Struct CallFlags

pub struct CallFlags { /* private fields */ }

Flags used to change the behaviour of seal_call and seal_delegate_call.

Implementations

impl CallFlags

pub const FORWARD_INPUT: CallFlags

Forward the input of current function to the callee.

Supplied input pointers are ignored when set.

Note

A forwarding call will consume the current contracts input. Any attempt to access the input after this call returns will lead to [Error::InputForwarded]. It does not matter if this is due to calling call_data_copy or trying another forwarding call. Consider using Self::CLONE_INPUT in order to preserve the input.

pub const CLONE_INPUT: CallFlags

Identical to Self::FORWARD_INPUT but without consuming the input.

This adds some additional weight costs to the call.

Note

This implies Self::FORWARD_INPUT and takes precedence when both are set.

pub const TAIL_CALL: CallFlags

Do not return from the call but rather return the result of the callee to the callers caller.

Note

This makes the current contract completely transparent to its caller by replacing this contracts potential output by the callee ones. Any code after seal_call can be safely considered unreachable.

pub const ALLOW_REENTRY: CallFlags

Allow the callee to reenter into the current contract.

Without this flag any reentrancy into the current contract that originates from the callee (or any of its callees) is denied. This includes the first callee: You cannot call into yourself with this flag set.

Note

For seal_delegate_call should be always unset, otherwise [Error::InvalidCallFlags] is returned.

pub const READ_ONLY: CallFlags

Indicates that the callee is restricted from modifying the state during call execution, equivalent to Ethereum’s STATICCALL.

Note

For seal_delegate_call should be always unset, otherwise [Error::InvalidCallFlags] is returned.

pub const fn empty() -> CallFlags

Returns an empty set of flags.

pub const fn all() -> CallFlags

Returns the set containing all flags.

pub const fn bits(&self) -> u32

Returns the raw value of the flags currently stored.

pub const fn from_bits(bits: u32) -> Option<CallFlags>

Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.

pub const fn from_bits_truncate(bits: u32) -> CallFlags

Convert from underlying bit representation, dropping any bits that do not correspond to flags.

pub const unsafe fn from_bits_unchecked(bits: u32) -> CallFlags

Convert from underlying bit representation, preserving all bits (even those not corresponding to a defined flag).

Safety

The caller of the bitflags! macro can chose to allow or disallow extra bits for their bitflags type.

The caller of from_bits_unchecked() has to ensure that all bits correspond to a defined flag or that extra bits are valid for this bitflags type.

pub const fn is_empty(&self) -> bool

Returns true if no flags are currently stored.

pub const fn is_all(&self) -> bool

Returns true if all flags are currently set.

pub const fn intersects(&self, other: CallFlags) -> bool

Returns true if there are flags common to both self and other.

pub const fn contains(&self, other: CallFlags) -> bool

Returns true if all of the flags in other are contained within self.

pub fn insert(&mut self, other: CallFlags)

Inserts the specified flags in-place.

pub fn remove(&mut self, other: CallFlags)

Removes the specified flags in-place.

pub fn toggle(&mut self, other: CallFlags)

Toggles the specified flags in-place.

pub fn set(&mut self, other: CallFlags, value: bool)

Inserts or removes the specified flags depending on the passed value.

pub const fn intersection(self, other: CallFlags) -> CallFlags

Returns the intersection between the flags in self and other.

Specifically, the returned set contains only the flags which are present in both self and other.

This is equivalent to using the & operator (e.g. ops::BitAnd), as in flags & other.

pub const fn union(self, other: CallFlags) -> CallFlags

Returns the union of between the flags in self and other.

Specifically, the returned set contains all flags which are present in either self or other, including any which are present in both (see Self::symmetric_difference if that is undesirable).

This is equivalent to using the | operator (e.g. ops::BitOr), as in flags | other.

pub const fn difference(self, other: CallFlags) -> CallFlags

Returns the difference between the flags in self and other.

Specifically, the returned set contains all flags present in self, except for the ones present in other.

It is also conceptually equivalent to the “bit-clear” operation: flags & !other (and this syntax is also supported).

This is equivalent to using the - operator (e.g. ops::Sub), as in flags - other.

pub const fn symmetric_difference(self, other: CallFlags) -> CallFlags

Returns the symmetric difference between the flags in self and other.

Specifically, the returned set contains the flags present which are present in self or other, but that are not present in both. Equivalently, it contains the flags present in exactly one of the sets self and other.

This is equivalent to using the ^ operator (e.g. ops::BitXor), as in flags ^ other.

pub const fn complement(self) -> CallFlags

Returns the complement of this set of flags.

Specifically, the returned set contains all the flags which are not set in self, but which are allowed for this type.

Alternatively, it can be thought of as the set difference between Self::all() and self (e.g. Self::all() - self)

This is equivalent to using the ! operator (e.g. ops::Not), as in !flags.

Trait Implementations

impl Binary for CallFlags

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

Formats the value using the given formatter.

impl BitAnd for CallFlags

fn bitand(self, other: CallFlags) -> CallFlags

Returns the intersection between the two sets of flags.

type Output = CallFlags

The resulting type after applying the & operator.

impl BitAndAssign for CallFlags

fn bitand_assign(&mut self, other: CallFlags)

Disables all flags disabled in the set.

impl BitOr for CallFlags

fn bitor(self, other: CallFlags) -> CallFlags

Returns the union of the two sets of flags.

type Output = CallFlags

The resulting type after applying the | operator.

impl BitOrAssign for CallFlags

fn bitor_assign(&mut self, other: CallFlags)

Adds the set of flags.

impl BitXor for CallFlags

fn bitxor(self, other: CallFlags) -> CallFlags

Returns the left flags, but with all the right flags toggled.

type Output = CallFlags

The resulting type after applying the ^ operator.

impl BitXorAssign for CallFlags

fn bitxor_assign(&mut self, other: CallFlags)

Toggles the set of flags.

impl Clone for CallFlags

fn clone(&self) -> CallFlags

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for CallFlags

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

Formats the value using the given formatter.

impl Extend<CallFlags> for CallFlags

fn extend<T>(&mut self, iterator: T)

where T: IntoIterator<Item = CallFlags>,

Extends a collection with the contents of an iterator.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl FromIterator<CallFlags> for CallFlags

fn from_iter<T>(iterator: T) -> CallFlags

where T: IntoIterator<Item = CallFlags>,

Creates a value from an iterator.

impl Hash for CallFlags

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl LowerHex for CallFlags

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

Formats the value using the given formatter.

impl Not for CallFlags

fn not(self) -> CallFlags

Returns the complement of this set of flags.

type Output = CallFlags

The resulting type after applying the ! operator.

impl Octal for CallFlags

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

Formats the value using the given formatter.

impl Ord for CallFlags

fn cmp(&self, other: &CallFlags) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for CallFlags

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for CallFlags

fn partial_cmp(&self, other: &CallFlags) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Sub for CallFlags

fn sub(self, other: CallFlags) -> CallFlags

Returns the set difference of the two sets of flags.

type Output = CallFlags

The resulting type after applying the - operator.

impl SubAssign for CallFlags

fn sub_assign(&mut self, other: CallFlags)

Disables all flags enabled in the set.

impl UpperHex for CallFlags

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

Formats the value using the given formatter.

impl Copy for CallFlags

impl Eq for CallFlags

impl StructuralPartialEq for CallFlags