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Progress on docs, adjustments
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@ -14,7 +14,7 @@ If using the library's provided build scripts:
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.\build.ps1 <compiler> <debug or omit> base
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```
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Standard formats:
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## Content Overview
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* **base**: Files are in granular pieces separated into four directories:
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* **dependencies**: Originally from the c-zpl library and modified thereafter.
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@ -123,15 +123,15 @@ The vast majority of macros should be single-line subsitutions that either add:
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There are ***five*** header files which are automatically generated using [base_codegen.hpp](./helpers/base_codegen.hpp) by [base.cpp](./base.cpp). They are all located in [components/gen](./components/gen/).
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* [`ecodetypes.hpp`](./components/gen/ecode.hpp): `CodeType` enum definition and related implementaiton. Generation is based off of [`ECodeType.csv](./enums/ECodeTypes.csv).
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* [`especifier.hpp`](./components/gen/especifier.hpp): `Specifier` enum definition, etc. Generated using [`ESpecifier.csv`](./enums/ESpecifier.csv).
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* [`eoperator.hpp`](./components/gen/eoperator.hpp): `Operator` enum definition, etc. Generated using [`EOperator.hpp`](./enums/EOperator.csv).
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* [`etoktype.cpp`](./components/gen/etoktype.cpp): `TokType` enum defininition, etc. Used by the lexer and parser backend. Uses two csvs:
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* [`ETokType.csv`](./enums/ETokType.csv): Provides the enum entries and their strinng ids.
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* [`AttributeTokens.csv`](./enums/AttributeTokens.csv): Provides tokens entries that should be considered as attributes by the lexer and parser. Sspecfiically macro attributes such as those use for exporting symbols.
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* [`ast_inlines.hpp`](./components/gen/ast_inlines.hpp): Member trivial `operator` definitions for C++ code types. Does not use a csv.
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* [ecodetypes.hpp](./components/gen/ecode.hpp): `CodeType` enum definition and related implementaiton. Generation is based off of [ECodeType.csv](./enums/ECodeTypes.csv).
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* [especifier.hpp](./components/gen/especifier.hpp): `Specifier` enum definition, etc. Generated using [ESpecifier.csv](./enums/ESpecifier.csv).
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* [eoperator.hpp](./components/gen/eoperator.hpp): `Operator` enum definition, etc. Generated using [EOperator.hpp](./enums/EOperator.csv).
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* [etoktype.cpp](./components/gen/etoktype.cpp): `TokType` enum defininition, etc. Used by the lexer and parser backend. Uses two csvs:
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* [ETokType.csv](./enums/ETokType.csv): Provides the enum entries and their strinng ids.
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* [AttributeTokens.csv](./enums/AttributeTokens.csv): Provides tokens entries that should be considered as attributes by the lexer and parser. Sspecfiically macro attributes such as those use for exporting symbols.
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* [ast_inlines.hpp](./components/gen/ast_inlines.hpp): Member trivial `operator` definitions for C++ code types. Does not use a csv.
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[`misc.hpp`](./helpers/misc.hpp): Has shared functions used by the library generation meta-programs throughout this codebase.
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[misc.hpp](./helpers/misc.hpp): Has shared functions used by the library generation meta-programs throughout this codebase.
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If using the library's provided build scripts:
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@ -160,9 +160,53 @@ Names or Content fields are interned strings and thus showed be cached using `ca
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`def_operator` is the most sophisticated upfront constructor as it has multiple permutations of definitions that could be created that are not trivial to determine if valid.
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The parser is documented under [`docs/Parsing.md`](../docs/Parsing.md) and [`docs/Parser_Algo.md`](../docs/Parser_Algo.md).
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The parser is documented under [`docs/Parsing.md`](../docs/Parsing.md) and [`docs/Parser_Algo.md`](../docs/Parser_Algo.md). Read that and the entire library if you want to extend it.
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### Attributes
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To add additional macro attributes, all that has to be done is modifying [`AttributeTokens.csv`](./enums/AttributeTokens.csv).
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### Specifiers
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To add additional macro specifiers, the following needs to be done:
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1. Adjust [especifier.hpp](./components/gen/especifier.hpp)
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2. Adjust [etoktype.cpp](./components/gen/etoktype.cpp)
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3. Adjust [parser_case_macros.cpp](./components/parser_case_macros.cpp)
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If the specifier is a new trailing specifier on function definitions:
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Head into [base_codegen.hpp](./helpers/base_codegen.hpp): `gen_especifier`. There will be an `is_trailing` function that needs to be adjusted with an additional case for the user's new trailing specifier.
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### Code Types
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These require the following to be handled to the equivalent extent as the other types:
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1. Adjust [ECodeTypes.csv](./enums/ECodeTypes.csv) with the new types
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2. Define a new `AST_<Name>` and `Code<Name>`. See
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* [ast.hpp](./components/ast.hpp): Initial forwards and user defined conversion for Code.
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* [ast_types.hpp](./components/ast_types.hpp): Define the `AST_<Name>` struct.
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* [code_types.hpp](./components/code_types.hpp): Defne the `CodeType` struct. If its needs an iterator see: `struct CodeBody` & `struct CodeParams`.
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3. [ast_case_macros.cpp](./components/ast_case_macros.cpp): Review cases here if the new code type needs to be considered.
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4. [ast.cpp](./components/ast.cpp): Need to review
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* `code_debug_str`
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* `code_is_equal`
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* `code_to_strbuilder_ptr`
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* `code_validate_body`
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5. [code_serialization.cpp](./components/code_serialization.cpp): Define serialization here.
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6. [inlines.hpp](./components/inlines.hpp): Any inline definitions for the `struct Code<Name>` are defined here.
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7. [interface.cpp](./components/interface.hpp): Define the `Code<Name>` upfront and parsing interface.
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8. [interface.upfront.cpp](./components/interface.upfront.cpp): Define the upfront constructor implementation.
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9. [interface.parsing.cpp](./components/interface.parsing.cpp): Define the parsing interface implementation.
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10. [lexer.cpp](./components/lexer.cpp): Adjust the lexer as needed.
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11. [parser.cpp](./components/parser.cpp): Adjust the parser as needed.
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## A note on compilation and runtime generation speed
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The library is designed to be fast to compile and generate code at runtime as fast as resonable possible on a debug build.
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The library is designed to be fast to compile and generate code at runtime as fast as possible on a debug build.
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Its recommended that your metaprogam be compiled using a single translation unit (unity build).
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## Whats with the expression / executions support #ifd and enums?
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The library is a *work in progress* and those are unfinished hypotheticals for adding the ability to manage or parse the AST of expresions or execution scope code.
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They are entirely untested and not meant to be used yet, futher there is no parsing support or an upfront interface for what CodeTypes are defined so far.
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@ -1,6 +1,5 @@
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#define GEN_DEFINE_LIBRARY_CODE_CONSTANTS
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#define GEN_ENFORCE_STRONG_CODE_TYPES
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#define GEN_EXPOSE_BACKEND
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#define GEN_C_LIKE_CPP 1
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#include "gen.cpp"
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#include "helpers/push_ignores.inline.hpp"
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@ -72,7 +72,18 @@ inline Str spec_to_str( Specifier type )
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inline bool spec_is_trailing( Specifier specifier )
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{
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return specifier > Spec_Virtual;
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switch (specifier) {
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case Spec_Const:
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case Spec_Final:
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case Spec_NoExceptions:
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case Spec_Override:
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case Spec_Pure:
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case Spec_Volatile:
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return true;
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default:
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return false;
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}
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}
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inline Specifier str_to_specifier( Str str )
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@ -214,7 +214,18 @@ CodeBody gen_especifier( char const* path, bool use_c_definition = false )
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inline
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bool spec_is_trailing( Specifier specifier )
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{
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return specifier > Spec_Virtual;
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switch (specifier) {
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case Spec_Const:
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case Spec_Final:
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case Spec_NoExceptions:
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case Spec_Override:
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case Spec_Pure:
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case Spec_Volatile:
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return true;
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default:
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return false;
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}
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}
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)));
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@ -2,7 +2,6 @@
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#define GEN_DEFINE_LIBRARY_CODE_CONSTANTS
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#define GEN_ENFORCE_STRONG_CODE_TYPES
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#define GEN_EXPOSE_BACKEND
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#include "gen.cpp"
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#include "helpers/push_ignores.inline.hpp"
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@ -8,11 +8,13 @@
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# Segemented Library Generation
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Create a segemented library using `segemented.cpp`
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The principal (user) files are `gen.hpp` and `gen.cpp`.
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They contain includes for its various components: `components/<component_name>.<hpp/cpp>`
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Dependencies are bundled into `gen.dep.<hpp/cpp>`. They are included in `gen.<hpp/cpp>` before component includes.
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Just like the `gen.<hpp/cpp>` they include their components: `dependencies/<dependency_name>.<hpp/cpp>`
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Just like the `gen.<hpp/cpp>` they include their components: `dependencies/<dependency_name>.<hpp/cpp>`. The auxillary content (builder & scanner) is given their own files.
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If using the library's provided build scripts:
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@ -2,7 +2,6 @@
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#define GEN_DEFINE_LIBRARY_CODE_CONSTANTS
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#define GEN_ENFORCE_STRONG_CODE_TYPES
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#define GEN_EXPOSE_BACKEND
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#define GEN_C_LIKE_CPP 1
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#include "gen.cpp"
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#include "helpers/push_ignores.inline.hpp"
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#define GEN_DEFINE_LIBRARY_CODE_CONSTANTS
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#define GEN_ENFORCE_STRONG_CODE_TYPES
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#define GEN_EXPOSE_BACKEND
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#include "gen.cpp"
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#include "helpers/push_ignores.inline.hpp"
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```ps1
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.\build.ps1 <compiler> <debug or omit> unreal
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```
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## Notables
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For the most part this follows the same conventions as `gen_segmented`.
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This generator uses a separate enumeration definitions for the following:
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* [AttributeTokens.csv](./enums/AttributeTokens.csv) : Add your own <MODULE>_API attributes, etc here that are encountered within the Engine.
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* [ESpecifier.csv](./enums/ESpecifier.csv) : Adds the `FORCEINLINE` & `FORCEINLINE_DEBUGGABLE` specfiers (additions are made as they are encountered)
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* [ETokType.csv](./enums/ETokType.csv) : Same modifications as ESpecifier.csv.
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A separate [parser_case_macros.cpp](./components/parser_case_macros.cpp) is used to accomodate for the new forceinline specifiers.
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The `global` macro the library uses is redefined as an empty substiution.
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The expected usage of this library is to put into into a third-party plugin module to then use either in editor modules or in shell script done in some stage of hot-reloading or building the Unreal Engine or Project.
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BraceCurly_Close, "}"
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BraceSquare_Open, "["
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BraceSquare_Close, "]"
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Capture_Start, "("
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Capture_End, ")"
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Paren_Open, "("
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Paren_Close, ")"
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Comment, "__comment__"
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Comment_End, "__comment_end__"
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Comment_Start, "__comment_start__"
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#define GEN_DEFINE_LIBRARY_CODE_CONSTANTS
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#define GEN_ENFORCE_STRONG_CODE_TYPES
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#define GEN_EXPOSE_BACKEND
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#include "gen.cpp"
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#include "helpers/push_ignores.inline.hpp"
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