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66 Commits

Author SHA1 Message Date
Zachary Snow 7e9fb3379c refactor internal frontend interface 
- add unified frontend configuration record to make adding future
  options easier
- use ExceptT throughout, rather than using runExceptT at internal
  boundaries
 2021-08-06 22:23:34 -06:00
Zachary Snow 91e3ac0fb1 normalize trailing whitespace in escaped identifiers 2021-07-08 17:17:45 -04:00
Zachary Snow 25fe57f75a fix lexing of whitespace in number literals 
In places where an optional space was previously allowed, allow any
number of arbitrary whitespace characters, in line with the spec and
other tools.
 2021-07-08 13:53:29 -04:00
Zachary Snow c39371c48a simplify and optimize lexing 2020-12-10 13:33:06 -07:00
Zachary Snow 82290b16ee simplify lexer character position lookup 2020-11-27 14:29:59 -07:00
Zachary Snow d88c516d33 enhanced handling of number literals 
- number literals are parsed rather than stored as strings
- fix array query functions used on non-trivial number literals
- more efficient expression simplification recursion
- expanded constant folding scenarios
 2020-07-12 15:06:27 -06:00
Zachary Snow 790312d25d vim modelines for Lex.x and Parse.y 2020-05-06 19:03:32 -04:00
Zachary Snow 3c08767b63 redesigned preprocessor and lexer 2020-02-06 23:33:13 -05:00
Zachary Snow 1a9068409e forbid illegal macro names 2020-02-01 16:42:25 -05:00
Zachary Snow 9f180f91e5 improve `line error message 2020-01-27 19:23:36 -05:00
Zachary Snow ad98c14547 fix handling of macros at EOF (resolves #62) 2020-01-27 19:18:58 -05:00
Zachary Snow cf4c2a5491 expanded support for macros in preprocessor directives 2020-01-14 23:19:39 -05:00
Zachary Snow ba79b17bd9 pragma and line directive validation 2019-12-09 21:45:11 -05:00
Zachary Snow 58ad1feab1 allow reading from stdin 2019-11-19 23:29:19 -05:00
Zachary Snow 336b180d74 lexer handles carriage returns (closes #51) 2019-10-19 13:27:29 -04:00
Zachary Snow fea5ff44eb coalesce tokens across nested macros 2019-10-11 22:53:08 -04:00
Zachary Snow d86f8535a0 support for begin_keywords directive 2019-10-11 19:32:10 -04:00
Zachary Snow b660cfbd4e allow tabs in preprocessor directives 2019-10-10 22:10:59 -04:00
Zachary Snow 167c65db11 pass through downstream compiler directives 2019-10-10 20:53:49 -04:00
Zachary Snow 6d79e0b491 updated number literals 2019-10-10 19:01:09 -04:00
Zachary Snow 149d16d8fc add support for `line directive 2019-10-10 19:00:49 -04:00
Zachary Snow 9880885412 Revert "allow escaped newline in macro arguments" 
This reverts commit ba7fbd5506.
 2019-10-09 00:36:23 -04:00
Zachary Snow a1735ffef7 fix lexing identifiers and numbers across macro boundaries 2019-10-06 15:16:48 -04:00
Zachary Snow ba7fbd5506 allow escaped newline in macro arguments 2019-10-03 23:29:49 -04:00
Zachary Snow ceb384f680 support multiline strings 2019-09-30 23:53:18 -04:00
Henner Zeller e2f044ec4a Place <file>:<line>:<col> first in an error message 
This is the same as most compilers (e.g. gcc and clang) but also
verilog tools (e.g. yosys) output error mesasge in a standardized form.

This form can immediately be parsed by IDE tools that can jumping
through a list of error messages, placing the cursor at the given
file position.

This change simply re-arranges the error message printing to conform to that
standard.

Signed-off-by: Henner Zeller <h.zeller@acm.org>
 2019-09-18 19:16:37 -04:00
Zachary Snow bdafb60dec lexical and parse errors print to stderr 2019-09-17 19:34:56 -04:00
Zachary Snow 2ca8a022ad support and conversion for -> and <-> 2019-09-15 13:55:40 -04:00
Zachary Snow f5d6683422 generalization of array dimension(s) system functions 2019-09-14 12:38:26 -04:00
Zachary Snow 6ddf782383 drop timeunit and timescale (closes #31) 2019-09-11 21:44:57 -04:00
Zachary Snow 33bea9e694 added remaining SV keywords 2019-09-04 21:02:02 -04:00
Zachary Snow 89e4f2a248 allow newlines before left paren of macro arguments 2019-08-11 17:55:42 -04:00
Zachary Snow 8a67a91166 added language support for (untagged) unions 2019-08-08 23:12:06 -04:00
Zachary Snow 90bc30d4be add --oneunit, which treats all input files as being part of one compilation unit 2019-08-05 22:00:04 -04:00
Zachary Snow d01df6110b preliminary language support for packages 2019-04-23 15:53:51 -04:00
Zachary Snow 369e9f2f19 updated Stack snapshot; handled pattern matching failure issues introduced in GHC 8.6 2019-04-16 15:52:38 -04:00
Zachary Snow 6d0f7dd0a7 significantly stronger support, and proper handling of assertions 2019-04-03 19:08:30 -04:00
Zachary Snow e79c95c5f0 some cleanup throughout the SystemVerilog module 2019-04-03 13:45:43 -04:00
Zachary Snow 39f377e022 lexer has useful tagging of tokens from a macro expansion 2019-04-03 13:05:33 -04:00
Zachary Snow 2f91e25aa2 more lexer tests 2019-04-03 00:16:30 -04:00
Zachary Snow a18270a3bd many lexer fixes 
- added support for macros with default arguments
- fixed bug where nested preprocessor conditionals would not be skipped
- macro expansion respects escaped quotation marks
- macro expansion considers whole identifiers, rather than substituting in wildly
 2019-04-02 23:05:42 -04:00
Zachary Snow c53b39319d added support and conversion handling of the $bits system function 
This also entailed further fleshing out the expression traversal helper
to cover expressions in generate blocks, which could, of course, use
$bits.
 2019-04-02 00:16:09 -04:00
Zachary Snow 317994ed3a faster lexing by storing tokens in reverse order 2019-03-30 03:21:56 -04:00
Zachary Snow a432d75939 additional SystemVerilog language support 
- unique0 and priority
- uniqueness on if statements
- preliminary discard-only parsing of assertions
- parameters with alias typenames
 2019-03-30 00:47:42 -04:00
Zachary Snow 17fd6f8ce5 proper handling of single-line comments in macro definitions 2019-03-29 19:08:44 -04:00
Zachary Snow c4449fd9ca better support for macros with arguments 2019-03-29 18:55:45 -04:00
Zachary Snow e49cb3536e beginning work to support macros with arguments; lex posn fix 2019-03-29 17:02:49 -04:00
Zachary Snow 5dc049b9e5 cleanup pass over Lex.x 2019-03-29 13:59:51 -04:00
Zachary Snow d578aee5d9 conflate the preprocessor and lexer 
This should make it much easier to add support for ``, `", macros with
arguments, etc., in the future.
 2019-03-29 05:33:17 -04:00
Zachary Snow e69895af54 initial setup for combining pre-processor and lexer 2019-03-29 01:10:46 -04:00