153 lines
3.4 KiB
ANTLR
153 lines
3.4 KiB
ANTLR
grammar InkBlotAntlrGrammar;
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import InkBlotAntlrLexer;
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/*
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* STORY
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*/
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story: topLevelStatements ;
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/*
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* STATEMENTS FOR THE VARIOUS LEVELS
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*/
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topLevelStatements:
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topLevelStatement+
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;
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topLevelStatement:
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contentText
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| multiDivert
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;
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knotLevelStatements:
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(contentText
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| multiDivert
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)+
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;
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stitchLevelStatements:
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(contentText
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| multiDivert
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)+
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;
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innerBlockLevelStatements:
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(contentText
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| multiDivert
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)+
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;
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/*
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* STATEMENTS
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*/
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contentText: CONTENT_TEXT_NO_ESCAPE_SIMPLE ;
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mixedTextAndLogic:
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// TODO: ~ is not allowed as first symbol of this (see InkParser_Content => MixedTextAndLog), let's implement it in the C# side?
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// like in innerInlineSequenceObjects, a bit of a chaos to avoid having completely empty entries
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contentText? (inlineLogicOrGlueOrTagStart? contentText | inlineLogicOrGlueOrTagStart contentText?)+
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// TODO: this is valid only when not parsing a choice, see above for the code where this logic is implemented
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multiDivert
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// TODO: management of tag ftw O_O
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;
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inlineLogicOrGlueOrTagStart:
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inlineLogic
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// TODO: glue, tag start
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;
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inlineLogic:
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INLINE_LOGIC_START
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WS?
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innerLogic
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// TODO: += and -= are disabled here (don't know why)
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WS?
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INLINE_LOGIC_END
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// TODO: tags ftw
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;
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innerLogic:
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WS?
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sequenceTypeAnnotation innerSequenceObjects
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// TODO: the rest of InkParser_Logic => InnerLogic
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;
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multiDivert:
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WS?
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(
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THREAD_ARROW divertIdentifierWithArguments
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// here be dragons: trying to express the various "Possible patterns" of InkParser_Divert => MultiDivert
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| (DIVERT_ARROW divertIdentifierWithArguments)+ TUNNEL_ARROW divertIdentifierWithArguments
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| (DIVERT_ARROW divertIdentifierWithArguments)+ TUNNEL_ARROW
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| (DIVERT_ARROW divertIdentifierWithArguments)+ DIVERT_ARROW
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| TUNNEL_ARROW
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| DIVERT_ARROW // TODO: this is only valid in default choices ( https://github.com/inkle/ink/blob/master/Documentation/WritingWithInk.md#fallback-choices )
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)
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;
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divertIdentifierWithArguments:
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WS? identifier WS? ('.' WS? identifier WS? )*
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WS?
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(
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'('
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expression (',' expression)*
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')'
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)?
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WS?
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;
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identifier:
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// TODO: reject numbers-only identifier - see InkParser_Logic => Identifier
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IDENTIFIER
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;
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expression:
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// TODO: temporary stuff here
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IDENTIFIER
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;
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// all possible symbols or word(s) for sequencing
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sequenceTypeAnnotation:
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op=SEQUENCE_TYPE_SYMBOL_ANNOTATION
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| ONCE
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| CYCLE
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| SHUFFLE
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| STOPPING
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| SHUFFLE_ONCE
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| SHUFFLE_STOPPING
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;
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/* a list of sequence objects, either compressed in a single line (e.g.: {a|b|c}) or expanded in multiple lines (e.g.:
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{\n- a\n- b\n- c}
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*/
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innerSequenceObjects:
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NL innerMultilineSequenceObjects
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| innerInlineSequenceObjects
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;
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innerMultilineSequenceObjects:
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singleMultilineSequenceElement+
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;
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singleMultilineSequenceElement:
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WS?
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/* TODO: how to express this? and why is it here? InkParser_Sequences => SingleMultilineSequenceElement
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if (ParseString ("->") != null)
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return null;
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*/
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'-'
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WS?
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(
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innerBlockLevelStatements
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| MULTILINE_WS
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)
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;
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innerInlineSequenceObjects:
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// it's a bit chaotic, in order to allow for empty mixedTextAndLogic, but always require at least one entry
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(mixedTextAndLogic ('|' mixedTextAndLogic?)*)
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| ('|' mixedTextAndLogic?)+
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; |