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[elpa] externals/parser-generator cee559d 139/434: Added separate docume
From: |
ELPA Syncer |
Subject: |
[elpa] externals/parser-generator cee559d 139/434: Added separate document for lexical analysis documentation |
Date: |
Mon, 29 Nov 2021 15:59:27 -0500 (EST) |
branch: externals/parser-generator
commit cee559dbf6545b21e296dc53de92e15239cfb5af
Author: Christian Johansson <christian@cvj.se>
Commit: Christian Johansson <christian@cvj.se>
Added separate document for lexical analysis documentation
---
README.md | 2 +-
docs/Lexical-Analysis.md | 29 +++++++++++++++++++++++++++++
2 files changed, 30 insertions(+), 1 deletion(-)
diff --git a/README.md b/README.md
index 7a87dbe..fa23e93 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ This is just started, so most stuff are *WIP*.
## Lexical Analysis
-We use a regular-language based lexical analyzer that can be implemented by a
finite-state-machine (FSM). Set lexical analysis function by setting variable
`parser-generator-lex-analyzer--function`. Optionally set reset function by
setting variable `parser-generator-lex-analyzer--reset-function`. The lexical
analysis is indexed on variable `parser-generator-lex-analyzer--index`. All
parsers expect a list of tokens as response from lexical-analysis.
+We use a regular-language based lexical analyzer that can be implemented by a
finite-state-machine (FSM). Read more [here](docs/Lexical-Analysis.md).
### Peek next look-ahead
diff --git a/docs/Lexical-Analysis.md b/docs/Lexical-Analysis.md
new file mode 100644
index 0000000..d648f87
--- /dev/null
+++ b/docs/Lexical-Analysis.md
@@ -0,0 +1,29 @@
+# Lexical Analysis
+
+Set lexical analysis function by setting variable
`parser-generator-lex-analyzer--function`. Optionally set reset function by
setting variable `parser-generator-lex-analyzer--reset-function`. The lexical
analysis is indexed on variable `parser-generator-lex-analyzer--index`. All
parsers expect a list of tokens as response from lexical-analysis.
+
+## Example
+
+``` emacs-lisp
+(setq
+ parser-generator-lex-analyzer--function
+ (lambda (index length)
+ (let* ((string '(("a" 1 . 2) ("b" 2 . 3) ("c" 3 . 4) ("d" 4 . 5)))
+ (string-length (length string))
+ (max-index (+ index length))
+ (tokens))
+ (while (and
+ (< index string-length)
+ (< index max-index))
+ (push (nth index string) tokens)
+ (setq index (1+ index)))
+(nreverse tokens))))
+(parser-generator-lex-analyzer--reset)
+(setq parser-generator--look-ahead-number 1)
+ (should
+ (equal
+ '(("a" 1 . 2))
+ (parser-generator-lex-analyzer--peek-next-look-ahead)))
+```
+
+[Back to start](../../../)
- [elpa] externals/parser-generator 08b40cd 071/434: Updated header levels in README, (continued)
- [elpa] externals/parser-generator 08b40cd 071/434: Updated header levels in README, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator 5da1b28 079/434: Added TODO item, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator 79565f4 089/434: Fixed sorting of columns in GOTO-table, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator 043e375 095/434: Refactored LR-parser into stand-alone file, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator 4f81d98 107/434: Sorting each row in action-table, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator 62f54f1 110/434: Added failing unit test for e-free-first function, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator ee0ef5d 115/434: Added failing unit test for Algorithm 5.7, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator b0e9111 125/434: Started on lex-analyzer function, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator 0416ca9 134/434: Added information about lex-analyzer in README, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator b756e1a 135/434: Added example of parsing using LR algorithm, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator cee559d 139/434: Added separate document for lexical analysis documentation,
ELPA Syncer <=
- [elpa] externals/parser-generator de0ed95 142/434: Updated README.md, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator fa7089e 144/434: Re-factored lex analyzer function to not use length argument, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator 7eb9a4a 156/434: Fixed issue with indexing productions when they have SDT, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator 19667b3 158/434: Added failing unit test for translation, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator a8a4e7f 166/434: Minor fix, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator c0310bf 169/434: Added error-handling to lexical analyser, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator dfbd97f 184/434: More tweaking of f-set generation, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator 13d76ae 207/434: Passed tests for generating list permutations of length k, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator 06f8d37 211/434: More work on debugging LRk parser with k > 1, ELPA Syncer, 2021/11/29
- [elpa] externals/parser-generator 069bf34 209/434: Added test for new helper function list of symbol, ELPA Syncer, 2021/11/29