From d8b678356ea9653e58b55c102f9901b677ff22bd Mon Sep 17 00:00:00 2001
From: Bob Nystrom <robert@stuffwithstuff.com>
Date: Sun, 18 Jan 2015 10:20:13 -0800
Subject: [PATCH] Raise precedence of "is". Fix #119.

---
 src/wren_compiler.c                    | 2 +-
 test/is/is.wren                        | 3 ---
 test/{grammar.wren => precedence.wren} | 4 ++++
 3 files changed, 5 insertions(+), 4 deletions(-)
 rename test/{grammar.wren => precedence.wren} (87%)

diff --git a/src/wren_compiler.c b/src/wren_compiler.c
index 2b615da6..28209472 100644
--- a/src/wren_compiler.c
+++ b/src/wren_compiler.c
@@ -1311,8 +1311,8 @@ typedef enum
   PREC_LOWEST,
   PREC_ASSIGNMENT, // =
   PREC_LOGIC,      // && ||
-  PREC_IS,         // is
   PREC_EQUALITY,   // == !=
+  PREC_IS,         // is
   PREC_COMPARISON, // < > <= >=
   PREC_RANGE,      // .. ...
   PREC_BITWISE,    // | &
diff --git a/test/is/is.wren b/test/is/is.wren
index 2a4765c9..717bf1b6 100644
--- a/test/is/is.wren
+++ b/test/is/is.wren
@@ -28,9 +28,6 @@ IO.print(new Fn { 1 } is Class) // expect: false
 IO.print("s" is Class) // expect: false
 IO.print(123 is Class) // expect: false
 
-// TODO: Non-class on RHS.
-// TODO: Precedence and associativity.
-
 // Ignore newline after "is".
 IO.print(123 is
   Num) // expect: true
\ No newline at end of file
diff --git a/test/grammar.wren b/test/precedence.wren
similarity index 87%
rename from test/grammar.wren
rename to test/precedence.wren
index cca6ec4e..e14b110c 100644
--- a/test/grammar.wren
+++ b/test/precedence.wren
@@ -22,6 +22,10 @@ IO.print(false == 2 <= 1) // expect: true
 // >= has higher precedence than ==.
 IO.print(false == 1 >= 2) // expect: true
 
+// is has higher precedence than ==.
+IO.print(true == 10 is Num) // expect: true
+IO.print(10 is Num == false) // expect: false
+
 // Unary - has lower precedence than ..
 IO.print(-"abc".count) // expect: -3