Enum ConstValue 

#[non_exhaustive]
pub enum ConstValue<'a> {
    Empty,
    Null,
    I2(i16),
    I4(i32),
    R4(f32),
    R8(f64),
    Cy(i64),
    Date(f64),
    Bstr(&'a [u8]),
    Error(i32),
    Bool(bool),
    I1(i8),
    UI1(u8),
    UI2(u16),
    UI4(u32),
    I8(i64),
    UI8(u64),
    Int(i32),
    UInt(u32),
    Void,
    Hresult(i32),
    Decimal(&'a [u8]),
    Filetime(u64),
    Raw {
        vt: u16,
        bits: i32,
    },
}

A decoded constant value from a VAR_CONST variable record or custom data.

Values are either packed inline in the OffsValue field (small positive integers) or stored in the custom data segment.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Empty

No value / empty (VT_EMPTY, 0).

Null

Null (VT_NULL, 1).

I2(i16)

A 16-bit signed integer (VT_I2, 2).

I4(i32)

A 32-bit signed integer (VT_I4, 3).

R4(f32)

A 32-bit float (VT_R4, 4).

R8(f64)

A 64-bit float (VT_R8, 5).

Cy(i64)

A currency value (VT_CY, 6) stored as a 64-bit integer scaled by 10000.

Date(f64)

A date (VT_DATE, 7) stored as a 64-bit float (OLE Automation date).

Bstr(&'a [u8])

A byte-string (VT_BSTR, 8), borrowed from the file data.

Error(i32)

An OLE error code (VT_ERROR, 10).

Bool(bool)

A boolean (VT_BOOL, 11).

I1(i8)

A signed byte (VT_I1, 16).

UI1(u8)

An unsigned byte (VT_UI1, 17).

UI2(u16)

An unsigned 16-bit integer (VT_UI2, 18).

UI4(u32)

An unsigned 32-bit integer (VT_UI4, 19).

I8(i64)

A 64-bit signed integer (VT_I8, 20).

UI8(u64)

A 64-bit unsigned integer (VT_UI8, 21).

Int(i32)

A signed integer (VT_INT, 22).

UInt(u32)

An unsigned integer (VT_UINT, 23).

Void

Void (VT_VOID, 24).

Hresult(i32)

An HRESULT (VT_HRESULT, 25).

Decimal(&'a [u8])

A decimal value (VT_DECIMAL, 14), raw 16 bytes.

Filetime(u64)

A FILETIME value (VT_FILETIME, 64).

Raw

A value whose VARTYPE code has no dedicated variant above.

The vt field is the 16-bit VARTYPE code (e.g. VT_DISPATCH = 9, VT_VARIANT = 12). The bits field is the first 4 bytes of the value payload; for wider types the remaining bytes are not captured.

Fields

vt: u16

The VARTYPE code.

bits: i32

The first 4 bytes of the value payload, read as a little-endian i32.

Trait Implementations

impl<'a> Clone for ConstValue<'a>

fn clone(&self) -> ConstValue<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for ConstValue<'a>

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

Formats the value using the given formatter.

impl Display for ConstValue<'_>

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

Formats the value using the given formatter.