From e4dc3273f201ae741637b626998637cce973546b Mon Sep 17 00:00:00 2001
From: Cliff Click <cliffc@acm.org>
Date: Fri, 2 Oct 2026 13:04:34 -0700
Subject: First pass README updates

---
 chapter11/docs/graph8.svg | 213 +++++++++++++++++++++-------------------------
 1 file changed, 98 insertions(+), 115 deletions(-)

(limited to 'chapter11/docs/graph8.svg')

diff --git a/chapter11/docs/graph8.svg b/chapter11/docs/graph8.svg
index a89eeeb5..4db46240 100644
--- a/chapter11/docs/graph8.svg
+++ b/chapter11/docs/graph8.svg
@@ -1,115 +1,98 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
- "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<!-- Generated by graphviz version 12.2.0 (20241103.1931)
- -->
-<!-- Title: chapter11 Pages: 1 -->
-<svg width="166pt" height="426pt"
- viewBox="0.00 0.00 166.00 426.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
-<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 422)">
-<title>chapter11</title>
-<polygon fill="white" stroke="none" points="-4,4 -4,-422 162,-422 162,4 -4,4"/>
-<g id="clust1" class="cluster">
-<title>cluster_Nodes</title>
-<polygon fill="none" stroke="black" points="8,-8 8,-410 150,-410 150,-8 8,-8"/>
-</g>
-<!-- Never18 -->
-<g id="node1" class="node">
-<title>Never18</title>
-<polygon fill="yellow" stroke="none" points="24,-196.5 24,-223 100,-223 100,-196.5 24,-196.5"/>
-<polygon fill="none" stroke="black" points="24,-196.5 24,-223 100,-223 100,-196.5 24,-196.5"/>
-<text text-anchor="start" x="45.5" y="-204.7" font-family="Times New Roman,serif" font-size="14.00">Never</text>
-<polygon fill="none" stroke="black" points="24,-164 24,-196.5 100,-196.5 100,-164 24,-164"/>
-<polygon fill="yellow" stroke="none" points="29,-169 29,-191.5 60.5,-191.5 60.5,-169 29,-169"/>
-<polygon fill="none" stroke="black" points="29,-169 29,-191.5 60.5,-191.5 60.5,-169 29,-169"/>
-<text text-anchor="start" x="32" y="-175.2" font-family="Times New Roman,serif" font-size="14.00">True</text>
-<polygon fill="yellow" stroke="none" points="60.5,-169 60.5,-191.5 95,-191.5 95,-169 60.5,-169"/>
-<polygon fill="none" stroke="black" points="60.5,-169 60.5,-191.5 95,-191.5 95,-169 60.5,-169"/>
-<text text-anchor="start" x="63.5" y="-175.2" font-family="Times New Roman,serif" font-size="14.00">False</text>
-</g>
-<!-- Con_4 -->
-<g id="node4" class="node">
-<title>Con_4</title>
-<ellipse fill="none" stroke="black" cx="115" cy="-281" rx="27" ry="18"/>
-<text text-anchor="middle" x="115" y="-275.95" font-family="Times New Roman,serif" font-size="14.00">#0</text>
-</g>
-<!-- Never18&#45;&gt;Con_4 -->
-<g id="edge2" class="edge">
-<title>Never18&#45;&gt;Con_4</title>
-<path fill="none" stroke="black" d="M82.04,-226.82C87.68,-235.93 93.75,-245.71 99.11,-254.37"/>
-<polygon fill="black" stroke="black" points="95.99,-255.97 104.23,-262.63 101.94,-252.28 95.99,-255.97"/>
-<text text-anchor="middle" x="79.79" y="-228.97" font-family="Helvetica,sans-Serif" font-size="8.00">1</text>
-</g>
-<!-- Loop8 -->
-<g id="node6" class="node">
-<title>Loop8</title>
-<polygon fill="yellow" stroke="black" points="70,-299 16,-299 16,-263 70,-263 70,-299"/>
-<text text-anchor="middle" x="43" y="-275.95" font-family="Times New Roman,serif" font-size="14.00">Loop</text>
-</g>
-<!-- Never18&#45;&gt;Loop8 -->
-<g id="edge1" class="edge">
-<title>Never18&#45;&gt;Loop8</title>
-<path fill="none" stroke="red" d="M54.82,-226.82C52.98,-235.08 51.02,-243.9 49.24,-251.93"/>
-<polygon fill="red" stroke="red" points="45.87,-250.97 47.11,-261.49 52.7,-252.49 45.87,-250.97"/>
-<text text-anchor="middle" x="52.57" y="-228.97" font-family="Helvetica,sans-Serif" font-size="8.00">0</text>
-</g>
-<!-- Start2 -->
-<g id="node2" class="node">
-<title>Start2</title>
-<polygon fill="yellow" stroke="none" points="23.62,-371.5 23.62,-398 64.38,-398 64.38,-371.5 23.62,-371.5"/>
-<polygon fill="none" stroke="black" points="23.62,-371.5 23.62,-398 64.38,-398 64.38,-371.5 23.62,-371.5"/>
-<text text-anchor="start" x="31.25" y="-379.7" font-family="Times New Roman,serif" font-size="14.00">Start</text>
-<polygon fill="none" stroke="black" points="23.62,-339 23.62,-371.5 64.38,-371.5 64.38,-339 23.62,-339"/>
-<polygon fill="yellow" stroke="none" points="28.62,-344 28.62,-366.5 59.38,-366.5 59.38,-344 28.62,-344"/>
-<polygon fill="none" stroke="black" points="28.62,-344 28.62,-366.5 59.38,-366.5 59.38,-344 28.62,-344"/>
-<text text-anchor="start" x="31.62" y="-350.2" font-family="Times New Roman,serif" font-size="14.00">$ctrl</text>
-</g>
-<!-- Stop3 -->
-<g id="node3" class="node">
-<title>Stop3</title>
-<polygon fill="yellow" stroke="black" points="107,-52 53,-52 53,-16 107,-16 107,-52"/>
-<text text-anchor="middle" x="80" y="-28.95" font-family="Times New Roman,serif" font-size="14.00">Stop</text>
-</g>
-<!-- Return21 -->
-<g id="node5" class="node">
-<title>Return21</title>
-<polygon fill="yellow" stroke="black" points="107,-124 53,-124 53,-88 107,-88 107,-124"/>
-<text text-anchor="middle" x="80" y="-100.95" font-family="Times New Roman,serif" font-size="14.00">Return</text>
-</g>
-<!-- Stop3&#45;&gt;Return21 -->
-<g id="edge3" class="edge">
-<title>Stop3&#45;&gt;Return21</title>
-<path fill="none" stroke="red" d="M80,-52.3C80,-59.59 80,-68.27 80,-76.46"/>
-<polygon fill="red" stroke="red" points="76.5,-76.38 80,-86.38 83.5,-76.38 76.5,-76.38"/>
-<text text-anchor="middle" x="77.75" y="-54.45" font-family="Helvetica,sans-Serif" font-size="8.00">0</text>
-</g>
-<!-- Return21&#45;&gt;Never18 -->
-<g id="edge4" class="edge">
-<title>Return21&#45;&gt;Never18:p0</title>
-<path fill="none" stroke="red" d="M63.41,-124.45C56.41,-133.22 49.19,-144.55 46.19,-156.68"/>
-<polygon fill="red" stroke="red" points="42.73,-156.14 44.94,-166.5 49.68,-157.02 42.73,-156.14"/>
-<text text-anchor="middle" x="61.16" y="-126.6" font-family="Helvetica,sans-Serif" font-size="8.00">0</text>
-</g>
-<!-- Return21&#45;&gt;Con_4 -->
-<g id="edge5" class="edge">
-<title>Return21&#45;&gt;Con_4</title>
-<path fill="none" stroke="black" d="M96.04,-124.15C104.01,-133.88 112.83,-146.73 117,-160 126.51,-190.23 124.01,-226.9 120.42,-251.69"/>
-<polygon fill="black" stroke="black" points="117,-250.9 118.86,-261.33 123.91,-252.02 117,-250.9"/>
-<text text-anchor="middle" x="93.79" y="-126.3" font-family="Helvetica,sans-Serif" font-size="8.00">2</text>
-</g>
-<!-- Loop8&#45;&gt;Never18 -->
-<g id="edge7" class="edge">
-<title>Loop8&#45;&gt;Never18:p1</title>
-<path fill="none" stroke="red" d="M66.89,-262.62C77.59,-253.37 89.1,-241.02 95,-227 100.86,-213.08 109.7,-194.71 106.13,-185.7"/>
-<polygon fill="red" stroke="red" points="107.8,-182.63 97.33,-180.97 104.48,-188.79 107.8,-182.63"/>
-<text text-anchor="middle" x="64.64" y="-255.02" font-family="Helvetica,sans-Serif" font-size="8.00">2</text>
-</g>
-<!-- Loop8&#45;&gt;Start2 -->
-<g id="edge6" class="edge">
-<title>Loop8&#45;&gt;Start2:p0</title>
-<path fill="none" stroke="red" d="M43.44,-299.35C43.64,-308.51 43.85,-320.2 43.95,-331.69"/>
-<polygon fill="red" stroke="red" points="40.45,-331.5 43.99,-341.49 47.45,-331.47 40.45,-331.5"/>
-<text text-anchor="middle" x="41.19" y="-301.5" font-family="Helvetica,sans-Serif" font-size="8.00">1</text>
-</g>
-</g>
-</svg>
+<svg aria-label="Compiler graph" width="431" height="676" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 431 676" style="font-family: sans-serif;"><style>
+    html, body { height:100%; margin:0; font-family:sans-serif; }
+    .viewer { height:100%; display:grid; grid-template-rows:auto minmax(0,1fr) auto; }
+    .source { padding:8px; border-bottom:1px solid #ccc; }
+    #program { width:min(600px,80vw); vertical-align:middle; }
+    #status { margin-top:4px; }
+    #graph { min-height:0; overflow:hidden; position:relative; background:#fafbfc; }
+    #elk { width:100%; height:100%; }
+    #graph svg { display:block; }
+    .tools { display:flex; flex-wrap:wrap; align-items:center; gap:14px; margin-top:8px; font-size:12px; }
+    .hint { color:#616c78; }
+    .ctrl { color:#b63838; } .mem { color:#2867b2; } .data { color:#536477; }
+    .edge { fill:none; stroke-width:1.5; }
+    .edge.CTRL { stroke-width:2; }
+    .edge.ASSOC { stroke-dasharray:4 4; }
+    .edge.PARSER { stroke-dasharray:5 4; }
+    .parser rect { fill:#f6f0ff; stroke:#7956a5; stroke-width:1.5; stroke-dasharray:5 4; }
+    .edge.selected { stroke-width:3.5; }
+    .edge.bundle { stroke-width:4; }
+    .edge.bundle.selected { stroke-width:6; }
+    .edge-hit { fill:none; stroke:transparent; stroke-width:12; vector-effect:non-scaling-stroke; pointer-events:stroke; cursor:pointer; }
+    .edge-jump { fill:transparent; pointer-events:all; cursor:pointer; }
+    .node { cursor:pointer; }
+    .box { stroke:#758191; stroke-width:1; }
+    .node.held .box { stroke-dasharray:5 3; }
+    .node.near .box { stroke:#c18221; stroke-width:2; }
+    .node.focus .box { stroke:#9c4900; stroke-width:3; }
+    .node.selected .box { stroke:#1569b9; stroke-width:3; }
+    .node.folded .box { stroke-width:4; }
+    .node.folding .box { fill:#f4ccd7; }
+    .fold-tag { font-size:9px; font-weight:700; fill:#963751; }
+    .peep-area { fill:#fff3d9; fill-opacity:.8; stroke:#c18221; stroke-width:2; pointer-events:none; }
+    .node.peep-edit .box { stroke:#9c4900; stroke-width:3; }
+    .node.error .box { stroke:#b42318; stroke-width:4; }
+    #event.error { color:#b42318; font-weight:600; white-space:pre-wrap; overflow-wrap:anywhere; }
+    .peep-ghosts { pointer-events:none; }
+    .region-box { stroke:#9da9b8; stroke-width:1.5; }
+    .fold-btn { cursor:pointer; }
+    .fold-btn rect { fill:white; stroke:#596674; }
+    .fold-btn text { font-size:14px; fill:#152330; }
+    .fold-btn:focus rect { stroke:#1569b9; stroke-width:2; }
+    .shortcut { cursor:pointer; }
+    .shortcut path { fill:none; stroke-width:1.5; }
+    .shortcut rect { fill:#fff8ec; stroke:#b63838; stroke-dasharray:3 2; }
+    .shortcut text { font-size:11px; fill:#783030; }
+    .shortcut.selected rect, .shortcut:focus rect { stroke-width:2.5; }
+    .label { font-size:12px; fill:#152330; font-weight:600; }
+    .node-id { font-size:10px; fill:#596674; font-weight:400; }
+    .type { font-size:11px; fill:#455768; }
+    .port { stroke:#536477; stroke-width:1; }
+    .row { stroke:#b6afcf; stroke-width:1; }
+    .bind { font-size:12px; fill:#152330; }
+    .slot { font-size:10px; fill:#364352; paint-order:stroke; stroke:#fafbfc; stroke-width:3; }
+    #detail { position:absolute; top:8px; right:8px; margin:0; padding:12px; max-width:320px;
+      max-height:45%; overflow:auto; white-space:pre-wrap; overflow-wrap:anywhere;
+      background:#fffffff2; border:1px solid #bac5d0; border-radius:4px; font-size:12px; }
+    .controls { display:flex; flex-wrap:wrap; justify-content:center; align-items:center; gap:6px; padding:6px; }
+    .button { color:white; background:black; font-size:20px; min-width:30px; }
+    .button:disabled { background:grey; }
+    .count { font-size:20px; min-width:35px; text-align:center; }
+    #N { width:6ch; }
+    #scrub { width:clamp(120px,35vw,600px); }
+  </style><defs><marker id="arrow-CTRL" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#b63838"/></marker><marker id="arrow-DATA" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#536477"/></marker><marker id="arrow-MEM" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#2867b2"/></marker><marker id="arrow-ASSOC" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#9396a3"/></marker><marker id="arrow-PARSER" viewBox="0 -4 8 8" refX="8" refY="0" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0,-4L8,0L0,4Z" fill="#7956a5"/></marker></defs><rect width="100%" height="100%" fill="rgb(250, 251, 252)"/><g><g class="regions" style="opacity: 1;"><g class="region" transform="translate(24,171)"><rect class="region-box" rx="8" width="313" height="298" fill="#f1f6fc"/></g></g><rect class="peep-area" rx="36" style="opacity: 0;"/><g class="edges"><path class="edge CTRL" id="e3i0" d="M126,575 C126,599 215.5,602 215.5,626" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#3[0] → #21 · CTRL</title></path><path class="edge CTRL" id="e8i1" d="M116,118 L116,233" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#8[1] → #6 · CTRL</title></path><path class="edge CTRL" id="e8i2" d="M216,434 L216,444 L325,444 L325,224 L146,224 L146,236" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#8[2] → #5 · CTRL</title></path><path class="edge CTRL" id="e18i0" d="M116,289 L116,337" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#18[0] → #8 · CTRL</title></path><path class="edge DATA" id="e18i1" d="M347,118 L347,128 L302,128 L302,299 L196,299 L196,337" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#18[1] → #4 · DATA</title></path><path class="edge CTRL" id="e21i0" d="M96,437 L96,522" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#21[0] → #1 · CTRL</title></path><path class="edge DATA" id="e21i2" d="M347,118 L347,484 L156,484 L156,522" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#21[2] → #4 · DATA</title></path></g><g class="edge-hits"/><g class="parser" style="opacity: 1;"/><g class="nodes"><g class="node" id="n1" data-id="1" transform="translate(36,387)" style="opacity: 1;"><path class="box" d="M0,0H120V44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>True</tspan><tspan class="node-id">  #1/0</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#1 True
+Projection 0 of #18
+Type not computed
+
+[0] → #18  CTRL</title></g><g class="node" id="n2" data-id="2" transform="translate(56,24)" style="opacity: 1;"><path class="box" d="M0,0H120V44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>Start</tspan><tspan class="node-id">  #2</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#2 Start
+Type not computed
+
+</title></g><g class="node" id="n3" data-id="3" transform="translate(179.5,626)" style="opacity: 1;"><path class="box" d="M0,0H72V26H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="36" y="17"><tspan>Stop</tspan><tspan class="node-id">  #3</tspan></text><text class="type" text-anchor="middle" y="35" x="36"/><title>#3 Stop
+Type not computed
+
+[0] → #21  CTRL</title><circle class="port" cx="36" cy="0" r="3" fill="#536477"/><text class="slot" x="36" y="-7" text-anchor="middle">0</text></g><g class="node" id="n4" data-id="4" transform="translate(287,68)" style="opacity: 1;"><path class="box" d="M14,0H106Q120,0 120,14V30Q120,44 106,44H14Q0,44 0,30V14Q0,0 14,0Z" fill="#edf3f7"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>#0</tspan><tspan class="node-id">  #4</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#4 #0
+Type not computed
+
+</title></g><g class="node" id="n5" data-id="5" transform="translate(156,387)" style="opacity: 1;"><path class="box" d="M0,0H120V44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>False</tspan><tspan class="node-id">  #5/1</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#5 False
+Projection 1 of #18
+Type not computed
+
+[0] → #18  CTRL</title></g><g class="node" id="n6" data-id="6" transform="translate(56,68)" style="opacity: 1;"><path class="box" d="M0,0H120V44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>$ctrl</tspan><tspan class="node-id">  #6/0</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#6 $ctrl
+Projection 0 of #2
+Type not computed
+
+[0] → #2  CTRL</title></g><g class="node" id="n8" data-id="8" transform="translate(56,239)" style="opacity: 1;"><path class="box" d="M20,0H100Q120,0 120,20V24Q120,44 100,44H20Q0,44 0,24V20Q0,0 20,0Z" fill="#ffe0ab"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>Loop</tspan><tspan class="node-id">  #8</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#8 Loop
+Type not computed
+
+[0] → —  DATA
+[1] → #6  CTRL
+[2] → #5  CTRL</title><circle class="port" cx="30" cy="-3" r="3" fill="white"/><circle class="port" cx="60" cy="-3" r="3" fill="#536477"/><circle class="port" cx="90" cy="-3" r="3" fill="#536477"/><text class="slot" x="30" y="-10" text-anchor="middle">0</text><text class="slot" x="60" y="-10" text-anchor="middle">1</text><text class="slot" x="90" y="-10" text-anchor="middle">2</text></g><g class="node" id="n18" data-id="18" transform="translate(36,343)" style="opacity: 1;"><path class="box" d="M0,0H240V44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="120" y="18"><tspan>Never</tspan><tspan class="node-id">  #18</tspan></text><text class="type" text-anchor="middle" y="35" x="120"/><title>#18 Never
+Type not computed
+
+[0] → #8  CTRL
+[1] → #4  DATA</title><circle class="port" cx="80" cy="-3" r="3" fill="#536477"/><circle class="port" cx="160" cy="-3" r="3" fill="#536477"/><text class="slot" x="80" y="-10" text-anchor="middle">0</text><text class="slot" x="160" y="-10" text-anchor="middle">1</text></g><g class="node" id="n21" data-id="21" transform="translate(66,528)" style="opacity: 1;"><path class="box" d="M0,0H120V44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>Return</tspan><tspan class="node-id">  #21</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#21 Return
+Type not computed
+
+[0] → #1  CTRL
+[1] → —  DATA
+[2] → #4  DATA</title><circle class="port" cx="30" cy="-3" r="3" fill="#536477"/><circle class="port" cx="60" cy="-3" r="3" fill="white"/><circle class="port" cx="90" cy="-3" r="3" fill="#536477"/><text class="slot" x="30" y="-10" text-anchor="middle">0</text><text class="slot" x="60" y="-10" text-anchor="middle">1</text><text class="slot" x="90" y="-10" text-anchor="middle">2</text></g></g><g class="region-heads" style="opacity: 1;"><g class="region-head" transform="translate(24,171)"><text class="label" x="26" y="17"><tspan>Loop</tspan><tspan class="node-id">  #8</tspan></text><title>Loop · 4 nodes</title><g class="fold-btn" role="button" tabindex="0" transform="translate(4,4)" aria-label="Fold region #8"><rect width="16" height="16" rx="2"/><text x="8" y="12" text-anchor="middle">−</text><title>Fold region</title></g></g></g><g class="shortcuts" style="opacity: 1;"/><g class="peep-ghosts" pointer-events="none"/></g></svg>
-- 
cgit v1.2.3