refactor: 重构编译任务代码

- 将类 CompileTask 改为记录类型,简化构造方法和成员变量定义
- 优化代码结构,按功能分块组织代码
- 改进注释,增加代码可读性
- 简化部分变量和方法名,提高代码清晰度
This commit is contained in:
Luke 2025-08-29 16:56:29 +08:00
parent 325ca67872
commit 4a64659856

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@ -31,71 +31,61 @@ import java.util.*;
import static org.jcnc.snow.common.SnowConfig.print; import static org.jcnc.snow.common.SnowConfig.print;
/** /**
* CLI 任务: 编译 .snow 源文件为 VM 字节码.water 文件 * CompileTask: .snow 源文件编译为 VM 字节码文件 (.water) CLI 任务实现
* <p> * <p>
* 支持单文件多文件和目录递归编译并可在编译后立即运行虚拟机<br> * 用法示例
* 命令行参数支持 run-o-d 及直接指定源文件
* </p>
*
* <pre> * <pre>
* 用法示例: * snow compile [run] [-o &lt;name&gt;] [-d &lt;srcDir&gt;] [file1.snow file2.snow ...]
* $ snow compile [run] [-o &lt;name&gt;] [-d &lt;srcDir&gt;] [file1.snow file2.snow ...]
* </pre> * </pre>
* 支持编译完成后立即运行生成的 VM
*/ */
public final class CompileTask implements Task { public record CompileTask(Project project, String[] args) implements Task {
/**
* 项目信息 /* ------------------------------------------------------------------ */
*/ /* 1. 构造方法和成员变量 */
private final Project project; /* ------------------------------------------------------------------ */
/**
* 原始命令行参数
*/
private final String[] args;
/** /**
* 创建一个编译任务 * 使用默认空参数数组的构造方法
* *
* @param project 项目信息对象 * @param project 当前项目对象
* @param args 命令行参数数组
*/
public CompileTask(Project project, String[] args) {
this.project = project;
this.args = args;
}
/**
* 创建一个不带参数的编译任务
*
* @param project 项目信息对象
*/ */
public CompileTask(Project project) { public CompileTask(Project project) {
this(project, new String[0]); this(project, new String[0]);
} }
/* ---------------------- 调试输出工具 ---------------------- */ /* ------------------------------------------------------------------ */
/* 2. 工具方法 */
/* ------------------------------------------------------------------ */
/** /**
* 推断 .water 输出文件名 * 推断输出 .water 文件的路径
* <p>
* 规则
* <ul> * <ul>
* <li>如果指定 -o直接使用该名称</li> * <li>若指定了 outName则以 outName 为基名</li>
* <li>目录编译时取目录名</li> * <li>否则若指定了目录则以目录名为基名</li>
* <li>单文件编译时取文件名去掉 .snow 后缀</li> * <li>否则若只有一个源文件则以该文件名 .snow 后缀为基名</li>
* <li>否则默认 "program"</li> * <li>否则默认 "program"</li>
* </ul> * </ul>
* *
* @param sources 源文件路径列表 * @param sources 源文件列表
* @param outName 输出文件名如有指定否则为 null * @param outName 用户指定的输出文件
* @param dir 目录如有指定否则为 null * @param dir 用户指定的源目录
* @return 推断出的输出文件路径.water 文件 * @return 推断得到的 .water 文件路径
*/ */
private static Path deriveOutputPath(List<Path> sources, String outName, Path dir) { private static Path deriveOutputPath(List<Path> sources,
String outName,
Path dir) {
String base; String base;
if (outName != null) { if (outName != null) {
base = outName; base = outName;
} else if (dir != null) { } else if (dir != null) {
base = dir.getFileName().toString(); base = dir.getFileName().toString();
} else if (sources.size() == 1) { } else if (sources.size() == 1) {
base = sources.getFirst().getFileName().toString() base = sources.getFirst()
.getFileName()
.toString()
.replaceFirst("\\.snow$", ""); .replaceFirst("\\.snow$", "");
} else { } else {
base = "program"; base = "program";
@ -104,15 +94,16 @@ public final class CompileTask implements Task {
} }
/** /**
* main 函数调整至函数列表首位确保程序入口为 PC=0 * main *.main 函数调整到列表首位确保程序入口的 PC = 0
* *
* @param in 原始 IRProgram * @param in 原始 IRProgram
* @return 调整入口后的 IRProgram * @return 调整入口顺序后的 IRProgram
*/ */
private static IRProgram reorderForEntry(IRProgram in) { private static IRProgram reorderForEntry(IRProgram in) {
List<IRFunction> ordered = new ArrayList<>(in.functions()); List<IRFunction> ordered = new ArrayList<>(in.functions());
for (int i = 0; i < ordered.size(); i++) { for (int i = 0; i < ordered.size(); i++) {
if ("main".equals(ordered.get(i).name())) { String fn = ordered.get(i).name();
if ("main".equals(fn) || fn.endsWith(".main")) {
Collections.swap(ordered, 0, i); Collections.swap(ordered, 0, i);
break; break;
} }
@ -122,10 +113,14 @@ public final class CompileTask implements Task {
return out; return out;
} }
/* ------------------------------------------------------------------ */
/* 3. 任务执行入口 */
/* ------------------------------------------------------------------ */
/** /**
* 执行编译任务该方法会解析参数并调用 {@link #execute(String[])} 进行实际编译流程 * 执行任务入口调用 execute 并处理异常
* *
* @throws Exception 执行过程中出现任意异常时抛出 * @throws Exception 执行过程出现异常
*/ */
@Override @Override
public void run() throws Exception { public void run() throws Exception {
@ -144,15 +139,15 @@ public final class CompileTask implements Task {
* @throws Exception 编译或写入过程中出现异常时抛出 * @throws Exception 编译或写入过程中出现异常时抛出
*/ */
public int execute(String[] args) throws Exception { public int execute(String[] args) throws Exception {
// ---------------- 解析命令行参数 ----------------
/* ---------------- 3.1 解析命令行参数 ---------------- */
boolean runAfterCompile = false; boolean runAfterCompile = false;
String outputName = null; String outputName = null;
Path dir = null; Path dir = null;
List<Path> sources = new ArrayList<>(); List<Path> sources = new ArrayList<>();
for (int i = 0; i < args.length; i++) { for (int i = 0; i < args.length; i++) {
String arg = args[i]; switch (args[i]) {
switch (arg) {
case "run" -> runAfterCompile = true; case "run" -> runAfterCompile = true;
case "--debug" -> SnowConfig.MODE = Mode.DEBUG; case "--debug" -> SnowConfig.MODE = Mode.DEBUG;
case "-o" -> { case "-o" -> {
@ -172,10 +167,10 @@ public final class CompileTask implements Task {
} }
} }
default -> { default -> {
if (arg.endsWith(".snow")) { if (args[i].endsWith(".snow")) {
sources.add(Path.of(arg)); sources.add(Path.of(args[i]));
} else { } else {
System.err.println("Unknown option or file: " + arg); System.err.println("Unknown option or file: " + args[i]);
new CompileCommand().printUsage(); new CompileCommand().printUsage();
return 1; return 1;
} }
@ -183,7 +178,7 @@ public final class CompileTask implements Task {
} }
} }
// --------- 如果指定了目录则递归收集所有 *.snow --------- /* ---------------- 3.2 递归收集目录中的 .snow 文件 ---------------- */
if (dir != null) { if (dir != null) {
if (!Files.isDirectory(dir)) { if (!Files.isDirectory(dir)) {
System.err.println("Not a directory: " + dir); System.err.println("Not a directory: " + dir);
@ -191,7 +186,7 @@ public final class CompileTask implements Task {
} }
try (var stream = Files.walk(dir)) { try (var stream = Files.walk(dir)) {
stream.filter(p -> p.toString().endsWith(".snow")) stream.filter(p -> p.toString().endsWith(".snow"))
.sorted() // 确保稳定顺序 .sorted()
.forEach(sources::add); .forEach(sources::add);
} }
} }
@ -200,87 +195,73 @@ public final class CompileTask implements Task {
System.err.println("No .snow source files found."); System.err.println("No .snow source files found.");
return 1; return 1;
} }
// 多文件但未指定 -o 且非目录编译 提示必须指定输出名
if (sources.size() > 1 && outputName == null && dir == null) { if (sources.size() > 1 && outputName == null && dir == null) {
System.err.println("Please specify output name using -o <name>"); System.err.println("Please specify output name using -o <name>");
return 1; return 1;
} }
// ---------------- 1. 词法/语法分析并打印源代码 ---------------- /* ---------------- 4. 词法和语法分析 ---------------- */
List<Node> allAst = new ArrayList<>(); List<Node> allAst = new ArrayList<>();
print("## 编译器输出"); print("## 编译器输出");
print("### Snow 源代码"); print("### Snow 源代码");
for (Path p : sources) { for (Path src : sources) {
if (!Files.exists(p)) { String code = Files.readString(src, StandardCharsets.UTF_8);
System.err.println("File not found: " + p); print("#### " + src.getFileName());
return 1;
}
String code = Files.readString(p, StandardCharsets.UTF_8);
// 打印源码
print("#### " + p.getFileName());
print(code); print(code);
// 词法语法分析 LexerEngine lex = new LexerEngine(code, src.toString());
LexerEngine lexer = new LexerEngine(code, p.toString()); if (!lex.getErrors().isEmpty()) return 1;
// 若词法阶段存在错误立即终止编译避免进入后续的语法及语义分析
if (!lexer.getErrors().isEmpty()) {
return 1;
}
ParserContext ctx = new ParserContext(lexer.getAllTokens(), p.toString()); ParserContext ctx = new ParserContext(lex.getAllTokens(), src.toString());
allAst.addAll(new ParserEngine(ctx).parse()); allAst.addAll(new ParserEngine(ctx).parse());
} }
// ---------------- 2. 语义分析 ---------------- /* ---------------- 5. 语义分析 ---------------- */
SemanticAnalyzerRunner.runSemanticAnalysis(allAst, false); SemanticAnalyzerRunner.runSemanticAnalysis(allAst, false);
// ---------------- 3. AST IR并将 main 函数移动至首位 ---------------- /* ---------------- 6. AST 转 IR并调整入口 ---------------- */
IRProgram program = new IRProgramBuilder().buildProgram(allAst); IRProgram program = new IRProgramBuilder().buildProgram(allAst);
program = reorderForEntry(program); program = reorderForEntry(program); // 确保 main 在首位
// 打印 AST IR
print("### AST"); print("### AST");
if (SnowConfig.isDebug()) ASTPrinter.printJson(allAst); if (SnowConfig.isDebug()) ASTPrinter.printJson(allAst);
print("### IR"); print("### IR");
print(program.toString()); print(program.toString());
// ---------------- 4. IR VM 指令 ---------------- /* ---------------- 7. IR 转 VM 指令 ---------------- */
VMProgramBuilder builder = new VMProgramBuilder(); VMProgramBuilder builder = new VMProgramBuilder();
List<InstructionGenerator<? extends IRInstruction>> generators = List<InstructionGenerator<? extends IRInstruction>> gens =
InstructionGeneratorProvider.defaultGenerators(); InstructionGeneratorProvider.defaultGenerators();
for (IRFunction fn : program.functions()) { for (IRFunction fn : program.functions()) {
Map<IRVirtualRegister, Integer> slotMap = Map<IRVirtualRegister, Integer> slotMap =
new RegisterAllocator().allocate(fn); new RegisterAllocator().allocate(fn);
new VMCodeGenerator(slotMap, builder, generators).generate(fn); new VMCodeGenerator(slotMap, builder, gens).generate(fn);
} }
List<String> finalCode = builder.build(); List<String> vmCode = builder.build();
print("### VM code"); print("### VM code");
if (SnowConfig.isDebug()) { if (SnowConfig.isDebug()) {
for (int i = 0; i < finalCode.size(); i++) { for (int i = 0; i < vmCode.size(); i++) {
String[] parts = finalCode.get(i).split(" "); String[] parts = vmCode.get(i).split(" ");
String name = OpHelper.opcodeName(parts[0]); String name = OpHelper.opcodeName(parts[0]);
parts = Arrays.copyOfRange(parts, 1, parts.length); parts = Arrays.copyOfRange(parts, 1, parts.length);
print("%04d: %-10s %s%n", i, name, String.join(" ", parts)); print("%04d: %-10s %s%n", i, name, String.join(" ", parts));
} }
} }
// ---------------- 5. 写出 .water 文件 ---------------- /* ---------------- 8. 写出 .water 文件 ---------------- */
Path outputFile = deriveOutputPath(sources, outputName, dir); Path outFile = deriveOutputPath(sources, outputName, dir);
Files.write(outputFile, finalCode, StandardCharsets.UTF_8); Files.write(outFile, vmCode, StandardCharsets.UTF_8);
print("Written to " + outputFile.toAbsolutePath()); print("Written to " + outFile.toAbsolutePath());
// ---------------- 6. 立即运行 VM ---------------- /* ---------------- 9. 可选运行 VM ---------------- */
if (runAfterCompile) { if (runAfterCompile) {
print("\n=== Launching VM ==="); print("\n=== Launching VM ===");
VMLauncher.main(new String[]{outputFile.toString()}); VMLauncher.main(new String[]{outFile.toString()});
print("\n=== VM exited ==="); print("\n=== VM exited ===");
} }