diff options
| author | Alasdair Armstrong | 2018-01-25 00:30:24 +0000 |
|---|---|---|
| committer | Alasdair Armstrong | 2018-01-25 00:30:24 +0000 |
| commit | d87d4ad3a6d2ec2804cb7b20128fecb6d9df4e6e (patch) | |
| tree | 76a85742db61e8f4dcac8471c6c0856603453543 /src/parse_ast.ml | |
| parent | 10e2be330c14aaddbd8ada6b6ce8a8a63c7d605e (diff) | |
Add simple conditional processing and file include
Can now use C-style include declarations to include files within other sail files. This is done in such a way that all the location information is preserved in error messages. As an example:
$include "aarch64/prelude.sail"
$define SYM
$ifndef SYM
$include <../util.sail>
$endif
would include the file aarch64/prelude.sail relative to the file where the include is contained. It then defines a symbol SYM and includes another file if it is not defined. The <../util.sail> include will be accessed relative to $SAIL_DIR/lib, so $SAIL_DIR/lib/../util.sail in this case.
This can be used with the standard C trick of
$ifndef ONCE
$define ONCE
val f : unit -> unit
$endif
so no matter how many sail files include the above file, the valspec for f will only appear once.
Currently we just have $include, $define, $ifdef and $ifndef (with $else and $endif). We're using $ rather than # because # is already used in internal identifiers, although this could be switched.
Diffstat (limited to 'src/parse_ast.ml')
| -rw-r--r-- | src/parse_ast.ml | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/parse_ast.ml b/src/parse_ast.ml index 362333f3..5eb8038a 100644 --- a/src/parse_ast.ml +++ b/src/parse_ast.ml @@ -507,6 +507,7 @@ def = (* Top-level definition *) | DEF_default of default_typing_spec (* default kind and type assumptions *) | DEF_scattered of scattered_def (* scattered definition *) | DEF_reg_dec of dec_spec (* register declaration *) + | DEF_pragma of string * string * l | DEF_internal_mutrec of fundef list |