1 files changed, 51 insertions, 0 deletions
diff --git a/node_modules/get-source/impl/SyncPromise.js b/node_modules/get-source/impl/SyncPromise.js
new file mode 100644
index 0000000..1412532
--- /dev/null
+++ b/node_modules/get-source/impl/SyncPromise.js
@@ -0,0 +1,51 @@
+"use strict";
+
+/*  ------------------------------------------------------------------------ */
+
+module.exports = class SyncPromise {
+
+    constructor (fn) {
+        try {
+            fn (
+                x => { this.setValue (x, false) }, // resolve
+                x => { this.setValue (x, true) }   // reject
+            )
+        } catch (e) {
+            this.setValue (e, true)
+        }
+    }
+
+    setValue (x, rejected) {
+        this.val      = (x instanceof SyncPromise) ? x.val : x
+        this.rejected = rejected || ((x instanceof SyncPromise) ? x.rejected : false)
+    }
+
+    static valueFrom (x) {
+        if (x instanceof SyncPromise) {
+            if (x.rejected) throw  x.val
+            else            return x.val
+        } else {
+            return x
+        }
+    }
+
+    then (fn) {
+        try       { if (!this.rejected) return SyncPromise.resolve (fn (this.val)) }
+        catch (e) {                     return SyncPromise.reject (e) }
+        return this
+    }
+
+    catch (fn) {
+        try       { if (this.rejected) return SyncPromise.resolve (fn (this.val)) }
+        catch (e) {                    return SyncPromise.reject (e) }
+        return this
+    }
+
+    static resolve (x) {
+        return new SyncPromise (resolve => { resolve (x) })
+    }
+
+    static reject (x) {
+        return new SyncPromise ((_, reject) => { reject (x) })
+    }
+}
+\ No newline at end of file