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We remove the camlp4 compatibility layer, and try to clean up
most structures. `parsing/compat` is gone.
We added some documentation to the lexer/parser interfaces that are
often obscured by module includes.
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For legacy reasons, pretty printing required to provide a "tag"
interpretation function `pp_tag`. However such function was not of much
use as the backends (richpp and terminal) hooked at the `Format.tag`
level.
We thus remove this unused indirection layer and annotate expressions
with their `Format` tags.
This is a step towards moving the last bit of terminal code out of the
core system.
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This is what has always been used, so it doesn't represent a functional
change.
This is just a preliminary patch, but many more possibilities could be
done wrt tags.
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No functional change.
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Was a bug introduced in 0ad6edc1.
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This was for the translator and is not relevant for the beautifier.
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Was PR#319: More error tagging, try to fix bug 5135
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+ a few improvements on 5f1dd4c40 (lexing of { and }).
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This is useful for debugging purposes.
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The current tag system in `Pp` is generic, which implies we must choose
a tagging function when calling a printer.
For console printing there is a single choice, thus this commits adds it
a few missing cases.
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This covers the case e.g. of "xₚ" (until the table of unicode
characters is upgraded!).
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`Notation ".a" := nat.' was accepted and used for printing but not
recognized in parsing. Now it does. Other examples in test-suite.
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The warning was pointless since the notation was accepted and parsed
anyway.
We now treat unrecognized unicode characters like ordinary
undefined tokens (e.g. "#" in a bare Coq).
For instance, "aₚ", or ".ₚ", or "?ₚ" now fail with "Undefined token"
rather than "Unsupported Unicode character".
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Given the current style in flags.mli no reason to have a function.
A deeper question is why a global flag is needed, in particular the use
in `interp/constrextern.ml` seems strange, the condition in the lexer
should be looked at and I'm not sure about `printing/`.
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8a8caba3).
- Adding cLexer.current_file to the lexer state, i.e. making it a
component of the type "coq_parsable" of lexer state (it was
forgotten in b8ae2de5 and 8a8caba3).
- Inlining save_translator/restore_translator which have now lost most
of their substance.
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It was not used any more by coqdoc since b8194b22 (Dec 2010).
The table is now only part of the lexer function closure
(and only in the camlp5 case).
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done by the Ppcmd_comment token) and so that lexing/parsing
side-effects are collected at the same place, i.e. in CLexer.
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the state of parsable streams, so that different lexing/parsing
processes can be started independently without conflicting.
Note however that these different lexing/parsing processes cannot be
run concurrently as they still work on the same piece of global memory
(i.e. calls to entry_parse should remain atomic). To go further, one
would typically need to be able to functionally pass the lexing state
to each call to the lexer.
Note that currently the beautifier is also running in the context of a
lexer/parser state (for the mapping of location to comments).
In particular, this fixes #5102 (parsing/lexing of bullets depending on
the lexing state which was global).
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This reverts commit 466b7e69e49a5f4bba36b834a2e046f120ece07c.
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That way, bullet detection no longer depends on a global variable
indicating whether a line is starting. This causes a small change in the
recognized language. Before the commit, "--++" was recognized as a bullet
"--" followed by a keyword "++" when at the start of a line; now it is
always recognized as a keyword "--++".
This also fixes a bug in Tok.to_string as a side-effect.
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In some cases prior to this patch, there were two cases for the same
error function, one taking a location, the other not.
We unify them by using an option parameter, in the line with recent
changes in warnings and feedback.
This implies a bit of clean up in some places, but more importantly, is
the preparation for subsequent patches making `Loc.location` opaque,
change that could be use to improve modularity and allow a more
functional implementation strategy --- for example --- of the
beautifier.
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This was implemented in anticipation of a part of PR#164 that we decided not to
merge.
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On the user side, coqtop and coqc take a list of warning names or categories
after -w. No prefix means activate the warning, a "-" prefix means deactivate
it, and "+" means turn the warning into an error. Special categories include
"all", and "default" which contains the warnings enabled by default.
We also provide a vernacular Set Warnings which takes the same flags as argument.
Note that coqc now prints warnings.
The name and category of a warning are printed with the warning itself.
On the developer side, Feedback.msg_warning is still accessible, but the
recommended way to print a warning is in two steps:
1) create it by:
let warn_my_warning =
CWarnings.create ~name:"my-warning" ~category:"my-category"
(fun args -> Pp.strbrk ...)
2) print it by:
warn_my_warning args
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Coq locations already had support for this, but were containing dummy
information. We now don't need anymore to reconstruct this information by
browsing the file when printing an error message or enriching exceptions on the
fly.
It also became easier to interface with Coq since locations emitted by the
lexer now always contain full information.
On the API side, Loc.represent disappeared and Loc.t is now exposed as record.
It is less error-prone than manipulating a tuple of 5 integers. Also,
Loc.create takes 5 arguments instead of 3 and a pair.
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This patch splits pretty printing representation from IO operations.
- `Pp` is kept in charge of the abstract pretty printing representation.
- The `Feedback` module provides interface for doing printing IO.
The patch continues work initiated for 8.5 and has the following effects:
- The following functions in `Pp`: `pp`, `ppnl`, `pperr`, `pperrnl`,
`pperr_flush`, `pp_flush`, `flush_all`, `msg`, `msgnl`, `msgerr`,
`msgerrnl`, `message` are removed. `Feedback.msg_*` functions must be
used instead.
- Feedback provides different backends to handle output, currently,
`stdout`, `emacs` and CoqIDE backends are provided.
- Clients cannot specify flush policy anymore, thus `pp_flush` et al are
gone.
- `Feedback.feedback` takes an `edit_or_state_id` instead of the old
mix.
Lightly tested: Test-suite passes, Proof General and CoqIDE seem to work.
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Emilio Jesus Gallego Arias
Pierre-Marie Pédrot
Hugo Herbelin
Maxime Dénès
Guillaume Melquiond