resolveStructLiteralNamedArgs

sd StructDeclaration: struct
t Type: type of struct (potentially including qualifiers such as const or immutable)
sc Scope*: scope of the expression initializing the struct
iloc Loc: location of expression initializing the struct
names Identifier[]: identifiers passed in argument list, null entries for positional arguments
getExp Expression delegate ( size_t i , Type fieldType ): function that, given an index into names and destination type, returns the initializing expression
getLoc Loc delegate ( size_t i ): function that, given an index into names, returns a location for error messages

Return Value

list of expressions ordered to the struct's fields, or null on error