| 77 | |
| 78 | // ── Prefix / atoms ───────────────────────────────────────────────────── |
| 79 | function parsePrefix(): ASTNode { |
| 80 | const tok = cur(); |
| 81 | |
| 82 | // String literal |
| 83 | if (tok.t === T.Str) { |
| 84 | adv(); |
| 85 | return { k: "Str", v: tok.v as string }; |
| 86 | } |
| 87 | |
| 88 | // Number literal |
| 89 | if (tok.t === T.Num) { |
| 90 | adv(); |
| 91 | return { k: "Num", v: tok.v as number }; |
| 92 | } |
| 93 | |
| 94 | // Boolean literals |
| 95 | if (tok.t === T.True) { |
| 96 | adv(); |
| 97 | return { k: "Bool", v: true }; |
| 98 | } |
| 99 | if (tok.t === T.False) { |
| 100 | adv(); |
| 101 | return { k: "Bool", v: false }; |
| 102 | } |
| 103 | |
| 104 | // Null literal |
| 105 | if (tok.t === T.Null) { |
| 106 | adv(); |
| 107 | return { k: "Null" }; |
| 108 | } |
| 109 | |
| 110 | // Array |
| 111 | if (tok.t === T.LBrack) return parseArr(); |
| 112 | |
| 113 | // Object |
| 114 | if (tok.t === T.LBrace) return parseObj(); |
| 115 | |
| 116 | // State variable — may be assignment or reference |
| 117 | if (tok.t === T.StateVar) { |
| 118 | const name = tok.v as string; |
| 119 | adv(); |
| 120 | // Check for assignment: $var = expr (Equals, NOT EqEq) |
| 121 | if (cur().t === T.Equals) { |
| 122 | adv(); // consume = |
| 123 | const value = parseExpr(0); |
| 124 | return { k: "Assign", target: name, value }; |
| 125 | } |
| 126 | return { k: "StateRef", n: name }; |
| 127 | } |
| 128 | |
| 129 | // PascalCase — component call or reference |
| 130 | if (tok.t === T.Type) { |
| 131 | const name = tok.v as string; |
| 132 | // Builtins (Count, Each, Set, Run, etc.) require @-prefix — only Action is exempt |
| 133 | if (tokens[pos + 1]?.t === T.LParen && (!isBuiltin(name) || name === "Action")) |
| 134 | return parseComp(); |
| 135 | adv(); |
| 136 | return { k: "Ref", n: name }; |