From 392dc9f58260156245279cf078a1ad14d413828e Mon Sep 17 00:00:00 2001
From: Tom Gillespie <tgbugs@gmail.com>
Date: Thu, 13 Apr 2017 15:15:27 -0700
Subject: [PATCH] bbp-lang experimental impl of shortnames for bbp

---
 bbp-lang.rkt   | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++
 bbp-parser.rkt | 22 ++++++++++++++
 2 files changed, 103 insertions(+)
 create mode 100644 bbp-lang.rkt
 create mode 100644 bbp-parser.rkt

diff --git a/bbp-lang.rkt b/bbp-lang.rkt
new file mode 100644
index 00000000..f45a83e7
--- /dev/null
+++ b/bbp-lang.rkt
@@ -0,0 +1,81 @@
+#lang racket/base
+
+(require "bbp-parser.rkt")
+(require brag/support)
+(require (for-syntax racket/base syntax/parse))
+
+(define (read-syntax path port)
+  (define parse-tree (parse path (make-tokenizer port)))
+  (define module-datum `(module bbp-mod "bbp-expander.rkt"
+                          ,parse-tree))
+  (datum->syntax #f module-datum))
+(provide read-syntax)
+
+(define-lex-abbrev
+  mtypes
+  (:or
+   "PC"
+   "BPC"
+   "IPC"
+   "NPC"
+   "SPC"
+   "NTPC"
+   "STPC"
+   "TTPC"
+   "TTPCLB"
+   "TTPCEB"
+   "TPCLB"
+   "TPCEB"
+   "UPC"
+   "BTC"
+   "BPC"
+   "ChC"
+   "DBC"
+   "DAC"
+   "HAC"
+   "LAC"
+   "SAC"
+   "MC"
+   "NGC"
+   "NGCDA"
+   "NGCSA"
+   "BC"
+   "SBC"
+   "LBC"
+   "NBC"
+   "SS"
+   "BC"
+   "BP"
+   "LBC"
+   "NBC"
+   "SBC"
+   )) ; this is infuriating check a macro
+(define-lex-abbrev layer (:or "L1" "L2" "L23" "L3" "L4" "L5" "L6"))
+(define-lex-abbrev init (:or "b" "c" "d"))
+(define-lex-abbrev sust (:or "NAC" "AC" "STUT" "IR"))
+(define-lex-abbrev species (:or "Rat" "Mouse"))
+(define-lex-abbrev region (:or "S1"))
+(define-lex-abbrev projection (:or "L1P" "L3P" "L4P")) ; not wokring :/
+
+(define (make-tokenizer port)
+  (define (next-token)
+    (define bbp-lexer
+      (lexer
+       [(eof) eof]
+       [layer (token 'LAYER lexeme)]
+       [mtypes (token 'M-TYPE lexeme)]
+       [init (token 'INIT lexeme)]
+       [sust (token 'SUST lexeme)]
+       [species (token 'SPECIES lexeme)]
+       [region (token 'REGION lexeme)]
+       [projection (token 'PROJECTION lexeme)] ; a problem
+       ["_" (token 'UNDERSCORE)]
+       ))
+    (bbp-lexer port))
+  next-token)
+
+(apply-tokenizer-maker make-tokenizer "L1_PC")
+(parse-to-datum (apply-tokenizer-maker make-tokenizer "L1_PC"))
+(parse-to-datum (apply-tokenizer-maker make-tokenizer "L23_PC"))
+(parse-to-datum (apply-tokenizer-maker make-tokenizer "PC"))
+(parse-to-datum (apply-tokenizer-maker make-tokenizer "Rat_S1_L4_PC_cAC_L3P"))
diff --git a/bbp-parser.rkt b/bbp-parser.rkt
new file mode 100644
index 00000000..0d7fada4
--- /dev/null
+++ b/bbp-parser.rkt
@@ -0,0 +1,22 @@
+#lang brag
+
+short-name : base
+base : (m-type | e-type) | reps
+reps : (m-type | e-type | location | projection | species) more*
+more : underscore reps
+
+e-type : init sust
+init : INIT
+sust : SUST
+
+location : layer | region
+layer : LAYER
+region : REGION
+
+underscore : UNDERSCORE
+m-type : M-TYPE
+
+projection : PROJECTION
+
+species : SPECIES
+