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parser.y: eliminate conflicts

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This commit is contained in:
Ryan Hendrickson 2024-07-20 12:04:25 -04:00
parent b0a8430e85
commit 6e3b9e6a4d
2 changed files with 39 additions and 24 deletions
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61
src/libexpr/parser.y
View file

@ -8,8 +8,8 @@
%parse-param { nix::ParserState * state }
%lex-param { void * scanner }
%lex-param { nix::ParserState * state }
%expect 1
%expect-rr 1
%expect 0
%expect-rr 0
%code requires {
@ -133,8 +133,8 @@ static Expr * makeCall(PosIdx pos, Expr * fn, Expr * arg) {
%type <e> expr_select expr_simple expr_app
%type <e> expr_pipe_from expr_pipe_into
%type <list> expr_list
%type <attrs> binds
%type <formals> formals
%type <attrs> binds binds1
%type <formals> formals formal_set
%type <formal> formal
%type <attrNames> attrpath
%type <inheritAttrs> attrs
@ -180,22 +180,22 @@ expr_function
$$ = me;
SET_DOC_POS(me, @1);
}
| '{' formals '}' ':' expr_function[body]
{ auto me = new ExprLambda(CUR_POS, state->validateFormals($formals), $body);
| formal_set ':' expr_function[body]
{ auto me = new ExprLambda(CUR_POS, state->validateFormals($formal_set), $body);
$$ = me;
SET_DOC_POS(me, @1);
}
| '{' formals '}' '@' ID ':' expr_function[body]
| formal_set '@' ID ':' expr_function[body]
{
auto arg = state->symbols.create($ID);
auto me = new ExprLambda(CUR_POS, arg, state->validateFormals($formals, CUR_POS, arg), $body);
auto me = new ExprLambda(CUR_POS, arg, state->validateFormals($formal_set, CUR_POS, arg), $body);
$$ = me;
SET_DOC_POS(me, @1);
}
| ID '@' '{' formals '}' ':' expr_function[body]
| ID '@' formal_set ':' expr_function[body]
{
auto arg = state->symbols.create($ID);
auto me = new ExprLambda(CUR_POS, arg, state->validateFormals($formals, CUR_POS, arg), $body);
auto me = new ExprLambda(CUR_POS, arg, state->validateFormals($formal_set, CUR_POS, arg), $body);
$$ = me;
SET_DOC_POS(me, @1);
}
@ -311,11 +311,13 @@ expr_simple
/* Let expressions `let {..., body = ...}' are just desugared
into `(rec {..., body = ...}).body'. */
| LET '{' binds '}'
{ $3->recursive = true; $$ = new ExprSelect(noPos, $3, state->s.body); }
{ $3->recursive = true; $3->pos = CUR_POS; $$ = new ExprSelect(noPos, $3, state->s.body); }
| REC '{' binds '}'
{ $3->recursive = true; $$ = $3; }
| '{' binds '}'
{ $$ = $2; }
{ $3->recursive = true; $3->pos = CUR_POS; $$ = $3; }
| '{' binds1 '}'
{ $2->pos = CUR_POS; $$ = $2; }
| '{' '}'
{ $$ = new ExprAttrs(CUR_POS); }
| '[' expr_list ']' { $$ = $2; }
;
@ -364,8 +366,13 @@ ind_string_parts
;
binds
: binds[accum] attrpath '=' expr ';' {
$$ = $accum;
: binds1
| { $$ = new ExprAttrs; }
;
binds1
: binds1[accum] attrpath '=' expr ';'
{ $$ = $accum;
state->addAttr($$, std::move(*$attrpath), @attrpath, $expr, @expr);
delete $attrpath;
}
@ -398,7 +405,11 @@ binds
}
delete $attrs;
}
| { $$ = new ExprAttrs(state->at(@0)); }
| attrpath '=' expr ';'
{ $$ = new ExprAttrs;
state->addAttr($$, std::move(*$attrpath), @attrpath, $expr, @expr);
delete $attrpath;
}
;
attrs
@ -456,15 +467,19 @@ expr_list
| { $$ = new ExprList; }
;
formal_set
: '{' formals ',' ELLIPSIS '}' { $$ = $formals; $$->ellipsis = true; }
| '{' ELLIPSIS '}' { $$ = new Formals; $$->ellipsis = true; }
| '{' formals ',' '}' { $$ = $formals; $$->ellipsis = false; }
| '{' formals '}' { $$ = $formals; $$->ellipsis = false; }
| '{' '}' { $$ = new Formals; $$->ellipsis = false; }
;
formals
: formal ',' formals[accum]
: formals[accum] ',' formal
{ $$ = $accum; $$->formals.emplace_back(*$formal); delete $formal; }
| formal
{ $$ = new Formals; $$->formals.emplace_back(*$formal); $$->ellipsis = false; delete $formal; }
|
{ $$ = new Formals; $$->ellipsis = false; }
| ELLIPSIS
{ $$ = new Formals; $$->ellipsis = true; }
{ $$ = new Formals; $$->formals.emplace_back(*$formal); delete $formal; }
;
formal

2
tests/functional/lang/parse-fail-undef-var-2.err.exp
View file

@ -1,4 +1,4 @@
error: syntax error, unexpected ':', expecting '}'
error: syntax error, unexpected ':', expecting '}' or ','
at «stdin»:3:13:
2|
3| f = {x, y : ["baz" "bar" z "bat"]}: x + y;