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ModuleCriterion.lua
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ModuleCriterion.lua
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local ModuleCriterion, parent = torch.class("nn.ModuleCriterion", "nn.Criterion")
function ModuleCriterion:__init(criterion, inputModule, targetModule, castTarget)
self.inputModule = inputModule
self.targetModule = targetModule
self.castTarget = (castTarget == nil) and true or castTarget
if self.inputModule then
local params = self.inputModule:parameters()
if params and #params > 0 then
print"Warning: nn.ModuleCriterion doesn't support parameter updates"
end
end
self.criterion = criterion
end
function ModuleCriterion:updateOutput(input, target)
if self.inputModule then
self.input = self.inputModule:forward(input)
end
if self.targetModule then
self.target = self.targetModule:forward(target)
end
self.output = self.criterion:forward(self.input or input, self.target or target)
return self.output
end
function ModuleCriterion:updateGradInput(input, target)
self.gradInput = self.criterion:backward(self.input or input, self.target or target)
if self.inputModule then
self.gradInput = self.inputModule:backward(input, self.gradInput)
end
return self.gradInput
end
function ModuleCriterion:type(type)
if self.inputModule then
self.inputModule:type(type)
end
if self.castTarget and self.targetModule then
self.targetModule:type(type)
end
self.criterion:type(type)
return parent.type(self, type)
end