grammar.rb in rley-0.5.11

- old
+ new
@@ -4,28 +4,56 @@
   ########################################
   # Work in progress.
   # This is a very partial grammar of SRL.
   # It will be expanded with the coming versions of Rley
   builder = Rley::Syntax::GrammarBuilder.new do
+    add_terminals('LPAREN', 'RPAREN', 'COMMA')
     add_terminals('DIGIT_LIT', 'INTEGER', 'LETTER_LIT')
+    add_terminals('LITERALLY', 'STRING_LIT')
     add_terminals('UPPERCASE', 'LETTER', 'FROM', 'TO')
-    add_terminals('DIGIT', 'NUMBER')
+    add_terminals('DIGIT', 'NUMBER', 'ANY', 'NO')
+    add_terminals('CHARACTER', 'WHITESPACE', 'ANYTHING')
+    add_terminals('TAB', 'BACKSLASH', 'NEW', 'LINE')
+    add_terminals('OF', 'ONE')
     add_terminals('EXACTLY', 'TIMES', 'ONCE', 'TWICE')
     add_terminals('BETWEEN', 'AND', 'OPTIONAL', 'OR')
     add_terminals('MORE', 'NEVER', 'AT', 'LEAST')
 
-    # For the moment one focuses on quantifier syntax only...
-    rule 'srl' => 'term'
+    rule 'srl' => 'pattern'
+    rule 'pattern' => %w[pattern COMMA quantifiable]
+    rule 'pattern' => %w[pattern quantifiable]
+    rule 'pattern' => 'quantifiable'
+    rule 'quantifiable' => 'term'
+    rule 'quantifiable' => %w[term quantifier]
     rule 'term' => 'atom'
-    rule 'term' => %w[atom quantifier]
+    rule 'term' => 'alternation'
+    rule 'term' => 'grouping'
     rule 'atom' => 'letter_range'
     rule 'atom' => 'digit_range'
+    rule 'atom' => 'character_class'
+    rule 'atom' => 'special_char'
+    rule 'atom' => 'literal'
     rule 'letter_range' => %w[LETTER FROM LETTER_LIT TO LETTER_LIT]
     rule 'letter_range' => %w[UPPERCASE LETTER FROM LETTER_LIT TO LETTER_LIT]
     rule 'letter_range' => 'LETTER'
     rule 'letter_range' => %w[UPPERCASE LETTER]
     rule 'digit_range' => %w[digit_or_number FROM DIGIT_LIT TO DIGIT_LIT]
-    rule 'digit_range' => 'digit_or_number'    
+    rule 'digit_range' => 'digit_or_number'
+    rule 'character_class' => %w[ANY CHARACTER]
+    rule 'character_class' => %w[NO CHARACTER]
+    rule 'character_class' => 'WHITESPACE'
+    rule 'character_class' => %w[NO WHITESPACE]
+    rule 'character_class' => 'ANYTHING'
+    rule 'character_class' => %w[ONE OF STRING_LIT]
+    rule 'special_char' => 'TAB'
+    rule 'special_char' => 'BACKSLASH'
+    rule 'special_char' => %w[NEW LINE]
+    rule 'literal' => %w[LITERALLY STRING_LIT]
+    rule 'alternation' => %w[ANY OF LPAREN alternatives RPAREN]
+    rule 'alternatives' => %w[alternatives COMMA quantifiable]
+    rule 'alternatives' => %w[alternatives quantifiable]
+    rule 'alternatives' => 'quantifiable'
+    rule 'grouping' => %w[LPAREN pattern RPAREN]
     rule 'quantifier' => 'ONCE'
     rule 'quantifier' => 'TWICE'
     rule 'quantifier' => %w[EXACTLY count TIMES]
     rule 'quantifier' => %w[BETWEEN count AND count times_suffix]
     rule 'quantifier' => 'OPTIONAL'
\ No newline at end of file