8e01b6db48
This allows you to omit a resource parameter programmatically, and avoids the need of an `undef` or `nil` in our language, which would contribute to programming errors, crashes, and overall reduced safety.
906 lines
19 KiB
Plaintext
906 lines
19 KiB
Plaintext
// Mgmt
|
|
// Copyright (C) 2013-2018+ James Shubin and the project contributors
|
|
// Written by James Shubin <james@shubin.ca> and the project contributors
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
%{
|
|
package lang
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
|
|
"github.com/purpleidea/mgmt/lang/interfaces"
|
|
"github.com/purpleidea/mgmt/lang/types"
|
|
)
|
|
|
|
const (
|
|
errstrParseAdditionalEquals = "additional equals in bind statement"
|
|
errstrParseExpectingComma = "expecting trailing comma"
|
|
)
|
|
|
|
func init() {
|
|
yyErrorVerbose = true // set the global that enables showing full errors
|
|
}
|
|
%}
|
|
|
|
%union {
|
|
row int
|
|
col int
|
|
|
|
//err error // TODO: if we ever match ERROR in the parser
|
|
|
|
bool bool
|
|
str string
|
|
int int64 // this is the .int as seen in lexer.nex
|
|
float float64
|
|
|
|
strSlice []string
|
|
|
|
typ *types.Type
|
|
|
|
stmts []interfaces.Stmt
|
|
stmt interfaces.Stmt
|
|
|
|
exprs []interfaces.Expr
|
|
expr interfaces.Expr
|
|
|
|
mapKVs []*ExprMapKV
|
|
mapKV *ExprMapKV
|
|
|
|
structFields []*ExprStructField
|
|
structField *ExprStructField
|
|
|
|
resFields []*StmtResField
|
|
resField *StmtResField
|
|
|
|
edgeHalfList []*StmtEdgeHalf
|
|
edgeHalf *StmtEdgeHalf
|
|
}
|
|
|
|
%token OPEN_CURLY CLOSE_CURLY
|
|
%token OPEN_PAREN CLOSE_PAREN
|
|
%token OPEN_BRACK CLOSE_BRACK
|
|
%token IF ELSE
|
|
%token STRING BOOL INTEGER FLOAT
|
|
%token EQUALS
|
|
%token COMMA COLON SEMICOLON
|
|
%token ELVIS ROCKET ARROW DOT
|
|
%token STR_IDENTIFIER BOOL_IDENTIFIER INT_IDENTIFIER FLOAT_IDENTIFIER
|
|
%token STRUCT_IDENTIFIER VARIANT_IDENTIFIER VAR_IDENTIFIER IDENTIFIER
|
|
%token VAR_IDENTIFIER_HX CAPITALIZED_IDENTIFIER
|
|
%token COMMENT ERROR
|
|
|
|
// precedence table
|
|
// "Operator precedence is determined by the line ordering of the declarations;
|
|
// the higher the line number of the declaration (lower on the page or screen),
|
|
// the higher the precedence."
|
|
// From: https://www.gnu.org/software/bison/manual/html_node/Infix-Calc.html
|
|
// FIXME: a yacc specialist should check the precedence and add more tests!
|
|
%left AND OR
|
|
%nonassoc LT GT LTE GTE EQ NEQ // TODO: is %nonassoc correct for all of these?
|
|
%left PLUS MINUS
|
|
%left MULTIPLY DIVIDE
|
|
%right NOT
|
|
//%right EXP // exponentiation
|
|
%nonassoc IN // TODO: is %nonassoc correct for this?
|
|
|
|
%error IDENTIFIER STRING OPEN_CURLY IDENTIFIER ROCKET BOOL CLOSE_CURLY: errstrParseExpectingComma
|
|
%error IDENTIFIER STRING OPEN_CURLY IDENTIFIER ROCKET STRING CLOSE_CURLY: errstrParseExpectingComma
|
|
%error IDENTIFIER STRING OPEN_CURLY IDENTIFIER ROCKET INTEGER CLOSE_CURLY: errstrParseExpectingComma
|
|
%error IDENTIFIER STRING OPEN_CURLY IDENTIFIER ROCKET FLOAT CLOSE_CURLY: errstrParseExpectingComma
|
|
|
|
%error VAR_IDENTIFIER EQ BOOL: errstrParseAdditionalEquals
|
|
%error VAR_IDENTIFIER EQ STRING: errstrParseAdditionalEquals
|
|
%error VAR_IDENTIFIER EQ INTEGER: errstrParseAdditionalEquals
|
|
%error VAR_IDENTIFIER EQ FLOAT: errstrParseAdditionalEquals
|
|
|
|
%%
|
|
top:
|
|
prog
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
// store the AST in the struct that we previously passed in
|
|
lp := cast(yylex)
|
|
lp.ast = $1.stmt
|
|
// this is equivalent to:
|
|
//lp := yylex.(*Lexer).parseResult
|
|
//lp.(*lexParseAST).ast = $1.stmt
|
|
}
|
|
;
|
|
prog:
|
|
/* end of list */
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.stmt = &StmtProg{
|
|
Prog: []interfaces.Stmt{},
|
|
}
|
|
}
|
|
| prog stmt
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
// TODO: should we just skip comments for now?
|
|
//if _, ok := $2.stmt.(*StmtComment); !ok {
|
|
//}
|
|
if stmt, ok := $1.stmt.(*StmtProg); ok {
|
|
stmts := stmt.Prog
|
|
stmts = append(stmts, $2.stmt)
|
|
$$.stmt = &StmtProg{
|
|
Prog: stmts,
|
|
}
|
|
}
|
|
}
|
|
;
|
|
stmt:
|
|
COMMENT
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.stmt = &StmtComment{
|
|
Value: $1.str,
|
|
}
|
|
}
|
|
| bind
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.stmt = $1.stmt
|
|
}
|
|
| resource
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.stmt = $1.stmt
|
|
}
|
|
| edge
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.stmt = $1.stmt
|
|
}
|
|
| IF expr OPEN_CURLY prog CLOSE_CURLY
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.stmt = &StmtIf{
|
|
Condition: $2.expr,
|
|
ThenBranch: $4.stmt,
|
|
//ElseBranch: nil,
|
|
}
|
|
}
|
|
| IF expr OPEN_CURLY prog CLOSE_CURLY ELSE OPEN_CURLY prog CLOSE_CURLY
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.stmt = &StmtIf{
|
|
Condition: $2.expr,
|
|
ThenBranch: $4.stmt,
|
|
ElseBranch: $8.stmt,
|
|
}
|
|
}
|
|
/*
|
|
// resource bind
|
|
| rbind
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.stmt = $1.stmt
|
|
}
|
|
*/
|
|
;
|
|
expr:
|
|
BOOL
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprBool{
|
|
V: $1.bool,
|
|
}
|
|
}
|
|
| STRING
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprStr{
|
|
V: $1.str,
|
|
}
|
|
}
|
|
| INTEGER
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprInt{
|
|
V: $1.int,
|
|
}
|
|
}
|
|
| FLOAT
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprFloat{
|
|
V: $1.float,
|
|
}
|
|
}
|
|
| list
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
// TODO: list could be squashed in here directly...
|
|
$$.expr = $1.expr
|
|
}
|
|
| map
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
// TODO: map could be squashed in here directly...
|
|
$$.expr = $1.expr
|
|
}
|
|
| struct
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
// TODO: struct could be squashed in here directly...
|
|
$$.expr = $1.expr
|
|
}
|
|
| call
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
// TODO: call could be squashed in here directly...
|
|
$$.expr = $1.expr
|
|
}
|
|
| var
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
// TODO: var could be squashed in here directly...
|
|
$$.expr = $1.expr
|
|
}
|
|
| IF expr OPEN_CURLY expr CLOSE_CURLY ELSE OPEN_CURLY expr CLOSE_CURLY
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprIf{
|
|
Condition: $2.expr,
|
|
ThenBranch: $4.expr,
|
|
ElseBranch: $8.expr,
|
|
}
|
|
}
|
|
// parenthesis wrap an expression for precedence
|
|
| OPEN_PAREN expr CLOSE_PAREN
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = $2.expr
|
|
}
|
|
;
|
|
list:
|
|
// `[42, 0, -13]`
|
|
OPEN_BRACK list_elements CLOSE_BRACK
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprList{
|
|
Elements: $2.exprs,
|
|
}
|
|
}
|
|
;
|
|
list_elements:
|
|
/* end of list */
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.exprs = []interfaces.Expr{}
|
|
}
|
|
| list_elements list_element
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.exprs = append($1.exprs, $2.expr)
|
|
}
|
|
;
|
|
list_element:
|
|
expr COMMA
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = $1.expr
|
|
}
|
|
;
|
|
map:
|
|
// `{"hello" => "there", "world" => "big", }`
|
|
OPEN_CURLY map_kvs CLOSE_CURLY
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprMap{
|
|
KVs: $2.mapKVs,
|
|
}
|
|
}
|
|
;
|
|
map_kvs:
|
|
/* end of list */
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.mapKVs = []*ExprMapKV{}
|
|
}
|
|
| map_kvs map_kv
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.mapKVs = append($1.mapKVs, $2.mapKV)
|
|
}
|
|
;
|
|
map_kv:
|
|
expr ROCKET expr COMMA
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.mapKV = &ExprMapKV{
|
|
Key: $1.expr,
|
|
Val: $3.expr,
|
|
}
|
|
}
|
|
;
|
|
struct:
|
|
// `struct{answer => 0, truth => false, hello => "world",}`
|
|
STRUCT_IDENTIFIER OPEN_CURLY struct_fields CLOSE_CURLY
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprStruct{
|
|
Fields: $3.structFields,
|
|
}
|
|
}
|
|
;
|
|
struct_fields:
|
|
/* end of list */
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.structFields = []*ExprStructField{}
|
|
}
|
|
| struct_fields struct_field
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.structFields = append($1.structFields, $2.structField)
|
|
}
|
|
;
|
|
struct_field:
|
|
IDENTIFIER ROCKET expr COMMA
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.structField = &ExprStructField{
|
|
Name: $1.str,
|
|
Value: $3.expr,
|
|
}
|
|
}
|
|
;
|
|
call:
|
|
IDENTIFIER OPEN_PAREN call_args CLOSE_PAREN
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprCall{
|
|
Name: $1.str,
|
|
Args: $3.exprs,
|
|
}
|
|
}
|
|
| expr PLUS expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprCall{
|
|
Name: operatorFuncName,
|
|
Args: []interfaces.Expr{
|
|
&ExprStr{ // operator first
|
|
V: $2.str, // for PLUS this is a `+` character
|
|
},
|
|
$1.expr,
|
|
$3.expr,
|
|
},
|
|
}
|
|
}
|
|
| expr MINUS expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprCall{
|
|
Name: operatorFuncName,
|
|
Args: []interfaces.Expr{
|
|
&ExprStr{ // operator first
|
|
V: $2.str,
|
|
},
|
|
$1.expr,
|
|
$3.expr,
|
|
},
|
|
}
|
|
}
|
|
| expr MULTIPLY expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprCall{
|
|
Name: operatorFuncName,
|
|
Args: []interfaces.Expr{
|
|
&ExprStr{ // operator first
|
|
V: $2.str,
|
|
},
|
|
$1.expr,
|
|
$3.expr,
|
|
},
|
|
}
|
|
}
|
|
| expr DIVIDE expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprCall{
|
|
Name: operatorFuncName,
|
|
Args: []interfaces.Expr{
|
|
&ExprStr{ // operator first
|
|
V: $2.str,
|
|
},
|
|
$1.expr,
|
|
$3.expr,
|
|
},
|
|
}
|
|
}
|
|
| expr EQ expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprCall{
|
|
Name: operatorFuncName,
|
|
Args: []interfaces.Expr{
|
|
&ExprStr{ // operator first
|
|
V: $2.str,
|
|
},
|
|
$1.expr,
|
|
$3.expr,
|
|
},
|
|
}
|
|
}
|
|
| expr NEQ expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprCall{
|
|
Name: operatorFuncName,
|
|
Args: []interfaces.Expr{
|
|
&ExprStr{ // operator first
|
|
V: $2.str,
|
|
},
|
|
$1.expr,
|
|
$3.expr,
|
|
},
|
|
}
|
|
}
|
|
| expr LT expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprCall{
|
|
Name: operatorFuncName,
|
|
Args: []interfaces.Expr{
|
|
&ExprStr{ // operator first
|
|
V: $2.str,
|
|
},
|
|
$1.expr,
|
|
$3.expr,
|
|
},
|
|
}
|
|
}
|
|
| expr GT expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprCall{
|
|
Name: operatorFuncName,
|
|
Args: []interfaces.Expr{
|
|
&ExprStr{ // operator first
|
|
V: $2.str,
|
|
},
|
|
$1.expr,
|
|
$3.expr,
|
|
},
|
|
}
|
|
}
|
|
| expr LTE expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprCall{
|
|
Name: operatorFuncName,
|
|
Args: []interfaces.Expr{
|
|
&ExprStr{ // operator first
|
|
V: $2.str,
|
|
},
|
|
$1.expr,
|
|
$3.expr,
|
|
},
|
|
}
|
|
}
|
|
| expr GTE expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprCall{
|
|
Name: operatorFuncName,
|
|
Args: []interfaces.Expr{
|
|
&ExprStr{ // operator first
|
|
V: $2.str,
|
|
},
|
|
$1.expr,
|
|
$3.expr,
|
|
},
|
|
}
|
|
}
|
|
| expr AND expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprCall{
|
|
Name: operatorFuncName,
|
|
Args: []interfaces.Expr{
|
|
&ExprStr{ // operator first
|
|
V: $2.str,
|
|
},
|
|
$1.expr,
|
|
$3.expr,
|
|
},
|
|
}
|
|
}
|
|
| expr OR expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprCall{
|
|
Name: operatorFuncName,
|
|
Args: []interfaces.Expr{
|
|
&ExprStr{ // operator first
|
|
V: $2.str,
|
|
},
|
|
$1.expr,
|
|
$3.expr,
|
|
},
|
|
}
|
|
}
|
|
| NOT expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprCall{
|
|
Name: operatorFuncName,
|
|
Args: []interfaces.Expr{
|
|
&ExprStr{ // operator first
|
|
V: $1.str,
|
|
},
|
|
$2.expr,
|
|
},
|
|
}
|
|
}
|
|
| VAR_IDENTIFIER_HX
|
|
// get the N-th historical value, eg: $foo{3} is equivalent to: history($foo, 3)
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprCall{
|
|
Name: historyFuncName,
|
|
Args: []interfaces.Expr{
|
|
&ExprVar{
|
|
Name: $1.str,
|
|
},
|
|
&ExprInt{
|
|
V: $1.int,
|
|
},
|
|
},
|
|
}
|
|
}
|
|
//| VAR_IDENTIFIER OPEN_CURLY INTEGER CLOSE_CURLY
|
|
// {
|
|
// posLast(yylex, yyDollar) // our pos
|
|
// $$.expr = &ExprCall{
|
|
// Name: historyFuncName,
|
|
// Args: []interfaces.Expr{
|
|
// &ExprVar{
|
|
// Name: $1.str,
|
|
// },
|
|
// &ExprInt{
|
|
// V: $3.int,
|
|
// },
|
|
// },
|
|
// }
|
|
// }
|
|
| expr IN expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprCall{
|
|
Name: containsFuncName,
|
|
Args: []interfaces.Expr{
|
|
$1.expr,
|
|
$3.expr,
|
|
},
|
|
}
|
|
}
|
|
;
|
|
// list order gets us the position of the arg, but named params would work too!
|
|
call_args:
|
|
/* end of list */
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.exprs = []interfaces.Expr{}
|
|
}
|
|
// seems that "left recursion" works here... thanks parser generator!
|
|
| call_args COMMA expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.exprs = append($1.exprs, $3.expr)
|
|
}
|
|
| expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.exprs = append([]interfaces.Expr{}, $1.expr)
|
|
}
|
|
;
|
|
var:
|
|
VAR_IDENTIFIER
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.expr = &ExprVar{
|
|
Name: $1.str,
|
|
}
|
|
}
|
|
;
|
|
bind:
|
|
VAR_IDENTIFIER EQUALS expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.stmt = &StmtBind{
|
|
Ident: $1.str,
|
|
Value: $3.expr,
|
|
}
|
|
}
|
|
| VAR_IDENTIFIER type EQUALS expr
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
var expr interfaces.Expr = $4.expr
|
|
if err := expr.SetType($2.typ); err != nil {
|
|
panic(fmt.Sprintf("can't set type in parser: %+v", err))
|
|
}
|
|
$$.stmt = &StmtBind{
|
|
Ident: $1.str,
|
|
Value: expr,
|
|
}
|
|
}
|
|
;
|
|
/* TODO: do we want to include this?
|
|
// resource bind
|
|
rbind:
|
|
VAR_IDENTIFIER EQUALS resource
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
// XXX: this kind of bind is different than the others, because
|
|
// it can only really be used for send->recv stuff, eg:
|
|
// foo.SomeString -> bar.SomeOtherString
|
|
$$.expr = &StmtBind{
|
|
Ident: $1.str,
|
|
Value: $3.stmt,
|
|
}
|
|
}
|
|
;
|
|
*/
|
|
resource:
|
|
IDENTIFIER expr OPEN_CURLY resource_body CLOSE_CURLY
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.stmt = &StmtRes{
|
|
Kind: $1.str,
|
|
Name: $2.expr,
|
|
Fields: $4.resFields,
|
|
}
|
|
}
|
|
;
|
|
resource_body:
|
|
/* end of list */
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.resFields = []*StmtResField{}
|
|
}
|
|
| resource_body resource_field
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.resFields = append($1.resFields, $2.resField)
|
|
}
|
|
| resource_body conditional_resource_field
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.resFields = append($1.resFields, $2.resField)
|
|
}
|
|
;
|
|
resource_field:
|
|
IDENTIFIER ROCKET expr COMMA
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.resField = &StmtResField{
|
|
Field: $1.str,
|
|
Value: $3.expr,
|
|
}
|
|
}
|
|
;
|
|
conditional_resource_field:
|
|
// content => $present ?: "hello",
|
|
IDENTIFIER ROCKET expr ELVIS expr COMMA
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.resField = &StmtResField{
|
|
Field: $1.str,
|
|
Value: $5.expr,
|
|
Condition: $3.expr,
|
|
}
|
|
}
|
|
;
|
|
edge:
|
|
// TODO: we could technically prevent single edge_half pieces from being
|
|
// parsed, but it's probably more work than is necessary...
|
|
// Test["t1"] -> Test["t2"] -> Test["t3"] # chain or pair
|
|
edge_half_list
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.stmt = &StmtEdge{
|
|
EdgeHalfList: $1.edgeHalfList,
|
|
//Notify: false, // unused here
|
|
}
|
|
}
|
|
// Test["t1"].foo_send -> Test["t2"].blah_recv # send/recv
|
|
| edge_half_sendrecv ARROW edge_half_sendrecv
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.stmt = &StmtEdge{
|
|
EdgeHalfList: []*StmtEdgeHalf{
|
|
$1.edgeHalf,
|
|
$3.edgeHalf,
|
|
},
|
|
//Notify: false, // unused here, it is implied (i think)
|
|
}
|
|
}
|
|
;
|
|
edge_half_list:
|
|
edge_half
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.edgeHalfList = []*StmtEdgeHalf{$1.edgeHalf}
|
|
}
|
|
| edge_half_list ARROW edge_half
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.edgeHalfList = append($1.edgeHalfList, $3.edgeHalf)
|
|
}
|
|
;
|
|
edge_half:
|
|
// eg: Test["t1"]
|
|
CAPITALIZED_IDENTIFIER OPEN_BRACK expr CLOSE_BRACK
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.edgeHalf = &StmtEdgeHalf{
|
|
Kind: $1.str,
|
|
Name: $3.expr,
|
|
//SendRecv: "", // unused
|
|
}
|
|
}
|
|
;
|
|
edge_half_sendrecv:
|
|
// eg: Test["t1"].foo_send
|
|
CAPITALIZED_IDENTIFIER OPEN_BRACK expr CLOSE_BRACK DOT IDENTIFIER
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.edgeHalf = &StmtEdgeHalf{
|
|
Kind: $1.str,
|
|
Name: $3.expr,
|
|
SendRecv: $6.str,
|
|
}
|
|
}
|
|
;
|
|
type:
|
|
BOOL_IDENTIFIER
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.typ = types.NewType($1.str) // "bool"
|
|
}
|
|
| STR_IDENTIFIER
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.typ = types.NewType($1.str) // "str"
|
|
}
|
|
| INT_IDENTIFIER
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.typ = types.NewType($1.str) // "int"
|
|
}
|
|
| FLOAT_IDENTIFIER
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.typ = types.NewType($1.str) // "float"
|
|
}
|
|
| OPEN_BRACK CLOSE_BRACK type
|
|
// list: []int or [][]str (with recursion)
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.typ = types.NewType("[]" + $3.typ.String())
|
|
}
|
|
| OPEN_CURLY type COLON type CLOSE_CURLY
|
|
// map: {str: int} or {str: []int}
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.typ = types.NewType(fmt.Sprintf("{%s: %s}", $2.typ.String(), $4.typ.String()))
|
|
}
|
|
| STRUCT_IDENTIFIER OPEN_CURLY type_struct_fields CLOSE_CURLY
|
|
// struct: struct{} or struct{a bool} or struct{a bool; bb int}
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.typ = types.NewType(fmt.Sprintf("%s{%s}", $1.str, strings.Join($3.strSlice, "; ")))
|
|
}
|
|
| VARIANT_IDENTIFIER
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.typ = types.NewType($1.str) // "variant"
|
|
}
|
|
;
|
|
type_struct_fields:
|
|
/* end of list */
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.strSlice = []string{}
|
|
}
|
|
| type_struct_fields SEMICOLON type_struct_field
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.strSlice = append($1.strSlice, $3.str)
|
|
}
|
|
| type_struct_field
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.strSlice = []string{$1.str}
|
|
}
|
|
;
|
|
type_struct_field:
|
|
IDENTIFIER type
|
|
{
|
|
posLast(yylex, yyDollar) // our pos
|
|
$$.str = fmt.Sprintf("%s %s", $1.str, $2.typ.String())
|
|
}
|
|
;
|
|
%%
|
|
// pos is a helper function used to track the position in the parser.
|
|
func pos(y yyLexer, dollar yySymType) {
|
|
lp := cast(y)
|
|
lp.row = dollar.row
|
|
lp.col = dollar.col
|
|
// FIXME: in some cases the before last value is most meaningful...
|
|
//lp.row = append(lp.row, dollar.row)
|
|
//lp.col = append(lp.col, dollar.col)
|
|
//log.Printf("parse: %d x %d", lp.row, lp.col)
|
|
return
|
|
}
|
|
|
|
// cast is used to pull out the parser run-specific struct we store our AST in.
|
|
// this is usually called in the parser.
|
|
func cast(y yyLexer) *lexParseAST {
|
|
x := y.(*Lexer).parseResult
|
|
return x.(*lexParseAST)
|
|
}
|
|
|
|
// postLast pulls out the "last token" and does a pos with that. This is a hack!
|
|
func posLast(y yyLexer, dollars []yySymType) {
|
|
// pick the last token in the set matched by the parser
|
|
pos(y, dollars[len(dollars)-1]) // our pos
|
|
}
|
|
|
|
// cast is used to pull out the parser run-specific struct we store our AST in.
|
|
// this is usually called in the lexer.
|
|
func (yylex *Lexer) cast() *lexParseAST {
|
|
return yylex.parseResult.(*lexParseAST)
|
|
}
|
|
|
|
// pos is a helper function used to track the position in the lexer.
|
|
func (yylex *Lexer) pos(lval *yySymType) {
|
|
lval.row = yylex.Line()
|
|
lval.col = yylex.Column()
|
|
// TODO: we could use: `s := yylex.Text()` to calculate a delta length!
|
|
//log.Printf("lexer: %d x %d", lval.row, lval.col)
|
|
}
|
|
|
|
// Error is the error handler which gets called on a parsing error.
|
|
func (yylex *Lexer) Error(str string) {
|
|
lp := yylex.cast()
|
|
if str != "" {
|
|
// This error came from the parser. It is usually also set when
|
|
// the lexer fails, because it ends up generating ERROR tokens,
|
|
// which most parsers usually don't match and store in the AST.
|
|
err := ErrParseError // TODO: add more specific types...
|
|
if strings.HasSuffix(str, ErrParseAdditionalEquals.Error()) {
|
|
err = ErrParseAdditionalEquals
|
|
} else if strings.HasSuffix(str, ErrParseExpectingComma.Error()) {
|
|
err = ErrParseExpectingComma
|
|
}
|
|
lp.parseErr = &LexParseErr{
|
|
Err: err,
|
|
Str: str,
|
|
// FIXME: get these values, by tracking pos in parser...
|
|
// FIXME: currently, the values we get are mostly wrong!
|
|
Row: lp.row, //lp.row[len(lp.row)-1],
|
|
Col: lp.col, //lp.col[len(lp.col)-1],
|
|
}
|
|
}
|
|
}
|