First implementation og nql grammar treetop

.ruby-version

@@ -1 +1 @@
-ruby-2.3.0
+ruby-2.4.5

lib/rasti/db/nql/grammar.treetop

@@ -0,0 +1,98 @@
+module Rasti
+  module DB
+    module NQL
+
+      grammar Filter
+
+        rule sentence
+          optional_space sentence:proposition optional_space <Sentence>
+        end
+
+        rule proposition
+          left:conjunction mandatory_space 'OR' mandatory_space right:proposition <Disjunction> /
+          conjunction
+        end
+
+        rule conjunction
+          left:statement mandatory_space 'AND' mandatory_space right:conjunction <Conjunction> /
+          statement
+        end
+
+        rule statement
+          parenthesis_sentence /
+          comparison
+        end
+
+        rule parenthesis_sentence
+          '(' optional_space sentence optional_space ')' <Parens>
+        end
+
+        rule comparison
+          left:field optional_space comparator:comparator optional_space right:basic <Comparison>
+        end
+
+        rule field
+          tables:(field_name '.')* name:field_name <Field>
+        end
+
+        rule comparator
+          '>='/
+          '<='/
+          '>' /
+          '<' /
+          '!='/
+          '=' /
+          ':' /
+          '!:'/
+          '~'
+        end
+
+        rule basic
+          integer /
+          float /
+          boolean /
+          time /
+          string
+        end
+
+        rule optional_space
+          [\s\t\n]*
+        end
+
+        rule mandatory_space
+          [\s\t\n]+
+        end
+
+        rule field_name
+          [a-z]+
+        end
+
+        rule string
+          value: character+ <StringConstant>
+        end
+
+        rule character 
+          [a-zA-ZÁÀÄÂÃÅĀĂǍáàäâãåāăǎÉÈËÊĒĔĖĚéèëêēĕėěÍÌÏÎĨĬǏíìïîĩĭǐÓÒÖÔÕŌŎŐǑóòöôõōŏőǒÚÙÜÛŨŪŬŮŰǓúùüûũūŭůűǔÑñçÇ%&@#\+\-_=ß'\?!$\*\/]
+        end
+
+        rule boolean
+          value:('true'i / 'false'i) <BooleanConstant>
+        end
+
+        rule float
+          value:(digit+ ('.' digit+)?) <FloatConstant>
+        end
+
+        rule integer
+          value:digit+ <IntegerConstant>
+        end
+
+        rule digit
+          [0-9]
+        end
+
+      end
+
+    end
+  end
+end