Enum Expression 

pub enum Expression {
    Constant(u32),
    SymbolAddressIndex(u16),
    SectionAddressIndex(u16),
    Bank(u16),
    SectOf(u16),
    Offset(u16),
    SectionStart(u16),
    GroupStart(u16),
    GroupOf(u16),
    Segment(u16),
    GroupOrg(u16),
    SectionEnd(u16),
    Equals(Box<Expression>, Box<Expression>),
    NotEquals(Box<Expression>, Box<Expression>),
    LTE(Box<Expression>, Box<Expression>),
    LessThan(Box<Expression>, Box<Expression>),
    GTE(Box<Expression>, Box<Expression>),
    GreaterThan(Box<Expression>, Box<Expression>),
    Add(Box<Expression>, Box<Expression>),
    Subtract(Box<Expression>, Box<Expression>),
    Multiply(Box<Expression>, Box<Expression>),
    Divide(Box<Expression>, Box<Expression>),
    And(Box<Expression>, Box<Expression>),
    Or(Box<Expression>, Box<Expression>),
    XOR(Box<Expression>, Box<Expression>),
    LeftShift(Box<Expression>, Box<Expression>),
    RightShift(Box<Expression>, Box<Expression>),
    Mod(Box<Expression>, Box<Expression>),
    Dashes(Box<Expression>, Box<Expression>),
    Revword(Box<Expression>, Box<Expression>),
    Check0(Box<Expression>, Box<Expression>),
    Check1(Box<Expression>, Box<Expression>),
    BitRange(Box<Expression>, Box<Expression>),
    ArshiftChk(Box<Expression>, Box<Expression>),
}

An expression used in relocations.

PSY-Q uses a sophisticated expression system for calculating relocated addresses. Expressions can be constants, symbol references, or complex arithmetic operations.

Example Expressions

• $1000 - Constant value 0x1000
• [5] - Address of symbol #5
• sectbase(2) - Base address of section #2
• (sectstart(1)+$100) - Section 1 start plus 0x100

Variants

Constant(u32)

A constant value (tag 0x00).

SymbolAddressIndex(u16)

Index of a symbol’s address (tag 0x02).

SectionAddressIndex(u16)

Base address of a section (tag 0x04).

Bank(u16)

Untested

SectOf(u16)

Untested

Offset(u16)

Untested

SectionStart(u16)

Start address of a section (tag 0x0C).

GroupStart(u16)

Untested

GroupOf(u16)

Untested

Segment(u16)

Untested

GroupOrg(u16)

Untested

SectionEnd(u16)

End address of a section (tag 0x16).

Equals(Box<Expression>, Box<Expression>)

Equality comparison (tag 0x20).

NotEquals(Box<Expression>, Box<Expression>)

Inequality comparison (tag 0x22).

LTE(Box<Expression>, Box<Expression>)

Less than or equal (tag 0x24).

LessThan(Box<Expression>, Box<Expression>)

Less than (tag 0x26).

GTE(Box<Expression>, Box<Expression>)

Greater than or equal (tag 0x28).

GreaterThan(Box<Expression>, Box<Expression>)

Greater than (tag 0x2A).

Add(Box<Expression>, Box<Expression>)

Addition (tag 0x2C).

Subtract(Box<Expression>, Box<Expression>)

Subtraction (tag 0x2E).

Multiply(Box<Expression>, Box<Expression>)

Multiplication (tag 0x30).

Divide(Box<Expression>, Box<Expression>)

Division (tag 0x32).

And(Box<Expression>, Box<Expression>)

Bitwise AND (tag 0x34).

Or(Box<Expression>, Box<Expression>)

Bitwise OR operator (tag 0x36).

XOR(Box<Expression>, Box<Expression>)

Bitwise XOR (tag 0x38).

LeftShift(Box<Expression>, Box<Expression>)

Left shift (tag 0x3A).

RightShift(Box<Expression>, Box<Expression>)

Right shift (tag 0x3C).

Mod(Box<Expression>, Box<Expression>)

Modulo (tag 0x3E).

Dashes(Box<Expression>, Box<Expression>)

Dashes operator (tag 0x40).

Revword(Box<Expression>, Box<Expression>)

Reverse word (tag 0x42).

Check0(Box<Expression>, Box<Expression>)

Check0 (tag 0x44).

Check1(Box<Expression>, Box<Expression>)

Check1 (tag 0x46).

BitRange(Box<Expression>, Box<Expression>)

Bit range extraction (tag 0x48).

ArshiftChk(Box<Expression>, Box<Expression>)

Arithmetic shift with check (tag 0x4A).

Trait Implementations

impl BinRead for Expression

type Args<'__binrw_generated_args_lifetime> = ()

The type used for the args parameter of read_args() and read_options().

fn read_options<R: Read + Seek>( __binrw_generated_var_reader: &mut R, __binrw_generated_var_endian: Endian, __binrw_generated_var_arguments: Self::Args<'_>, ) -> BinResult<Self>

Read Self from the reader using the given Endian and arguments.

fn read<R>(reader: &mut R) -> Result<Self, Error>

where R: Read + Seek, Self: ReadEndian, Self::Args<'a>: for<'a> Required,

Read Self from the reader using default arguments.

fn read_be<R>(reader: &mut R) -> Result<Self, Error>

where R: Read + Seek, Self::Args<'a>: for<'a> Required,

Read Self from the reader using default arguments and assuming big-endian byte order.

fn read_le<R>(reader: &mut R) -> Result<Self, Error>

where R: Read + Seek, Self::Args<'a>: for<'a> Required,

Read Self from the reader using default arguments and assuming little-endian byte order.

fn read_ne<R>(reader: &mut R) -> Result<Self, Error>

where R: Read + Seek, Self::Args<'a>: for<'a> Required,

Read T from the reader assuming native-endian byte order.

fn read_args<R>(reader: &mut R, args: Self::Args<'_>) -> Result<Self, Error>

where R: Read + Seek, Self: ReadEndian,

Read Self from the reader using the given arguments.

fn read_be_args<R>(reader: &mut R, args: Self::Args<'_>) -> Result<Self, Error>

where R: Read + Seek,

Read Self from the reader, assuming big-endian byte order, using the given arguments.

fn read_le_args<R>(reader: &mut R, args: Self::Args<'_>) -> Result<Self, Error>

where R: Read + Seek,

Read Self from the reader, assuming little-endian byte order, using the given arguments.

fn read_ne_args<R>(reader: &mut R, args: Self::Args<'_>) -> Result<Self, Error>

where R: Read + Seek,

Read T from the reader, assuming native-endian byte order, using the given arguments.

impl BinWrite for Expression

type Args<'__binrw_generated_args_lifetime> = ()

The type used for the args parameter of write_args() and write_options().

fn write_options<W: Write + Seek>( &self, __binrw_generated_var_writer: &mut W, __binrw_generated_var_endian: Endian, __binrw_generated_var_arguments: Self::Args<'_>, ) -> BinResult<()>

Write Self to the writer using the given Endian and arguments.

fn write<W>(&self, writer: &mut W) -> Result<(), Error>

where W: Write + Seek, Self: WriteEndian, Self::Args<'a>: for<'a> Required,

Write Self to the writer using default arguments.

fn write_be<W>(&self, writer: &mut W) -> Result<(), Error>

where W: Write + Seek, Self::Args<'a>: for<'a> Required,

Write Self to the writer assuming big-endian byte order.

fn write_le<W>(&self, writer: &mut W) -> Result<(), Error>

where W: Write + Seek, Self::Args<'a>: for<'a> Required,

Write Self to the writer assuming little-endian byte order.

fn write_ne<W>(&self, writer: &mut W) -> Result<(), Error>

where W: Write + Seek, Self::Args<'a>: for<'a> Required,

Write Self to the writer assuming native-endian byte order.

fn write_args<W>( &self, writer: &mut W, args: Self::Args<'_>, ) -> Result<(), Error>

where W: Write + Seek, Self: WriteEndian,

Write Self to the writer using the given arguments.

fn write_be_args<W>( &self, writer: &mut W, args: Self::Args<'_>, ) -> Result<(), Error>

where W: Write + Seek,

Write Self to the writer, assuming big-endian byte order, using the given arguments.

fn write_le_args<W>( &self, writer: &mut W, args: Self::Args<'_>, ) -> Result<(), Error>

where W: Write + Seek,

Write Self to the writer, assuming little-endian byte order, using the given arguments.

fn write_ne_args<W>( &self, writer: &mut W, args: Self::Args<'_>, ) -> Result<(), Error>

where W: Write + Seek,

Write Self to the writer, assuming native-endian byte order, using the given arguments.

impl Clone for Expression

fn clone(&self) -> Expression

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Expression

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Expression

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Expression

fn eq(&self, other: &Expression) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl ReadEndian for Expression

const ENDIAN: EndianKind

The endianness of the type.

impl WriteEndian for Expression

const ENDIAN: EndianKind

The endianness of the type.

impl StructuralPartialEq for Expression