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129 lines (104 loc) · 4.81 KB
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using System.Collections.ObjectModel;
using DotPython.Language.Ast;
using DotPython.Language.Text;
namespace DotPython.Compiler.Binding;
public sealed class PythonBoundScope
{
private readonly IList<string> _cellVariableNames;
private readonly Dictionary<string, int> _cellVariableIndexes;
private readonly HashSet<string> _cellVariableNameSet;
private readonly IList<string> _freeVariableNames;
private readonly Dictionary<string, int> _freeVariableIndexes;
private readonly HashSet<string> _freeVariableNameSet;
private readonly HashSet<string> _localNameSet;
private readonly Dictionary<string, int> _localNameIndexes;
internal PythonBoundScope(
PythonScopeKind kind,
string name,
PythonNode? definition,
IList<string> parameters,
IList<string> localNames,
IList<string> referencedNames,
IList<string> cellVariableNames,
IList<string> freeVariableNames,
IList<PythonBoundScope> children,
IReadOnlyDictionary<string, TextSpan> declaredGlobalNames,
IReadOnlyDictionary<string, TextSpan> declaredNonlocalNames
)
{
Kind = kind;
Name = name;
Definition = definition;
DeclaredGlobalNames = declaredGlobalNames;
DeclaredNonlocalNames = declaredNonlocalNames;
Parameters = new ReadOnlyCollection<string>(parameters);
LocalNames = new ReadOnlyCollection<string>(localNames);
ReferencedNames = new ReadOnlyCollection<string>(referencedNames);
CellVariableNames = new ReadOnlyCollection<string>(cellVariableNames);
FreeVariableNames = new ReadOnlyCollection<string>(freeVariableNames);
_cellVariableNames = cellVariableNames;
_freeVariableNames = freeVariableNames;
Children = new ReadOnlyCollection<PythonBoundScope>(children);
_localNameSet = new HashSet<string>(localNames, StringComparer.Ordinal);
_localNameIndexes = localNames
.Select((localName, index) => (localName, index))
.ToDictionary(item => item.localName, item => item.index, StringComparer.Ordinal);
_cellVariableNameSet = new HashSet<string>(cellVariableNames, StringComparer.Ordinal);
_cellVariableIndexes = cellVariableNames
.Select((name, index) => (name, index))
.ToDictionary(item => item.name, item => item.index, StringComparer.Ordinal);
_freeVariableNameSet = new HashSet<string>(freeVariableNames, StringComparer.Ordinal);
_freeVariableIndexes = freeVariableNames
.Select((name, index) => (name, index))
.ToDictionary(item => item.name, item => item.index, StringComparer.Ordinal);
}
public PythonScopeKind Kind { get; }
public string Name { get; }
public IReadOnlyList<string> Parameters { get; }
public IReadOnlyList<string> LocalNames { get; }
public IReadOnlyList<string> ReferencedNames { get; }
public IReadOnlyList<string> CellVariableNames { get; }
public IReadOnlyList<string> FreeVariableNames { get; }
public IReadOnlyList<PythonBoundScope> Children { get; }
internal PythonNode? Definition { get; }
internal IReadOnlyDictionary<string, TextSpan> DeclaredGlobalNames { get; }
internal IReadOnlyDictionary<string, TextSpan> DeclaredNonlocalNames { get; }
internal bool IsDeclaredGlobal(string name) => DeclaredGlobalNames.ContainsKey(name);
internal bool IsLocal(string name) => _localNameSet.Contains(name);
internal int GetLocalIndex(string name) => _localNameIndexes[name];
internal bool IsCellVariable(string name) => _cellVariableNameSet.Contains(name);
internal bool IsFreeVariable(string name) => _freeVariableNameSet.Contains(name);
internal int GetCellVariableIndex(string name) => _cellVariableIndexes[name];
internal int GetFreeVariableIndex(string name) => _freeVariableIndexes[name];
internal void AddCellVariable(string name)
{
if (_cellVariableNameSet.Add(name))
{
_cellVariableIndexes.Add(name, _cellVariableNames.Count);
_cellVariableNames.Add(name);
}
}
internal void AddFreeVariable(string name)
{
if (_freeVariableNameSet.Add(name))
{
_freeVariableIndexes.Add(name, _freeVariableNames.Count);
_freeVariableNames.Add(name);
}
}
internal void OrderCellVariablesByLocalDeclaration()
{
if (_cellVariableNames.Count < 2)
{
return;
}
var orderedNames = LocalNames.Where(_cellVariableNameSet.Contains).ToArray();
_cellVariableNames.Clear();
_cellVariableIndexes.Clear();
for (var index = 0; index < orderedNames.Length; index++)
{
_cellVariableNames.Add(orderedNames[index]);
_cellVariableIndexes.Add(orderedNames[index], index);
}
}
}