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// Preprocessor.h
#ifndef SLANG_PREPROCESSOR_H_INCLUDED
#define SLANG_PREPROCESSOR_H_INCLUDED
#include "../core/slang-basic.h"
#include "../compiler-core/slang-lexer.h"
#include "../compiler-core/slang-include-system.h"
namespace Slang {
class DiagnosticSink;
class Linkage;
namespace preprocessor
{
struct Preprocessor;
}
using preprocessor::Preprocessor;
/// A handler for callbacks invoked by the preprocessor.
///
/// A client of the preprocessor can implement its own `PreprocessorHandler` subtype
/// in order to insert custom logic that implements higher-level policies
/// that the preprocessor shouldn't need to understand.
///
struct PreprocessorHandler
{
virtual void handleEndOfTranslationUnit(Preprocessor* preprocessor);
virtual void handleFileDependency(String const& path);
};
/// Description of a preprocessor options/dependencies
struct PreprocessorDesc
{
/// Required: sink to use when emitting preprocessor diagnostic messages
DiagnosticSink* sink = nullptr;
/// Required: name pool to use when creating `Name`s from strings
NamePool* namePool = nullptr;
/// Required: file system to use when looking up files
ISlangFileSystemExt* fileSystem = nullptr;
/// Required: source manager to use when loading source files
SourceManager* sourceManager = nullptr;
/// Optional: include system to use when resolving `#include` directives
IncludeSystem* includeSystem = nullptr;
/// Optional: preprocessor `#define`s to assume are set on input
Dictionary<String, String> const* defines = nullptr;
/// Optional: handler for callbacks invoked during preprocessing
PreprocessorHandler* handler = nullptr;
};
/// Take a source `file` and preprocess it into a list of tokens.
TokenList preprocessSource(
SourceFile* file,
PreprocessorDesc const& desc);
/// Convenience wrapper for `preprocessSource` when a `Linkage` is available
TokenList preprocessSource(
SourceFile* file,
DiagnosticSink* sink,
IncludeSystem* includeSystem,
Dictionary<String, String> const& defines,
Linkage* linkage,
PreprocessorHandler* handler = nullptr);
// The following functions are intended to be used inside of implementations
// of the `PreprocessorHandler` interface, in order to query the current
// state of the preprocessor.
/// Try to look up a macro with the given `macroName` and produce its value as a string
Result findMacroValue(
Preprocessor* preprocessor,
char const* macroName,
String& outValue,
SourceLoc& outLoc);
} // namespace Slang
#endif
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