Initial commit

lib/parser-parser-part/grammar.y

@@ -0,0 +1,26 @@
+class Query
+    prechigh
+        left OPERATOR_NOT
+        left OPERATOR_AND
+        left OPERATOR_OR
+      preclow
+    rule
+        target: expression
+                | /* none */ { result = 0 }
+
+          expression: TERM_WITHOUT_QUOTES                                       { result = {:DEFAULT_COLUMN => val[0]} }
+          |     TERM_WITH_QUOTES                                                { result = {:DEFAULT_COLUMN => val[0]} }
+          |     TERM_WITHOUT_QUOTES COLON TERM_WITHOUT_QUOTES                   { result = {val[0] => val[2]} }
+          |     TERM_WITHOUT_QUOTES COLON TERM_WITH_QUOTES                      { result = {val[0] => val[2]} }
+          |     expression OPERATOR_OR expression                               { result = {:OPERATOR_OR => [val[0], val[2]]} }
+          |     expression OPERATOR_AND expression                              { result = {:OPERATOR_AND => [val[0], val[2]]} }
+          |     L_BRACKET expression R_BRACKET                                  { result = val[1] }
+end
+
+---- header
+  require_relative 'lexer'
+
+---- inner
+  def parse(input)
+    scan_str(input)
+  end