Struct IrHeader 

pub struct IrHeader {
    pub version: u16,
    pub flags: u16,
    pub source_hash: u64,
}

FMIR file header — the first 16 bytes of every FMIR module (a .ir file).

Layout (little-endian):

[0..4)   magic        – b"FMIR"
[4..6)   version      – u16
[6..8)   flags        – u16 (reserved; MUST be 0 — any non-zero bit is a
                       hard parse error, so unknown future extensions fail
                       closed instead of being silently mis-parsed. A new
                       flag bit therefore requires a coordinated forma-ir
                       release before the compiler may emit it.)
[8..16)  source_hash  – u64 (hash of original source; currently written as
                       0 by the JS compiler and not verified here)

Fields

version: u16

FMIR format version. Always IR_VERSION for a header that parsed.

flags: u16

Reserved bit field, validated to be zero (see the layout above).

source_hash: u64

Hash of the original source module. Written as 0 by the JS compiler today and not verified here.

Implementations

impl IrHeader

pub fn parse(data: &[u8]) -> Result<Self, IrError>

Parse an IrHeader from the first 16 bytes of data.

Trait Implementations

impl Clone for IrHeader

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for IrHeader

impl Debug for IrHeader

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

Formats the value using the given formatter.

impl Eq for IrHeader

impl PartialEq for IrHeader

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for IrHeader