Struct WasmGlobal 

pub struct WasmGlobal {
    pub index: u32,
    pub init: Option<GlobalInit>,
    pub mutable: bool,
    pub slot_bytes: u32,
    pub float_or_v128: bool,
}

A WASM global’s declaration — its initial value and mutability (#237). Needed so the native-pointer ABI can recognize a global whose initializer is a linear-memory address (e.g. $__stack_pointer = 65536) and make it __synth_wasm_data-relative, rather than reading it from an R9 globals table the self-contained drop-in object can’t rely on.

Fields

index: u32

Global index (defined globals; imported globals are not counted here).

init: Option<GlobalInit>

The captured constant initializer (#237/#649): i32.const or i64.const. Float/non-const init exprs decode to None — see GlobalInit.

mutable: bool

Whether the global is mutable.

slot_bytes: u32

#643: byte width of the global’s storage slot, from its declared value type — 4 for i32/f32, 8 for i64/f64, 16 for v128. The globals table is laid out by SUMMING these widths (not index * 4): an i64 global needs room for both words, and every later global’s offset shifts with it.

float_or_v128: bool

RQ-59-GLOBALINIT (#1052): declared content type is f32/f64/v128. Those globals’ initializers are deliberately uncaptured (init: None) AND their access is the GI-FPU-001 (#369) / #680 loud-skip lane, so a dropped initializer is unobservable through generated code. An INTEGER global with init: None (a non-const init expr) has no such cover — the relocatable-path init-materialization guard needs to tell the two apart, and slot_bytes alone cannot (4 = i32 OR f32).

Trait Implementations

impl Clone for WasmGlobal

fn clone(&self) -> WasmGlobal

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WasmGlobal

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

Formats the value using the given formatter.