Started adding some (anti-)regression tests

Author: hsutter

regression-tests/mixed-allcpp1-hello.cpp2

@@ -0,0 +1,15 @@
+
+//  Step 1: rename .cpp to .cpp2
+
+#include <iostream>
+#include <string>
+
+#pragma auto_inline(on)
+
+//  Here's a sample Syntax 1 "Hello world"...
+
+auto main() -> int
+{
+    auto s = std::string{"world\n"};
+    std::cout << "Hello " << s;
+}

regression-tests/mixed-hello.cpp2

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+
+#include <iostream>
+#include <string>
+
+name: () -> std::string = {
+    s: std::string = "world";
+    decorate(s);
+    return s;
+}
+
+decorate: (inout s: std::string) = {
+    s = "[" + s + "]";
+}
+
+auto main() -> int {
+    // name();
+    std::cout << "Hello " << name() << "\n";
+}

regression-tests/pure2-hello.cpp2

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+
+main: () -> int = {
+    std::cout << "Hello " << name() << "\n";
+}
+
+name: () -> std::string = {
+    s: std::string = "world";
+    decorate(s);
+    return s;
+}
+
+decorate: (inout s: std::string) = {
+    s = "[" + s + "]";
+}

regression-tests/run-tests.bat

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+@echo off
+copy ..\*.cpp2 .
+for %%f in (mixed-*.cpp2) do (
+    echo Starting cppfront.exe %%f
+    C:\GitHub\cppfront\x64\Debug\cppfront.exe %%f > %%f-output
+)
+for %%f in (pure2-*.cpp2) do (
+    echo Starting cppfront.exe %%f -p
+    C:\GitHub\cppfront\x64\Debug\cppfront.exe %%f -p > %%f-output
+)
+echo Done

regression-tests/test-results/mixed-allcpp1-hello.cpp

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+
+//  Step 1: rename .cpp to .cpp2
+
+#include <iostream>
+#include <string>
+
+#pragma auto_inline(on)
+
+//  Here's a sample Syntax 1 "Hello world"...
+
+auto main() -> int
+{
+    auto s = std::string{"world\n"};
+    std::cout << "Hello " << s;
+}

regression-tests/test-results/mixed-allcpp1-hello.cpp2

@@ -0,0 +1,15 @@
+
+//  Step 1: rename .cpp to .cpp2
+
+#include <iostream>
+#include <string>
+
+#pragma auto_inline(on)
+
+//  Here's a sample Syntax 1 "Hello world"...
+
+auto main() -> int
+{
+    auto s = std::string{"world\n"};
+    std::cout << "Hello " << s;
+}

regression-tests/test-results/mixed-allcpp1-hello.cpp2-output

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+cppfront 0.1.1 compiler
+Copyright (C) Herb Sutter
+mixed-allcpp1-hello.cpp2... ok (all Cpp1)
+

regression-tests/test-results/mixed-hello.cpp

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+// ----- Cpp2 support -----
+#include "cpp2util.h"
+
+#line 1 "mixed-hello.cpp2"
+
+#include <iostream>
+#include <string>
+
+[[nodiscard]] auto name() noexcept -> std::string;
+#line 11 "mixed-hello.cpp2"
+auto decorate(std::string& s) noexcept -> void;
+#line 14 "mixed-hello.cpp2"
+
+auto main() -> int {
+    // name();
+    std::cout << "Hello " << name() << "\n";
+}
+
+//=== Cpp2 definitions ==========================================================
+
+#line 4 "mixed-hello.cpp2"
+
+[[nodiscard]] auto name() noexcept -> std::string{
+    std::string s { "world" }; 
+    decorate(s);
+    return s; 
+}
+
+auto decorate(std::string& s) noexcept -> void{
+    s = "[" + s + "]";
+}

regression-tests/test-results/mixed-hello.cpp2

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+
+#include <iostream>
+#include <string>
+
+name: () -> std::string = {
+    s: std::string = "world";
+    decorate(s);
+    return s;
+}
+
+decorate: (inout s: std::string) = {
+    s = "[" + s + "]";
+}
+
+auto main() -> int {
+    // name();
+    std::cout << "Hello " << name() << "\n";
+}

regression-tests/test-results/mixed-hello.cpp2-output

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+cppfront 0.1.1 compiler
+Copyright (C) Herb Sutter
+mixed-hello.cpp2... ok (mixed Cpp1/Cpp2, Cpp2 code passes safety checks)
+