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Diffstat (limited to 'third_party/nix/src/libexpr/parser.y')
| -rw-r--r-- | third_party/nix/src/libexpr/parser.y | 359 |
1 files changed, 0 insertions, 359 deletions
diff --git a/third_party/nix/src/libexpr/parser.y b/third_party/nix/src/libexpr/parser.y deleted file mode 100644 index a8af06802f16..000000000000 --- a/third_party/nix/src/libexpr/parser.y +++ /dev/null @@ -1,359 +0,0 @@ -%glr-parser -%locations -%define parse.error verbose -%define api.pure true -%defines -/* %no-lines */ -%parse-param { void * scanner } -%parse-param { nix::ParseData * data } -%lex-param { void * scanner } -%lex-param { nix::ParseData * data } -%expect 1 -%expect-rr 1 - -%code requires { -#define YY_NO_INPUT 1 // disable unused yyinput features -#include "libexpr/parser.hh" - -struct YYSTYPE { - union { - nix::Expr * e; - nix::ExprList * list; - nix::ExprAttrs * attrs; - nix::Formals * formals; - nix::Formal * formal; - nix::NixInt n; - nix::NixFloat nf; - const char * id; // !!! -> Symbol - char * path; - char * uri; - nix::AttrNameVector * attrNames; - nix::VectorExprs * string_parts; - }; -}; - -} - -%{ - -#include "generated/parser-tab.hh" -#include "generated/lexer-tab.hh" - -YY_DECL; - -using namespace nix; - -namespace nix { - -static inline Pos makeCurPos(const YYLTYPE& loc, ParseData* data) { - return Pos(data->path, loc.first_line, loc.first_column); -} - -void yyerror(YYLTYPE* loc, yyscan_t scanner, ParseData* data, - const char* error) { - data->error = (format("%1%, at %2%") % error % makeCurPos(*loc, data)).str(); -} - -} - -%} - -%type <e> start expr expr_function expr_if expr_op -%type <e> expr_app expr_select expr_simple -%type <list> expr_list -%type <attrs> binds -%type <formals> formals -%type <formal> formal -%type <attrNames> attrs attrpath -%type <string_parts> string_parts_interpolated ind_string_parts -%type <e> string_parts string_attr -%type <id> attr -%token <id> ID ATTRPATH -%token <e> STR IND_STR -%token <n> INT -%token <nf> FLOAT -%token <path> PATH HPATH SPATH -%token <uri> URI -%token IF THEN ELSE ASSERT WITH LET IN REC INHERIT EQ NEQ AND OR IMPL OR_KW -%token DOLLAR_CURLY /* == ${ */ -%token IND_STRING_OPEN IND_STRING_CLOSE -%token ELLIPSIS - -%right IMPL -%left OR -%left AND -%nonassoc EQ NEQ -%nonassoc '<' '>' LEQ GEQ -%right UPDATE -%left NOT -%left '+' '-' -%left '*' '/' -%right CONCAT -%nonassoc '?' -%nonassoc NEGATE - -%% - -start: expr { data->result = $1; }; - -expr: expr_function; - -expr_function - : ID ':' expr_function - { $$ = new ExprLambda(CUR_POS, data->symbols.Create($1), false, 0, $3); } - | '{' formals '}' ':' expr_function - { $$ = new ExprLambda(CUR_POS, data->symbols.Create(""), true, $2, $5); } - | '{' formals '}' '@' ID ':' expr_function - { $$ = new ExprLambda(CUR_POS, data->symbols.Create($5), true, $2, $7); } - | ID '@' '{' formals '}' ':' expr_function - { $$ = new ExprLambda(CUR_POS, data->symbols.Create($1), true, $4, $7); } - | ASSERT expr ';' expr_function - { $$ = new ExprAssert(CUR_POS, $2, $4); } - | WITH expr ';' expr_function - { $$ = new ExprWith(CUR_POS, $2, $4); } - | LET binds IN expr_function - { if (!$2->dynamicAttrs.empty()) - throw ParseError(format("dynamic attributes not allowed in let at %1%") - % CUR_POS); - $$ = new ExprLet($2, $4); - } - | expr_if - ; - -expr_if - : IF expr THEN expr ELSE expr { $$ = new ExprIf(CUR_POS, $2, $4, $6); } - | expr_op - ; - -expr_op - : '!' expr_op %prec NOT { $$ = new ExprOpNot(CUR_POS, $2); } - | '-' expr_op %prec NEGATE { $$ = new ExprApp(CUR_POS, new ExprApp(new ExprVar(data->symbols.Create("__sub")), new ExprInt(0)), $2); } - | expr_op EQ expr_op { $$ = new ExprOpEq(CUR_POS, $1, $3); } - | expr_op NEQ expr_op { $$ = new ExprOpNEq(CUR_POS, $1, $3); } - | expr_op '<' expr_op { $$ = new ExprApp(CUR_POS, new ExprApp(new ExprVar(data->symbols.Create("__lessThan")), $1), $3); } - | expr_op LEQ expr_op { $$ = new ExprOpNot(new ExprApp(CUR_POS, new ExprApp(new ExprVar(data->symbols.Create("__lessThan")), $3), $1)); } - | expr_op '>' expr_op { $$ = new ExprApp(CUR_POS, new ExprApp(new ExprVar(data->symbols.Create("__lessThan")), $3), $1); } - | expr_op GEQ expr_op { $$ = new ExprOpNot(new ExprApp(CUR_POS, new ExprApp(new ExprVar(data->symbols.Create("__lessThan")), $1), $3)); } - | expr_op AND expr_op { $$ = new ExprOpAnd(CUR_POS, $1, $3); } - | expr_op OR expr_op { $$ = new ExprOpOr(CUR_POS, $1, $3); } - | expr_op IMPL expr_op { $$ = new ExprOpImpl(CUR_POS, $1, $3); } - | expr_op UPDATE expr_op { $$ = new ExprOpUpdate(CUR_POS, $1, $3); } - | expr_op '?' attrpath { $$ = new ExprOpHasAttr(CUR_POS, $1, *$3); } - | expr_op '+' expr_op - { $$ = new ExprConcatStrings(CUR_POS, false, new nix::VectorExprs({$1, $3})); } - | expr_op '-' expr_op { $$ = new ExprApp(CUR_POS, new ExprApp(new ExprVar(data->symbols.Create("__sub")), $1), $3); } - | expr_op '*' expr_op { $$ = new ExprApp(CUR_POS, new ExprApp(new ExprVar(data->symbols.Create("__mul")), $1), $3); } - | expr_op '/' expr_op { $$ = new ExprApp(CUR_POS, new ExprApp(new ExprVar(data->symbols.Create("__div")), $1), $3); } - | expr_op CONCAT expr_op { $$ = new ExprOpConcatLists(CUR_POS, $1, $3); } - | expr_app - ; - -expr_app - : expr_app expr_select - { $$ = new ExprApp(CUR_POS, $1, $2); } - | expr_select { $$ = $1; } - ; - -expr_select - : expr_simple '.' attrpath - { $$ = new ExprSelect(CUR_POS, $1, *$3, 0); } - | expr_simple '.' attrpath OR_KW expr_select - { $$ = new ExprSelect(CUR_POS, $1, *$3, $5); } - | /* Backwards compatibility: because Nixpkgs has a rarely used - function named ‘or’, allow stuff like ‘map or [...]’. */ - expr_simple OR_KW - { $$ = new ExprApp(CUR_POS, $1, new ExprVar(CUR_POS, data->symbols.Create("or"))); } - | expr_simple { $$ = $1; } - ; - -expr_simple - : ID { - if (strcmp($1, "__curPos") == 0) - $$ = new ExprPos(CUR_POS); - else - $$ = new ExprVar(CUR_POS, data->symbols.Create($1)); - } - | INT { $$ = new ExprInt($1); } - | FLOAT { $$ = new ExprFloat($1); } - | '"' string_parts '"' { $$ = $2; } - | IND_STRING_OPEN ind_string_parts IND_STRING_CLOSE { - $$ = stripIndentation(CUR_POS, data->symbols, *$2); - } - | PATH { $$ = new ExprPath(absPath($1, data->basePath)); } - | HPATH { $$ = new ExprPath(getHome() + std::string{$1 + 1}); } - | SPATH { - std::string path($1 + 1, strlen($1) - 2); - $$ = new ExprApp(CUR_POS, - new ExprApp(new ExprVar(data->symbols.Create("__findFile")), - new ExprVar(data->symbols.Create("__nixPath"))), - new ExprString(data->symbols.Create(path))); - } - | URI { $$ = new ExprString(data->symbols.Create($1)); } - | '(' expr ')' { $$ = $2; } - /* Let expressions `let {..., body = ...}' are just desugared - into `(rec {..., body = ...}).body'. */ - | LET '{' binds '}' - { $3->recursive = true; $$ = new ExprSelect(noPos, $3, data->symbols.Create("body")); } - | REC '{' binds '}' - { $3->recursive = true; $$ = $3; } - | '{' binds '}' - { $$ = $2; } - | '[' expr_list ']' { $$ = $2; } - ; - -string_parts - : STR - | string_parts_interpolated { $$ = new ExprConcatStrings(CUR_POS, true, $1); } - | { $$ = new ExprString(data->symbols.Create("")); } - ; - -string_parts_interpolated - : string_parts_interpolated STR { $$ = $1; $1->push_back($2); } - | string_parts_interpolated DOLLAR_CURLY expr '}' { $$ = $1; $1->push_back($3); } - | DOLLAR_CURLY expr '}' { $$ = new nix::VectorExprs; $$->push_back($2); } - | STR DOLLAR_CURLY expr '}' { - $$ = new nix::VectorExprs; - $$->push_back($1); - $$->push_back($3); - } - ; - -ind_string_parts - : ind_string_parts IND_STR { $$ = $1; $1->push_back($2); } - | ind_string_parts DOLLAR_CURLY expr '}' { $$ = $1; $1->push_back($3); } - | { $$ = new nix::VectorExprs; } - ; - -binds - : binds attrpath '=' expr ';' { $$ = $1; addAttr($$, *$2, $4, makeCurPos(@2, data)); } - | binds INHERIT attrs ';' - { $$ = $1; - for (auto & i : *$3) { - auto sym = std::get<Symbol>(i); - if ($$->attrs.find(sym) != $$->attrs.end()) { - dupAttr(sym, makeCurPos(@3, data), $$->attrs[sym].pos); - } - Pos pos = makeCurPos(@3, data); - $$->attrs[sym] = ExprAttrs::AttrDef(new ExprVar(CUR_POS, sym), pos, true); - } - } - | binds INHERIT '(' expr ')' attrs ';' - { $$ = $1; - /* !!! Should ensure sharing of the expression in $4. */ - for (auto & i : *$6) { - auto sym = std::get<Symbol>(i); - if ($$->attrs.find(sym) != $$->attrs.end()) { - dupAttr(sym, makeCurPos(@6, data), $$->attrs[sym].pos); - } - $$->attrs[sym] = ExprAttrs::AttrDef(new ExprSelect(CUR_POS, $4, sym), makeCurPos(@6, data)); - } - } - | { $$ = new ExprAttrs; } - ; - -attrs - : attrs attr { $$ = $1; $1->push_back(AttrName(data->symbols.Create($2))); } - | attrs string_attr - { $$ = $1; - ExprString * str = dynamic_cast<ExprString *>($2); - if (str) { - $$->push_back(AttrName(str->s)); - delete str; - } else - throw ParseError(format("dynamic attributes not allowed in inherit at %1%") - % makeCurPos(@2, data)); - } - | { $$ = new AttrPath; } - ; - -attrpath - : attrpath '.' attr { $$ = $1; $1->push_back(AttrName(data->symbols.Create($3))); } - | attrpath '.' string_attr - { $$ = $1; - ExprString * str = dynamic_cast<ExprString *>($3); - if (str) { - $$->push_back(AttrName(str->s)); - delete str; - } else { - $$->push_back(AttrName($3)); - } - } - | attr { $$ = new nix::AttrNameVector; $$->push_back(AttrName(data->symbols.Create($1))); } - | string_attr - { $$ = new nix::AttrNameVector; - ExprString *str = dynamic_cast<ExprString *>($1); - if (str) { - $$->push_back(AttrName(str->s)); - delete str; - } else - $$->push_back(AttrName($1)); - } - ; - -attr - : ID { $$ = $1; } - | OR_KW { $$ = "or"; } - ; - -string_attr - : '"' string_parts '"' { $$ = $2; } - | DOLLAR_CURLY expr '}' { $$ = $2; } - ; - -expr_list - : expr_list expr_select { $$ = $1; $1->elems.push_back($2); /* !!! dangerous */ } - | { $$ = new ExprList; } - ; - -formals - : formal ',' formals - { $$ = $3; addFormal(CUR_POS, $$, *$1); } - | formal - { $$ = new Formals; addFormal(CUR_POS, $$, *$1); $$->ellipsis = false; } - | - { $$ = new Formals; $$->ellipsis = false; } - | ELLIPSIS - { $$ = new Formals; $$->ellipsis = true; } - ; - -formal - : ID { $$ = new Formal(data->symbols.Create($1), 0); } - | ID '?' expr { $$ = new Formal(data->symbols.Create($1), $3); } - ; - -%% - - -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <unistd.h> - -#include "libexpr/eval.hh" -#include "libstore/store-api.hh" - - -namespace nix { - -Expr* EvalState::parse(const char* text, const Path& path, const Path& basePath, - StaticEnv& staticEnv) { - yyscan_t scanner; - ParseData data(*this); - data.basePath = basePath; - data.path = data.symbols.Create(path); - - yylex_init(&scanner); - yy_scan_string(text, scanner); - int res = yyparse(scanner, &data); - yylex_destroy(scanner); - - if (res) { - throw ParseError(data.error); - } - - data.result->bindVars(staticEnv); - - return data.result; -} - -} // namespace nix |