add simple grammar rules and tests for simple cases

2020-01-23 23:00:16 +01:00
parent cb93670a58
commit 2bf8f95896
2 changed files with 36 additions and 1 deletions
--- a/grammar.y
+++ b/grammar.y
@@ -1,8 +1,17 @@
 class Query
    rule
-        expression:
+        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]} }
 end

+---- header
+  require_relative 'lexer'
+
 ---- inner
  def parse(input)
    scan_str(input)