Method without

winch/codegen/src/codegen/context.rs:197–218

Executes the provided function, guaranteeing that the specified set of registers, if any, remain unallocatable throughout the function's execution.

(
        &mut self,
        regs: impl IntoIterator<Item = &'r Reg> + Copy,
        masm: &mut M,
        mut f: F,
    )

    /// registers, if any, remain unallocatable throughout the function's
    /// execution.
    pub fn without<'r, T, M, F>(
        &mut self,
        regs: impl IntoIterator<Item = &'r Reg> + Copy,
        masm: &mut M,
        mut f: F,
    ) -> Result<T>
    where
        M: MacroAssembler,
        F: FnMut(&mut Self, &mut M) -> T,
    {
        for r in regs {
            self.reg(*r, masm)?;
        }

        let result = f(self, masm);

        for r in regs {
            self.free_reg(*r);
        }

        Ok(result)
    }

    /// Free the given register.
    pub fn free_reg(&mut self, reg: impl Into<Reg>) {