From f8bcf996119e07114b191b54bc01444bd602804a Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sat, 8 Jul 2023 21:22:43 +0100
Subject: Parse equality

---
 src/main/java/org/shedlang/compiler/parser/OperatorPrecedence.java | 5 +++--
 src/main/java/org/shedlang/compiler/parser/Parser.java             | 1 +
 src/main/java/org/shedlang/compiler/parser/TokenType.java          | 1 +
 src/main/java/org/shedlang/compiler/parser/Tokeniser.java          | 1 +
 4 files changed, 6 insertions(+), 2 deletions(-)

(limited to 'src/main/java')

diff --git a/src/main/java/org/shedlang/compiler/parser/OperatorPrecedence.java b/src/main/java/org/shedlang/compiler/parser/OperatorPrecedence.java
index 109499de..6bd5319a 100644
--- a/src/main/java/org/shedlang/compiler/parser/OperatorPrecedence.java
+++ b/src/main/java/org/shedlang/compiler/parser/OperatorPrecedence.java
@@ -1,8 +1,9 @@
 package org.shedlang.compiler.parser;
 
 public enum OperatorPrecedence {
-    ADD(1),
-    CALL(2);
+    EQUALS(1),
+    ADD(2),
+    CALL(3);
 
     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 0915f1bd..f163236b 100644
--- a/src/main/java/org/shedlang/compiler/parser/Parser.java
+++ b/src/main/java/org/shedlang/compiler/parser/Parser.java
@@ -154,6 +154,7 @@ public class Parser {
     }
 
     private static final Map<TokenType, OperationParser> OPERATION_PARSERS = Stream.of(
+        new BinaryOperationParser(TokenType.SYMBOL_EQUALS_EQUALS, OperatorPrecedence.EQUALS, UntypedBinaryOperator.EQUALS),
         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/parser/TokenType.java b/src/main/java/org/shedlang/compiler/parser/TokenType.java
index 9f439e03..2b810988 100644
--- a/src/main/java/org/shedlang/compiler/parser/TokenType.java
+++ b/src/main/java/org/shedlang/compiler/parser/TokenType.java
@@ -20,6 +20,7 @@ public enum TokenType {
     SYMBOL_COMMA,
     SYMBOL_DOT,
     SYMBOL_EQUALS,
+    SYMBOL_EQUALS_EQUALS,
     SYMBOL_MINUS,
     SYMBOL_PAREN_OPEN,
     SYMBOL_PAREN_CLOSE,
diff --git a/src/main/java/org/shedlang/compiler/parser/Tokeniser.java b/src/main/java/org/shedlang/compiler/parser/Tokeniser.java
index 2f967452..e06109b1 100644
--- a/src/main/java/org/shedlang/compiler/parser/Tokeniser.java
+++ b/src/main/java/org/shedlang/compiler/parser/Tokeniser.java
@@ -27,6 +27,7 @@ public class Tokeniser {
             RegexTokeniser.rule(TokenType.STRING, "\"(?:[^\\\\\"\n\r]|\\\\.)*\""),
             RegexTokeniser.rule(TokenType.WHITESPACE, "[\r\n\t ]+"),
 
+            RegexTokeniser.rule(TokenType.SYMBOL_EQUALS_EQUALS, "=="),
             RegexTokeniser.rule(TokenType.SYMBOL_THIN_ARROW, "->"),
 
             RegexTokeniser.rule(TokenType.SYMBOL_BANG, "!"),
-- 
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