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#pragma once
#include "repr.h"
#include <functional>
struct Visitor {
std::function<void(const Type &, const std::shared_ptr<Context> ctx)> onType = [](auto, auto){};
std::function<void(const Expr &, const std::shared_ptr<Context> ctx)> onExpr = [](auto, auto){};
std::function<void(const Stmt &, const std::shared_ptr<Context> ctx)> onStmt = [](auto, auto){};
std::function<void(const Body &, const std::shared_ptr<Context> ctx)> onBody = [](auto, auto){};
std::function<void(const Function &, const std::shared_ptr<Context> ctx)> onFunction = [](auto, auto){};
std::function<void(const Variable &, const std::shared_ptr<Context> ctx)> onVariable = [](auto, auto){};
std::function<void(const StructMember<Function> &, const std::shared_ptr<Context> ctx)> onStructMethod = [](auto, auto){};
std::function<void(const StructMember<Variable> &, const std::shared_ptr<Context> ctx)> onStructMember = [](auto, auto){};
std::function<void(const Struct &, const std::shared_ptr<Context> ctx)> onStruct = [](auto, auto){};
std::function<void(const Namespace &, const std::shared_ptr<Context> ctx)> onNamespace = [](auto, auto){};
std::function<void(const Program &, const std::shared_ptr<Context> ctx)> onProgram = [](auto, auto){};
};
#define VISIT(XS) for (auto x : XS) visit(x);
struct Visit {
private:
Visitor v;
std::shared_ptr<Context> ctx;
public:
Visit(Visitor v)
{
this->v = v;
}
void visit(const Type & x)
{
v.onType(x, ctx);
}
void visit(const Expr & x)
{
v.onExpr(x, ctx);
switch (x.type)
{
case ExprType::Func:
VISIT(x._func.arguments)
break;
case ExprType::Method:
visit(*x._method.expr);
VISIT(x._method.arguments);
break;
case ExprType::Lit:
break;
case ExprType::Paren:
visit(*x._paren.expr);
break;
case ExprType::Dot:
visit(*x._dot.expr);
break;
case ExprType::PrefixOp:
visit(*x._prefixOp.expr);
break;
case ExprType::PostfixOp:
visit(*x._postfixOp.expr);
break;
case ExprType::BinaryOp:
visit(*x._binaryOp.lexpr);
visit(*x._binaryOp.rexpr);
break;
case ExprType::TernaryOp:
visit(*x._ternaryOp.lexpr);
visit(*x._ternaryOp.rexprTrue);
visit(*x._ternaryOp.rexprFalse);
break;
case ExprType::Bracket:
visit(*x._brackets.lexpr);
visit(*x._brackets.rexpr);
break;
case ExprType::Identifier:
break;
}
}
void visit(const Stmt & x)
{
v.onStmt(x, ctx);
switch (x.type)
{
case StmtType::Assign:
visit(x._assign.lexpr);
visit(x._assign.rexpr);
break;
case StmtType::Expr:
visit(x._expr);
break;
case StmtType::For:
visit(x._for.init->lexpr);
visit(x._for.init->rexpr);
visit(*x._for.condition);
visit(*x._for.action);
visit(x._for.body);
break;
case StmtType::If:
visit(x._if.condition);
visit(x._if.body);
for (auto e : x._if.elses)
{
if (e._if)
visit(*e.expr);
visit(e.body);
}
break;
case StmtType::Return:
visit(x._return.expr);
break;
case StmtType::Switch:
visit(*x._switch.ident);
for (auto c : x._switch.cases)
{
visit(*c.expr);
visit(c.body);
}
break;
case StmtType::While:
visit(x._while.condition);
visit(x._while.body);
break;
}
}
void visit(const Body & x)
{
v.onBody(x, ctx);
ctx = x.ctx;
VISIT(x.ctx->variables)
VISIT(x.statements)
ctx = ctx->parent;
}
void visit(const Namespace & x)
{
v.onNamespace(x, ctx);
ctx = x.ctx;
VISIT(x.ctx->namespaces)
VISIT(x.ctx->variables)
VISIT(x.ctx->structs)
VISIT(x.ctx->functions)
ctx = ctx->parent;
}
void visit(const Variable & x)
{
v.onVariable(x, ctx);
visit(x.type);
}
void visit(const Function & x)
{
v.onFunction(x, ctx);
if (x.defined) {
visit(x.body);
for (auto v : x.parameters)
visit(v.type);
}
}
void visit(const StructMember<Function> & x)
{
v.onStructMethod(x, ctx);
visit(x.t);
}
void visit(const StructMember<Variable> & x)
{
v.onStructMember(x, ctx);
visit(x.t);
}
void visit(const Struct & x)
{
v.onStruct(x, ctx);
VISIT(x.members)
VISIT(x.methods)
}
void visit(const Program & x)
{
v.onProgram(x, ctx);
ctx = x.ctx;
VISIT(x.ctx->namespaces)
VISIT(x.ctx->variables)
VISIT(x.ctx->structs)
VISIT(x.ctx->functions)
ctx = nullptr;
}
};
#undef VISIT
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