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Auto merge of #8854 - KiChjang:undefined-as-missing, r=frewsxcv

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Treat 'undefined' passed to optional JS arguments as missing

@frewsxcv please don't hurt me for this.

I've added an AND condition to check whether the value being passed is undefined while checking whether the argument exists at all. Essentially, this is now treating undefined arguments the same as missing arguments.

Fixes #8813.
Fixes #6558.

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This commit is contained in:
bors-servo 2015-12-13 10:41:56 +05:30
commit 8bab1cd7a4
15 changed files with 8 additions and 62 deletions
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10
components/script/dom/bindings/codegen/CodegenRust.py
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@ -1142,7 +1142,6 @@ class CGArgumentConverter(CGThing):
"argc": argc,
"args": args
}
condition = string.Template("${index} < ${argc}").substitute(replacer)
replacementVariables = {
"val": string.Template("${args}.get(${index})").substitute(replacer),
@ -1164,17 +1163,18 @@ class CGArgumentConverter(CGThing):
if not argument.variadic:
if argument.optional:
condition = "{args}.get({index}).is_undefined()".format(**replacer)
if argument.defaultValue:
assert default
template = CGIfElseWrapper(condition,
CGGeneric(template),
CGGeneric(default)).define()
CGGeneric(default),
CGGeneric(template)).define()
else:
assert not default
declType = CGWrapper(declType, pre="Option<", post=">")
template = CGIfElseWrapper(condition,
CGGeneric("Some(%s)" % template),
CGGeneric("None")).define()
CGGeneric("None"),
CGGeneric("Some(%s)" % template)).define()
else:
assert not default