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[OCaml] Improve the error message for incorrect overloaded function calls

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List the possible prototypes in the error message. The code was taken
from python.cxx's dispatchFunction().
This commit is contained in:
Zackery Spytz 2019-01-16 23:08:12 -07:00
commit b3f903722b
1 changed files with 12 additions and 1 deletions
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13
Source/Modules/ocaml.cxx
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@ -733,7 +733,18 @@ public:
"argv = (CAML_VALUE *)malloc( argc * sizeof( CAML_VALUE ) );\n" "argv = (CAML_VALUE *)malloc( argc * sizeof( CAML_VALUE ) );\n"
"for( i = 0; i < argc; i++ ) {\n" " argv[i] = caml_list_nth(args,i);\n" "}\n", NIL); "for( i = 0; i < argc; i++ ) {\n" " argv[i] = caml_list_nth(args,i);\n" "}\n", NIL);
Printv(df->code, dispatch, "\n", NIL); Printv(df->code, dispatch, "\n", NIL);
Printf(df->code, "caml_failwith(\"No matching function for overloaded '%s'\");\n", iname); Node *sibl = n;
while (Getattr(sibl, "sym:previousSibling"))
sibl = Getattr(sibl, "sym:previousSibling");
String *protoTypes = NewString("");
do {
String *fulldecl = Swig_name_decl(sibl);
Printf(protoTypes, "\n\" %s\\n\"", fulldecl);
Delete(fulldecl);
} while ((sibl = Getattr(sibl, "sym:nextSibling")));
Printf(df->code, "caml_failwith(\"Wrong number or type of arguments for overloaded function '%s'.\\n\""
"\n\" Possible C/C++ prototypes are:\\n\"%s);\n", iname, protoTypes);
Delete(protoTypes);
Printv(df->code, "}\n", NIL); Printv(df->code, "}\n", NIL);
Wrapper_print(df, f_wrappers); Wrapper_print(df, f_wrappers);