diff options
Diffstat (limited to 'std/default')
-rw-r--r-- | std/default/format.pk | 4 | ||||
-rw-r--r-- | std/default/iterators.pk | 4 | ||||
-rw-r--r-- | std/default/options.pk | 24 | ||||
-rw-r--r-- | std/default/results.pk | 27 |
4 files changed, 33 insertions, 26 deletions
diff --git a/std/default/format.pk b/std/default/format.pk index ee8997d..b117632 100644 --- a/std/default/format.pk +++ b/std/default/format.pk @@ -7,8 +7,8 @@ pub type Display = interface str(Self): str dbg(Self): str -## The Debug interface. Broadly implemented for every type with compiler magic, -## types can (and should) override the generic implementations. +## The Debug interface. Broadly implemented for every type with compiler magic. +## Types can (and should) override the generic implementations. pub type Debug = interface dbg(Self): str diff --git a/std/default/iterators.pk b/std/default/iterators.pk index f97c61a..f7e4972 100644 --- a/std/default/iterators.pk +++ b/std/default/iterators.pk @@ -21,11 +21,11 @@ pub func get[T](self: Iter[T], at: uint): Option[T] # todo: implement iter[T](self: ...): Iter[T] funcs # todo: efficient functional methods -## The Peek interface. Any type implementing Iter, `peek`, and `peek_nth` is peekable. +## The Peek interface. Any type implementing `Iter`, `peek`, and `peek_nth` is peekable. pub type Peek[T] = interface next(mut Self): Option[T] peek(mut Self): Option[T] - peek_nth(mut Self, n: uint): Option[T] + peek_nth(mut Self, int): Option[T] # todo: implement peek[T](self: Iter[T]): Peek[T] # todo: implement Peekable struct diff --git a/std/default/options.pk b/std/default/options.pk index 397a8f3..fb696ba 100644 --- a/std/default/options.pk +++ b/std/default/options.pk @@ -1,12 +1,12 @@ ## std/options: Optional types. ## This module is imported by default. -import std/format +use std.format ## The `Option` type. ## A type that represents either the presence or absence of a value. pub type Option[T] = union - Some: T + Some(T) None ## Checks if a type is present within an `Option` type. @@ -43,7 +43,7 @@ pub func flatmap[T, U](self: Option[T], fn: T -> Option[U]): Option[U] = else: None ## Converts from Option[Option[T]] to Option[T]. -pub func flatten[T](self: Option[Option[T]]): Option[T] = # todo: better name? +pub func flatten[T](self: Option[Option[T]]): Option[T] = match self of Some(Some(x)): Some(x) @@ -55,19 +55,25 @@ pub func get_or[T](self: Option[T], default: T): T = if self of Some(x): x else: default ## Directly accesses the inner value. Throws an exception if None. -pub yeet func `!`[T](self: Option[T]): T = +pub func ![T](self: Option[T]): T = if self of Some(x): x else: raise Exception # todo: syntax?? ## Indirect access. Propagates `None`. -pub macro `?`[T](self: Option[T]) = +## Parsed by compiler magic. +pub macro ?[T](self: Option[T]) = quote: - match self + match `self` of Some(x): x of None: return None +## Syntactic sugar for optional type declarations. +pub macro ?(T: type) = + quote: + Option[`T`] + ## Overloads the `==` operation for use on Options. -pub func `==`[T](a, b: Option[T]): bool = +pub func ==[T](a, b: Option[T]): bool = match (a, b) of (Some(x), Some(y)): x == y @@ -77,9 +83,9 @@ pub func `==`[T](a, b: Option[T]): bool = ## Overloads the `str()` function for use on Options. pub func str[T](self: Option[T]): str = if self of Some(x): - fmt("some({})", x.str) + fmt("Some({})", x.str) else: - "none" + "None" examples: let x = Some(42) diff --git a/std/default/results.pk b/std/default/results.pk index 8faf0c0..8e21234 100644 --- a/std/default/results.pk +++ b/std/default/results.pk @@ -1,13 +1,12 @@ ## std/results: Result types. ## This module is imported by default. -import std/[options, format] +use std[options, format] -## The Result type. -## A type that represents either success or failure. +## The Result type. Represents either success or failure. pub type Result[T, E] = union - Okay: T - Error: E + Okay(T) + Error(E) ## The Err interface. Useful for dynamically dispatching errors. pub type Err = interface @@ -52,7 +51,7 @@ pub func map[T, E, U](self: Result[T, E], fn: T -> U): Result[U, E] = pub func map_err[T, E, F](self: Result[T, E], fn: E -> F): Result[T, F] = match self of Error(e): - Error(e.fn) + Error(fn(e)) of Okay(x): Okay(x) @@ -92,25 +91,27 @@ pub func transpose[T, E](self: Option[Result[T, E]], error: E): Result[Option[T] pub func get_or[T, E](self: Result[T, E], default: T): T = if self of Okay(x): x else: default + ## Directly accesses the inner value. Throws an exception if `Error`. -pub yeet func `!`[T, E](self: Result[T, E]): T = +pub func ![T, E](self: Result[T, E]): T = match self of Okay(x): x - of Error(e): raise Exception(e) # todo: syntax?? -pub yeet func get_err[T, E](self: Result[T, E]): E = + of Error(e): raise e +## Directly accesses the inner error. Throws an exception of type T if `Okay`. +pub func get_err[T, E](self: Result[T, E]): E = match self of Error(e): e - of Okay(x): raise Exception(x) # todo: syntax?? + of Okay(x): raise x ## Indirect access. Propagates `Error`. -macro `?`[T, E](self: Result[T, E]) = +pub macro ?[T, E](self: Result[T, E]) = quote: - match self + match `self` of Okay(x): x of Error(e): return Error(e) ## Overloads the `==` operation for use on Results. -pub func `==`[T, E, F](a: Result[T, E], b: Result[T, F]): bool = +pub func ==[T, E, F](a: Result[T, E], b: Result[T, F]): bool = match (a, b) of (Okay(x), Okay(y)): x == y |