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#pragma once
#include "Decl.h"
#include "Compiler/Type.h"
#include "Compiler/Scope.h"
#include "Compiler/Basic/Param.h"
namespace storm {
namespace syntax {
STORM_PKG(lang.bnf);
/**
* A syntax rule.
*
* A rule is represented in the type system as a type. All productions specifying this rule
* inherit from this type, providing access to whatever was matched. The base class provides
* a member 'transform' for transforming the syntax tree as specified in the syntax file.
*/
class Rule : public Type {
STORM_CLASS;
public:
// Create the rule.
STORM_CTOR Rule(RuleDecl *rule, Scope scope);
// Scope.
Scope scope;
// Get parameters and result.
Array<bs::ValParam> *STORM_FN params();
Value STORM_FN result();
// Default color of the token when used in a rule.
TokenColor color;
protected:
// Lazy-loading.
virtual Bool STORM_FN loadAll();
private:
// Rule declaration. Set to 'null' when it has been loaded.
RuleDecl *decl;
// Parameters to the transform function.
Array<bs::ValParam> *tfmParams;
// Result from the transform function.
Value tfmResult;
// Initialize parameters and result.
void initTypes();
// Generate the transform function.
CodeGen *CODECALL createTransform();
};
}
}
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