实现 12.6 符号表与链接：全局定槽、引用解析、循环检测。
- Linker.h/cpp：收集导出（仅 gvl 文件顶层 VAR_GLOBAL、声明顺序定槽、重复名拒绝） - VAR_EXTERNAL 接同一槽、类型一致；FB 实例必须先声明；字段存在性校验；函数调用图 DFS 环检测 - io.var 必须在 GVL；内建 TON/TOF/CTU 布局冻结；用户 FB 字段 = input/output/var（external 不是字段） - 函数名赋值 = 结果值写入（用例 13 约定）；dump_symbols 打印 name kind type address file - linker_test：51 断言（用例 09/10/11/12/16/19 + line1/17 正例），ctest 7/7；20 用例扫描 15 绿 5 按期望拒
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@@ -45,3 +45,14 @@ target_compile_definitions(parser_test PRIVATE
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add_test(NAME parser_syntax
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COMMAND parser_test)
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# 链接测试：用例 09/10/11/12/16/19 + line1 正例（REPO_ROOT 注入源目录绝对路径）
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add_executable(linker_test
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./src/linker_test.cpp)
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target_link_libraries(linker_test PRIVATE compiler)
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target_compile_definitions(linker_test PRIVATE
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REPO_ROOT="${CMAKE_SOURCE_DIR}")
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add_test(NAME linker_links
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COMMAND linker_test)
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@@ -0,0 +1,229 @@
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/**
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* @file linker_test.cpp
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* @brief 链接测试：用例 09/10/11/12/16/19 + line1 正例
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* @author
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* @date 2026-08-21
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*/
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#include <cstdio>
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#include <string>
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#include <vector>
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#include "compiler/Linker.h"
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#include "compiler/Project.h"
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#ifndef REPO_ROOT
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#define REPO_ROOT "."
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#endif
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static int g_checks = 0;
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#define CHECK(cond) \
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do { \
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if (!(cond)) { \
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std::printf("FAIL %s:%d: %s\n", __FILE__, __LINE__, #cond); \
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return false; \
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} \
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++g_checks; \
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} while (0)
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// 从用例目录加载工程并链接
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static bool link_case(const char* dir, compiler::LinkResult* out, std::string* err) {
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using namespace compiler;
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const std::string toml = std::string(REPO_ROOT) + "/tests/cases/" + dir + "/project.toml";
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Project p;
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if (!parse_project(toml, &p, err)) {
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return false;
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}
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std::vector<SourceUnit> units;
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for (const std::string& f : compile_files(p)) {
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SourceUnit u;
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if (!load_unit(p.base_dir + "/" + f, &u, err)) {
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return false;
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}
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units.push_back(std::move(u));
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}
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return link_project(p, units, out, err);
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}
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static bool expect_link_err(const char* dir, const char* keyword) {
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compiler::LinkResult r;
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std::string err;
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if (link_case(dir, &r, &err)) {
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std::printf("FAIL %s: linked ok\n", dir);
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return false;
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}
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if (err.find("link error") != 0) {
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std::printf("FAIL %s: want 'link error', got '%s'\n", dir, err.c_str());
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return false;
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}
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if (err.find(keyword) == std::string::npos) {
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std::printf("FAIL %s: want '%s', got '%s'\n", dir, keyword, err.c_str());
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return false;
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}
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++g_checks;
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return true;
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}
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// ---- 1. 用例 09：GVL + VAR_EXTERNAL 同一槽 ----
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static bool test_case09() {
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using namespace compiler;
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LinkResult r;
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std::string err;
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CHECK(link_case("09_gvl_external", &r, &err));
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CHECK(r.globals.size() == 1);
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CHECK(r.globals[0].name == "g1");
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CHECK(r.globals[0].kind == SymbolKind::Global);
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CHECK(r.globals[0].type_name == "int");
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CHECK(r.globals[0].address == 0);
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CHECK(r.scopes.size() == 1);
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const LinkResult::PouScope& main = r.scopes[0];
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CHECK(main.name == "main");
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bool saw_external = false;
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for (const Symbol& s : main.syms) {
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if (s.name == "g1") {
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saw_external = true;
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CHECK(s.kind == SymbolKind::External);
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CHECK(s.address == 0); // 同一槽
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CHECK(s.type_name == "int");
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}
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}
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// 符号表打印：name kind type address file
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const std::string dump = dump_symbols(r);
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CHECK(dump.find("g1 global int 0 ") != std::string::npos);
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CHECK(dump.find("[main]") != std::string::npos);
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CHECK(dump.find("g1 external int 0 ") != std::string::npos);
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return true;
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}
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// ---- 2. 用例 10 / 11 / 12 ----
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static bool test_neg_cases() {
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if (!expect_link_err("10_gvl_wrong_file", "VAR_GLOBAL only allowed in gvl file")) {
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return false;
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}
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if (!expect_link_err("11_duplicate_global", "duplicate global")) {
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return false;
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}
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if (!expect_link_err("12_io_unknown_var", "io.var 'Nope' not in GVL")) {
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return false;
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}
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return true;
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}
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// ---- 3. 用例 16：未声明实例 ----
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static bool test_case16() {
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if (!expect_link_err("16_fb_undeclared", "undeclared FB instance")) {
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return false;
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}
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return true;
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}
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// ---- 4. 用例 19：循环调用 ----
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static bool test_case19() {
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if (!expect_link_err("19_recursive_call", "recursive call")) {
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return false;
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}
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return true;
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}
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// ---- 5. line1 正例：全局槽序 / FB 布局 / 字段 / 实例 ----
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static bool test_line1() {
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using namespace compiler;
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LinkResult r;
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std::string err;
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const std::string toml = std::string(REPO_ROOT) + "/examples/line1/project.toml";
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Project p;
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CHECK(parse_project(toml, &p, &err));
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std::vector<SourceUnit> units;
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for (const std::string& f : compile_files(p)) {
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SourceUnit u;
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CHECK(load_unit(p.base_dir + "/" + f, &u, &err));
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units.push_back(std::move(u));
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}
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CHECK(link_project(p, units, &r, &err));
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// 全局槽序 = 声明顺序
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CHECK(r.globals.size() == 4);
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CHECK(r.globals[0].name == "emergencystop");
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CHECK(r.globals[1].name == "i0_0");
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CHECK(r.globals[2].name == "i0_1");
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CHECK(r.globals[3].name == "q0_0");
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// 用户 FB 布局：MotorStarter 字段 = input/output（external 不是字段）
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const auto it = r.fb_types.find("motorstarter");
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CHECK(it != r.fb_types.end());
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CHECK(it->second.fields.size() == 3);
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CHECK(it->second.fields[0].name == "start");
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CHECK(it->second.fields[1].name == "stop");
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CHECK(it->second.fields[2].name == "q");
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CHECK(it->second.fields[2].type == TypeKind::Bool);
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// 内建 TON 布局（用例 17 的 t）
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const FbLayout* ton = nullptr;
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for (const auto& [name, lay] : r.fb_types) {
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(void)name;
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(void)lay;
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}
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// 直接构造 TON 实例验证内建表（见 case17 用）
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// main 作用域：starter 实例 + 字段引用
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CHECK(r.scopes.size() == 2); // motorstarter + main
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const LinkResult::PouScope& main = r.scopes[1];
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bool saw_starter = false;
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for (const Symbol& s : main.syms) {
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if (s.name == "starter") {
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saw_starter = true;
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CHECK(s.kind == SymbolKind::FbInstance);
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CHECK(s.type_name == "motorstarter");
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}
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}
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CHECK(saw_starter);
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const auto sit = main.fb_instances.find("starter");
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CHECK(sit != main.fb_instances.end());
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CHECK(sit->second.fields.size() == 3);
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return true;
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}
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// ---- 6. 内建 FB 布局（TON）----
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static bool test_builtin() {
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using namespace compiler;
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LinkResult r;
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std::string err;
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const std::string toml = std::string(REPO_ROOT) + "/tests/cases/17_ton/project.toml";
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Project p;
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CHECK(parse_project(toml, &p, &err));
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std::vector<SourceUnit> units;
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for (const std::string& f : compile_files(p)) {
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SourceUnit u;
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CHECK(load_unit(p.base_dir + "/" + f, &u, &err));
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units.push_back(std::move(u));
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}
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CHECK(link_project(p, units, &r, &err));
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CHECK(r.scopes.size() == 1);
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const LinkResult::PouScope& main = r.scopes[0];
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const auto it = main.fb_instances.find("t");
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CHECK(it != main.fb_instances.end());
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CHECK(it->second.fields.size() == 4);
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CHECK(it->second.fields[0].name == "in" && it->second.fields[0].type == TypeKind::Bool);
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CHECK(it->second.fields[1].name == "pt" && it->second.fields[1].type == TypeKind::Time);
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CHECK(it->second.fields[2].name == "q" && it->second.fields[2].type == TypeKind::Bool);
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CHECK(it->second.fields[3].name == "et" && it->second.fields[3].type == TypeKind::Time);
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return true;
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}
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int main() {
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if (!test_case09()) return 1;
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if (!test_neg_cases()) return 1;
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if (!test_case16()) return 1;
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if (!test_case19()) return 1;
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if (!test_line1()) return 1;
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if (!test_builtin()) return 1;
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std::printf("linker_test: %d checks passed\n", g_checks);
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return 0;
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}
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