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|
'For now, arithmetic is not sensitive to whitespace:
:p 1.0+1.0
> 2.
:p 1.0 +1.0
> 2.
:p 1.0+ 1.0
> 2.
:p 1.0 + 1.0
> 2.
:p 1.0-1.0
> 0.
:p 1.0 -1.0
> 0.
:p 1.0- 1.0
> 0.
:p 1.0 - 1.0
> 0.
'Applying a function to a negative literal thus requires parentheses.
f = \x. x + 10.
:p f -1.0 -- parses as (-) f (-1.0)
> Type error:
> Expected: ((x:Float32) -> Float32)
> Actual: Float32
>
> :p f -1.0 -- parses as (-) f (-1.0)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
:p f (-1.0)
> 9.
:p (
1
+
2
)
> 3
:p
xs = [1,2,3]
for i.
if xs[i] > 1
then 0
else 1
> [1, 0, 0]
:p
run_state 5 \ref.
n = get ref
for_ i:(Fin n).
ref := get ref + 1
> ((), 10)
-- Check that a syntax error in a funDefLet doesn't try to reparse the
-- whole definition as something it's not.
def frob(x:Int, y:Int) -> + =
> Parse error:66:29:
> |
> 66 | def frob(x:Int, y:Int) -> + =
> | ^
> unexpected '='
> expecting name or symbol name
-- Check that indented blocks have to actually be indented.
for i.
i
> Parse error:77:1:
> |
> 77 | i
> | ^
> expecting end of line or space
def (foo + bar) : Int = 6
> Parse error:85:6:
> |
> 85 | def (foo + bar) : Int = 6
> | ^
> unexpected 'f'
> expecting symbol name
'Data definitions allow but do not require type / kind annotations
data MyPair1(a, b) = MkPair1(a, b)
data MyPair2(a:Type, b:Type) = MkPair2(x:a, y:b)
'Data definitions allow interleaving arguments and class constraints
(regression test for Issue 1015)
data TableInType(n|Ix, a, table:(n=>a)) =
MkTableInType -- Doesn't store any data except in the type!
'Left arrow <- desugars to a continuation lambda
(feature test for Issue 1137)
:p
x <- with_state 0
x := 4
get x
> 4
'Check that we get reasonably helpful error messages if we try to write param lists
without parens or with whitespace before the parens.
data MyMaybe a =
MyNothing
> Parse error:119:14:
> |
> 119 | data MyMaybe a =
> | ^
> unexpected 'a'
> expecting '=' or parameter list in parentheses (without preceding whitespace)
data MyMaybe (a) =
MyNothing
> Parse error:128:14:
> |
> 128 | data MyMaybe (a) =
> | ^
> unexpected '('
> expecting '=' or parameter list in parentheses (without preceding whitespace)
data MyMaybe(a) =
MyNothing
MyJust a
> Parse error:139:10:
> |
> 139 | MyJust a
> | ^^
> unexpected "a<newline>"
> expecting end of input, end of line, or optional parameter list
data MyMaybe(a) =
MyNothing
MyJust (a)
> Parse error:149:10:
> |
> 149 | MyJust (a)
> | ^^
> unexpected "(a"
> expecting end of input, end of line, or optional parameter list
interface MyClass a
pass
> Parse error:157:19:
> |
> 157 | interface MyClass a
> | ^
> expecting parameter list in parentheses (without preceding whitespace)
instance MyClass Int
pass
> Parse error:165:18:
> |
> 165 | instance MyClass Int
> | ^
> expecting '(' (without preceding whitespace)
instance MyClass (Int)
pass
> Parse error:173:18:
> |
> 173 | instance MyClass (Int)
> | ^
> expecting '(' (without preceding whitespace)
def myFunction (x) = ()
> Parse error:181:16:
> |
> 181 | def myFunction (x) = ()
> | ^
> expecting parameter list in parentheses (without preceding whitespace)
def myFunction x = ()
> Parse error:189:16:
> |
> 189 | def myFunction x = ()
> | ^
> expecting parameter list in parentheses (without preceding whitespace)
|
