adrien
35959784de
Replace the nested if-else branch-analysis architecture with a flat DFA model using CodeGen.emitFlat — a single DFS walk emitting each block as a C label followed by its code and gotos to all successors. Removed: - _branchDescendants / emitBranch / generateCallWithError - _generateCallWithError, _noWalkNext, _genVisited - generateNextCode, findBackEdges - WCDecision._branchDescendants / _emitBranch / overridden generateCode Added: - CodeGen.emitFlat(entry) — flat DFS emit with labels + gotos - WCBlock.generateFlowCode() — base emits gotos from wcNextFlow - WCDecision.generateFlowCode() — if-goto / goto for decisions - WCProcCall.generateFlowCode() — if (call != 0) goto err / goto ok Output is flat — zero nested if-else for branch/error handling. Tests use local out/ directory.
92 lines
2.9 KiB
JavaScript
92 lines
2.9 KiB
JavaScript
// ── Pure C code generation — zero-DOM, flat DFA model ─────────────────
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//
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// Every block is a C label. Every flow edge is a `goto label;`.
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// There is zero nesting: no if/else chains, no branch-analysis, no
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// shared-block computation. Decisions become `if (cond) goto yes;
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// goto no;`. Error handling becomes `if (call != 0) goto err;
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// goto ok;`.
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//
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// Block interface:
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// { id: string,
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// generateOwnCode(): string, // C code for this one block
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// generateFlowCode?(): string, // flow-control (gotos). If absent,
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// // CodeGen walks wcNextFlow instead.
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// wcNextFlow?: [{toElement: block}],
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// nextFlow?: [{toElement: block}] }
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(function () {
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"use strict";
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var CodeGen = {};
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/**
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* Emits a complete C program as a flat sequence of labelled blocks
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* connected by gotos. Each block is emitted once (DFS order); already-
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* visited blocks become `goto label;` stubs.
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*
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* @param {Object} entry the first block (e.g. START)
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* @returns {string}
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*/
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CodeGen.emitFlat = function (entry) {
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var visited = new Set();
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var parts = [];
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function emit(block) {
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if (visited.has(block)) {
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parts.push(" goto " + block.id + ";\n");
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return;
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}
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visited.add(block);
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parts.push("\n" + block.id + ":");
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var own = block.generateOwnCode();
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if (own) parts.push(own);
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// Flow control: custom generateFlowCode, or auto from wcNextFlow
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var flow = block.wcNextFlow || block.nextFlow || [];
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var fc = "";
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if (typeof block.generateFlowCode === "function") {
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fc = block.generateFlowCode();
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} else {
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for (var i = 0; i < flow.length; i++) {
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var t = flow[i].toElement;
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if (t) fc += " goto " + t.id + ";\n";
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}
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}
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if (fc) parts.push("\n" + fc);
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// Recurse into successors (visited blocks are skipped at top)
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for (var i = 0; i < flow.length; i++) {
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var t = flow[i].toElement;
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if (t) emit(t);
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}
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}
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emit(entry);
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return parts.join("");
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};
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/**
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* Assembles a complete C source file.
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*/
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CodeGen.generateCFile = function (entryBlock, includes, declarations) {
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var lines = ["// --- WiseCode\u00ae ---"];
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for (var i = 0; i < includes.length; i++) lines.push(includes[i]);
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lines.push("");
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lines.push("int main() {");
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if (declarations) lines.push(declarations);
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lines.push(CodeGen.emitFlat(entryBlock));
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lines.push("}");
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lines.push("// --- END ---");
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return lines.join("\n");
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};
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// ── Export ──────────────────────────────────────────────────────────
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if (typeof module !== "undefined" && module.exports) {
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module.exports = CodeGen;
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}
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if (typeof window !== "undefined") {
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window.CodeGen = CodeGen;
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}
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})();
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