ast::ScopeID Class Reference

Immutable struct that represents a unique identifier for a scope. This captures the position of the lexical scope in the AST to be used after AST construction, when lexical information has been lost. More...

#include <AstNode.h>

Public Member Functions
ScopeID const *	next (BumpAllocator &alloc, ScopeID const *parent) const
	Move on to the next declaration in the given scope. More...
bool	canView (ScopeID const *other) const
	Returns true if we can view the "other" scope from this scope. More...
const ScopeID *	parent () const
std::string	toString () const
std::ostream &	print (std::ostream &os) const
void	dump () const

Static Public Member Functions
static const ScopeID *	New (BumpAllocator &alloc)

Friends
std::ostream &	operator<< (std::ostream &os, const ScopeID &id)

Detailed Description

Immutable struct that represents a unique identifier for a scope. This captures the position of the lexical scope in the AST to be used after AST construction, when lexical information has been lost.

Definition at line 349 of file AstNode.h.

Member Function Documentation

canView()

bool ast::ScopeID::canView

(

ScopeID const *

other

)

const

Returns true if we can view the "other" scope from this scope.

Parameters

other

The other scope we want to view

Definition at line 24 of file ScopeID.cc.

                                                {
   assert(other != nullptr && "Can't view the null scope");
   // If under same scope, we can view other iff we are later position
   if(this->parent_ == other->parent_) {
      return this->pos_ >= other->pos_;
   }
   // If under different scope, check if other is visible from parent
   if(this->parent_) {
      return this->parent_->canView(other);
   }
   // If we're the topmost scope, then other is a child we cannot see.
   return false;
}

References canView().

Referenced by canView().

next()

ScopeID const* ast::ScopeID::next ( BumpAllocator &  alloc, ScopeID const *  parent  ) const

inline

Move on to the next declaration in the given scope.

Parameters

alloc	The allocator to allocate the new scope
parent	The parent scope

Returns

ScopeID const* The ScopeID for this declaration

Definition at line 361 of file AstNode.h.

                                                                          {
      void* mem = alloc.allocate_bytes(sizeof(ScopeID), alignof(ScopeID));
      return new(mem) ScopeID{parent, pos_ + 1};
   }

Referenced by ast::Semantic::EnterLexicalScope(), and ast::Semantic::ExitLexicalScope().

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The documentation for this class was generated from the following files:

• include/ast/AstNode.h
• lib/ast/ScopeID.cc