///
public static NeuNode?GetBinding(
this NeuPatternBinding patternBinding)
{
var patternReached = false;
///
foreach (var c in patternBinding.Children)
{
switch (c)
{
case NeuPattern _ when !patternReached: // only toggle on a single pattern
patternReached = true;
break;
///
case NeuTypeAnnotation _:
break;
///
case NeuNode n when patternReached:
return(n);
///
default:
break;
}
}
///
return(null);
}
///
public static NeuOperation Execute(
this NeuInterpreter interpreter,
bool inGlobalScope,
NeuKeyword kindKeyword,
NeuPatternBinding patternBinding)
{
var pattern = patternBinding.GetPattern();
if (pattern == null)
{
throw new Exception();
}
///
var binding = patternBinding.GetBinding();
if (binding == null)
{
throw new Exception();
}
///
switch (true)
{
case var _
when
pattern is NeuIdentifierPattern idPattern &&
binding is NeuInitClause initClause:
return(interpreter.Execute(inGlobalScope, kindKeyword, idPattern, initClause));
///
default:
throw new Exception();
}
}
public static bool EndsWithNewline(
this NeuPatternBinding patternBinding)
{
var s = patternBinding.Children.FirstOrDefault()?.Start;
if (s == null)
{
throw new Exception();
}
///
var e = patternBinding.Children.LastOrDefault()?.End;
if (e == null)
{
throw new Exception();
}
///
return(e.LineNumber > s.LineNumber);
}
///
public static NeuPattern?GetPattern(
this NeuPatternBinding patternBinding)
{
return(patternBinding.GetFirstOrDefault <NeuPattern>());
}
