Struct ControlStack

pub struct ControlStack {
    stack: SmallVec<[ControlStackFrame; 32]>,
}

The control stack.

Fields

stack: SmallVec<[ControlStackFrame; 32]>

Stack frames for control flow.

The 32 is set arbitrarily, we can adjust it as we see fit.

Implementations

impl ControlStack

pub fn depth(&self) -> usize

The total depth of the control stack.

pub fn mark_else(&mut self) -> Result<ControlStackFrame>

Mark the else block of an if.

pub fn push(&mut self, frame: ControlStackFrame)

Push a control stack frame.

pub fn pop(&mut self) -> Result<ControlStackFrame>

Pop a control stack frame.

pub fn label_from_depth(&self, depth: u32) -> Result<u16>

Get the label of the control stack frame at given depth.

pub fn ret_ty(&self, depth: usize) -> Result<BlockType>

Get the return type of the control stack frame at given depth.

pub fn ty(&self, depth: usize) -> Result<ControlStackFrameType>

Get the type of the control stack frame at given depth.

Trait Implementations

impl Default for ControlStack

fn default() -> ControlStack

Returns the “default value” for a type.