Struct FnType 

pub struct FnType {
    pub args: Arc<[FnArgType]>,
    pub vargs: Option<Type>,
    pub rtype: Type,
    pub constraints: Arc<RwLock<LPooled<Vec<(TVar, Type)>>>>,
    pub throws: Type,
    pub explicit_throws: bool,
    pub lambda_ids: Arc<RwLock<IntSet<LambdaId>>>,
}

Fields

args: Arc<[FnArgType]>

vargs: Option<Type>

rtype: Type

constraints: Arc<RwLock<LPooled<Vec<(TVar, Type)>>>>

throws: Type

explicit_throws: bool

lambda_ids: Arc<RwLock<IntSet<LambdaId>>>

accumulated set of all LambdaIds this type might represent (for late binding)

Implementations

impl FnType

pub fn resolve_tvars(&self) -> Self

Deep-clone with all bound TVars replaced by their concrete types. Constraints are emptied since all TVars are resolved.

pub fn unbind_tvars(&self)

pub fn constrain_known(&self)

pub fn reset_tvars(&self) -> Self

pub fn replace_tvars(&self, known: &AHashMap<ArcStr, Type>) -> Self

pub fn replace_auto_constrained(&self) -> Self

Replace automatically constrained type variables (those with underscore-prefixed names like '_23) with their constraint type. This is only useful for making nicer display types in IDEs and shells.

Ordering: when combining with Type::resolve_tvars to fully pretty a function signature, call replace_auto_constrained FIRST and resolve_tvars SECOND. resolve_tvars empties the constraint table, so reversing the order leaves the auto constraints with nothing to fold against.

pub fn has_unbound(&self) -> bool

pub fn bind_as(&self, t: &Type)

pub fn alias_tvars(&self, known: &mut AHashMap<ArcStr, TVar>)

pub fn unfreeze_tvars(&self)

pub fn collect_tvars(&self, known: &mut AHashMap<ArcStr, TVar>)

pub fn contains(&self, env: &Env, t: &Self) -> Result<bool>

pub fn merge_lambda_ids(&self, other: &Self)

Merge lambda_ids between two FnTypes during unification. Called after contains_int succeeds to track late-bound function identities.

pub fn check_contains(&self, env: &Env, other: &Self) -> Result<()>

pub fn sig_contains(&self, env: &Env, other: &Self) -> Result<bool>

Return true if function signatures are contained. This is contains, but does not allow labeled argument subtyping.

pub fn check_sig_contains(&self, env: &Env, other: &Self) -> Result<()>

pub fn sig_matches( &self, env: &Env, impl_fn: &Self, adts: &mut IntMap<AbstractId, Type>, ) -> Result<()>

pub fn map_argpos( &self, other: &Self, ) -> LPooled<AHashMap<ArcStr, (Option<usize>, Option<usize>)>>

pub fn scope_refs(&self, scope: &ModPath) -> Self

Trait Implementations

impl Clone for FnType

fn clone(&self) -> FnType

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FnType

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

Formats the value using the given formatter.

impl Default for FnType

fn default() -> Self

Returns the “default value” for a type.

impl Display for FnType

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

Formats the value using the given formatter.

impl Ord for FnType

fn cmp(&self, other: &Self) -> 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 FnType

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

fn partial_cmp(&self, other: &Self) -> 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 PrettyDisplay for FnType

fn fmt_pretty_inner(&self, buf: &mut PrettyBuf) -> Result

Do the actual pretty print. This should not be called directly, it will be called by fmt_pretty when we know it can’t fit on a single line.

fn fmt_pretty(&self, buf: &mut PrettyBuf) -> Result

This is the user facing fmt method, it will first try to format the expression on a single line, and if that is impossible it will call the pretty printer.

fn to_string_pretty(&self, limit: usize) -> LPooled<String>

Pretty print to a pooled string

impl Eq for FnType