/// <summary>
/// Gets the value of the specified symbol
/// </summary>
/// <param name="symbol">Symbol name</param>
/// <param name="scopeSymbolNames">Additional symbol name segments</param>
/// <param name="startFromGlobal">Should resolution start from global scope?</param>
/// <returns>
/// Null, if the symbol cannot be found; otherwise, the symbol's value
/// </returns>
public (ExpressionValue ExprValue, IHasUsageInfo UsageInfo) GetSymbolValue(string symbol,
List <string> scopeSymbolNames = null,
bool startFromGlobal = false)
{
var result = (scopeSymbolNames == null || scopeSymbolNames.Count == 0) && !startFromGlobal
? Module.ResolveSimpleSymbol(symbol)
: Module.ResolveCompoundSymbol(symbol, scopeSymbolNames, startFromGlobal);
return(result.ExprValue != null ? result : ParentContext.GetSymbolValue(symbol, scopeSymbolNames, startFromGlobal));
}
/// <summary>
/// Gets the value of the specified symbol
/// </summary>
/// <param name="symbol">Symbol name</param>
/// <param name="startFromGlobal">Should resolution start from global scope?</param>
/// <returns>
/// Null, if the symbol cannot be found; otherwise, the symbol's value
/// </returns>
public (ExpressionValue ExprValue, IHasUsageInfo UsageInfo) GetSymbolValue(string symbol,
bool startFromGlobal = false)
{
(ExpressionValue ExprValue, IHasUsageInfo UsageInfo)resolved;
if (startFromGlobal)
{
// --- Most be a compound symbol
resolved = Module.ResolveCompoundSymbol(symbol, true);
}
else if (symbol.Contains("."))
{
resolved = Module.ResolveCompoundSymbol(symbol, false);
if (resolved.ExprValue == null)
{
resolved = Module.ResolveSimpleSymbol(symbol);
}
}
else
{
resolved = Module.ResolveSimpleSymbol(symbol);
}
return(resolved.ExprValue != null ? resolved : ParentContext.GetSymbolValue(symbol, startFromGlobal));
}
