[js] Implement nqp::replace.

Raku · Jan 13, 2016 · da7532a · da7532a
1 parent d667c8e
commit da7532a
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diff --git a/src/vm/js/QAST/Compiler.nqp b/src/vm/js/QAST/Compiler.nqp
@@ -607,6 +607,8 @@ class QAST::OperationsJS {
         nqp::defined($length) ?? "$string.substr($start,$length)" !! "$string.substr($start)";
     });
 
+    add_simple_op('replace', $T_STR, [$T_STR, $T_INT, $T_INT, $T_STR]);
+
     # TODO portability to JScript (according to mdn it doesn't support negative offset - check it)
     add_simple_op('eqat', $T_BOOL, [$T_STR, $T_STR, $T_INT], sub ($haystack, $needle, $offset) {
         "($haystack.substr($offset, $needle.length) === $needle)"

diff --git a/src/vm/js/nqp-runtime/core.js b/src/vm/js/nqp-runtime/core.js
@@ -843,6 +843,10 @@ op.bitxor_s = function(a, b) {
   }
 };
 
+op.replace = function(str, offset, count, repl) {
+  return str.substr(0, offset) + repl + str.substr(offset + count);
+};
+
 op.getcodelocation = function(code) {
   var hash = new Hash();
   hash.content.set('file', 'unknown');