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Merge pull request #5581 from edolstra/parse-calls

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Parse '(f x) y' the same as 'f x y'
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Eelco Dolstra 2021-11-18 11:34:04 +01:00 committed by GitHub
commit 9e845df339
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1 changed files with 7 additions and 17 deletions
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24
src/libexpr/parser.y
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@ -39,12 +39,6 @@ namespace nix {
{ };
};
// Helper to prevent an expensive dynamic_cast call in expr_app.
struct App
{
Expr * e;
bool isCall;
};
}
#define YY_DECL int yylex \
@ -284,12 +278,10 @@ void yyerror(YYLTYPE * loc, yyscan_t scanner, ParseData * data, const char * err
char * uri;
std::vector<nix::AttrName> * attrNames;
std::vector<nix::Expr *> * string_parts;
nix::App app; // bool == whether this is an ExprCall
}
%type <e> start expr expr_function expr_if expr_op
%type <e> expr_select expr_simple
%type <app> expr_app
%type <e> expr_select expr_simple expr_app
%type <list> expr_list
%type <attrs> binds
%type <formals> formals
@ -377,20 +369,18 @@ expr_op
| expr_op '*' expr_op { $$ = new ExprCall(CUR_POS, new ExprVar(data->symbols.create("__mul")), {$1, $3}); }
| expr_op '/' expr_op { $$ = new ExprCall(CUR_POS, new ExprVar(data->symbols.create("__div")), {$1, $3}); }
| expr_op CONCAT expr_op { $$ = new ExprOpConcatLists(CUR_POS, $1, $3); }
| expr_app { $$ = $1.e; }
| expr_app
;
expr_app
: expr_app expr_select {
if ($1.isCall) {
((ExprCall *) $1.e)->args.push_back($2);
if (auto e2 = dynamic_cast<ExprCall *>($1)) {
e2->args.push_back($2);
$$ = $1;
} else {
$$.e = new ExprCall(CUR_POS, $1.e, {$2});
$$.isCall = true;
} else
$$ = new ExprCall(CUR_POS, $1, {$2});
}
}
| expr_select { $$.e = $1; $$.isCall = false; }
| expr_select
;
expr_select