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

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This commit is contained in:
Stephen Dolan
2012-09-10 18:08:00 +01:00
parent 3895bbf856
commit 4d47f8f1e1
3 changed files with 36 additions and 6 deletions
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6
c/builtin.c
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@ -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])};

19
c/parser.y
View File

@ -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;
}

17
c/testdata
View File

@ -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.