Parse less than expressions

4 files changed, 16 insertions, 6 deletions

diff --git a/src/main/java/org/shedlang/compiler/ast/untyped/UntypedBinaryOperator.java b/src/main/java/org/shedlang/compiler/ast/untyped/UntypedBinaryOperator.java
index 53e3cbd1..17fcd6ac 100644
--- a/src/main/java/org/shedlang/compiler/ast/untyped/UntypedBinaryOperator.java
+++ b/src/main/java/org/shedlang/compiler/ast/untyped/UntypedBinaryOperator.java
@@ -3,6 +3,7 @@ package org.shedlang.compiler.ast.untyped;
 public enum UntypedBinaryOperator {
     ADD,
     EQUALS,
+    LESS_THAN,
     NOT_EQUAL,
     SUB
 }
diff --git a/src/main/java/org/shedlang/compiler/parser/OperatorPrecedence.java b/src/main/java/org/shedlang/compiler/parser/OperatorPrecedence.java
index 6bd5319a..f34fa552 100644
--- a/src/main/java/org/shedlang/compiler/parser/OperatorPrecedence.java
+++ b/src/main/java/org/shedlang/compiler/parser/OperatorPrecedence.java
@@ -2,8 +2,9 @@ package org.shedlang.compiler.parser;
 
 public enum OperatorPrecedence {
     EQUALS(1),
-    ADD(2),
-    CALL(3);
+    RELATIONAL(2),
+    ADD(3),
+    CALL(4);
 
     private final int precedence;
 
diff --git a/src/main/java/org/shedlang/compiler/parser/Parser.java b/src/main/java/org/shedlang/compiler/parser/Parser.java
index a6b2e1ff..b09ff4db 100644
--- a/src/main/java/org/shedlang/compiler/parser/Parser.java
+++ b/src/main/java/org/shedlang/compiler/parser/Parser.java
@@ -345,6 +345,7 @@ public class Parser {
         new MemberAccessParser(),
         new BinaryOperationParser(TokenType.SYMBOL_EQUALS_EQUALS, OperatorPrecedence.EQUALS, UntypedBinaryOperator.EQUALS),
         new BinaryOperationParser(TokenType.SYMBOL_BANG_EQUALS, OperatorPrecedence.EQUALS, UntypedBinaryOperator.NOT_EQUAL),
+        new BinaryOperationParser(TokenType.SYMBOL_LESS_THAN, OperatorPrecedence.RELATIONAL, UntypedBinaryOperator.LESS_THAN),
         new BinaryOperationParser(TokenType.SYMBOL_PLUS, OperatorPrecedence.ADD, UntypedBinaryOperator.ADD),
         new BinaryOperationParser(TokenType.SYMBOL_MINUS, OperatorPrecedence.ADD, UntypedBinaryOperator.SUB),
         new CallParser()
diff --git a/src/main/java/org/shedlang/compiler/typechecker/TypeChecker.java b/src/main/java/org/shedlang/compiler/typechecker/TypeChecker.java
index dd85cd98..489ba1f7 100644
--- a/src/main/java/org/shedlang/compiler/typechecker/TypeChecker.java
+++ b/src/main/java/org/shedlang/compiler/typechecker/TypeChecker.java
@@ -232,13 +232,20 @@ public class TypeChecker {
     ) {
         if (left.equals(Types.INT) && right.equals(Types.INT)) {
             return switch (operator) {
-                case ADD -> TypedBinaryOperator.INT_ADD;
+                case ADD ->
+                    TypedBinaryOperator.INT_ADD;
 
-                case EQUALS -> TypedBinaryOperator.INT_EQUALS;
+                case EQUALS ->
+                    TypedBinaryOperator.INT_EQUALS;
 
-                case NOT_EQUAL -> TypedBinaryOperator.INT_NOT_EQUAL;
+                case LESS_THAN ->
+                    throw new UnsupportedOperationException("TODO");
 
-                case SUB -> TypedBinaryOperator.INT_SUB;
+                case NOT_EQUAL ->
+                    TypedBinaryOperator.INT_NOT_EQUAL;
+
+                case SUB ->
+                    TypedBinaryOperator.INT_SUB;
             };
         } else if (left.equals(Types.STRING) && right.equals(Types.STRING)) {
             if (operator == UntypedBinaryOperator.ADD) {