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|
%{ (* -*- caml -*- *)
open Types
open Common
let parse_error _ =
failwith (Info.pos2sfull_current (Parsing.symbol_start()) (Parsing.symbol_end()) ^ "parse error")
let to_Ident = function
| BAREWORD(name, pos) -> Ident(I_raw, None, name, pos)
| SCALAR_IDENT(fq, name, pos) -> Ident(I_scalar, fq, name, pos)
| ARRAY_IDENT (fq, name, pos) -> Ident(I_array, fq, name, pos)
| HASH_IDENT (fq, name, pos) -> Ident(I_hash, fq, name, pos)
| FUNC_IDENT (fq, name, pos) -> Ident(I_func, fq, name, pos)
| STAR_IDENT (fq, name, pos) -> Ident(I_star, fq, name, pos)
| RAW_IDENT (fq, name, pos) -> Ident(I_raw, fq, name, pos)
| _ -> internal_error "Parser.to_Ident"
%}
%token EOF
%token <Types.pos> SPACE
%token <string * Types.pos> NUM STRING BAREWORD PROTOTYPE REVISION COMMENT POD LABEL
%token <string * Types.pos> COMMAND_STRING QUOTEWORDS
%token <(string * Types.pos) ref> HERE_DOC
%token <string * string * Types.pos> PATTERN
%token <string * string * string * Types.pos> PATTERN_SUBST
%token <string option * string * Types.pos> SCALAR_IDENT ARRAY_IDENT HASH_IDENT FUNC_IDENT STAR_IDENT RAW_IDENT ARRAYLEN_IDENT
%token IF ELSIF ELSE UNLESS DO WHILE UNTIL MY CONTINUE SUB LOCAL
%token <string> FOR
%token USE PACKAGE FORMAT
%token <Types.pos> PRINT NEW
%token AT DOLLAR PERCENT AMPERSAND STAR ARRAYLEN
%token SEMI_COLON PKG_SCOPE
%token PAREN PAREN_END
%token BRACKET BRACKET_END
%token ARRAYREF ARRAYREF_END
%token ARROW
%token INCR DECR
%token POWER
%token TIGHT_NOT BIT_NEG REF
%token PATTERN_MATCH PATTERN_MATCH_NOT
%token MULT DIVISION MODULO REPLICATE
%token PLUS MINUS CONCAT
%token BIT_SHIFT_LEFT BIT_SHIFT_RIGHT
%token <string> COMPARE_OP EQ_OP
%token BIT_AND
%token BIT_OR BIT_XOR
%token AND_TIGHT
%token OR_TIGHT
%token DOTDOT DOTDOTDOT
%token QUESTION_MARK COLON
%token <string> ASSIGN
%token COMMA RIGHT_ARROW
%token NOT
%token AND
%token OR XOR
%nonassoc PREC_LOW
%nonassoc LOOPEX
%left OR XOR
%left AND
%right NOT
%nonassoc LSTOP
%left COMMA RIGHT_ARROW
%right ASSIGN
%right QUESTION_MARK COLON
%nonassoc DOTDOT DOTDOTDOT
%left OR_TIGHT
%left AND_TIGHT
%left BIT_OR BIT_XOR
%left BIT_AND
%nonassoc EQ_OP
%nonassoc COMPARE_OP
%nonassoc UNIOP
%left BIT_SHIFT_LEFT BIT_SHIFT_RIGHT
%left PLUS MINUS CONCAT
%left MULT DIVISION MODULO REPLICATE
%left PATTERN_MATCH PATTERN_MATCH_NOT
%right TIGHT_NOT BIT_NEG REF UNARY_MINUS
%right POWER
%nonassoc INCR DECR
%left ARROW
%nonassoc PAREN_END
%left PAREN
%left ARRAYREF BRACKET
%type <string> prog
%start prog
%%
prog: lineseq EOF { "" }
block: BRACKET lineseq BRACKET_END { $2 }
lineseq: /* A collection of "lines" in the program */
| {[]}
| decl lineseq {[]}
| label line {[]}
line:
| if_then_else lineseq { [] }
| loop lineseq { [] }
| SEMI_COLON lineseq { [] }
| sideff SEMI_COLON lineseq { [] }
| sideff { [] }
if_then_else: /* Real conditional expressions */
| IF PAREN expr PAREN_END block elsif else_ {[]}
| UNLESS PAREN expr PAREN_END block elsif else_ {[]}
elsif:
| { [] }
| ELSIF PAREN expr PAREN_END block elsif { [ $3, $5 ] @ $6 }
else_:
| { None }
| ELSE block { Some $2 }
loop:
| WHILE PAREN expr_or_empty PAREN_END block cont {[]}
| UNTIL PAREN expr PAREN_END block cont {[]}
| FOR MY SCALAR_IDENT PAREN expr PAREN_END block cont {[]}
| FOR SCALAR_IDENT PAREN expr PAREN_END block cont {[]}
| FOR PAREN expr PAREN_END block cont {[]}
| FOR PAREN expr_or_empty ';' expr_or_empty ';' expr_or_empty PAREN_END block {[]}
| block cont {[]} /* a block is a loop that happens once */
cont: /* Continue blocks */
| {[]}
| CONTINUE block {[]}
sideff: /* An expression which may have a side-effect */
| error { [] }
| expr { $1 }
| expr IF expr { [ (*Binary("if", $1, $3)*) ] }
| expr UNLESS expr { [ (*Binary("unless", $1, $3)*) ] }
| expr WHILE expr { [ (*Binary("while", $1, $3)*) ] }
| expr UNTIL expr { [ (*Binary("until", $1, $3)*) ] }
| expr FOR expr { [ (*Binary($2, $1, $3)*) ] }
decl:
| FORMAT formname block {[]}
| SUB word prototype_or_empty subbody {[]}
| PACKAGE word SEMI_COLON {[]}
| USE word_or_empty revision_or_empty listexpr SEMI_COLON {[]}
formname: {[]} | BAREWORD {[]}
subbody: block { $1 } | SEMI_COLON {[]}
listexpr: /* Basic list expressions */
| %prec PREC_LOW {[]}
| argexpr %prec PREC_LOW {[]}
expr: /* Ordinary expressions; logical combinations */
| expr AND expr {[]}
| expr OR expr {[]}
| argexpr %prec PREC_LOW {[]}
argexpr: /* Expressions are a list of terms joined by commas */
| argexpr comma {[]}
| argexpr comma term {[]}
| term %prec PREC_LOW {[]}
term:
| term binop term {[]}
| termunop {[]}
| anonymous {[]}
| termdo {[]}
| term QUESTION_MARK term COLON term {[]}
| REF term {[]} /* \$x, \@y, \%z */
| MY myterm %prec UNIOP {[]}
| LOCAL term %prec UNIOP {[]}
| PAREN expr_or_empty PAREN_END {[]}
| scalar %prec PAREN {[]}
| star %prec PAREN {[]}
| hash %prec PAREN {[]}
| array %prec PAREN {[]}
| arraylen %prec PAREN {[]} /* $#x, $#{ something } */
| subscripted {[]}
| PAREN expr_or_empty PAREN_END ARRAYREF expr ARRAYREF_END {[]} /* list slice */
| array ARRAYREF expr ARRAYREF_END {[]} /* array slice */
| array BRACKET expr BRACKET_END {[]} /* @hash{@keys} */
| function_call {[]}
| word {[]}
| NUM {[]}
| STRING {[]}
| REVISION {[]}
| COMMAND_STRING {[]}
| QUOTEWORDS {[]}
| HERE_DOC {[]}
function_call:
| func {[]} /* &foo; */
| func PAREN expr_or_empty PAREN_END {[]} /* &foo(@args) */
| word argexpr {[]} /* foo(@args) */
| word block listexpr %prec LSTOP {[]} /* map { foo } @bar */
| term ARROW word_or_scalar PAREN expr_or_empty PAREN_END {[]} /* $foo->bar(list) */
| term ARROW word_or_scalar {[]} /* $foo->bar */
| NEW word listexpr {[]} /* new Class @args */
| PRINT word_or_scalar argexpr {[]} /* print $fh @args */
termdo: /* Things called with "do" */
| DO term %prec UNIOP {[]} /* do $filename */
| DO block %prec PAREN {[]} /* do { code */
termunop: /* Unary operators and terms */
| MINUS term %prec UNARY_MINUS {[]}
| TIGHT_NOT term {[]}
| BIT_NEG term {[]}
| INCR term {[]}
| DECR term {[]}
| term INCR {[]}
| term DECR {[]}
| NOT argexpr {[]}
myterm: /* Things that can be "my"'d */
| PAREN expr_or_empty PAREN_END {[]}
| scalar {[]}
| hash {[]}
| array {[]}
subscripted: /* Some kind of subscripted expression */
| star PKG_SCOPE BRACKET expr BRACKET_END {[]} /* *main::{something} */
| scalar ARRAYREF expr ARRAYREF_END {[]} /* $array[$element] */
| scalar BRACKET expr BRACKET_END {[]} /* $foo{bar} */
| term ARROW ARRAYREF expr ARRAYREF_END {[]} /* somearef->[$element] */
| term ARROW BRACKET expr BRACKET_END {[]} /* somehref->{bar} */
| term ARROW PAREN expr_or_empty PAREN_END {[]} /* $subref->(@args) */
| subscripted ARRAYREF expr ARRAYREF_END {[]} /* $foo->[$bar][$baz] */
| subscripted BRACKET expr BRACKET_END {[]} /* $foo->[bar]{baz;} */
| subscripted PAREN expr_or_empty PAREN_END {[]} /* $foo->{bar}(@args) */
binop:
| ASSIGN {[]}
| POWER {[]}
| MULT {[]} | DIVISION {[]} | MODULO {[]} | REPLICATE {[]}
| PLUS {[]} | MINUS {[]} | CONCAT {[]}
| BIT_SHIFT_LEFT {[]} | BIT_SHIFT_RIGHT {[]}
| COMPARE_OP {[]}
| EQ_OP {[]}
| BIT_AND {[]}
| BIT_OR {[]} | BIT_XOR {[]}
| DOTDOT {[]} | DOTDOTDOT {[]}
| AND_TIGHT {[]}
| OR_TIGHT {[]} | XOR {[]}
| PATTERN_MATCH {[]} | PATTERN_MATCH_NOT {[]}
anonymous: /* Constructors for anonymous data */
| ARRAYREF expr_or_empty ARRAYREF_END {[]}
| BRACKET expr_or_empty BRACKET_END %prec PAREN {[]} /* { foo => "Bar" } */
| SUB prototype_or_empty block %prec PAREN {[]}
label:
| { None }
| BAREWORD COLON { Some $1 }
word:
| bareword { fst $1 }
| RAW_IDENT {
match $1 with
| None, name, _ -> name
| Some s, name, _ -> s ^ "::" ^ name
}
comma: COMMA {[]} | RIGHT_ARROW {[]}
word_or_scalar:
| bareword { [] }
| RAW_IDENT { [] }
| SCALAR_IDENT { [] }
bareword:
| NEW { "new", $1 }
| PRINT { "print", $1 }
| BAREWORD { $1 }
arraylen: ARRAYLEN_IDENT {[]} | ARRAYLEN block {[]}
scalar: SCALAR_IDENT {[]} | DOLLAR block {[]}
func: FUNC_IDENT {[]} | AMPERSAND block {[]}
array: ARRAY_IDENT {[]} | AT block {[]}
hash: HASH_IDENT {[]} | PERCENT block {[]}
star: STAR_IDENT {[]} | STAR block {[]}
expr_or_empty: {[]} | expr {[]}
word_or_empty: {[]} | word {[]}
prototype_or_empty: {[]} | PROTOTYPE {[]}
revision_or_empty: {[]} | REVISION {[]}
|