shithub: mc

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Refactor the grammar.

--- a/parse/gram.y

+++ b/parse/gram.y

@@ -1,5 +1,6 @@

 %{

 #define YYERROR_VERBOSE

+#define YYDEBUG 1

 #include <stdlib.h>

 #include <stdio.h>

@@ -117,7 +118,7 @@

 %token<tok> Tident

 %token<tok> Teof

-%start module

+%start file

 %type <ty> type structdef uniondef tupledef compoundtype functype funcsig

 %type <ty> generictype

@@ -130,12 +131,13 @@

 %type <node> exprln retexpr expr atomicexpr littok literal asnexpr lorexpr landexpr borexpr

 %type <node> bandexpr cmpexpr unionexpr addexpr mulexpr shiftexpr prefixexpr postfixexpr

-%type <node> funclit seqlit name block blockbody stmt label use

+%type <node> funclit seqlit name block stmt label use

 %type <node> decl declbody declcore structelt seqelt tuphead

 %type <node> ifstmt forstmt whilestmt matchstmt elifs optexprln

 %type <node> pat unionpat match

 %type <node> castexpr

 %type <ucon> unionelt

+%type <node> body 

 %type <nodelist> arglist argdefs params matches

 %type <nodelist> structbody seqbody tupbody tuprest

@@ -170,12 +172,8 @@

 %%

-module  : file

-        | /* empty */

-        ;

-

 file    : toplev

-        | file toplev

+        | file Tendln toplev

         ;

 toplev

@@ -189,28 +187,28 @@

         | tydef

             {puttype(file->file.globls, mkname($1.line, $1.name), $1.type);

              installucons(file->file.globls, $1.type);}

-        | Tendln

+        | /* empty */

         ;

-decl    : Tvar declbody Tendln

+decl    : Tvar declbody

             {$$ = $2;}

-        | Tconst declbody Tendln

+        | Tconst declbody

             {$2->decl.isconst = 1;

              $$ = $2;}

-        | Tgeneric declbody Tendln

+        | Tgeneric declbody

             {$2->decl.isconst = 1;

              $2->decl.isgeneric = 1;

              $$ = $2;}

-        | Textern Tvar declbody Tendln

+        | Textern Tvar declbody

             {$3->decl.isextern = 1;

              $$ = $3;}

-        | Textern Tconst declbody Tendln

+        | Textern Tconst declbody

             {$3->decl.isconst = 1;

              $3->decl.isextern = 1;

              $$ = $3;}

         ;

-use     : Tuse Tident Tendln

+use     : Tuse Tident

             {$$ = mkuse($1->line, $2->str, 0);}

         | Tuse Tstrlit Tendln

             {$$ = mkuse($1->line, $2->str, 1);}

@@ -228,7 +226,7 @@

         | pkgbody pkgitem

         ;

-pkgitem : decl 

+pkgitem : decl Tendln 

             {putdcl(file->file.exports, $1);

              if ($1->decl.init)

                  lappend(&file->file.stmts, &file->file.nstmts, $1);}

@@ -258,11 +256,11 @@

             {$$ = $3; setns($3, $1->str);}

         ;

-tydef   : Ttype Tident Tasn type Tendln

+tydef   : Ttype Tident Tasn type

             {$$.line = $1->line;

              $$.name = $2->str;

              $$.type = mktyalias($2->line, mkname($2->line, $2->str), $4);}

-        | Ttype Tident Tendln

+        | Ttype Tident

             {$$.line = $1->line;

              $$.name = $2->str;

              $$.type = NULL;}

@@ -376,10 +374,10 @@

             {$$ = NULL;}

         ;

-retexpr : Tret exprln

+retexpr : Tret expr

             {$$ = mkexpr($1->line, Oret, $2, NULL);}

-        | exprln

-        | Tret Tendln

+        | expr

+        | Tret

             {$$ = mkexpr($1->line, Oret, NULL);}

         ;

@@ -551,9 +549,9 @@

         | Tboollit      {$$ = mkbool($1->line, !strcmp($1->str, "true"));}

         ;

-funclit : Tobrace params Tendln blockbody Tcbrace

+funclit : Tobrace params Tendln body Tcbrace

             {$$ = mkfunc($1->line, $2.nl, $2.nn, mktyvar($3->line), $4);}

-        | Tobrace params Tret type Tendln blockbody Tcbrace

+        | Tobrace params Tret type Tendln block Tcbrace

             {$$ = mkfunc($1->line, $2.nl, $2.nn, $4, $6);}

         ;

@@ -595,12 +593,13 @@

         | forstmt

         | whilestmt

         | matchstmt

+        | /* empty */ {$$ = NULL;}

         ;

 forstmt : Tfor optexprln optexprln optexprln block

             {$$ = mkloopstmt($1->line, $2, $3, $4, $5);}

-        | Tfor decl optexprln optexprln block

-            {$$ = mkloopstmt($1->line, $2, $3, $4, $5);}

+        | Tfor decl Tendln optexprln optexprln block

+            {$$ = mkloopstmt($1->line, $2, $4, $5, $6);}

         ;

 optexprln: exprln {$$ = $1;}

@@ -612,13 +611,13 @@

             {$$ = mkloopstmt($1->line, NULL, $2, NULL, $3);}

         ;

-ifstmt  : Tif exprln blockbody elifs

+ifstmt  : Tif exprln body elifs

             {$$ = mkifstmt($1->line, $2, $3, $4);}

         ;

-elifs   : Telif exprln blockbody elifs

+elifs   : Telif exprln body elifs

             {$$ = mkifstmt($1->line, $2, $3, $4);}

-        | Telse blockbody Tendblk

+        | Telse block

             {$$ = $2;}

         | Tendblk

             {$$ = NULL;}

@@ -653,21 +652,21 @@

             {$$ = mkexpr($1->line, Ocons, mkname($2->line, $2->str), NULL);}

         ;

-block   : blockbody Tendblk

-        | Tendblk {$$ = NULL;}

+block   : body Tendblk

         ;

-blockbody

-        : /* empty */

-            {$$ = mkblock(line, mkstab());}

-        | blockbody stmt

-            {if ($2)

-                lappend(&$1->block.stmts, &$1->block.nstmts, $2);

-             if ($2 && $2->type == Ndecl)

-                putdcl($1->block.scope, $2);

+body    : stmt

+            {$$ = mkblock(line, mkstab());

+             if ($1)

+                lappend(&$$->block.stmts, &$$->block.nstmts, $1);

+             if ($1 && $1->type == Ndecl)

+                putdcl($$->block.scope, $1);}

+        | body Tendln stmt

+            {if ($3)

+                lappend(&$1->block.stmts, &$1->block.nstmts, $3);

+             if ($3 && $3->type == Ndecl)

+                putdcl($1->block.scope, $3);

              $$ = $1;}

-        | blockbody Tendln 

-            {$$ = $1;}

         ;

 label   : Tcolon Tident

--- a/test/main.myr

+++ b/test/main.myr

@@ -1,3 +1,1 @@

-const main = {

-	-> 0

-}

+const main = {; -> 0 }

-- 

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