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#ifndef RUST_MACRO_EXPAND_H
#define RUST_MACRO_EXPAND_H
#include "rust-ast.h"
// Provides objects and method prototypes for macro expansion
namespace Rust {
// forward decls for AST
namespace AST {
class MacroInvocation;
}
// Object used to store configuration data for macro expansion.
struct ExpansionCfg
{
// features?
unsigned int recursion_limit = 50; // TODO: determine default recursion limit
// trace macros?
// should test?
// more default stuff?
};
// Object used to store shared data (between functions) for macro expansion.
struct MacroExpander
{
ExpansionCfg cfg;
unsigned int expansion_depth = 0;
MacroExpander (AST::Crate &crate, ExpansionCfg cfg, Session &session)
: cfg (cfg), crate (crate), session (session)
{}
~MacroExpander () = default;
// Expands all macros in the crate passed in.
void expand_crate ();
/* Expands a macro invocation (not macro invocation semi) - possibly make both
* have similar duck-typed interface and use templates?*/
// should this be public or private?
void expand_invoc (std::unique_ptr<AST::MacroInvocation> &invoc);
void expand_cfg_attrs (std::vector<AST::Attribute> &attrs);
bool fails_cfg (std::vector<AST::Attribute> &attr);
/* TODO: make it extend ASTVisitor so that individual items can be accessed
* properly? */
private:
AST::Crate &crate;
Session &session;
};
} // namespace Rust
#endif
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