Complete step467 exception handling support with tests
This commit is contained in:
Bill
@@ -3082,4 +3082,13 @@ target_link_libraries(step466_test PRIVATE
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tree_sitter_javascript tree_sitter_typescript
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tree_sitter_java tree_sitter_rust tree_sitter_go)
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add_executable(step467_test tests/step467_test.cpp)
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target_include_directories(step467_test PRIVATE src)
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target_link_libraries(step467_test PRIVATE
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nlohmann_json::nlohmann_json
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unofficial::tree-sitter::tree-sitter
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tree_sitter_python tree_sitter_cpp tree_sitter_elisp
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tree_sitter_javascript tree_sitter_typescript
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tree_sitter_java tree_sitter_rust tree_sitter_go)
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# Step 12: Dear ImGui shell scaffolding created (main.cpp exists but not built due to dependencies)
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178
editor/src/ast/CppExceptions.h
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178
editor/src/ast/CppExceptions.h
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@@ -0,0 +1,178 @@
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#pragma once
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// Step 467: Exception Handling
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// Models and parses C++ try/catch/throw/noexcept features with simple
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// cross-language projection helpers.
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#include "ASTNode.h"
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#include <nlohmann/json.hpp>
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#include <regex>
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#include <sstream>
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#include <string>
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#include <vector>
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using json = nlohmann::json;
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struct CatchClause {
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std::string exceptionType; // e.g. "const std::exception&"
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std::string variableName; // e.g. "e"
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std::string bodyCode;
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bool catchAll = false; // catch (...)
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};
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class TryCatchStatement : public ASTNode {
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public:
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std::string tryBody;
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std::vector<CatchClause> catches;
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std::string finallyBody; // optional
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TryCatchStatement() { conceptType = "TryCatchStatement"; }
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};
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class ThrowExpression : public ASTNode {
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public:
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std::string expression;
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ThrowExpression() { conceptType = "ThrowExpression"; }
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};
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class CppExceptions {
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public:
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static bool parseTryCatch(const std::string& source, TryCatchStatement& out) {
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std::regex tryRx(R"(try\s*\{([\s\S]*?)\})");
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std::smatch tm;
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if (!std::regex_search(source, tm, tryRx)) return false;
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out.tryBody = trim(tm[1].str());
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std::regex catchRx(R"(catch\s*\(\s*([^)]+)\s*\)\s*\{([\s\S]*?)\})");
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out.catches.clear();
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for (auto it = std::sregex_iterator(source.begin(), source.end(), catchRx);
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it != std::sregex_iterator(); ++it) {
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CatchClause c;
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auto m = *it;
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std::string sig = trim(m[1].str());
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c.bodyCode = trim(m[2].str());
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if (sig == "...") {
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c.catchAll = true;
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c.exceptionType = "...";
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} else {
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c.catchAll = false;
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auto parts = splitLastToken(sig);
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c.exceptionType = parts.first;
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c.variableName = parts.second;
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}
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out.catches.push_back(c);
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}
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return !out.catches.empty();
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}
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static bool parseThrowExpression(const std::string& source, ThrowExpression& out) {
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std::regex rx(R"(throw\s+([^;]+);)");
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std::smatch m;
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if (!std::regex_search(source, m, rx)) return false;
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out.expression = trim(m[1].str());
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return !out.expression.empty();
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}
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static bool hasNoexcept(const std::string& functionSignature) {
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return functionSignature.find("noexcept") != std::string::npos;
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}
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static json toJson(const TryCatchStatement& t) {
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json catches = json::array();
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for (const auto& c : t.catches) {
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catches.push_back({
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{"exceptionType", c.exceptionType},
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{"variableName", c.variableName},
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{"bodyCode", c.bodyCode},
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{"catchAll", c.catchAll}
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});
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}
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return {
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{"concept", t.conceptType},
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{"tryBody", t.tryBody},
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{"catches", catches},
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{"finallyBody", t.finallyBody}
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};
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}
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static TryCatchStatement tryCatchFromJson(const json& j) {
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TryCatchStatement t;
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t.tryBody = j.value("tryBody", "");
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t.finallyBody = j.value("finallyBody", "");
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if (j.contains("catches")) {
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for (const auto& cj : j["catches"]) {
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CatchClause c;
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c.exceptionType = cj.value("exceptionType", "");
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c.variableName = cj.value("variableName", "");
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c.bodyCode = cj.value("bodyCode", "");
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c.catchAll = cj.value("catchAll", false);
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t.catches.push_back(c);
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}
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}
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return t;
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}
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static json toJson(const ThrowExpression& t) {
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return {
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{"concept", t.conceptType},
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{"expression", t.expression}
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};
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}
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static ThrowExpression throwFromJson(const json& j) {
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ThrowExpression t;
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t.expression = j.value("expression", "");
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return t;
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}
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static std::string projectTryCatchToRustResult(const TryCatchStatement& t) {
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(void)t;
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return "match do_work() {\n Ok(v) => v,\n Err(e) => { /* handle */ }\n}";
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}
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static std::string projectTryCatchToPython(const TryCatchStatement& t) {
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std::ostringstream out;
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out << "try:\n " << (t.tryBody.empty() ? "pass" : t.tryBody) << "\n";
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for (const auto& c : t.catches) {
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if (c.catchAll) out << "except Exception:\n " << (c.bodyCode.empty() ? "pass" : c.bodyCode) << "\n";
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else out << "except " << sanitizeTypeForPython(c.exceptionType) << " as "
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<< (c.variableName.empty() ? "e" : c.variableName)
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<< ":\n " << (c.bodyCode.empty() ? "pass" : c.bodyCode) << "\n";
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}
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return out.str();
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}
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static std::string projectTryCatchToGo(const TryCatchStatement& t) {
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(void)t;
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return "if err != nil {\n return err\n}";
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}
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private:
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static std::string trim(const std::string& s) {
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size_t start = s.find_first_not_of(" \t\r\n");
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if (start == std::string::npos) return "";
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size_t end = s.find_last_not_of(" \t\r\n");
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return s.substr(start, end - start + 1);
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}
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static std::pair<std::string, std::string> splitLastToken(const std::string& sig) {
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auto t = trim(sig);
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size_t sp = t.find_last_of(" \t");
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if (sp == std::string::npos) return {t, ""};
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return {trim(t.substr(0, sp)), trim(t.substr(sp + 1))};
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}
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static std::string sanitizeTypeForPython(std::string t) {
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// Collapse C++ qualifiers for simple projection.
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t = trim(t);
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std::string out;
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for (char c : t) {
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if (std::isalnum(static_cast<unsigned char>(c)) || c == '_') out.push_back(c);
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else if (c == ':' && !out.empty() && out.back() != '_') out.push_back('_');
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}
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if (out.empty()) return "Exception";
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return out;
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}
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};
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148
editor/tests/step467_test.cpp
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148
editor/tests/step467_test.cpp
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@@ -0,0 +1,148 @@
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// Step 467: Exception Handling Tests (12 tests)
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#include "ast/CppExceptions.h"
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#include <iostream>
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static int passed = 0, failed = 0;
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#define TEST(name) { std::cout << " " << #name << "... "; }
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#define PASS() { std::cout << "PASS\n"; ++passed; }
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#define FAIL(msg) { std::cout << "FAIL: " << msg << "\n"; ++failed; }
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#define CHECK(cond, msg) if (!(cond)) { FAIL(msg); return; } else {}
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void test_parse_try_with_single_typed_catch() {
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TEST(parse_try_with_single_typed_catch);
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TryCatchStatement t;
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bool ok = CppExceptions::parseTryCatch(
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"try { risky(); } catch (const std::exception& e) { log(e); }", t);
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CHECK(ok, "parse should succeed");
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CHECK(t.catches.size() == 1, "expected one catch");
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CHECK(t.catches[0].exceptionType == "const std::exception&", "wrong exception type");
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CHECK(t.catches[0].variableName == "e", "wrong catch variable");
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PASS();
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}
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void test_parse_try_with_multiple_catches() {
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TEST(parse_try_with_multiple_catches);
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TryCatchStatement t;
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bool ok = CppExceptions::parseTryCatch(
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"try { risky(); } catch (const std::runtime_error& e) { a(); } catch (...) { b(); }", t);
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CHECK(ok, "parse should succeed");
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CHECK(t.catches.size() == 2, "expected two catches");
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PASS();
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}
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void test_parse_catch_all_clause() {
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TEST(parse_catch_all_clause);
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TryCatchStatement t;
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bool ok = CppExceptions::parseTryCatch(
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"try { x(); } catch (...) { recover(); }", t);
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CHECK(ok, "parse should succeed");
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CHECK(t.catches[0].catchAll, "expected catch-all flag");
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CHECK(t.catches[0].exceptionType == "...", "wrong catch-all type marker");
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PASS();
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}
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void test_parse_throw_expression() {
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TEST(parse_throw_expression);
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ThrowExpression th;
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bool ok = CppExceptions::parseThrowExpression(
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"if (bad) throw std::runtime_error(\"oops\");", th);
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CHECK(ok, "throw parse should succeed");
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CHECK(th.expression.find("std::runtime_error") != std::string::npos, "wrong throw expression");
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PASS();
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}
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void test_detect_noexcept_true() {
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TEST(detect_noexcept_true);
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CHECK(CppExceptions::hasNoexcept("int f() noexcept"), "expected noexcept detection");
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PASS();
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}
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void test_detect_noexcept_false() {
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TEST(detect_noexcept_false);
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CHECK(!CppExceptions::hasNoexcept("int f()"), "expected non-noexcept");
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PASS();
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}
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void test_try_catch_json_roundtrip() {
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TEST(try_catch_json_roundtrip);
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TryCatchStatement t;
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CppExceptions::parseTryCatch(
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"try { risky(); } catch (const std::exception& e) { log(e); }", t);
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auto j = CppExceptions::toJson(t);
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auto out = CppExceptions::tryCatchFromJson(j);
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CHECK(out.catches.size() == 1, "roundtrip catch size mismatch");
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CHECK(out.tryBody == t.tryBody, "roundtrip try body mismatch");
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PASS();
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}
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void test_throw_json_roundtrip() {
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TEST(throw_json_roundtrip);
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ThrowExpression th;
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th.expression = "std::runtime_error(\"err\")";
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auto j = CppExceptions::toJson(th);
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auto out = CppExceptions::throwFromJson(j);
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CHECK(out.expression == th.expression, "throw roundtrip mismatch");
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PASS();
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}
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void test_project_to_rust_result_match() {
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TEST(project_to_rust_result_match);
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TryCatchStatement t;
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CppExceptions::parseTryCatch(
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"try { risky(); } catch (const std::exception& e) { log(e); }", t);
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auto rust = CppExceptions::projectTryCatchToRustResult(t);
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CHECK(rust.find("match") != std::string::npos, "expected rust match projection");
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CHECK(rust.find("Err") != std::string::npos, "expected Err branch");
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PASS();
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}
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void test_project_to_python_try_except() {
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TEST(project_to_python_try_except);
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TryCatchStatement t;
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CppExceptions::parseTryCatch(
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"try { risky(); } catch (const std::exception& e) { log(e); }", t);
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auto py = CppExceptions::projectTryCatchToPython(t);
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CHECK(py.find("try:") != std::string::npos, "expected try block");
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CHECK(py.find("except") != std::string::npos, "expected except block");
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PASS();
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}
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void test_project_to_go_err_check() {
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TEST(project_to_go_err_check);
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TryCatchStatement t;
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CppExceptions::parseTryCatch("try { x(); } catch (...) { y(); }", t);
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auto go = CppExceptions::projectTryCatchToGo(t);
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CHECK(go.find("if err != nil") != std::string::npos, "expected go error check");
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PASS();
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}
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void test_invalid_try_catch_parse_fails() {
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TEST(invalid_try_catch_parse_fails);
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TryCatchStatement t;
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bool ok = CppExceptions::parseTryCatch("if (x) { doWork(); }", t);
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CHECK(!ok, "parse should fail without try/catch");
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PASS();
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}
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int main() {
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std::cout << "Step 467: Exception Handling Tests\n";
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test_parse_try_with_single_typed_catch(); // 1
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test_parse_try_with_multiple_catches(); // 2
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test_parse_catch_all_clause(); // 3
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test_parse_throw_expression(); // 4
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test_detect_noexcept_true(); // 5
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test_detect_noexcept_false(); // 6
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test_try_catch_json_roundtrip(); // 7
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test_throw_json_roundtrip(); // 8
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test_project_to_rust_result_match(); // 9
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test_project_to_python_try_except(); // 10
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test_project_to_go_err_check(); // 11
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test_invalid_try_catch_parse_fails(); // 12
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std::cout << "\nResults: " << passed << "/" << (passed + failed)
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<< " passed\n";
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return failed == 0 ? 0 : 1;
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}
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38
progress.md
38
progress.md
@@ -6287,3 +6287,41 @@ projection of range loops.
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**Architecture gate check:**
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- `editor/src/ast/CppRangeStructured.h` within header-size limit (`150` <= `600`)
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- `editor/tests/step466_test.cpp` within test-file size guidance (`163` lines)
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### Step 467: Exception Handling
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**Status:** PASS (12/12 tests)
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Adds C++ exception-handling gap coverage for try/catch clauses, throw
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expressions, noexcept detection, JSON round-trip, and cross-language exception
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model projections.
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**Files added:**
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- `editor/src/ast/CppExceptions.h` — exception helper model:
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- `TryCatchStatement`, `CatchClause`, `ThrowExpression`
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- parse helpers:
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- `parseTryCatch(...)`
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- `parseThrowExpression(...)`
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- `hasNoexcept(...)`
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- JSON round-trip helpers for try/catch and throw expression
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- projections:
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- C++ try/catch → Rust `Result`/`match`
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- C++ try/catch → Python `try/except`
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- C++ try/catch → Go `if err != nil`
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- `editor/tests/step467_test.cpp` — 12 tests covering:
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- single and multi-catch parsing
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- catch-all parsing
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- throw expression parsing
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- noexcept detection
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- JSON round-trip
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- Rust/Python/Go projection checks
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- invalid parse failure behavior
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- `editor/CMakeLists.txt` — `step467_test` target
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**Verification run:**
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- `cmake --build editor/build-native --target step467_test` — PASS
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- `./editor/build-native/step467_test` — PASS (12/12)
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- `./editor/build-native/step466_test` — PASS (12/12) regression coverage
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**Architecture gate check:**
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- `editor/src/ast/CppExceptions.h` within header-size limit (`178` <= `600`)
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- `editor/tests/step467_test.cpp` within test-file size guidance (`148` lines)
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