Re^5: $1 not "freezing" in an addition

[ikegami]

lvalue context has nothing to do with scalar/void/list context.

lvalue and lvalue context are not the same thing.

An lvalue context is a context where an expression must produce an lvalue. In contrast, an rvalue context is a context where code may produce an rvalue.

Example of lvalue contexts:

• Sub arguments.
• The arguments to some functions.
• The operand of the reference operator.
• The LHS operand of assignment operators.
• foreach's list.

When using $1,$2... in an expression ( anything you can legally say in a spot where a value is required ) you should quote to stringify and preserve the current value.

No, it's stupid to do $x = "$1";.

...though I admit the lvalue context is not sufficient (e.g. $bar = "$1" + foo();).

[Anonymous Monk]

... An lvalue context is a context where an expression must produce an lvalue ...

That is confusing, the $1 in  bar = "$1" + foo(); is not a location where you can assign (use = ) a value , what?

No, it's stupid to do $x = "$1";

Eh?

[ikegami]

I don't understand your questions.