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Use const char* const* over const char** (#1005)

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The FFI difference becomes significant in languages like Rust where you
can't necessarily just cast a const pointer.
This commit is contained in:
LoganDark 2023-08-07 13:45:04 -07:00 committed by GitHub
parent 0b2755f964
commit 2b03c8f72a
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5 changed files with 6 additions and 6 deletions
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2
Compiler/include/Luau/Compiler.h
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@ -39,7 +39,7 @@ struct CompileOptions
const char* vectorType = nullptr;
// null-terminated array of globals that are mutable; disables the import optimization for fields accessed through these
const char** mutableGlobals = nullptr;
const char* const* mutableGlobals = nullptr;
};
class CompileError : public std::exception

2
Compiler/include/luacode.h
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@ -35,7 +35,7 @@ struct lua_CompileOptions
const char* vectorType;
// null-terminated array of globals that are mutable; disables the import optimization for fields accessed through these
const char** mutableGlobals;
const char* const* mutableGlobals;
};
// compile source to bytecode; when source compilation fails, the resulting bytecode contains the encoded error. use free() to destroy

4
Compiler/src/ValueTracking.cpp
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@ -82,13 +82,13 @@ struct ValueVisitor : AstVisitor
}
};
void assignMutable(DenseHashMap<AstName, Global>& globals, const AstNameTable& names, const char** mutableGlobals)
void assignMutable(DenseHashMap<AstName, Global>& globals, const AstNameTable& names, const char* const* mutableGlobals)
{
if (AstName name = names.get("_G"); name.value)
globals[name] = Global::Mutable;
if (mutableGlobals)
for (const char** ptr = mutableGlobals; *ptr; ++ptr)
for (const char* const* ptr = mutableGlobals; *ptr; ++ptr)
if (AstName name = names.get(*ptr); name.value)
globals[name] = Global::Mutable;
}

2
Compiler/src/ValueTracking.h
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@ -28,7 +28,7 @@ struct Variable
bool constant = false; // is the variable's value a compile-time constant? filled by constantFold
};
void assignMutable(DenseHashMap<AstName, Global>& globals, const AstNameTable& names, const char** mutableGlobals);
void assignMutable(DenseHashMap<AstName, Global>& globals, const AstNameTable& names, const char* const* mutableGlobals);
void trackValues(DenseHashMap<AstName, Global>& globals, DenseHashMap<AstLocal*, Variable>& variables, AstNode* root);
inline Global getGlobalState(const DenseHashMap<AstName, Global>& globals, AstName name)

2
tests/Compiler.test.cpp
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@ -4213,7 +4213,7 @@ RETURN R0 0
bcb.setDumpFlags(Luau::BytecodeBuilder::Dump_Code);
Luau::CompileOptions options;
const char* mutableGlobals[] = {"Game", "Workspace", "game", "plugin", "script", "shared", "workspace", NULL};
options.mutableGlobals = &mutableGlobals[0];
options.mutableGlobals = mutableGlobals;
Luau::compileOrThrow(bcb, source, options);
CHECK_EQ("\n" + bcb.dumpFunction(0), R"(