Adriaan van Os wrote:
Frank Heckenbach wrote:
In the ISO Pascal Standard Report (Jensen, Wirth, third edition) I read at the end of Section 5:
Comment = { "{" | "(*" ) { CommentElement } ( "}" | "*)" ) .
A CommentElement is either an end of line or any sequence of characters not containing "}" or "*)".
Notes: { ...*) and (* ...} are valid comments. The comment {(*) is equivalent to the comment {(}.
This means that {{} is a valid comment, but {}} isn't, according to the standard. Several other Pascal compilers, however, only allow (*.. { .. } .. *) or { .. (* .. *) .. }. But, as Frank noted, you can use the --nested-comments option in GPC to get similar behaviour.
This would be `--no-mixed-comments' which is set (i.e. "no") by default, except in standard Pascal modes.
I see. Then --nested-comments --no-mixed-comments would be the ideal default for --mac-pascal.
Does Mac Pascal allow real nested comments, i.e. `{ ... { ... } ... }'? (Then it might be the first compiler I hear of that does so, apart from GPC. I had even considered dropping that option, OTOH, it's quite useful for embedding TeX etc. in comments.)
And `--nested-comments --no-mixed-comments' would also mean comments such as `{ ... { ... (* ... } ... }'. Is it so?
Frank