public static PHP.Core.AST.DirectFcnCall.EvaluateInfo CreateFunction_Analyze(
Analyzer analyzer,
PHP.Core.AST.CallSignature callSignature,
string args, string body)
{
if (analyzer.IsInsideIncompleteClass())
{
return(null); // in this case, the DirectFnCall will not be Emitted. Therefore the lambda routine will not be declared and compilation will fail when emitting not fully declared lambda FunctionDecl.
}
// has to be a valid identifier:
// actually this name is never used then
string function_name = "__" + Guid.NewGuid().ToString().Replace('-', '_'); //DynamicCode.GenerateLambdaName(args, body);
string prefix1, prefix2;
DynamicCode.GetLamdaFunctionCodePrefixes(function_name, args, out prefix1, out prefix2);
PHP.Core.Parsers.Position pos_args = callSignature.Parameters[0].Position;
PHP.Core.Parsers.Position pos_body = callSignature.Parameters[1].Position;
// function __XXXXXX(<args>){<fill><body>}
string fill = GetInlinedLambdaCodeFill(pos_args, pos_body);
string code = String.Concat(prefix2, fill, body, "}");
// the position of the first character of the parsed code:
// (note that escaped characters distort position a little bit, which cannot be eliminated so easily)
PHP.Core.Parsers.Position pos = PHP.Core.Parsers.Position.Initial;
pos.FirstOffset = pos_args.FirstOffset - prefix1.Length + 1;
pos.FirstColumn = pos_args.FirstColumn - prefix1.Length + 1;
pos.FirstLine = pos_args.FirstLine;
// parses function source code:
var counter = new PHP.Core.Parsers.Parser.ReductionsCounter();
var ast = analyzer.BuildAst(pos, code, counter);
if (ast == null || ast.Statements == null)
{
return(null); // the function cannot be parsed
}
Debug.Assert(counter.FunctionCount == 1);
var decl_node = (PHP.Core.AST.FunctionDecl)ast.Statements[0];
// adds declaration to the end of the global code statement list:
analyzer.AddLambdaFcnDeclaration(decl_node);
//
return(new PHP.Core.AST.DirectFcnCall.EvaluateInfo()
{
//.inlined = InlinedFunction.CreateFunction;
emitDeclareLamdaFunction = true,
// modify declaration:
newRoutine = decl_node.ConvertToLambda(analyzer),
});
}