def stateDeclarativeRegion(cls, parserState: ParserState):
errorMessage = "Expected one of these keywords: generic, port, begin, end."
token = parserState.Token
if isinstance(parserState.Token, CharacterToken):
if (token == "\n"):
parserState.NewToken = LinebreakToken(token)
parserState.NewBlock = LinebreakBlock(parserState.LastBlock,
parserState.NewToken)
parserState.TokenMarker = parserState.NewToken
return
elif (token == "-"):
parserState.PushState = SingleLineCommentBlock.statePossibleCommentStart
parserState.TokenMarker = token
return
elif (token == "/"):
parserState.PushState = MultiLineCommentBlock.statePossibleCommentStart
parserState.TokenMarker = token
return
elif isinstance(token, SpaceToken):
parserState.NewToken = IndentationToken(token)
parserState.NewBlock = IndentationBlock(parserState.LastBlock,
parserState.NewToken)
return
elif isinstance(token, StringToken):
keyword = token.Value.lower()
if (keyword == "generic"):
newToken = GenericKeyword(token)
parserState.PushState = GenericList.OpenBlock.stateGenericKeyword
elif (keyword == "port"):
newToken = PortKeyword(token)
parserState.PushState = PortList.OpenBlock.statePortKeyword
elif (keyword == "end"):
newToken = EndKeyword(token)
parserState.NextState = EndGenerateBlock.stateEndKeyword
elif (keyword == "begin"):
parserState.NewToken = BeginKeyword(token)
parserState.NewBlock = ElseGenerateBeginBlock(
parserState.LastBlock, parserState.NewToken)
parserState.NextState = ElseGenerateBeginBlock.stateBeginKeyword
return
else:
raise TokenParserException(errorMessage, token)
parserState.NewToken = newToken
parserState.TokenMarker = newToken
return
raise TokenParserException(errorMessage, token)
def stateAfterSensitivityList(cls, parserState: ParserState):
token = parserState.Token
if isinstance(token, StringToken):
tokenValue = token.Value.lower()
for keyword in OpenBlock2.KEYWORDS:
if (tokenValue == keyword.__KEYWORD__):
newToken = keyword(token)
parserState.NextState = DeclarativeRegion.stateDeclarativeRegion
parserState.PushState = OpenBlock2.KEYWORDS[keyword]
parserState.NewToken = newToken
parserState.TokenMarker = newToken
return
if (tokenValue == "begin"):
parserState.NewToken = BeginKeyword(token)
parserState.NewBlock = BeginBlock(parserState.LastBlock,
parserState.NewToken)
parserState.TokenMarker = None
parserState.NextState = BeginBlock.stateSequentialRegion
return
elif (tokenValue == "is"):
parserState.NewToken = IsKeyword(token)
parserState.NewBlock = cls(parserState.LastBlock,
parserState.TokenMarker,
parserState.NewToken)
parserState.TokenMarker = None
parserState.NextState = DeclarativeRegion.stateDeclarativeRegion
return
elif isinstance(token, SpaceToken):
parserState.NewToken = BoundaryToken(token)
parserState.TokenMarker = parserState.NewToken
parserState.NextState = cls.stateWhitespace1
return
elif isinstance(token, (LinebreakToken, CommentToken)):
block = LinebreakBlock if isinstance(
token, LinebreakToken) else CommentBlock
parserState.NewBlock = block(parserState.LastBlock, token)
parserState.TokenMarker = None
parserState.NextState = cls.stateWhitespace1
return
raise TokenParserException("Expected whitespace after keyword ENTITY.",
token)
def stateDeclarativeRegion(cls, parserState: ParserState):
token = parserState.Token
if isinstance(token, SpaceToken):
blockType = IndentationBlock if isinstance(token, IndentationToken) else WhitespaceBlock
parserState.NewBlock = blockType(parserState.LastBlock, token)
parserState.TokenMarker = None
return
elif isinstance(token, LinebreakToken):
parserState.NewBlock = LinebreakBlock(parserState.LastBlock, token)
parserState.TokenMarker = None
return
elif isinstance(token, CommentToken):
parserState.NewBlock = CommentBlock(parserState.LastBlock, token)
parserState.TokenMarker = None
return
elif isinstance(token, WordToken):
tokenValue = token.Value.lower()
for keyword in cls.KEYWORDS:
if (tokenValue == keyword.__KEYWORD__):
newToken = keyword(token)
parserState.PushState = cls.KEYWORDS[keyword]
parserState.NewToken = newToken
parserState.TokenMarker = newToken
return
if (tokenValue == "begin"):
parserState.NewToken = BeginKeyword(token)
parserState.NewBlock = cls.BEGIN_BLOCK(parserState.LastBlock, parserState.NewToken)
parserState.NextState = cls.BEGIN_BLOCK.stateStatementRegion
return
elif (tokenValue == "end"):
parserState.NewToken = EndKeyword(token)
parserState.NextState = cls.END_BLOCK.stateEndKeyword
return
raise BlockParserException(
"Expected one of these keywords: BEGIN, END, {keywords}. Found: '{tokenValue}'.".format(
keywords=", ".join(
[kw.__KEYWORD__.upper() for kw in cls.KEYWORDS]
),
tokenValue=token.Value
), token)
def stateWhitespace1(cls, parserState: ParserState):
token = parserState.Token
if (isinstance(token, CharacterToken) and (token == "(")):
parserState.NewToken = BoundaryToken(token)
parserState.NewBlock = cls(parserState.LastBlock,
parserState.TokenMarker,
endToken=parserState.NewToken)
parserState.NextState = OpenBlock2.stateAfterSensitivityList
parserState.PushState = SensitivityList.OpenBlock.stateOpeningParenthesis
parserState.Counter = 1
return
elif isinstance(token, LinebreakToken):
if (not (isinstance(parserState.LastBlock, CommentBlock)
and isinstance(parserState.LastBlock.StartToken,
MultiLineCommentToken))):
parserState.NewBlock = cls(parserState.LastBlock,
parserState.TokenMarker,
endToken=token.PreviousToken,
multiPart=True)
_ = LinebreakBlock(parserState.NewBlock, token)
else:
parserState.NewBlock = LinebreakBlock(parserState.LastBlock,
token)
parserState.TokenMarker = None
return
elif isinstance(token, CommentToken):
parserState.NewBlock = CommentBlock(parserState.LastBlock, token)
parserState.TokenMarker = None
return
elif (isinstance(token, IndentationToken)
and isinstance(token.PreviousToken,
(LinebreakToken, SingleLineCommentToken))):
return
elif (isinstance(token, SpaceToken) and
(isinstance(parserState.LastBlock, CommentBlock) and isinstance(
parserState.LastBlock.StartToken, MultiLineCommentToken))):
parserState.NewToken = BoundaryToken(token)
parserState.NewBlock = WhitespaceBlock(parserState.LastBlock,
parserState.NewToken)
parserState.TokenMarker = None
return
elif isinstance(token, StringToken):
tokenValue = token.Value.lower()
parserState.NewBlock = cls(parserState.LastBlock,
parserState.TokenMarker,
endToken=token.PreviousToken)
for keyword in OpenBlock2.KEYWORDS:
if (tokenValue == keyword.__KEYWORD__):
newToken = keyword(token)
parserState.NextState = DeclarativeRegion.stateDeclarativeRegion
parserState.PushState = cls.KEYWORDS[keyword]
parserState.NewToken = newToken
parserState.TokenMarker = newToken
return
if (tokenValue == "begin"):
parserState.NewToken = BeginKeyword(token)
_ = BeginBlock(parserState.NewBlock, parserState.NewToken)
parserState.TokenMarker = None
parserState.NextState = BeginBlock.stateSequentialRegion
return
raise TokenParserException("Expected '(' after keyword PROCESS.",
token)
def stateWhitespace1(cls, parserState: ParserState):
token = parserState.Token
if isinstance(token, WordToken):
tokenValue = token.Value.lower()
for keyword in cls.KEYWORDS:
if (tokenValue == keyword.__KEYWORD__):
newToken = keyword(token)
parserState.NextState = DeclarativeRegion.stateDeclarativeRegion
parserState.PushState = cls.KEYWORDS[keyword]
parserState.NewToken = newToken
parserState.TokenMarker = newToken
return
if (tokenValue == "begin"):
parserState.NewToken = BeginKeyword(token)
parserState.NewBlock = BeginBlock(parserState.LastBlock,
parserState.NewToken)
parserState.TokenMarker = None
parserState.NextState = BeginBlock.stateSequentialRegion
return
elif (tokenValue == "is"):
parserState.NewToken = IsKeyword(token)
parserState.NewBlock = cls(parserState.LastBlock,
parserState.TokenMarker,
parserState.NewToken)
parserState.TokenMarker = None
parserState.NextState = DeclarativeRegion.stateDeclarativeRegion
return
elif isinstance(token, LinebreakToken):
if (not (isinstance(parserState.LastBlock, CommentBlock)
and isinstance(parserState.LastBlock.StartToken,
MultiLineCommentToken))):
parserState.NewBlock = cls(parserState.LastBlock,
parserState.TokenMarker,
endToken=token.PreviousToken,
multiPart=True)
_ = LinebreakBlock(parserState.NewBlock, token)
else:
parserState.NewBlock = LinebreakBlock(parserState.LastBlock,
token)
parserState.TokenMarker = None
return
elif isinstance(token, CommentToken):
parserState.NewBlock = cls(parserState.LastBlock,
parserState.TokenMarker,
endToken=token.PreviousToken,
multiPart=True)
_ = CommentBlock(parserState.NewBlock, token)
parserState.TokenMarker = None
return
elif (isinstance(token, IndentationToken)
and isinstance(token.PreviousToken,
(LinebreakToken, SingleLineCommentToken))):
return
elif (isinstance(token, SpaceToken) and
(isinstance(parserState.LastBlock, CommentBlock) and isinstance(
parserState.LastBlock.StartToken, MultiLineCommentToken))):
parserState.NewToken = BoundaryToken(token)
parserState.NewBlock = WhitespaceBlock(parserState.LastBlock,
parserState.NewToken)
parserState.TokenMarker = None
return
raise BlockParserException(
"Expected declarations or keyword IS after sensitivity list.",
token)