add a standard library, and introduce formed imports (import std "myfile.pork")

stdlib/src/main/kotlin/gay/pizza/pork/stdlib/PorkStdlib.kt

@@ -0,0 +1,33 @@
+package gay.pizza.pork.stdlib
+
+import gay.pizza.pork.frontend.ContentSource
+import gay.pizza.pork.parser.CharSource
+import gay.pizza.pork.parser.StringCharSource
+
+object PorkStdlib : ContentSource {
+  private val stdlibClass = PorkStdlib::class.java
+
+  private fun readManifestFiles(): List<String> {
+    val manifestContent = read("stdlib.manifest")
+    return manifestContent.split("\n").filter { line ->
+      val trimmed = line.trim()
+      trimmed.isNotEmpty() && !trimmed.startsWith("#")
+    }
+  }
+
+  val files: List<String> = readManifestFiles()
+
+  private fun read(path: String): String {
+    val stream = stdlibClass.getResourceAsStream("/pork/stdlib/${path}")
+      ?: throw RuntimeException("Stdlib does not contain file '${path}'")
+    return String(stream.readAllBytes())
+  }
+
+  override fun loadAsCharSource(path: String): CharSource {
+    return StringCharSource(read(path))
+  }
+
+  override fun stableContentIdentity(path: String): String {
+    return path
+  }
+}

stdlib/src/main/pork/ffi/malloc.pork

@@ -0,0 +1,5 @@
+export func malloc(size)
+  native ffi "c:malloc:void*"
+
+export func free(pointer)
+  native ffi "c:free:void"

stdlib/src/main/pork/numbers.pork

@@ -0,0 +1,15 @@
+export func add(a, b) {
+  a + b
+}
+
+export func subtract(a, b) {
+  a - b
+}
+
+export func multiply(a, b) {
+  a * b
+}
+
+export func divide(a, b) {
+  a / b
+}

stdlib/src/main/pork/stdlib.manifest

@@ -0,0 +1 @@
+numbers.pork