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|
%{
open Tables
let lowercase s =
let r = String.create (String.length s) in
String.blit s 0 r 0 (String.length s);
let c = s.[0] in
if c >= 'A' & c <= 'Z' then r.[0] <- Char.chr(Char.code c + 32);
r
%}
/* Tokens */
%token <string> IDENT
%token <string> STRING
%token EOF
%token LPAREN /* "(" */
%token RPAREN /* ")" */
%token COMMA /* "," */
%token SEMICOLON /* ";" */
%token LBRACKET /* "[" */
%token RBRACKET /* "]" */
%token LBRACE /* "{" */
%token RBRACE /* "}" */
%token TYINT /* "int" */
%token TYFLOAT /* "float" */
%token TYBOOL /* "bool" */
%token TYCHAR /* "char" */
%token TYSTRING /* "string" */
%token LIST /* "list" */
%token WIDGET /* "widget" */
%token OPTION /* "option" */
%token TYPE /* "type" */
%token SEQUENCE /* "sequence" */
%token SUBTYPE /* "subtype" */
%token FUNCTION /* "function" */
%token MODULE /* "module" */
%token EXTERNAL /* "external" */
%token UNSAFE /* "unsafe" */
/* Entry points */
%start entry
%type <unit> entry
%%
TypeName:
IDENT { lowercase $1 }
| WIDGET { "widget" }
;
/* Atomic types */
Type0 :
TYINT
{ Int }
| TYFLOAT
{ Float }
| TYBOOL
{ Bool }
| TYCHAR
{ Char }
| TYSTRING
{ String }
| TypeName
{ UserDefined $1 }
;
/* with subtypes */
Type1 :
Type0
{ $1 }
| TypeName LPAREN IDENT RPAREN
{ Subtype ($1, $3) }
| WIDGET LPAREN IDENT RPAREN
{ Subtype ("widget", $3) }
| OPTION LPAREN IDENT RPAREN
{ Subtype ("options", $3) }
;
/* with list constructors */
Type2 :
Type1
{ $1 }
| Type1 LIST
{ List $1 }
;
/* products */
Type_list :
Type2 COMMA Type_list
{ $1 :: $3 }
| Type2
{ [$1] }
;
/* callback arguments or function results*/
FType :
LPAREN RPAREN
{ Unit }
| LPAREN Type2 RPAREN
{ $2 }
| LPAREN Type_list RPAREN
{ Product $2 }
;
Type :
Type2
{ $1 }
| FUNCTION FType
{ Function $2 }
;
Arg:
STRING
{StringArg $1}
| Type
{TypeArg $1 }
| Template
{ $1 }
;
ArgList:
Arg SEMICOLON ArgList
{ $1 :: $3}
| Arg
{ [$1] }
;
/* Template */
Template :
LBRACKET ArgList RBRACKET
{ ListArg $2 }
;
/* Constructors for type declarations */
Constructor :
IDENT Template
{{ component = Constructor;
ml_name = $1;
template = $2;
result = Unit;
safe = true }}
;
AbbrevConstructor :
Constructor
{ Full $1 }
| IDENT
{ Abbrev $1 }
;
Constructors :
Constructor Constructors
{ $1 :: $2 }
| Constructor
{ [$1] }
;
AbbrevConstructors :
AbbrevConstructor AbbrevConstructors
{ $1 :: $2 }
| AbbrevConstructor
{ [$1] }
;
Safe:
/* */
{ true }
| UNSAFE
{ false }
Command :
Safe FUNCTION FType IDENT Template
{{component = Command; ml_name = $4;
template = $5; result = $3; safe = $1 }}
;
External :
Safe EXTERNAL IDENT STRING
{{component = External; ml_name = $3;
template = StringArg $4; result = Unit; safe = $1}}
;
Option :
OPTION IDENT Template
{{component = Constructor; ml_name = $2;
template = $3; result = Unit; safe = true }}
/* Abbreviated */
| OPTION IDENT
{ retrieve_option $2 }
;
WidgetComponents :
/* */
{ [] }
| Command WidgetComponents
{ $1 :: $2 }
| Option WidgetComponents
{ $1 :: $2 }
| External WidgetComponents
{ $1 :: $2 }
;
ModuleComponents :
/* */
{ [] }
| Command ModuleComponents
{ $1 :: $2 }
| External ModuleComponents
{ $1 :: $2 }
;
ParserArity :
/* */
{ OneToken }
| SEQUENCE
{ MultipleToken }
;
entry :
TYPE ParserArity TypeName LBRACE Constructors RBRACE
{ enter_type $3 $2 $5 }
| TYPE ParserArity TypeName EXTERNAL
{ enter_external_type $3 $2 }
| SUBTYPE ParserArity OPTION LPAREN IDENT RPAREN LBRACE AbbrevConstructors RBRACE
{ enter_subtype "options" $2 $5 $8 }
| SUBTYPE ParserArity TypeName LPAREN IDENT RPAREN LBRACE AbbrevConstructors RBRACE
{ enter_subtype $3 $2 $5 $8 }
| Command
{ enter_function $1 }
| WIDGET IDENT LBRACE WidgetComponents RBRACE
{ enter_widget $2 $4 }
| MODULE IDENT LBRACE ModuleComponents RBRACE
{ enter_module $2 $4 }
| EOF
{ raise End_of_file }
;
|
