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<svg aria-label="Compiler graph" width="902" height="942" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 902 942" 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(144,173)"><rect class="region-box" rx="8" width="538" height="354" fill="#f2f7ef"/></g></g><rect class="peep-area" rx="36" style="opacity: 0;"/><g class="edges"><path class="edge CTRL" id="e3i0" d="M326,841 C326,865 451,868 451,892" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#3[0] → #51 · CTRL</title></path><path class="edge DATA" id="e11i1" d="M356,118 L356,148 L316,148 L316,207" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#11[1] → #4 · DATA</title></path><path class="edge DATA" id="e11i2" d="M84,118 L84,158 L346,158 L346,207" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#11[2] → #10 · DATA</title></path><path class="edge CTRL" id="e12i0" d="M236,118 L236,311" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#12[0] → #1 · CTRL</title></path><path class="edge DATA" id="e12i1" d="M316,263 L316,311" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#12[1] → #11 · DATA</title></path><path class="edge DATA" id="e20i1" d="M356,118 L356,148 L494,148 L494,325.66666666666663" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#20[1] → #4 · DATA</title></path><path class="edge DATA" id="e20i2" d="M514,118 L514,128 L524,128 L524,325.66666666666663" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#20[2] → #19 · DATA</title></path><path class="edge CTRL" id="e31i1" d="M216,411 L216,421 L306,421 L306,459" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#31[1] → #5 · CTRL</title></path><path class="edge CTRL" id="e31i2" d="M336,411 L336,459" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#31[2] → #6 · CTRL</title></path><path class="edge DATA" id="e37i1" d="M494,381.66666666666663 L494,421 L438,421 L438,459" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#37[1] → #20 · DATA</title></path><path class="edge DATA" id="e37i2" d="M356,118 L356,148 L564,148 L564,431 L478,431 L478,459" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#37[2] → #4 · DATA</title></path><path class="edge DATA" id="e42i1" d="M458,515 L458,542 L540,542 L540,580" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#42[1] → #37 · DATA</title></path><path class="edge DATA" id="e42i2" d="M356,118 L356,148 L692,148 L692,542 L570,542 L570,580" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#42[2] → #4 · DATA</title></path><path class="edge DATA" id="e49i1" d="M666,118 L666,128 L590,128 L590,459" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#49[1] → #46 · DATA</title></path><path class="edge DATA" id="e49i2" d="M818,118 L818,138 L630,138 L630,459" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#49[2] → #48 · DATA</title></path><path class="edge DATA" id="e50i1" d="M540,636 L540,684" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#50[1] → #42 · DATA</title></path><path class="edge DATA" id="e50i2" d="M610,515 L610,646 L570,646 L570,684" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#50[2] → #49 · DATA</title></path><path class="edge CTRL" id="e51i0" d="M306,515 L306,788" stroke="#b63838" marker-start="url(#arrow-CTRL)" style="opacity: 1;"><title>#51[0] → #31 · CTRL</title></path><path class="edge DATA" id="e51i1" d="M540,740 L540,750 L346,750 L346,788" stroke="#536477" marker-start="url(#arrow-DATA)" style="opacity: 1;"><title>#51[1] → #50 · 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(176,68)" 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"> #1/0</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#1 $ctrl
Projection 0 of #2
Type not computed
[0] → #2 CTRL</title></g><g class="node" id="n2" data-id="2" transform="translate(176,24)" style="opacity: 1;"><path class="box" d="M0,0H240V44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="120" y="18"><tspan>Start</tspan><tspan class="node-id"> #2</tspan></text><text class="type" text-anchor="middle" y="35" x="120"/><title>#2 Start
Type not computed
</title></g><g class="node" id="n3" data-id="3" transform="translate(415,892)" 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] → #51 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(296,68)" style="opacity: 1;"><path class="box" d="M0,0H120V44H0Z" fill="#edf3f7"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>arg</tspan><tspan class="node-id"> #4/1</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#4 arg
Projection 1 of #2
Type not computed
[0] → #2 DATA</title></g><g class="node" id="n5" data-id="5" transform="translate(156,361)" 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"> #5/0</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#5 True
Projection 0 of #12
Type not computed
[0] → #12 CTRL</title></g><g class="node" id="n6" data-id="6" transform="translate(276,361)" 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"> #6/1</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#6 False
Projection 1 of #12
Type not computed
[0] → #12 CTRL</title></g><g class="node" id="n10" data-id="10" transform="translate(24,68)" 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>#1</tspan><tspan class="node-id"> #10</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#10 #1
Type not computed
</title></g><g class="node" id="n11" data-id="11" transform="translate(256,213)" 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>==</tspan><tspan class="node-id"> #11</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#11 ==
Type not computed
[0] → — DATA
[1] → #4 DATA
[2] → #10 DATA</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="n12" data-id="12" transform="translate(156,317)" style="opacity: 1;"><path class="box" d="M0,0H240V44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="120" y="18"><tspan>If</tspan><tspan class="node-id"> #12</tspan></text><text class="type" text-anchor="middle" y="35" x="120"/><title>#12 If
Type not computed
[0] → #1 CTRL
[1] → #11 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="n19" data-id="19" transform="translate(454,68)" 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>#2</tspan><tspan class="node-id"> #19</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#19 #2
Type not computed
</title></g><g class="node" id="n20" data-id="20" transform="translate(434,331.66666666666663)" 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>*</tspan><tspan class="node-id"> #20</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#20 *
Type not computed
[0] → — DATA
[1] → #4 DATA
[2] → #19 DATA</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="n31" data-id="31" transform="translate(246,465)" style="opacity: 1;"><path class="box" d="M12,0H108L120,44H0Z" fill="#fff1c4"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>Region</tspan><tspan class="node-id"> #31</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#31 Region
Type not computed
[0] → — DATA
[1] → #5 CTRL
[2] → #6 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="n37" data-id="37" transform="translate(398,465)" style="opacity: 1;"><path class="box" d="M12,0H108L120,22L108,44H12L0,22Z" fill="#f5e4fa"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>φ_b</tspan><tspan class="node-id"> #37</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#37 φ_b
Type not computed
[0] → #31 ASSOC
[1] → #20 DATA
[2] → #4 DATA</title><circle class="port" cx="-3" cy="22" r="3" fill="#536477"/><circle class="port" cx="40" cy="-3" r="3" fill="#536477"/><circle class="port" cx="80" cy="-3" r="3" fill="#536477"/><path class="reg" fill="none" stroke="#b63838" d="M-3,22H-18m4,-3l-4,3l4,3"><title>[0] → #31</title></path><text class="slot" x="-10" y="15" text-anchor="middle">0</text><text class="slot" x="40" y="-10" text-anchor="middle">1</text><text class="slot" x="80" y="-10" text-anchor="middle">2</text></g><g class="node" id="n42" data-id="42" transform="translate(480,586)" 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>+</tspan><tspan class="node-id"> #42</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#42 +
Type not computed
[0] → — DATA
[1] → #37 DATA
[2] → #4 DATA</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="n46" data-id="46" transform="translate(606,68)" 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>#4</tspan><tspan class="node-id"> #46</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#46 #4
Type not computed
</title></g><g class="node" id="n48" data-id="48" transform="translate(758,68)" 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>#5</tspan><tspan class="node-id"> #48</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#48 #5
Type not computed
</title></g><g class="node" id="n49" data-id="49" transform="translate(550,465)" style="opacity: 1;"><path class="box" d="M12,0H108L120,22L108,44H12L0,22Z" fill="#f5e4fa"/><text class="label" text-anchor="middle" x="60" y="18"><tspan>φ_ab</tspan><tspan class="node-id"> #49</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#49 φ_ab
Type not computed
[0] → #31 ASSOC
[1] → #46 DATA
[2] → #48 DATA</title><circle class="port" cx="-3" cy="22" r="3" fill="#536477"/><circle class="port" cx="40" cy="-3" r="3" fill="#536477"/><circle class="port" cx="80" cy="-3" r="3" fill="#536477"/><path class="reg" fill="none" stroke="#b63838" d="M-3,22H-18m4,-3l-4,3l4,3"><title>[0] → #31</title></path><text class="slot" x="-10" y="15" text-anchor="middle">0</text><text class="slot" x="40" y="-10" text-anchor="middle">1</text><text class="slot" x="80" y="-10" text-anchor="middle">2</text></g><g class="node" id="n50" data-id="50" transform="translate(480,690)" 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>+</tspan><tspan class="node-id"> #50</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#50 +
Type not computed
[0] → — DATA
[1] → #42 DATA
[2] → #49 DATA</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="n51" data-id="51" transform="translate(266,794)" 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"> #51</tspan></text><text class="type" text-anchor="middle" y="35" x="60"/><title>#51 Return
Type not computed
[0] → #31 CTRL
[1] → #50 DATA</title><circle class="port" cx="40" cy="-3" r="3" fill="#536477"/><circle class="port" cx="80" cy="-3" r="3" fill="#536477"/><text class="slot" x="40" y="-10" text-anchor="middle">0</text><text class="slot" x="80" y="-10" text-anchor="middle">1</text></g></g><g class="region-heads" style="opacity: 1;"><g class="region-head" transform="translate(144,173)"><text class="label" x="26" y="17"><tspan>If</tspan><tspan class="node-id"> #12</tspan></text><title>If · 8 nodes</title><g class="fold-btn" role="button" tabindex="0" transform="translate(4,4)" aria-label="Fold region #12"><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>
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