v2

node_modules/zod/src/compile.ts

@@ -0,0 +1,56 @@
+// Side-effect-only: installs the post-processor on `globalConfig`. Listed in `package.json`'s `sideEffects`, and nothing else references it, so apps that never import it drop the compiler.
+//
+// Usage:
+//
+//   import "zod/compile";
+//   import * as z from "zod";
+//   // every schema constructed below this is compiled on first parse
+//
+// Module evaluation order matters: schemas constructed in modules that evaluate before this import will not be compiled. Place this import in the app entry point, before any module that constructs schemas at top level.
+//
+// Failure handling: if the compiler refuses a schema (async refinement, unsupported feature, etc.) the shim permanently restores the runtime `_zod.run` for that schema. The schema continues to work via the regular runtime parser — no observable difference to the caller.
+
+import { compile } from "./v4/core/compile.js";
+import * as core from "./v4/core/index.js";
+
+let compiling = false;
+
+core.globalConfig.postProcessor = (inst: any) => {
+  if (compiling) return;
+  const originalRun = inst._zod?.run;
+  if (typeof originalRun !== "function") return;
+
+  const shim = (payload: any, ctx: any): any => {
+    // Bypass the fast path for any non-forward / non-sync / check-skipping call. The runtime owns those contracts.
+    if (ctx?.async || ctx?.direction === "backward" || ctx?.skipChecks) {
+      return originalRun(payload, ctx);
+    }
+
+    compiling = true;
+    try {
+      // Respect the jitless config: it exists precisely so CSP/no-eval environments never reach `new Function`. Global mode must not bypass it (explicit z.compile calls remain an explicit opt-in).
+      if (core.globalConfig.jitless) {
+        inst._zod.run = originalRun;
+        return originalRun(payload, ctx);
+      }
+      // Strict: the shim owns its own fallback below, and a non-strict compile would hand back `inst` — whose run is this shim — and reinstall it on itself.
+      const compiled = compile(inst, { strict: true });
+      // Only the run wrapper. Copying the compiled parse/safeParse closures would make their fallback re-enter this instance and run user callbacks a third time.
+      inst._zod.run = compiled._zod.run;
+      inst._zod.bag.fallbackRun = compiled._zod.bag.fallbackRun;
+      inst._zod.bag.validator = compiled._zod.bag.validator;
+    } catch {
+      // Permanent fallback for unsupported schemas.
+      inst._zod.run = originalRun;
+    } finally {
+      compiling = false;
+    }
+
+    return inst._zod.run(payload, ctx);
+  };
+
+  // Expose the pre-shim runtime so `compile()` invoked elsewhere can unwrap past the shim and capture the source-of-truth runtime. Without this, a user calling `z.compile(s)` after global mode is enabled would capture the shim itself, which would feed the wrapper into itself on fallback.
+  (shim as any).__originalRun = originalRun;
+
+  inst._zod.run = shim;
+};