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#
# This file is derived from
#
# https://github.com/varlink/rust/blob/master/varlink_parser/src/varlink_grammar.rustpeg
#
# Using the file in MIT License is allowed in https://github.com/varlink/rust/issues/20.
#
########################################################################
#
# MIT License
#
# Copyright (c) 2016 - 2018 Red Hat, Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
#
########################################################################
#
# This module contains PEG grammer and functions for generating tags
# for varlink IDL:
#
# * https://github.com/varlink
# * https://varlink.org/Interface-Definition
#
# varlink_grammar.rustpeg uses ** and ++ extended operators.
# peg processor written in Rust can understand the operators.
# However, packcc doesn't do. So ** and ++ are replaced with
# rules without ** and ++ operators.
#
# This parser is the test-bed for using packcc in ctags.
#
# TODO
#
# * revise scope field for field value
# * implement typeref and signature fields
#
#
# To avoid conflicting names in code generated by packcc and code written manually,
# add "p" as prefix to names in generated code.
#
%prefix "pvarlink"
%auxil "struct parserCtx *"
%header {
struct parserCtx;
}
%source {
#include "varlink_pre.h"
}
#
# Packcc tries to apply the first grammar rule in the input.
#
interface
<- _* "interface" _+ interface_name eol ( member_list ) _*
# Modeled after ECMA-262, 5th ed., 7.2. \v\f removed
whitespace
<- [ \t\u00A0\uFEFF\u1680\u180E\u2000-\u200A\u202F\u205F\u3000]
# Modeled after ECMA-262, 5th ed., 7.3.
eol_r
<- "\n"
/ "\r\n"
/ "\r"
/ "\u2028"
/ "\u2029"
comment
<- "#" [^\n\r\u2028\u2029]* eol_r
eol
<- whitespace* eol_r
/ comment
_
<- whitespace / comment / eol_r
field_name
<- < [A-Za-z]('_'?[A-Za-z0-9])* > {
makeVarlinkTag(auxil, $1, $1s);
}
field_name_list
<- field_name (_* ',' _* field_name)*
name
<- < [A-Z][A-Za-z0-9]* > {
if (peekKind(auxil) != KIND_GHOST_INDEX)
auxil->scope_cork_index = makeVarlinkTag(auxil, $1, $1s);
}
interface_name
<- < [a-z]([-]* [a-z0-9])* ( '.' [a-z0-9]([-]*[a-z0-9])* )+ > {
auxil->scope_cork_index = makeVarlinkTag(auxil, $1, $1s);
}
dict
<- "[string]"
array
<- "[]"
maybe
<- "?"
element_type
<- "bool"
/ "int"
/ "float"
/ "string"
/ "object"
/ { pushKind (auxil, KIND_GHOST_INDEX); } name { popKind (auxil, false); }
/ venum
/ vstruct
type
<- element_type
/ maybe element_type
/ array type
/ dict type
/ maybe array type
/ maybe dict type
venum
<- { pushKind (auxil, K_ENUMERATION); } '(' _* field_name_list? _* ')' { popKind (auxil, false); }
argument
<- _* field_name _* ':' _* type
argument_list
<- argument (_* ',' _* argument)*
vstruct
<- { pushKindContextual (auxil); } '(' _* argument_list? _* ')' { popKind (auxil, false); }
vtypedef
<- "type" { pushKind (auxil, K_STRUCT); } _+ name _* vstruct { popKind (auxil, true); }
/ "type" { pushKind (auxil, K_ENUM); } _+ name _* venum { popKind (auxil, true); }
error
<- "error" { pushKind (auxil, K_ERROR); } _+ name _* vstruct { popKind (auxil, true); }
method
<- "method" {
pushKind(auxil, K_METHOD); setMethodParamState (auxil, METHOD_PARAM_INPUT);
} _+ name _* vstruct _* {
setMethodParamState (auxil, METHOD_PARAM_OUTPUT);
} "->" _* vstruct { popKind (auxil, true); }
member
<- _* m:method
/ _* t:vtypedef
/ _* e:error
member_list
<- member (eol member)*
%%
#include "varlink_post.h"
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