
    }

    /// used to specify an extended range of values
    ///
    /// Specification: 3.5.57
    keyword EXTENDED_LIMITS {
        float lower_limit
        float upper_limit
    }

    /// Parameters for the calculation of fixed axis points: X_i = Offset + (i - 1)*2^shift 
    ///
    /// Specification: 3.5.58
    keyword FIX_AXIS_PAR {
        int offset
        int shift
        uint number_apo
    }

    /// Parameters for the calculation of fixed axis points: X_i = Offset + (i - 1)*distance 
    ///
    /// Specification: 3.5.59
    keyword FIX_AXIS_PAR_DIST {
        int offset
        int distance
        uint number_apo
    }

    /// A list of fixed axis point, as implemented on the ECU
    ///
    /// Specification: 3.5.60
    block FIX_AXIS_PAR_LIST {
        { float axis_pts_value }* axis_pts_value_list
    }

    /// Specifies the number of axis points available to CURVE, MAP, CUBOID, CUBE_4 or CUBE_5
    ///
    /// Specification: 3.5.61
    keyword FIX_NO_AXIS_PTS_X / _Y / _Z / _4 / _5 {
        uint number_of_axis_points
    }

    /// Describes how the 2-dimensional table values are mapped onto the 1-dimensional address space
    ///
    /// Specification: 3.5.62
    enum IndexMode {
        ALTERNATE_CURVES,
        ALTERNATE_WITH_X,
        ALTERNATE_WITH_Y,
        COLUMN_DIR,
        ROW_DIR
    }

    /// Description of the table values (function values) of an adjustable object
    ///
    /// Specification: 3.5.62
    keyword FNC_VALUES {
        uint position
        DataType datatype
        IndexMode index_mode
        AddrType address_type
    }

    /// Allows a display format string to be specified for a MEASUREMENT, CHARACTERISTIC or AXIS_PTS object
    ///
    /// Specification: 3.5.63
    keyword FORMAT {
        string format_string
    }

    /// Allows any kind of formula to be specified
    ///
    /// Specification: 3.5.64
    block FORMULA {
        string fx
        [-> FORMULA_INV]
    }

    /// Allows an inverse formula to be specified
    ///
    /// Specification: 3.5.65
    keyword FORMULA_INV {
        string gx
    }

    /// Defines a function frame to structure large amounts of measurement objects
    ///
    /// Specification: 3.5.66
    block FRAME {
        ident name
        string long_identifier
        uint scaling_unit
        ulong rate
        [-> FRAME_MEASUREMENT]
        [-> IF_DATA]*
    }

    /// Contains a list of identifiers of measurement objects
    ///
    /// Specification: 3.5.67
    keyword FRAME_MEASUREMENT {
        { ident identifier}* identifier_list
    }

    /// Describes the input, local, and output variables of a function on the ECU
    ///
    /// Specification: 3.5.68
    block FUNCTION {
        ident name
        string long_identifier
        [-> ANNOTATION]*
        [-> AR_COMPONENT]   (1.70 ..)
        [-> DEF_CHARACTERISTIC]
        [-> FUNCTION_VERSION]
        [-> IF_DATA]*    (1.60 ..)
        [-> IN_MEASUREMENT]
        [-> LOC_MEASUREMENT]
        [-> OUT_MEASUREMENT]
        [-> REF_CHARACTERISTIC]
        [-> SUB_FUNCTION]
    }

    /// a list of FUNCTION objects
    ///
    /// Specification: 3.5.69
    block FUNCTION_LIST {
        {ident name}* name_list
    }

    /// A string containing the version of a FUNCTION
    ///
    /// Specification: 3.5.70
    keyword FUNCTION_VERSION {
        string version_identifier
    }

    /// Defines a group of releated CHARACTERISTIC and MEASUREMENT objects
    ///
    /// Specification: 3.5.71
    block GROUP {
        ident name
        string long_identifier
        [-> ANNOTATION]*
        [-> FUNCTION_LIST]
        [-> IF_DATA]*     (1.60 ..)
        [-> REF_CHARACTERISTIC]
        [-> REF_MEASUREMENT]
        [-> ROOT]
        [-> SUB_GROUP]
    }

    /// Used to indicate that an adjustable CURVE, MAP or AXIS_PTS uses guard rails
    ///
    /// Specification: 3.5.72
    keyword GUARD_RAILS {}

    /// The header of a project
    ///
    /// Specification: 3.5.73
    block HEADER {
        string comment
        [-> PROJECT_NO]
        [-> VERSION]
    }

    /// used to describe that an 'identifier' is deposited in a specific position in the adjustable object
    ///
    /// Specification: 3.5.74
    keyword IDENTIFICATION {
        uint position
        DataType datatype
    }

    /// Interface specific data
    ///
    /// Specification: 3.5.75
    block IF_DATA {
        // the A2ML block gets special treatment in the code generator based on the block name
    }

    /// A list of measurement objects that are used as the inputs of a function
    ///
    /// Specification: 3.5.76
    block IN_MEASUREMENT {
        {ident identifier}* identifier_list
    }

    /// describes the layout of a multi-dimensional measurement array
    ///
    /// Specification: 3.5.77
    keyword LAYOUT {
        IndexMode index_mode
    }

    /// Used within BIT_OPERATION to left-shift the bits of a value
    ///
    /// Specification: 3.5.78
    keyword LEFT_SHIFT {
        ulong bitcount
    }

    /// A list of measurement objects that are local variables of a function
    ///
    /// Specification: 3.5.79
    block LOC_MEASUREMENT {
        {ident identifier}* identifier_list
    }

    /// used to specify the list of MAPs which comprise a CUBOID
    ///
    /// Specification: 3.5.80
    block MAP_LIST {
        {ident name}* name_list
    }

    /// describes the dimensions of a multidimensional array of values
    ///
    /// Specification: 3.5.81
    keyword MATRIX_DIM {
        {uint dim}* dim_list // note: changed for 1.70
    }

    /// specifies a maximum permissible gradient for an adjustable object
    ///
    /// Specification: 3.5.82
    keyword MAX_GRAD {
        float max_gradient
    }

    /// specifies the maximum refresh rate in the control unit
    ///
    /// Specification: 3.5.83
    keyword MAX_REFRESH {
        uint scaling_unit
        ulong rate
    }

    /// describes the parameters for a measurement object
    ///
    /// Specification: 3.5.84
    block MEASUREMENT {
        ident name
        string long_identifier
        DataType datatype
        ident conversion
        uint resolution
        float accuracy
        float lower_limit
        float upper_limit
        [-> ANNOTATION]*
        [-> ARRAY_SIZE] (.. 1.51)
        [-> BIT_MASK]
        [-> BIT_OPERATION]
        [-> BYTE_ORDER]
        [-> DISCRETE]  (1.60 ..)
        [-> DISPLAY_IDENTIFIER]
        [-> ECU_ADDRESS]
        [-> ECU_ADDRESS_EXTENSION]
        [-> ERROR_MASK]
        [-> FORMAT]
        [-> FUNCTION_LIST]
        [-> IF_DATA]*
        [-> LAYOUT]   (1.60 ..)
        [-> MATRIX_DIM]
        [-> MAX_REFRESH]
        [-> PHYS_UNIT]   (1.60 ..)
        [-> READ_WRITE]
        [-> REF_MEMORY_SEGMENT]
        [-> SYMBOL_LINK]   (1.60 ..)
        [-> VIRTUAL]
    }

    /// describes the types of program segments
    ///
    /// Specification: 3.5.85
    enum ProgType {
        PRG_CODE,
        PRG_DATA,
        PRG_RESERVED
    }

    /// describes the layout of the ECU memory
    ///
    /// Specification: 3.5.85
    block MEMORY_LAYOUT {
        ProgType prog_type
        ulong address
        ulong size
        long[5] offset
        [-> IF_DATA]*
    }

    /// Describes the types of data in the ECU program
    ///
    /// Specification: 3.5.86
    enum PrgType {
        CALIBRATION_VARIABLES,
        CODE,
        DATA,
        EXCLUDE_FROM_FLASH,
        OFFLINE_DATA,
        RESERVED,
        SERAM,
        VARIABLES
    }

    /// describes the type of memory used
    ///
    /// Specification: 3.5.86
    enum MemoryType {
        EEPROM,
        EPROM,
        FLASH,
        RAM,
        ROM,
        REGISTER,
        NOT_IN_ECU   (1.70 ..)
    }

    /// specifies if a given memory region is internal or external
    ///
    /// Specification: 3.5.86
    enum MemoryAttribute {
        INTERN,
        EXTERN
    }

    /// describes a memory segment of the ECU program
    ///
    /// Specification: 3.5.86
    block MEMORY_SEGMENT {
        ident name
        string long_identifier
        PrgType prg_type
        MemoryType memory_type
        MemoryAttribute attribute
        ulong address
        ulong size
        long[5] offset
        [-> IF_DATA]*
    }

    /// defines default values for the  entire module
    ///
    /// Specification: 3.5.87
    block MOD_COMMON {
        string comment
        [-> ALIGNMENT_BYTE]
        [-> ALIGNMENT_FLOAT16_IEEE]   (1.71 ..)
        [-> ALIGNMENT_FLOAT32_IEEE]
        [-> ALIGNMENT_FLOAT64_IEEE]
        [-> ALIGNMENT_INT64]    (1.60 ..)
        [-> ALIGNMENT_LONG]
        [-> ALIGNMENT_WORD]
        [-> BYTE_ORDER]
        [-> DATA_SIZE]
        [-> DEPOSIT]
        [-> S_REC_LAYOUT] (.. 1.60) // deprecated in 1.61: RECORD_LAYOUT is always mandatory
    }

    /// defines system information and management data for the module
    ///
    /// Specification: 3.5.88
    block MOD_PAR {
        string comment
        [-> ADDR_EPK]*
        [-> CALIBRATION_METHOD]*
        [-> CPU_TYPE]
        [-> CUSTOMER]
        [-> CUSTOMER_NO]
        [-> ECU]
        [-> ECU_CALIBRATION_OFFSET]
        [-> EPK]
        [-> MEMORY_LAYOUT]*
        [-> MEMORY_SEGMENT]*
        [-> NO_OF_INTERFACES]
        [-> PHONE_NO]
        [-> SUPPLIER]
        [-> SYSTEM_CONSTANT]*
        [-> USER]
        [-> VERSION]
    }

    /// The MODULE keyword describes a complete ECU or device with all adjustable and measurement objects, conversion methods and functions
    ///
    /// At least one module must be defined within the PROJECT
    ///
    /// Specification: 3.5.89
    block MODULE {
        ident name
        string long_identifier
        [-> A2ML]
        [-> AXIS_PTS]*
        [-> BLOB]*                     (1.70 ..)
        [-> CHARACTERISTIC]*
        [-> COMPU_METHOD]*
        [-> COMPU_TAB]*
        [-> COMPU_VTAB]*
        [-> COMPU_VTAB_RANGE]*
        [-> FRAME]*
        [-> FUNCTION]*
        [-> GROUP]*
        [-> IF_DATA]*
        [-> INSTANCE]*                 (1.70 ..)
        [-> MEASUREMENT]*
        [-> MOD_COMMON]
        [-> MOD_PAR]
        [-> RECORD_LAYOUT]*
        [-> TRANSFORMER]*              (1.70 ..)
        [-> TYPEDEF_BLOB]*             (1.70 ..)
        [-> TYPEDEF_AXIS]*             (1.70 ..)
        [-> TYPEDEF_CHARACTERISTIC]*   (1.70 ..)
        [-> TYPEDEF_MEASUREMENT]*      (1.70 ..)
        [-> TYPEDEF_STRUCTURE]*        (1.70 ..)
        [-> UNIT]*
        [-> USER_RIGHTS]*
        [-> VARIANT_CODING]
    }

    /// describes the possible ways an adjustment object can be monotonous
    ///
    /// Specification: 3.5.90
    enum MonotonyType {
        MON_DECREASE,
        MON_INCREASE,
        STRICT_DECREASE,
        STRICT_INCREASE,
        MONOTONOUS    (1.60 ..),
        STRICT_MON    (1.60 ..),
        NOT_MON       (1.60 ..)
    }


    /// specifies the monotony of an adjustment object
    ///
    /// Specification: 3.5.90
    keyword MONOTONY {
        MonotonyType monotony
    }

    /// Description of the number of axis points in an adjustable object
    ///
    /// Specification: 3.5.91
    keyword NO_AXIS_PTS_X / _Y / _Z / _4 / _5 {
        uint position
        DataType datatype
    }

    /// the number of interfaces
    ///
    /// Specification: 3.5.92
    keyword NO_OF_INTERFACES {
        uint num
    }

    /// number of rescaling axis point value pairs
    ///
    /// Specification: 3.5.93
    keyword NO_RESCALE_X / _Y / _Z / _4 / _5 {
        uint position
        DataType datatype
    }

    /// specifies the number of values in an array. Obsolete, replaced by MATRIX_DIM
    ///
    /// Specification: 3.5.94
    keyword NUMBER {
        uint number
    }

    /// Description of the 'offset' parameter in the deposit structure
    ///
    /// Specification: 3.5.95
    keyword OFFSET_X / _Y / _Z / _4 / _5 {
        uint position
        DataType datatype
    }

    /// defines output quantities of a function
    ///
    /// Specification: 3.5.96
    block OUT_MEASUREMENT {
        {ident identifier}* identifier_list
    }

    /// contains a phone number, e.g. of the calibration engineer
    ///
    /// Specification: 3.5.97
    keyword PHONE_NO {
        string telnum
    }

    /// specifies the physical unit of a measurement or calibration object as a string
    ///
    /// Specification: 3.5.98
    keyword PHYS_UNIT {
        string unit
    }

    /// Project description with project header and all modules belonging to the project. Required.
    ///
    /// Specification: 3.5.99
    block PROJECT {
        ident name
        string long_identifier
        [-> HEADER]
        [-> MODULE]+
    }

    /// Gives the project identifier
    ///
    /// Specification: 3.5.100
    keyword PROJECT_NO {
        ident project_number
    }

    /// used to indicate that an adjustable object is read-only
    ///
    /// Specification: 3.5.101
    keyword READ_ONLY {}

    /// used to indicate that a measurement object is writeable
    ///
    /// Specification: 3.5.102
    keyword READ_WRITE {}

    /// specifies the various data structures of an adjustable objects in memory
    ///
    /// Specification: 3.5.103
    block RECORD_LAYOUT {
        ident name
        [-> ALIGNMENT_BYTE]
        [-> ALIGNMENT_FLOAT16_IEEE]  (1.71 ..)
        [-> ALIGNMENT_FLOAT32_IEEE]
        [-> ALIGNMENT_FLOAT64_IEEE]
        [-> ALIGNMENT_INT64]
        [-> ALIGNMENT_LONG]
        [-> ALIGNMENT_WORD]
        [-> AXIS_PTS_X/_Y/_Z/_4/_5]
        [-> AXIS_RESCALE_X/_Y/_Z/_4/_5]
        [-> DIST_OP_X/_Y/_Z/_4/_5]
        [-> FIX_NO_AXIS_PTS_X/_Y/_Z/_4/_5]
        [-> FNC_VALUES]
        [-> IDENTIFICATION]
        [-> NO_AXIS_PTS_X/_Y/_Z/_4/_5]
        [-> NO_RESCALE_X/_Y/_Z/_4/_5]
        [-> OFFSET_X/_Y/_Z/_4/_5]
        [-> RESERVED]*
        [-> RIP_ADDR_W/_X/_Y/_Z/_4/_5]
        [-> SRC_ADDR_X/_Y/_Z/_4/_5]
        [-> SHIFT_OP_X/_Y/_Z/_4/_5]
        [-> STATIC_RECORD_LAYOUT]    (1.60 ..)
        [-> STATIC_ADDRESS_OFFSETS]  (1.70 ..)
    }

    /// defines a list of adjustable objects that can be referenced by a function or group
    ///
    /// Specification: 3.5.104
    block REF_CHARACTERISTIC {
        { ident identifier}* identifier_list
    }

    /// defines a list of groups for use by USER_RIGHTS
    ///
    /// Specification: 3.5.105
    block REF_GROUP {
        { ident identifier}* identifier_list
    }

    /// defines a list of measurement objects that can be referenced by a group
    ///
    /// Specification: 3.5.106
    block REF_MEASUREMENT {
        { ident identifier}* identifier_list
    }

    /// reference to a MEMORY_SEGMENT
    ///
    /// Specification: 3.5.107
    block REF_MEMORY_SEGMENT {
        ident name
    }

    /// reference to a UNIT
    ///
    /// Specification: 3.5.108
    block REF_UNIT {
        ident unit
    }

    /// indicates that the data at the given position is reserved and should not be interpreted by the MCD system
    ///
    /// Specification: 3.5.109
    keyword RESERVED {
        uint position
        DataTypeSize data_size
    }

    /// Used within BIT_OPERATION to right-shift the bits of a value
    ///
    /// Specification: 3.5.110
    keyword RIGHT_SHIFT {
        ulong bitcount
    }

    /// Describes the storage of the ECU-internal result of interpolation (RIP)
    ///
    /// Specification: 3.5.111
    keyword RIP_ADDR_W / _X / _Y / _Z / _4 / _5 {
        uint position
        DataType datatype
    }
    
    /// indicates that the current group is at the root of the navigation tree
    ///
    /// Specification: 3.5.112
    keyword ROOT {}

    /// Description of the shift operand in the deposit structure to compute the axis points for fixed characteristic curves and fixed characteristic maps
    ///
    /// Specification: 3.5.113
    keyword SHIFT_OP_X / _Y / _Z / _4 / _5 {
        uint position
        DataType datatype
    }
    
    /// used in BIT_OPERATION to specify that sign extension should be performed
    ///
    /// Specification: 3.5.114
    keyword SIGN_EXTEND {}

    /// the seven base dimensions required to define an extended SI unit
    ///
    /// Specification: 3.5.115
    keyword SI_EXPONENTS {
        int length
        int mass
        int time
        int electric_current
        int temperature
        int amount_of_substance
        int luminous_intensity
    }

    /// Description of the address of the input quantity in an adjustable object
    ///
    /// Specification: 3.5.116
    keyword SRC_ADDR_X / _Y / _Z / _4 / _5 {
        uint position
        DataType datatype
    }

    /// indicates that an adjustable object with dynamic number of axis points does not compact or expand data when removing or inserting axis points
    ///
    /// Specification: 3.5.117
    keyword STATIC_RECORD_LAYOUT {}

    /// used to split up the value range of ECU internal values into a numerical and a verbal part
    ///
    /// Specification: 3.5.118
    keyword STATUS_STRING_REF {
        ident conversion_table
    }

    /// step size when adjusting the value of a CHARACTERISTIC, AXIS_PTS or AXIS_DESCR
    ///
    /// Specification: 3.5.119
    keyword STEP_SIZE {
        float step_size
    }

    /// a list of identifiers of functions which are sub-functions of the current function
    ///
    /// Specification: 3.5.120
    block SUB_FUNCTION {
        { ident identifier}* identifier_list
    }

    /// a list of identifiers of groups which are subgroups of the current group
    ///
    /// Specification: 3.5.121
    block SUB_GROUP {
        { ident identifier}* identifier_list
    }

    /// Name of the ECU manufacturer
    ///
    /// Specification: 3.5.122
    keyword SUPPLIER {
        string manufacturer
    }

    /// specifes the name of a symbol within a linker map file that corresponds to the a2l object
    ///
    /// Specification: 3.5.123
    keyword SYMBOL_LINK {
        string symbol_name
        long offset
    }

    /// defines a system constant that can be used in conversion formulas
    ///
    /// Specification: 3.5.124
    keyword SYSTEM_CONSTANT {
        string name
        string value
    }

    /// sets the standard record layout for the module
    ///
    /// Specification: 3.5.125
    keyword S_REC_LAYOUT {
        ident name
    }

    /// Type of the UNIT
    ///
    /// Specification: 3.5.126
    enum UnitType {
        DERIVED,
        EXTENDED_SI
    }

    /// Specification of a measurement unit
    ///
    /// Specification: 3.5.126
    block UNIT {
        ident name
        string long_identifier
        string display
        UnitType unit_type
        [-> REF_UNIT]
        [-> SI_EXPONENTS]
        [-> UNIT_CONVERSION]
    }

    /// Specification of the linear relationship between two measurement units
    ///
    /// Specification: 3.5.127
    keyword UNIT_CONVERSION {
        float gradient
        float offset
    }

    /// Name of the user
    ///
    /// Specification: 3.5.128
    keyword USER {
        string user_name
    }

    /// used to define groups accessible only for certain users
    ///
    /// Specification: 3.5.129
    block USER_RIGHTS {
        ident user_level_id
        [-> READ_ONLY]
        [-> REF_GROUP]*
    }

    /// define a list of start addresses of variant coded adjustable objects
    ///
    /// Specification: 3.5.130
    block VAR_ADDRESS {
        { ulong address}* address_list
    }

    /// defines one adjustable object to be variant coded
    ///
    /// Specification: 3.5.131
    block VAR_CHARACTERISTIC {
        ident name
        { ident criterion_name }* criterion_name_list
        [-> VAR_ADDRESS]
    }

    /// describes a variant criterion
    ///
    /// Specification: 3.5.132
    block VAR_CRITERION {
        ident name
        string long_identifier
        {ident  value}* value_list
        [-> VAR_MEASUREMENT]
        [-> VAR_SELECTION_CHARACTERISTIC]
    }

    /// describes a forbidden combination of values of different variant criteria
    ///
    /// Specification: 3.5.133
    block VAR_FORBIDDEN_COMB {
        {
            ident criterion_name
            ident criterion_value
        }* combination
    }

    /// specify a special measurement object which indicates the currently active variant
    ///
    /// Specification: 3.5.134
    keyword VAR_MEASUREMENT {
        ident name
    }

    /// intended to define the format of the variant extension. Currently only one format is supported
    ///
    /// Specification: 3.5.135
    enum VarNamingTag {
        NUMERIC
    }

    /// defines the format of the variant extension (index) of adjustable object names
    ///
    /// Specification: 3.5.135
    keyword VAR_NAMING {
        VarNamingTag tag
    }

    /// used to specify a special characteristic object which can change the currently active variant
    ///
    /// Specification: 3.5.136
    keyword VAR_SELECTION_CHARACTERISTIC {
        ident name
    }

    /// defines the separating symbol between the two parts of an adjustable object name
    ///
    /// Specification: 3.5.137
    keyword VAR_SEPARATOR {
        string separator
    }

    /// All information related to variant coding is grouped in this structure
    ///
    /// Specification: 3.5.138
    block VARIANT_CODING {
        [-> VAR_CHARACTERISTIC]*
        [-> VAR_CRITERION]*
        [-> VAR_FORBIDDEN_COMB]*
        [-> VAR_NAMING]
        [-> VAR_SEPARATOR]
    }

    /// version identifier
    ///
    /// Specification: 3.5.139
    keyword VERSION {
        string version_identifier
    }

    /// specification of the measurement objects for a virtual measurement channel
    ///
    /// Specification: 3.5.140
    block VIRTUAL {
        { ident measuring_channel }* measuring_channel_list
    }

    /// defines characteristics that are not deposited in the memory of the control unit, but can be used to indirectly calibrate other characteristic values
    ///
    /// Specification: 3.5.141
    block VIRTUAL_CHARACTERISTIC {
        string formula
        {ident characteristic }* characteristic_list
    }


    // ----------------------------------------------------------
    // new elements as of 1.7.0
    // ----------------------------------------------------------

    /// Describes the encoding of a string, if it is not ASCII
    enum CharacterEncoding {
        UTF8,
        UTF16,
        UTF32
    }

    /// Description of the addressing of table values or axis point values.
    keyword ADDRESS_TYPE {
        AddrType address_type
    }

    /// Defines the alignment of 16bit floats in complex objects (maps and axis)
    keyword ALIGNMENT_FLOAT16_IEEE {
        uint alignment_border
    }

    /// describes the Autosar component type of a function
    keyword AR_COMPONENT {
        string component_type
    }

    /// Special data object that can be used to handle domain specific data, which are processed inside the ECU in a dedicated way
    block BLOB {
        ident name
        string long_identifier
        ulong start_address
        ulong size
        [-> ADDRESS_TYPE]
        [-> ANNOTATION]*
        [-> CALIBRATION_ACCESS]
        [-> DISPLAY_IDENTIFIER]
        [-> ECU_ADDRESS_EXTENSION]
        [-> IF_DATA]*
        [-> MAX_REFRESH]
        [-> MODEL_LINK]
        [-> SYMBOL_LINK]
    }

    keyword CONSISTENT_EXCHANGE {}

    /// a CHARACTERISTIC of type ASCII can be configured to use a multi-byte encoding instead
    keyword ENCODING {
        CharacterEncoding encoding
    }

    /// Creates an instance of a type defined using TYPEDEF_STRUCTURE
    block INSTANCE {
        ident name
        string long_identifier
        ident type_ref
        ulong start_address
        [-> ADDRESS_TYPE]  (1.71 ..)
        [-> ANNOTATION]*
        [-> CALIBRATION_ACCESS]
        [-> DISPLAY_IDENTIFIER]
        [-> ECU_ADDRESS_EXTENSION]
        [-> IF_DATA]*
        [-> MATRIX_DIM]
        [-> MAX_REFRESH]
        [-> MODEL_LINK]
        [-> OVERWRITE]
        [-> READ_ONLY]
        [-> SYMBOL_LINK]
    }

    /// add a string to a CHARACTERISTIC linking it to a name in the model
    keyword MODEL_LINK {
        string model_link
    }

    /// override some default attributes of a type definition in a specific INSTANCE.
    /// Added in 1.70; currently incomplete and non-functional
    keyword OVERWRITE {
        // TODO
    }

    /// indicates that the start addresses of axes and function values of an adjustable object do not change when removing or inserting axis points
    keyword STATIC_ADDRESS_OFFSETS {}

    /// defines a single component of a TYPEDEF_STRUCTURE
    block STRUCTURE_COMPONENT {
        ident component_name
        ident component_type
        ulong size
        [-> ADDRESS_TYPE]  (1.71 ..)
        [-> LAYOUT]
        [-> MATRIX_DIM]
        [-> SYMBOL_TYPE_LINK]
    }

    /// Specifies the name of a symbol within a linker map file or debug file that describes a class, class member, structure or structure component
    keyword SYMBOL_TYPE_LINK {
        string symbol_type
    }

    /// the trigger conditions of a TRANSFORMER
    enum TransformerTrigger {
        ON_USER_REQUEST,
        ON_CHANGE
    }

    /// Definition of call to an external function (32-bit or 64-bit DLL) for converting calibration object values between their implementation format and physical format
    block TRANSFORMER {
        ident name
        string version
        string dllname_32bit
        string dllname_64bit
        uint timeout
        TransformerTrigger trigger
        ident inverse_transformer
        [-> TRANSFORMER_IN_OBJECTS]
        [-> TRANSFORMER_OUT_OBJECTS]
    }

    /// provides a list of inputs for a TRANSFORMER
    block TRANSFORMER_IN_OBJECTS {
        {ident identifier}* identifier_list
    }

    /// provides a list of outputs for a TRANSFORMER
    block TRANSFORMER_OUT_OBJECTS {
        {ident identifier}* identifier_list
    }

    /// Type definition of an axis object
    block TYPEDEF_AXIS {
        ident name
        string long_identifier
        ident input_quantity
        ident record_layout
        float max_diff
        ident conversion
        uint max_axis_points
        float lower_limit
        float upper_limit
        [-> BYTE_ORDER]
        [-> DEPOSIT]
        [-> EXTENDED_LIMITS]
        [-> FORMAT]
        [-> MONOTONY]
        [-> PHYS_UNIT]
        [-> STEP_SIZE]
    }

    /// Type definition of a BLOB
    block TYPEDEF_BLOB {
        ident name
        string long_identifier
        ulong size
        [-> ADDRESS_TYPE]  (1.71 ..)
    }

    /// Type definition of a calibration object
    block TYPEDEF_CHARACTERISTIC {
        ident name
        string long_identifier
        CharacteristicType characteristic_type
        ident record_layout
        float max_diff
        ident conversion
        float lower_limit
        float upper_limit
        [-> AXIS_DESCR]*
        [-> BIT_MASK]
        [-> BYTE_ORDER]
        [-> DISCRETE]
        [-> ENCODING]
        [-> EXTENDED_LIMITS]
        [-> FORMAT]
        [-> MATRIX_DIM]
        [-> NUMBER]     // (.. 1.51)
        [-> PHYS_UNIT]
        [-> STEP_SIZE]
    }

    /// Type definition of a measurement object
    block TYPEDEF_MEASUREMENT {
        ident name
        string long_identifier
        DataType datatype
        ident conversion
        uint resolution
        float accuracy
        float lower_limit
        float upper_limit
        [-> BIT_MASK]
        [-> BIT_OPERATION]
        [-> BYTE_ORDER]
        [-> ERROR_MASK]
        [-> DISCRETE]
        [-> FORMAT]
        [-> LAYOUT]
        [-> MATRIX_DIM]
        [-> PHYS_UNIT]
    }

    /// Definition of structured data types similar to the "typedef" command in C
    block TYPEDEF_STRUCTURE {
        ident name
        string long_identifier
        ulong total_size
        [-> ADDRESS_TYPE]
        [-> CONSISTENT_EXCHANGE]
        [-> STRUCTURE_COMPONENT]*
        [-> SYMBOL_TYPE_LINK]
    }
}


/// A2ML is a special case in the specification.
/// It contains the ASAP2 metalanguage code that describes the content of IF_DATA blocks
#[derive(Clone)]
pub struct A2ml {
    pub a2ml_text: String,
    pub(crate) __block_info: BlockInfo<(u32, ())>
}

impl std::fmt::Debug for A2ml {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("A2ml")
        .field("a2ml_text", &self.a2ml_text)
        .finish()
    }
}

impl A2ml {
    pub fn new(a2ml_text: String) -> Self {
        Self {
            a2ml_text,
            __block_info: BlockInfo {
                incfile: None,
                line: 0,
                uid: 0,
                start_offset: 1,
                end_offset: 1,
                item_location: (0, ())
            }
        }
    }

    pub(crate) fn parse(parser: &mut ParserState, context: &ParseContext, start_offset: u32) -> Result<Self, ParseError> {
        let fileid = parser.get_incfilename(context.fileid);
        let line = context.line;
        let uid = parser.get_next_id();

        let __a2ml_text_location = parser.get_current_line_offset();
        let token = parser.expect_token(context, A2lTokenType::String)?;
        let a2ml_text = parser.get_token_text(token).to_string();

        match a2ml::parse_a2ml(&a2ml_text) {
            Ok(a2mlspec) => parser.file_a2mlspec = Some(a2mlspec),
            Err(errmsg) => parser.error_or_log(ParseError::A2mlError(errmsg))?,
        }

        parser.expect_token(context, A2lTokenType::End)?;
        let ident = parser.get_identifier(context)?;
        if ident != "A2ML" {
            parser.error_or_log(ParseError::IncorrectEndTag(context.clone(), ident))?;
        }

        Ok(A2ml {
            a2ml_text,
            __block_info: BlockInfo {
                incfile: fileid,
                line,
                uid,
                start_offset,
                end_offset: 1, // the real offset is more difficult to calculate, because the a2ml text is the only multi-line element
                item_location: (__a2ml_text_location, ())
            }
        })
    }

    pub(crate) fn stringify(&self, indent: usize) -> String {
        let mut writer = writer::Writer::new(indent);
        writer.add_str(&self.a2ml_text, self.__block_info.item_location.0);
        writer.finish()
    }
}

impl A2lObject<(u32, ())> for A2ml {
    fn get_layout(&self) -> &BlockInfo<(u32, ())> {
        &self.__block_info
    }

    fn get_layout_mut(&mut self) -> &mut BlockInfo<(u32, ())> {
        &mut self.__block_info
    }

    // clear the location info (include filename and uid) of an object
    // unlike merge_includes() this function does not operate recursively
    fn reset_location(&mut self) {
        self.merge_includes();
        self.__block_info.uid = 0;
    }

    fn merge_includes(&mut self) {
        self.__block_info.incfile = None;
    }

    fn get_line(&self) -> u32 {
        self.__block_info.line
    }
}

// manual implementation of PartialEq that ignores __block_info: the layout/location doesn't matter when testing equality
impl PartialEq for A2ml {
    fn eq(&self, other: &Self) -> bool {
        self.a2ml_text == other.a2ml_text
    }
}


/// The content of IF_DATA blocks is not directly described in the specification.
/// Instead the content description is provided at runtime through the A2ML block.
#[derive(Clone)]
pub struct IfData {
    /// contains the content of the IF_DATA in generic form
    pub ifdata_items: Option<a2ml::GenericIfData>,
    /// ifdata_valid indicates if the data matched an A2ML specification during parsing or not
    pub ifdata_valid: bool,
    pub(crate) __block_info: BlockInfo<()>
}

impl std::fmt::Debug for IfData {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("IfData")
        .field("ifdata_items", &self.ifdata_items)
        .finish()
    }
}


impl IfData {
    pub fn new() -> Self {
        Self {
            ifdata_items: None,
            ifdata_valid: false,
            __block_info: BlockInfo {
                incfile: None,
                line: 0,
                uid: 0,
                start_offset: 1,
                end_offset: 1,
                item_location: ()
            }
        }
    }

    pub(crate) fn parse(parser: &mut ParserState, context: &ParseContext, start_offset: u32) -> Result<Self, ParseError> {
        let fileid = parser.get_incfilename(context.fileid);
        let line = context.line;
        let uid = parser.get_next_id();

        let (ifdata_items, ifdata_valid) = ifdata::parse_ifdata(parser, context)?;

        let end_offset = parser.get_current_line_offset();
        parser.expect_token(context, A2lTokenType::End)?;
        let ident = parser.get_identifier(context)?;
        if ident != "IF_DATA" {
            parser.error_or_log(ParseError::IncorrectEndTag(context.clone(), ident))?;
        }

        Ok(IfData {
            ifdata_items,
            ifdata_valid,
            __block_info: BlockInfo {
                incfile: fileid,
                line,
                uid,
                start_offset,
                end_offset,
                item_location: ()
            }
        })
    }

    pub(crate) fn stringify(&self, indent: usize) -> String {
        if let Some(ifdata_items) = &self.ifdata_items {
            // ifdata items were wrapped in an extra layer that would cause a double indent in the output
            ifdata_items.write(indent - 1)
        } else {
            "".to_string()
        }
    }
}

impl A2lObject<()> for IfData {
    fn get_layout(&self) -> &BlockInfo<()> {
        &self.__block_info
    }

    fn get_layout_mut(&mut self) -> &mut BlockInfo<()> {
        &mut self.__block_info
    }

    // clear the location info (include filename and uid) of an object
    // unlike merge_includes() this function does not operate recursively
    fn reset_location(&mut self) {
        self.merge_includes();
        self.__block_info.uid = 0;
    }

    fn merge_includes(&mut self) {
        self.__block_info.incfile = None;
        if let Some(ifdata_items) = &mut self.ifdata_items {
            // ifdata_items is an un-decoded GenericIfData. It can directly handle merge_includes()
            ifdata_items.merge_includes();
        }
    }

    fn get_line(&self) -> u32 {
        self.__block_info.line
    }
}

// manual implementation of PartialEq that ignores __block_info: the layout/location doesn't matter when testing equality
impl PartialEq for IfData {
    fn eq(&self, other: &Self) -> bool {
        self.ifdata_items == other.ifdata_items
    }
}