On the syntax edge

[Alexis Nikichine]

I have mistakenly left in my code an uncommented url:


http://site.for.this.function.domain/folder/file.html
function theFunction()
{
// do something.
}

Fortunately, everything went fine:

* The ugly part, with many undeclared identifiers, was commented out
by the //.
* http: was interpreted as something, strange.

Actually, it may have something to do with the syntax with which object
literals can be declared in javascript, but I can't understand why. It
seems that I can prefix most, if not all, lines of code, with any
prefix, followed by a colon, without any noticeable effect.

Any insight on this welcome; anyway, this had to be shared


Alexis

 

[Martin Honnen]

I have mistakenly left in my code an uncommented url:


http://site.for.this.function.domain/folder/file.html

Fortunately, everything went fine:

* The ugly part, with many undeclared identifiers, was commented out
by the //.
* http: was interpreted as something, strange.

It is a label, see
<http://web.archive.org/web/20031209...00/javascript/1.5/reference/stmt.html#1018088>

 

[Michael Winter]

http://site.for.this.function.domain/folder/file.html
function theFunction()
{
// do something.
}
[snip]

Any insight on this welcome; anyway, this had to be shared

As Martin said, the "http:" will be (initially) interpreted as a labelled
statement. The syntax is simple:

LabelledStatement:
Identifier : Statement

where "Identifier" is any name that conforms to identifier rules, and
"Statement" is any legal statement.

However, a function declaration is not a legal statement so a strict
parser would raise an error when it encountered the theFunction
declaration.

Mike