From 741d78b6e840c88b7b183010c812ad982b342da1 Mon Sep 17 00:00:00 2001
From: Cliff Click <cliffc@acm.org>
Date: Mon, 10 Aug 2026 11:11:18 -0700
Subject: Chapter 28a: Modules and Lazy Class Initialization

Co-authored-by: Hsiang-Ying Fu <66062782+fuhsnn@users.noreply.github.com>
Co-authored-by: fuhsnn <66062782+fuhsnn@users.noreply.github.com>
Co-authored-by: Symious <14933944+symious@users.noreply.github.com>
Co-authored-by: Jun Kawasaki <jun784@gmail.com>
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
---
 .../java/com/seaofnodes/simple/EscapeTest.java     | 84 ----------------------
 1 file changed, 84 deletions(-)
 delete mode 100644 src/test/java/com/seaofnodes/simple/EscapeTest.java

(limited to 'src/test/java/com/seaofnodes/simple/EscapeTest.java')

diff --git a/src/test/java/com/seaofnodes/simple/EscapeTest.java b/src/test/java/com/seaofnodes/simple/EscapeTest.java
deleted file mode 100644
index 6d778350..00000000
--- a/src/test/java/com/seaofnodes/simple/EscapeTest.java
+++ /dev/null
@@ -1,84 +0,0 @@
-package com.seaofnodes.simple;
-
-import com.seaofnodes.simple.codegen.CodeGen;
-import com.seaofnodes.simple.node.*;
-import com.seaofnodes.simple.type.*;
-import org.junit.Test;
-import static org.junit.Assert.*;
-
-public class EscapeTest {
-    private static final String POWER = """
-        val power = { int base, int exponent ->
-            if (exponent <= 0) return 1;
-            int smaller=power(base,exponent-1);
-            return base * smaller;
-        };
-        """;
-    private static final String SUM = """
-        val sumPowers = { int n, {int int -> int} f ->
-            if (n <= 0) return 0;
-            return f(2,n) + sumPowers(n-1,f);
-        };
-        """;
-    private static ParmNode base(CodeGen code) {
-        ParmNode parm=code._start.walk(n -> n instanceof ParmNode p && p._label.equals("base") ? p : null);
-        assertNotNull(parm);
-        return parm;
-    }
-    private static CodeGen analyze(String src, long seed) {
-        return new CodeGen(src,TypeInteger.BOT,seed,true).driver(CodeGen.Phase.Opto);
-    }
-
-    @Test public void testKnownRecursiveCallback() {
-        String src=POWER+SUM+"return sumPowers(arg,power);";
-        for( long seed : new long[]{2,13,123} ) {
-            CodeGen code=analyze(src,seed);
-            ParmNode base=base(code);
-            assertSame(TypeInteger.constant(2),base._type);
-            assertFalse(base.fun().unknownCallers());
-            assertNotNull(code._start.walk(n -> n instanceof CallNode c && "power".equals(c.name()) ? c : null));
-            code.driver(CodeGen.Phase.TypeCheck);
-            assertEquals("14",Eval2.eval(code,3));
-        }
-    }
-
-    @Test public void testReturnedAddresses() {
-        // Returning the address, or a chain of objects containing it, restores
-        // arbitrary callers even when every visible call passes base=2.
-        String holder="struct Holder { {int int -> int} f; }; val h=new Holder { f=power; };";
-        for( String tail : new String[]{
-            "return power;",
-            holder+"return h;",
-            holder+"struct Wrap { Holder child; }; return new Wrap { child=h; };",
-            "struct Cell { {int int -> int}? !f; }; val h=new Cell; while(arg--) h.f=power; return h;"
-        } ) {
-            CodeGen code=analyze(POWER+SUM+"sumPowers(arg,power);"+tail,123);
-            ParmNode base=base(code);
-            assertSame(TypeInteger.BOT,base._type);
-            assertTrue(base.fun().unknownCallers());
-            assertTrue(code._start.escapedFIDX(base.fun().sig().fidx()));
-            code.driver(CodeGen.Phase.TypeCheck);
-        }
-    }
-
-    @Test public void testNativeExposure() {
-        for( String tail : new String[]{
-            "retain(power); return sumPowers(arg,power);",
-            "if(arg) { retain(power); while(true) {} } return sumPowers(arg,power);"
-        } ) {
-            String src=POWER+SUM+"{ {int int -> int} -> int } retain=\"C\";"+tail;
-            CodeGen code=analyze(src,123);
-            ParmNode base=base(code);
-            assertSame(TypeInteger.BOT,base._type);
-            assertTrue(base.fun().unknownCallers());
-            code.driver(CodeGen.Phase.TypeCheck);
-        }
-        // An external caller can inspect a field written through its argument,
-        // even though the exposed function itself returns only an integer.
-        String src="struct Holder { {int int -> int}? !f; };"+POWER+
-            "val expose={!Holder h -> h.f=power; return 0;}; return expose;";
-        CodeGen code=analyze(src,123);
-        assertTrue(base(code).fun().unknownCallers());
-        code.driver(CodeGen.Phase.TypeCheck);
-    }
-}
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