Add support for "top of set" and "bottom of set" expressions

com.b2international.snomed.ecl.examples/Basic/Bottom.ecl

@@ -0,0 +1,7 @@
+/* 
+ * The expression constraint below evaluates to all concepts in the substrate that do not have a child or descendant within the sub-expression.
+ * In this example the "bottom" descendants are leafs of the sub-hierarchy starting with 224777007|Physical environment| and concepts like
+ * 224786002 |Open air environment| will not be present in the result set as they also have a child concept within the same sub-hierarchy. 
+ */
+
+!!< (<< 224777007|Physical environment|)

com.b2international.snomed.ecl.examples/Basic/Top.ecl

@@ -0,0 +1,7 @@
+/* 
+ * The expression constraint below evaluates to all concepts in the substrate that do not have a parent or ancestor within the sub-expression.
+ * In this example the "top" ancestors are 260787004|Physical object| and 373873005|Pharmaceutical / biologic product| as the concept is a 
+ * drug-device combination product.
+ */
+
+!!> (>> 411114003|Drug coated stent|)

com.b2international.snomed.ecl.ide/src-gen/com/b2international/snomed/ecl/ide/contentassist/antlr/EclParser.java

@@ -106,6 +106,8 @@ private static void init(ImmutableMap.Builder<AbstractElement, String> builder,
 			builder.put(grammarAccess.getParentOrSelfOfAccess().getGroup(), "rule__ParentOrSelfOf__Group__0");
 			builder.put(grammarAccess.getAncestorOfAccess().getGroup(), "rule__AncestorOf__Group__0");
 			builder.put(grammarAccess.getAncestorOrSelfOfAccess().getGroup(), "rule__AncestorOrSelfOf__Group__0");
+			builder.put(grammarAccess.getTopAccess().getGroup(), "rule__Top__Group__0");
+			builder.put(grammarAccess.getBottomAccess().getGroup(), "rule__Bottom__Group__0");
 			builder.put(grammarAccess.getMemberOfAccess().getGroup(), "rule__MemberOf__Group__0");
 			builder.put(grammarAccess.getMemberOfAccess().getGroup_1(), "rule__MemberOf__Group_1__0");
 			builder.put(grammarAccess.getMemberOfAccess().getGroup_1_1(), "rule__MemberOf__Group_1_1__0");
@@ -192,6 +194,8 @@ private static void init(ImmutableMap.Builder<AbstractElement, String> builder,
 			builder.put(grammarAccess.getParentOrSelfOfAccess().getConstraintAssignment_1(), "rule__ParentOrSelfOf__ConstraintAssignment_1");
 			builder.put(grammarAccess.getAncestorOfAccess().getConstraintAssignment_1(), "rule__AncestorOf__ConstraintAssignment_1");
 			builder.put(grammarAccess.getAncestorOrSelfOfAccess().getConstraintAssignment_1(), "rule__AncestorOrSelfOf__ConstraintAssignment_1");
+			builder.put(grammarAccess.getTopAccess().getConstraintAssignment_1(), "rule__Top__ConstraintAssignment_1");
+			builder.put(grammarAccess.getBottomAccess().getConstraintAssignment_1(), "rule__Bottom__ConstraintAssignment_1");
 			builder.put(grammarAccess.getMemberOfAccess().getRefsetFieldsAssignment_1_1_0(), "rule__MemberOf__RefsetFieldsAssignment_1_1_0");
 			builder.put(grammarAccess.getMemberOfAccess().getRefsetFieldsAssignment_1_1_1_1(), "rule__MemberOf__RefsetFieldsAssignment_1_1_1_1");
 			builder.put(grammarAccess.getMemberOfAccess().getConstraintAssignment_2(), "rule__MemberOf__ConstraintAssignment_2");

com.b2international.snomed.ecl.ide/src-gen/com/b2international/snomed/ecl/ide/contentassist/antlr/internal/InternalEcl.g

@@ -537,6 +537,56 @@ finally {
 	restoreStackSize(stackSize);
 }
 
+// Entry rule entryRuleTop
+entryRuleTop
+:
+{ before(grammarAccess.getTopRule()); }
+	 ruleTop
+{ after(grammarAccess.getTopRule()); } 
+	 EOF 
+;
+
+// Rule Top
+ruleTop 
+	@init {
+		int stackSize = keepStackSize();
+	}
+	:
+	(
+		{ before(grammarAccess.getTopAccess().getGroup()); }
+		(rule__Top__Group__0)
+		{ after(grammarAccess.getTopAccess().getGroup()); }
+	)
+;
+finally {
+	restoreStackSize(stackSize);
+}
+
+// Entry rule entryRuleBottom
+entryRuleBottom
+:
+{ before(grammarAccess.getBottomRule()); }
+	 ruleBottom
+{ after(grammarAccess.getBottomRule()); } 
+	 EOF 
+;
+
+// Rule Bottom
+ruleBottom 
+	@init {
+		int stackSize = keepStackSize();
+	}
+	:
+	(
+		{ before(grammarAccess.getBottomAccess().getGroup()); }
+		(rule__Bottom__Group__0)
+		{ after(grammarAccess.getBottomAccess().getGroup()); }
+	)
+;
+finally {
+	restoreStackSize(stackSize);
+}
+
 // Entry rule entryRuleMemberOf
 entryRuleMemberOf
 :
@@ -2649,9 +2699,21 @@ rule__SubExpressionConstraint__Alternatives
 	)
 	|
 	(
-		{ before(grammarAccess.getSubExpressionConstraintAccess().getEclFocusConceptParserRuleCall_8()); }
+		{ before(grammarAccess.getSubExpressionConstraintAccess().getTopParserRuleCall_8()); }
+		ruleTop
+		{ after(grammarAccess.getSubExpressionConstraintAccess().getTopParserRuleCall_8()); }
+	)
+	|
+	(
+		{ before(grammarAccess.getSubExpressionConstraintAccess().getBottomParserRuleCall_9()); }
+		ruleBottom
+		{ after(grammarAccess.getSubExpressionConstraintAccess().getBottomParserRuleCall_9()); }
+	)
+	|
+	(
+		{ before(grammarAccess.getSubExpressionConstraintAccess().getEclFocusConceptParserRuleCall_10()); }
 		ruleEclFocusConcept
-		{ after(grammarAccess.getSubExpressionConstraintAccess().getEclFocusConceptParserRuleCall_8()); }
+		{ after(grammarAccess.getSubExpressionConstraintAccess().getEclFocusConceptParserRuleCall_10()); }
 	)
 ;
 finally {
@@ -5289,6 +5351,114 @@ finally {
 }
 
 
+rule__Top__Group__0
+	@init {
+		int stackSize = keepStackSize();
+	}
+:
+	rule__Top__Group__0__Impl
+	rule__Top__Group__1
+;
+finally {
+	restoreStackSize(stackSize);
+}
+
+rule__Top__Group__0__Impl
+	@init {
+		int stackSize = keepStackSize();
+	}
+:
+(
+	{ before(grammarAccess.getTopAccess().getDBL_EM_GTTerminalRuleCall_0()); }
+	RULE_DBL_EM_GT
+	{ after(grammarAccess.getTopAccess().getDBL_EM_GTTerminalRuleCall_0()); }
+)
+;
+finally {
+	restoreStackSize(stackSize);
+}
+
+rule__Top__Group__1
+	@init {
+		int stackSize = keepStackSize();
+	}
+:
+	rule__Top__Group__1__Impl
+;
+finally {
+	restoreStackSize(stackSize);
+}
+
+rule__Top__Group__1__Impl
+	@init {
+		int stackSize = keepStackSize();
+	}
+:
+(
+	{ before(grammarAccess.getTopAccess().getConstraintAssignment_1()); }
+	(rule__Top__ConstraintAssignment_1)
+	{ after(grammarAccess.getTopAccess().getConstraintAssignment_1()); }
+)
+;
+finally {
+	restoreStackSize(stackSize);
+}
+
+
+rule__Bottom__Group__0
+	@init {
+		int stackSize = keepStackSize();
+	}
+:
+	rule__Bottom__Group__0__Impl
+	rule__Bottom__Group__1
+;
+finally {
+	restoreStackSize(stackSize);
+}
+
+rule__Bottom__Group__0__Impl
+	@init {
+		int stackSize = keepStackSize();
+	}
+:
+(
+	{ before(grammarAccess.getBottomAccess().getDBL_EM_LTTerminalRuleCall_0()); }
+	RULE_DBL_EM_LT
+	{ after(grammarAccess.getBottomAccess().getDBL_EM_LTTerminalRuleCall_0()); }
+)
+;
+finally {
+	restoreStackSize(stackSize);
+}
+
+rule__Bottom__Group__1
+	@init {
+		int stackSize = keepStackSize();
+	}
+:
+	rule__Bottom__Group__1__Impl
+;
+finally {
+	restoreStackSize(stackSize);
+}
+
+rule__Bottom__Group__1__Impl
+	@init {
+		int stackSize = keepStackSize();
+	}
+:
+(
+	{ before(grammarAccess.getBottomAccess().getConstraintAssignment_1()); }
+	(rule__Bottom__ConstraintAssignment_1)
+	{ after(grammarAccess.getBottomAccess().getConstraintAssignment_1()); }
+)
+;
+finally {
+	restoreStackSize(stackSize);
+}
+
+
 rule__MemberOf__Group__0
 	@init {
 		int stackSize = keepStackSize();
@@ -10796,6 +10966,36 @@ finally {
 	restoreStackSize(stackSize);
 }
 
+rule__Top__ConstraintAssignment_1
+	@init {
+		int stackSize = keepStackSize();
+	}
+:
+	(
+		{ before(grammarAccess.getTopAccess().getConstraintEclFocusConceptParserRuleCall_1_0()); }
+		ruleEclFocusConcept
+		{ after(grammarAccess.getTopAccess().getConstraintEclFocusConceptParserRuleCall_1_0()); }
+	)
+;
+finally {
+	restoreStackSize(stackSize);
+}
+
+rule__Bottom__ConstraintAssignment_1
+	@init {
+		int stackSize = keepStackSize();
+	}
+:
+	(
+		{ before(grammarAccess.getBottomAccess().getConstraintEclFocusConceptParserRuleCall_1_0()); }
+		ruleEclFocusConcept
+		{ after(grammarAccess.getBottomAccess().getConstraintEclFocusConceptParserRuleCall_1_0()); }
+	)
+;
+finally {
+	restoreStackSize(stackSize);
+}
+
 rule__MemberOf__RefsetFieldsAssignment_1_1_0
 	@init {
 		int stackSize = keepStackSize();
@@ -12185,6 +12385,10 @@ RULE_LT_EM : '<!';
 
 RULE_GT_EM : '>!';
 
+RULE_DBL_EM_LT : '!!<';
+
+RULE_DBL_EM_GT : '!!>';
+
 RULE_GTE : '>=';
 
 RULE_LTE : '<=';

com.b2international.snomed.ecl.ide/src-gen/com/b2international/snomed/ecl/ide/contentassist/antlr/internal/InternalEcl.tokens

@@ -1,15 +1,17 @@
 RULE_ACCEPTABLE_IN_KEYWORD=27
 RULE_ACTIVE_KEYWORD=34
 RULE_ALPHA=10
-RULE_CARET=61
+RULE_CARET=63
 RULE_CASE_SIGNIFICANCE_ID_KEYWORD=22
 RULE_COLON=53
 RULE_COMMA=7
 RULE_CONCEPT_SHORT_KEYWORD=11
 RULE_CONJUNCTION_KEYWORD=6
-RULE_CURLY_CLOSE=68
-RULE_CURLY_OPEN=67
+RULE_CURLY_CLOSE=70
+RULE_CURLY_OPEN=69
 RULE_DASH=8
+RULE_DBL_EM_GT=61
+RULE_DBL_EM_LT=62
 RULE_DBL_GT=60
 RULE_DBL_GT_EM=59
 RULE_DBL_LT=57
@@ -22,8 +24,8 @@ RULE_DIALECT_KEYWORD=33
 RULE_DIGIT=5
 RULE_DISJUNCTION_KEYWORD=46
 RULE_DOT=54
-RULE_DOUBLE_CURLY_CLOSE=72
-RULE_DOUBLE_CURLY_OPEN=71
+RULE_DOUBLE_CURLY_CLOSE=74
+RULE_DOUBLE_CURLY_OPEN=73
 RULE_EFFECTIVE_TIME_KEYWORD=26
 RULE_EQUAL=47
 RULE_EXACT_KEYWORD=37
@@ -32,7 +34,7 @@ RULE_FALSE_KEYWORD=20
 RULE_GT=49
 RULE_GTE=51
 RULE_GT_EM=58
-RULE_HASH=70
+RULE_HASH=72
 RULE_HISTORY_KEYWORD=21
 RULE_ID_KEYWORD=15
 RULE_KEYWORD=16
@@ -45,28 +47,28 @@ RULE_MATCH_KEYWORD=38
 RULE_MAX_KEYWORD=45
 RULE_MEMBER_SHORT_KEYWORD=13
 RULE_MIN_KEYWORD=43
-RULE_ML_COMMENT=74
+RULE_ML_COMMENT=76
 RULE_MODULEID_KEYWORD=32
 RULE_MOD_KEYWORD=44
 RULE_NOT_EQUAL=48
-RULE_PIPE_DELIMITED_STRING=73
+RULE_PIPE_DELIMITED_STRING=75
 RULE_PLUS=18
 RULE_PREFERRED_IN_KEYWORD=28
 RULE_REGEX_KEYWORD=39
 RULE_REVERSED=14
-RULE_ROUND_CLOSE=66
-RULE_ROUND_OPEN=65
+RULE_ROUND_CLOSE=68
+RULE_ROUND_OPEN=67
 RULE_SEMANTIC_TAG_KEYWORD=29
-RULE_SL_COMMENT=75
-RULE_SQUARE_CLOSE=63
-RULE_SQUARE_OPEN=62
+RULE_SL_COMMENT=77
+RULE_SQUARE_CLOSE=65
+RULE_SQUARE_OPEN=64
 RULE_STRING=4
 RULE_TERM_KEYWORD=40
-RULE_TO=69
+RULE_TO=71
 RULE_TRUE_KEYWORD=19
 RULE_TYPEID_KEYWORD=35
 RULE_TYPE_KEYWORD=41
 RULE_UNDERSCORE=9
 RULE_WILDCARD=17
 RULE_WILD_KEYWORD=42
-RULE_WS=64
+RULE_WS=66