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Throw a specific error for incomplete parse errors.

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`nix-repl` will use this for deciding whether to keep waiting for input or
error out right away.
This commit is contained in:
Scott Olson 2016-02-24 04:32:18 -06:00
parent 8f71bc33d5
commit 6498adb002
3 changed files with 11 additions and 1 deletions
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9
src/libexpr/parser.y
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@ -31,10 +31,12 @@ namespace nix {
Path basePath;
Symbol path;
string error;
bool atEnd;
Symbol sLetBody;
ParseData(EvalState & state)
: state(state)
, symbols(state.symbols)
, atEnd(false)
, sLetBody(symbols.create("<let-body>"))
{ };
};
@ -539,7 +541,12 @@ Expr * EvalState::parse(const char * text,
int res = yyparse(scanner, &data);
yylex_destroy(scanner);
if (res) throw ParseError(data.error);
if (res) {
if (data.atEnd)
throw IncompleteParseError(data.error);
else
throw ParseError(data.error);
}
data.result->bindVars(staticEnv);