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|
#
# idlparse.py
#
# an example of using the parsing module to be able to process a subset of the CORBA IDL grammar
#
# Copyright (c) 2003, Paul McGuire
#
from pyparsing import Literal, CaselessLiteral, Word, OneOrMore, ZeroOrMore, \
Forward, NotAny, delimitedList, oneOf, Group, Optional, Combine, alphas, nums, restOfLine, cStyleComment, \
alphanums, printables, empty, quotedString, ParseException, ParseResults, Keyword, Regex
import pprint
#~ import tree2image
bnf = None
def CORBA_IDL_BNF():
global bnf
if not bnf:
# punctuation
(colon,lbrace,rbrace,lbrack,rbrack,lparen,rparen,
equals,comma,dot,slash,bslash,star,semi,langle,rangle) = map(Literal, r":{}[]()=,./\*;<>")
# keywords
(any_, attribute_, boolean_, case_, char_, const_, context_, default_, double_, enum_, exception_,
FALSE_, fixed_, float_, inout_, interface_, in_, long_, module_, Object_, octet_, oneway_, out_, raises_,
readonly_, sequence_, short_, string_, struct_, switch_, TRUE_, typedef_, unsigned_, union_, void_,
wchar_, wstring_) = map(Keyword, """any attribute boolean case char const context
default double enum exception FALSE fixed float inout interface in long module
Object octet oneway out raises readonly sequence short string struct switch
TRUE typedef unsigned union void wchar wstring""".split())
identifier = Word( alphas, alphanums + "_" ).setName("identifier")
real = Regex(r"[+-]?\d+\.\d*([Ee][+-]?\d+)?").setName("real")
integer = Regex(r"0x[0-9a-fA-F]+|[+-]?\d+").setName("int")
udTypeName = delimitedList( identifier, "::", combine=True ).setName("udType")
typeName = ( any_ | boolean_ | char_ | double_ | fixed_ |
float_ | long_ | octet_ | short_ | string_ |
wchar_ | wstring_ | udTypeName ).setName("type")
sequenceDef = Forward().setName("seq")
sequenceDef << Group( sequence_ + langle + ( sequenceDef | typeName ) + rangle )
typeDef = sequenceDef | ( typeName + Optional( lbrack + integer + rbrack ) )
typedefDef = Group( typedef_ + typeDef + identifier + semi ).setName("typedef")
moduleDef = Forward()
constDef = Group( const_ + typeDef + identifier + equals + ( real | integer | quotedString ) + semi ) #| quotedString )
exceptionItem = Group( typeDef + identifier + semi )
exceptionDef = ( exception_ + identifier + lbrace + ZeroOrMore( exceptionItem ) + rbrace + semi )
attributeDef = Optional( readonly_ ) + attribute_ + typeDef + identifier + semi
paramlist = delimitedList( Group( ( inout_ | in_ | out_ ) + typeName + identifier ) ).setName( "paramlist" )
operationDef = ( ( void_ ^ typeDef ) + identifier + lparen + Optional( paramlist ) + rparen + \
Optional( raises_ + lparen + Group( delimitedList( typeName ) ) + rparen ) + semi )
interfaceItem = ( constDef | exceptionDef | attributeDef | operationDef )
interfaceDef = Group( interface_ + identifier + Optional( colon + delimitedList( typeName ) ) + lbrace + \
ZeroOrMore( interfaceItem ) + rbrace + semi ).setName("opnDef")
moduleItem = ( interfaceDef | exceptionDef | constDef | typedefDef | moduleDef )
moduleDef << module_ + identifier + lbrace + ZeroOrMore( moduleItem ) + rbrace + semi
bnf = ( moduleDef | OneOrMore( moduleItem ) )
singleLineComment = "//" + restOfLine
bnf.ignore( singleLineComment )
bnf.ignore( cStyleComment )
return bnf
testnum = 1
def test( strng ):
global testnum
print(strng)
try:
bnf = CORBA_IDL_BNF()
tokens = bnf.parseString( strng )
print("tokens = ")
pprint.pprint( tokens.asList() )
imgname = "idlParse%02d.bmp" % testnum
testnum += 1
#~ tree2image.str2image( str(tokens.asList()), imgname )
except ParseException as err:
print(err.line)
print(" "*(err.column-1) + "^")
print(err)
print()
if __name__ == "__main__":
test(
"""
/*
* a block comment *
*/
typedef string[10] tenStrings;
typedef sequence<string> stringSeq;
typedef sequence< sequence<string> > stringSeqSeq;
interface QoSAdmin {
stringSeq method1( in string arg1, inout long arg2 );
stringSeqSeq method2( in string arg1, inout long arg2, inout long arg3);
string method3();
};
"""
)
test(
"""
/*
* a block comment *
*/
typedef string[10] tenStrings;
typedef
/** ** *** **** *
* a block comment *
*/
sequence<string> /*comment inside an And */ stringSeq;
/* */ /**/ /***/ /****/
typedef sequence< sequence<string> > stringSeqSeq;
interface QoSAdmin {
stringSeq method1( in string arg1, inout long arg2 );
stringSeqSeq method2( in string arg1, inout long arg2, inout long arg3);
string method3();
};
"""
)
test(
r"""
const string test="Test String\n";
const long a = 0;
const long b = -100;
const float c = 3.14159;
const long d = 0x007f7f7f;
exception TestException
{
string msg;
sequence<string> dataStrings;
};
interface TestInterface
{
void method1( in string arg1, inout long arg2 );
};
"""
)
test(
"""
module Test1
{
exception TestException
{
string msg;
];
interface TestInterface
{
void method1( in string arg1, inout long arg2 )
raises ( TestException );
};
};
"""
)
test(
"""
module Test1
{
exception TestException
{
string msg;
};
};
"""
)
|
