Methods cannot be invoked from within lambdas or blocks
Reported by Philipp Pirozhkov | February 23rd, 2009 @ 02:18 PM
class Foo def a(x, lambda)
['inside a', x].join(' ').puts()
lambda()
['exiting a', x].join(' ').puts()
def b(y)
['inside b', y].join(' ').puts()
def z
'z'.puts()
a('do something', fun do
b('ccc')
)
'exit z'.puts()
works fine, but uncommenting breaks everything changing 'class' to 'module' fixes everything
stacktrace: exception error: no function clause matching
reia_r2e:forms({method_call,13,
{identifier,13,b},
[{string,13,"ccc"}],
{identifier,13,'___instance_variables_0'},
{identifier,13,'___instance_variables_1'}})
in function reia_r2e:'-forms/1-lc$^5/1-7-'/1 in call from reia_r2e:forms/1 in call from reia_r2e:list_to_forms/2 in call from reia_r2e:list_to_forms/2 in call from reia_methods:method_invocation/4 in call from reia_methods:transform/2 in call from reia_visitor:transform/3
Comments and changes to this ticket
-
Philipp Pirozhkov February 23rd, 2009 @ 02:20 PM
class Foo def a(x, lambda) ['inside a', x].join(' ').puts() lambda() ['exiting a', x].join(' ').puts() def b(y) ['inside b', y].join(' ').puts() def z 'z'.puts() a('do something', fun do b('ccc') ) 'exit z'.puts() -
Tony Arcieri February 28th, 2009 @ 11:43 AM
- Title changed from “class method is not seen inside a block” to “Methods cannot be invoked from within lambdas or blocks”
Lambdas should be able to access (but not mutate) the outer scope and hidden ivar state.
I'll add support for this, with the provision that if a method is invoked which mutates the state it will crash the object.
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Reia a dynamic scripting language for the Erlang virtual machine (BEAM)
Tony Arcieri