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linguist/samples/Golo/context-decorator.golo
2014-09-17 13:59:02 +02:00

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# Copyright 2012-2014 Institut National des Sciences Appliquées de Lyon (INSA-Lyon)
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
module samples.ContextDecorator
import gololang.Decorators
let myContext = defaultContext():
count(0):
define("entry", |this, args| {
this: count(this: count() + 1)
println("hello:" + this: count())
return args
}):
define("exit", |this, result| {
require(result >= 3, "wrong value")
println("goobye")
return result
}):
define("catcher", |this, e| {
println("Caught " + e)
throw e
}):
define("finallizer", |this| {println("do some cleanup")})
@withContext(myContext)
function foo = |a, b| {
println("Hard computation")
return a + b
}
function main = |args| {
println(foo(1,2))
println("====")
println(withContext(myContext)(|a| -> 2*a)(3))
println("====")
try {
println(foo(1, 1))
} catch (e) { }
}