'==' operator, tests for equality and operator precedence.

3 files changed, 36 insertions, 6 deletions

diff --git a/c/builtin.c b/c/builtin.c
index 7943675d..375e3252 100644
--- a/c/builtin.c
+++ b/c/builtin.c
@@ -100,6 +100,11 @@ static void f_divide(jv input[], jv output[]) {
   }  
 }
 
+static void f_equal(jv input[], jv output[]) {
+  jv_free(input[0]);
+  output[0] = jv_bool(jv_equal(input[2], input[1]));
+}
+
 static void f_tonumber(jv input[], jv output[]) {
   if (jv_get_kind(input[0]) == JV_KIND_NUMBER) {
     output[0] = input[0];
@@ -133,5 +138,6 @@ struct cfunction function_list[] = {
   {f_multiply, "_multiply", CALL_BUILTIN_3_1},
   {f_divide, "_divide", CALL_BUILTIN_3_1},
   {f_tonumber, "tonumber", CALL_BUILTIN_1_1},
+  {f_equal, "_equal", CALL_BUILTIN_3_1},
 };
 struct symbol_table builtins = {function_list, sizeof(function_list)/sizeof(function_list[0])};
diff --git a/c/parser.y b/c/parser.y
index 225a324e..0f1e42c4 100644
--- a/c/parser.y
+++ b/c/parser.y
@@ -19,11 +19,6 @@
 %token <literal> IDENT
 %token <literal> LITERAL
 
- /* revolting hack */
-%left ';'
-
-%left '|'
-%left ','
 %token EQ "=="
 %token DEFINEDOR "//"
 %token AS "as"
@@ -37,6 +32,12 @@
 %token AND "and"
 %token OR "or"
 %token NOT "not"
+
+
+ /* revolting hack */
+%left ';'
+%left '|'
+%left ','
 %right "//"
 %nonassoc '=' SETPIPE
 %nonassoc EQ
@@ -64,13 +65,14 @@ static block gen_index(block obj, block key) {
   return block_join(obj, block_join(gen_subexp(key), gen_op_simple(INDEX)));
 }
 
-static block gen_binop(block a, block b, char op) {
+static block gen_binop(block a, block b, int op) {
   const char* funcname = 0;
   switch (op) {
   case '+': funcname = "_plus"; break;
   case '-': funcname = "_minus"; break;
   case '*': funcname = "_multiply"; break;
   case '/': funcname = "_divide"; break;
+  case EQ: funcname = "_equal"; break;
   }
   assert(funcname);
 
@@ -129,6 +131,7 @@ Exp "and" Exp {
   $$ = gen_and($1, $3);
 } |
 
+
 "not" Exp {
   $$ = gen_not($2);
 } |
@@ -168,6 +171,10 @@ Exp '/' Exp {
   $$ = gen_binop($1, $3, '/');
 } |
 
+Exp "==" Exp {
+  $$ = gen_binop($1, $3, EQ);
+} |
+
 Term { 
   $$ = $1; 
 }
diff --git a/c/testdata b/c/testdata
index 45140242..bd1d7f25 100644
--- a/c/testdata
+++ b/c/testdata
@@ -183,10 +183,27 @@ null
 null
 10
 
+[16 / 4 / 2, 16 / 4 * 2, 16 - 4 - 2, 16 - 4 + 2]
+null
+[2, 8, 10, 14]
+
 1 + tonumber + ("10" | tonumber)
 4
 15
 
+[{"a":42},.object,10,.num,false,true,null,"b",[1,4]] | .[] as $x | [$x == .[]]
+{"object": {"a":42}, "num":10.0}
+[true,  true,  false, false, false, false, false, false, false]
+[true,  true,  false, false, false, false, false, false, false]
+[false, false, true,  true,  false, false, false, false, false]
+[false, false, true,  true,  false, false, false, false, false]
+[false, false, false, false, true,  false, false, false, false]
+[false, false, false, false, false, true,  false, false, false]
+[false, false, false, false, false, false, true,  false, false]
+[false, false, false, false, false, false, false, true,  false]
+[false, false, false, false, false, false, false, false, true ]
+
+
 #
 # User-defined functions
 # Oh god.