std: switch from chr to char

6 files changed, 33 insertions, 28 deletions

diff --git a/std/ast.pk b/std/ast.pk
index 4b8a783..21a5569 100644
--- a/std/ast.pk
+++ b/std/ast.pk
@@ -1,13 +1,14 @@
 ## std.ast: Exposes the AST for building and operating on with macros.
 
 ## The `Expr` type represents the abstract syntax tree of Puck itself.
-## It notably lacks type information.
-## It is, however, syntactically correct-by-construction.
+## It notably lacks type information. It is also not necessarily syntactically
+## correct-by-construction: Cond, Try, and Match expressions must have at least
+## one branch in their branches (yet this is not expressible here).
 pub type Expr = union
   Ident(string)
   Number(int)
   Float(float)
-  Char(chr)
+  Char(char)
   String(str)
   Struct(list[(field: str, value: Expr)])
   Tuple(list[(field: str?, value: Expr)])
@@ -29,17 +30,25 @@ pub type Expr = union
     params: list[(id: Pattern, kind: Type?)],
     kind: Type?,
     body: list[Expr])
-  TypeDecl(public: bool, id: str, generics: list[str], alias: Type)
-  Module(public: bool, id: str, body: list[Expr])
+  TypeDecl(
+    public: bool,
+    id: str,
+    generics: list[str],
+    body: Type)
+  Module(
+    public: bool,
+    id: str,
+    generics: list[str],
+    body: list[Expr])
   Use(path: str)
   Call(id: str, params: list[Expr])
   Cond(
     branches: list[(cond: Expr, body: list[Expr])],
-    else_body: list[Expr]?)
+    else_body: list[Expr])
   Try(
     try_body: list[Expr],
     catches: list[(exceptions: list[str], body: list[Expr])],
-    finally_body: list[Expr]?)
+    finally_body: list[Expr])
   Match(
     item: ref Expr,
     branches: list[(pattern: Pattern, guard: Expr?, body: list[Expr])])
@@ -54,15 +63,11 @@ pub type Type = ref union
   Int(size: uint)
   Dec(size: uint)
   Float(size: uint)
-  String
   Func(from: list[Type], to: Type)
   Struct(list[(id: str, kind: Type)])
   Tuple(list[(id: str?, kind: Type)])
   Union(list[(id: str, kind: Type)])
-  Class( # todo: generics
-    funcs: list[(id: str, from: list[Type], to: Type?)]
-    for_type: Type?
-  )
+  Class(list[(id: str, from: list[Type], to: Type?)])
   Array(size: uint, kind: Type)
   List(Type)
   Slice(Type) # todo: plus ownership
@@ -76,7 +81,7 @@ pub type Type = ref union
 
 pub type Pattern = union
   Ident(str)
-  Number(int), Float(float), Char(chr), String(str)
+  Number(int), Float(float), Char(char), String(str)
   Struct(name: str, params: list[Pattern])
   Tuple(list[Pattern])
   List(list[Pattern])
diff --git a/std/prelude/io.pk b/std/prelude/io.pk
index 026d12a..d44f403 100644
--- a/std/prelude/io.pk
+++ b/std/prelude/io.pk
@@ -27,7 +27,7 @@ pub func read(file: File): str? =
 pub func lines(file: File): Iter[str] =
   ...
 
-pub func chars(file: File): Iter[chr] =
+pub func chars(file: File): Iter[char] =
   ...
 
 pub func exists(file: File): bool =
diff --git a/std/prelude/iterators.pk b/std/prelude/iterators.pk
index 1403b55..1e60379 100644
--- a/std/prelude/iterators.pk
+++ b/std/prelude/iterators.pk
@@ -159,7 +159,7 @@ pub func unzip[T, U](self: Iter[(T, U)]): (Iter[T], Iter[U])
 
 # equivalent of collect. useful for type conversion
 pub func to[T](self: LazyIter[T]): list[T]
-pub func to(self: LazyIter[chr]): str
+pub func to(self: LazyIter[char]): str
 
 pub type BoundIter[T] = class
   next(mut Self): T?
diff --git a/std/prelude/lists.pk b/std/prelude/lists.pk
index 1bce693..c4b8739 100644
--- a/std/prelude/lists.pk
+++ b/std/prelude/lists.pk
@@ -7,8 +7,8 @@
 @[opaque] # opaque on a struct tells us raw field access breaks invariants.
 pub type list[T] = struct
   data: ptr T
-  capacity: int
-  length: int
+  capacity: uint
+  length: uint
 
 ## A transparent, common alias for a list of bytes.
 pub type bytes = list[byte]
diff --git a/std/prelude/numbers.pk b/std/prelude/numbers.pk
index 801591a..aad747c 100644
--- a/std/prelude/numbers.pk
+++ b/std/prelude/numbers.pk
@@ -65,10 +65,10 @@ pub type dec128
 pub type byte = u8
 ## A primitive char type. 4 bytes wide.
 ## These represent distinct Unicode characters, and are useful with `str`.
-pub type chr = u32
+pub type char = u32
 
 ## Get the underlying length of a char, in bytes. 1-4.
-pub func len(self: chr): uint =
+pub func len(self: char): uint =
   ...
 
 ## The IEEE floating point value of *Not a Number*.
diff --git a/std/prelude/strings.pk b/std/prelude/strings.pk
index a8c72fb..5c71047 100644
--- a/std/prelude/strings.pk
+++ b/std/prelude/strings.pk
@@ -22,7 +22,7 @@ pub func len(self: lent str): uint =
   res
 
 ## Pushes a character to the end of a mutable string.
-pub func push(self: mut str, val: chr) =
+pub func push(self: mut str, val: char) =
   self.data.push(val.byte) # todo: obsolete by from/to conversion??
 
 ## Pushes an owned string to the end of a mutable string.
@@ -34,29 +34,29 @@ pub func push(self: mut str, val: str) =
 ## SAFETY: We return early upon an empty string.
 ## And decrement by one char for a non-empty string.
 @[safe]
-pub func pop(self: mut str): chr? =
+pub func pop(self: mut str): char? =
   let char = self.chars.rev.next?
   self.data.set_len(self.len - char.len) # this is normally unsafe.
   Some(char)
 
 ## Returns the character at the provided index, if it exists.
-pub func get(self: str, i: uint): chr? =
+pub func get(self: str, i: uint): char? =
   ...
 
 ## Sets the character at the provided index, if it exists.
 ## As strings are packed, this may call str.grow and reallocate.
 ## oh fuck we have to insert + remove anyway
-pub func set(self: mut str, i: uint, val: chr) =
+pub func set(self: mut str, i: uint, val: char) =
   ...
 
 ## Inserts a character at an arbitrary position within a string.
 ## Panics on failure. (todo: can we do better?)
-pub func insert(self: mut str, i: uint, val: chr) =
+pub func insert(self: mut str, i: uint, val: char) =
   ...
 
 ## Removes and returns a character at an arbitrary position within a string.
 ## Panics on failure. (todo: can we do better?)
-pub func remove(self: mut str, i: uint): chr =
+pub func remove(self: mut str, i: uint): char? =
   ...
 
 ## Syntactic sugar for string appending.
@@ -70,9 +70,9 @@ pub func &(a: str, b: str): str =
 
 ## Conversion from a string to a list of bytes. Zero-cost.
 pub func to(self: str): list[byte] = self.data
-## Conversion from a str to a list[chr]. Reallocates.
-pub func to(self: str): list[chr] =
-  var res: list[chr]
+## Conversion from a str to a list[char]. Reallocates.
+pub func to(self: str): list[char] =
+  var res: list[char]
   for char in self do res.push(char)
   res
 ## Conversion from a char to an array of bytes. Zero-cost.