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/* -------------------------------------------
Copyright (C) 2024-2025 Amlal EL Mahrous, all rights reserved
------------------------------------------- */
#pragma once
#include <LibCompiler/AssemblyInterface.h>
namespace LibCompiler {
inline auto kInvalidFrontend = "NA";
/// @brief Compiler backend, implements a frontend, such as C, C++...
/// See Toolchain, for some examples.
class ICompilerFrontend {
public:
explicit ICompilerFrontend() = default;
virtual ~ICompilerFrontend() = default;
LIBCOMPILER_COPY_DEFAULT(ICompilerFrontend);
// NOTE: cast this to your user defined ast.
typedef void* AstType;
//! @brief Compile a syntax tree ouf of the text.
//! Also takes the source file name for metadata.
virtual bool Compile(std::string text, std::string file) = 0;
//! @brief What language are we dealing with?
virtual const char* Language() { return kInvalidFrontend; }
virtual bool IsValid() { return strcmp(this->Language(), kInvalidFrontend) > 0; }
};
struct SyntaxLeafList;
struct SyntaxLeafList;
struct CompilerKeyword;
/// we want to do that because to separate keywords.
enum KeywordKind {
kKeywordKindNamespace,
kKeywordKindFunctionStart,
kKeywordKindFunctionEnd,
kKeywordKindVariable,
kKeywordKindVariablePtr,
kKeywordKindType,
kKeywordKindTypePtr,
kKeywordKindExpressionBegin,
kKeywordKindExpressionEnd,
kKeywordKindArgSeparator,
kKeywordKindBodyStart,
kKeywordKindBodyEnd,
kKeywordKindClass,
kKeywordKindPtrAccess,
kKeywordKindAccess,
kKeywordKindIf,
kKeywordKindElse,
kKeywordKindElseIf,
kKeywordKindVariableAssign,
kKeywordKindVariableDec,
kKeywordKindVariableInc,
kKeywordKindConstant,
kKeywordKindTypedef,
kKeywordKindEndInstr,
kKeywordKindSpecifier,
kKeywordKindInvalid,
kKeywordKindReturn,
kKeywordKindCommentInline,
kKeywordKindCommentMultiLineStart,
kKeywordKindCommentMultiLineEnd,
kKeywordKindEq,
kKeywordKindNotEq,
kKeywordKindGreaterEq,
kKeywordKindLessEq,
kKeywordKindPtr,
};
/// \brief Compiler keyword information struct.
struct CompilerKeyword {
std::string keyword_name;
KeywordKind keyword_kind = kKeywordKindInvalid;
};
struct SyntaxLeafList final {
struct SyntaxLeaf final {
Int32 fUserType;
#ifdef LC_USE_STRUCTS
CompilerKeyword fUserData;
#else
std::string fUserData;
#endif
SyntaxLeaf() = default;
std::string fUserValue;
struct SyntaxLeaf* fNext;
};
std::vector<SyntaxLeaf> fLeafList;
SizeType fNumLeafs;
size_t SizeOf() { return fNumLeafs; }
std::vector<SyntaxLeaf>& Get() { return fLeafList; }
SyntaxLeaf& At(size_t index) { return fLeafList[index]; }
};
/// find the perfect matching word in a haystack.
/// \param haystack base string
/// \param needle the string we search for.
/// \return if we found it or not.
inline bool find_word(std::string haystack, std::string needle) noexcept {
auto index = haystack.find(needle);
// check for needle validity.
if (index == std::string::npos) return false;
// declare lambda
auto not_part_of_word = [&](int index) {
if (std::isspace(haystack[index]) || std::ispunct(haystack[index])) return true;
if (index <= 0 || index >= haystack.size()) return true;
return false;
};
return not_part_of_word(index - 1) && not_part_of_word(index + needle.size());
}
/// find a word within strict conditions and returns a range of it.
/// \param haystack
/// \param needle
/// \return position of needle.
inline std::size_t find_word_range(std::string haystack, std::string needle) noexcept {
auto index = haystack.find(needle);
// check for needle validity.
if (index == std::string::npos) return false;
if (!isalnum((haystack[index + needle.size() + 1])) &&
!isdigit(haystack[index + needle.size() + 1]) &&
!isalnum((haystack[index - needle.size() - 1])) &&
!isdigit(haystack[index - needle.size() - 1])) {
return index;
}
return false;
}
} // namespace LibCompiler
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