Simplified some Emitter code.
This commit is contained in:
kiith-sa
parent
58fc17197b
commit
19d88d156a
175
dyaml/emitter.d
175
dyaml/emitter.d
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@ -100,14 +100,20 @@ struct Emitter
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///Level of nesting in flow context. If 0, we're in block context.
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uint flowLevel_ = 0;
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///Are we in the root node of a document?
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bool rootContext_;
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///Are we in a sequence?
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bool sequenceContext_;
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///Are we in a mapping?
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bool mappingContext_;
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///Are we in a simple key?
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bool simpleKeyContext_;
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/// Describes context (where we are in the document).
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enum Context
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{
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/// Root node of a document.
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Root,
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/// Sequence.
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Sequence,
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/// Mapping.
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MappingNoSimpleKey,
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/// Mapping, in a simple key.
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MappingSimpleKey
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}
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/// Current context.
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Context context_;
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///Characteristics of the last emitted character:
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@ -159,8 +165,8 @@ struct Emitter
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* indent = Indentation width.
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* lineBreak = Line break character/s.
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*/
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this(Stream stream, in bool canonical, in int indent, in int width,
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in LineBreak lineBreak) @trusted nothrow
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this(Stream stream, const bool canonical, const int indent, const int width,
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const LineBreak lineBreak) @trusted nothrow
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in{assert(stream.writeable, "Can't emit YAML to a non-writable stream");}
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body
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{
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@ -291,7 +297,7 @@ struct Emitter
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}
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///Increase indentation level.
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void increaseIndent(in bool flow = false, in bool indentless = false) @trusted
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void increaseIndent(const Flag!"flow" flow = No.flow, const bool indentless = false) @trusted
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{
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indents_ ~= indent_;
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if(indent_ == -1)
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@ -350,7 +356,7 @@ struct Emitter
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auto tagDirectives = event_.tagDirectives;
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if(openEnded_ && (YAMLVersion !is null || tagDirectives !is null))
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{
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writeIndicator("...", true);
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writeIndicator("...", Yes.needWhitespace);
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writeIndent();
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}
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@ -387,16 +393,16 @@ struct Emitter
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if(!implicit)
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{
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writeIndent();
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writeIndicator("---", true);
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writeIndicator("---", Yes.needWhitespace);
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if(canonical_){writeIndent();}
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}
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state_ = &expectDocumentRoot;
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state_ = &expectRootNode;
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}
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else if(event_.id == EventID.StreamEnd)
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{
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if(openEnded_)
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{
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writeIndicator("...", true);
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writeIndicator("...", Yes.needWhitespace);
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writeIndent();
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}
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writeStreamEnd();
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@ -413,7 +419,7 @@ struct Emitter
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writeIndent();
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if(event_.explicitDocument)
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{
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writeIndicator("...", true);
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writeIndicator("...", Yes.needWhitespace);
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writeIndent();
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}
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stream_.flush();
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@ -421,20 +427,30 @@ struct Emitter
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}
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///Handle the root node of a document.
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void expectDocumentRoot() @trusted
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void expectRootNode() @trusted
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{
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states_ ~= &expectDocumentEnd;
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expectNode(true);
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expectNode(Context.Root);
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}
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///Handle a new node. Parameters determine context.
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void expectNode(in bool root = false, in bool sequence = false,
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in bool mapping = false, in bool simpleKey = false) @trusted
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///Handle a mapping node.
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//
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//Params: simpleKey = Are we in a simple key?
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void expectMappingNode(const bool simpleKey = false)
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{
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rootContext_ = root;
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sequenceContext_ = sequence;
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mappingContext_ = mapping;
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simpleKeyContext_ = simpleKey;
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expectNode(simpleKey ? Context.MappingSimpleKey : Context.MappingNoSimpleKey);
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}
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///Handle a sequence node.
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void expectSequenceNode()
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{
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expectNode(Context.Sequence);
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}
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///Handle a new node. Context specifies where in the document we are.
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void expectNode(const Context context) @trusted
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{
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context_ = context;
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const flowCollection = event_.collectionStyle == CollectionStyle.Flow;
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@ -475,7 +491,6 @@ struct Emitter
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"MappingStart, but got: " ~ event_.idString);
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}
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}
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///Handle an alias.
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void expectAlias() @trusted
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{
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@ -487,7 +502,7 @@ struct Emitter
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///Handle a scalar.
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void expectScalar() @trusted
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{
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increaseIndent(true);
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increaseIndent(Yes.flow);
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processScalar();
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indent_ = popIndent();
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state_ = popState();
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@ -498,9 +513,9 @@ struct Emitter
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///Handle a flow sequence.
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void expectFlowSequence() @trusted
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{
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writeIndicator("[", true, true);
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writeIndicator("[", Yes.needWhitespace, Yes.whitespace);
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++flowLevel_;
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increaseIndent(true);
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increaseIndent(Yes.flow);
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state_ = &expectFlowSequenceItem!true;
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}
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@ -513,17 +528,17 @@ struct Emitter
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--flowLevel_;
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static if(!first) if(canonical_)
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{
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writeIndicator(",", false);
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writeIndicator(",", No.needWhitespace);
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writeIndent();
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}
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writeIndicator("]", false);
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writeIndicator("]", No.needWhitespace);
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state_ = popState();
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return;
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}
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static if(!first){writeIndicator(",", false);}
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static if(!first){writeIndicator(",", No.needWhitespace);}
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if(canonical_ || column_ > bestWidth_){writeIndent();}
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states_ ~= &expectFlowSequenceItem!false;
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expectNode(false, true);
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expectSequenceNode();
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}
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//Flow mapping handlers.
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@ -531,9 +546,9 @@ struct Emitter
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///Handle a flow mapping.
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void expectFlowMapping() @trusted
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{
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writeIndicator("{", true, true);
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writeIndicator("{", Yes.needWhitespace, Yes.whitespace);
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++flowLevel_;
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increaseIndent(true);
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increaseIndent(Yes.flow);
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state_ = &expectFlowMappingKey!true;
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}
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@ -546,43 +561,43 @@ struct Emitter
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--flowLevel_;
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static if (!first) if(canonical_)
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{
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writeIndicator(",", false);
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writeIndicator(",", No.needWhitespace);
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writeIndent();
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}
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writeIndicator("}", false);
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writeIndicator("}", No.needWhitespace);
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state_ = popState();
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return;
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}
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static if(!first){writeIndicator(",", false);}
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static if(!first){writeIndicator(",", No.needWhitespace);}
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if(canonical_ || column_ > bestWidth_){writeIndent();}
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if(!canonical_ && checkSimpleKey())
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{
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states_ ~= &expectFlowMappingSimpleValue;
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expectNode(false, false, true, true);
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expectMappingNode(true);
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return;
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}
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writeIndicator("?", true);
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writeIndicator("?", Yes.needWhitespace);
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states_ ~= &expectFlowMappingValue;
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expectNode(false, false, true);
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expectMappingNode();
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}
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///Handle a simple value in a flow mapping.
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void expectFlowMappingSimpleValue() @trusted
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{
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writeIndicator(":", false);
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writeIndicator(":", No.needWhitespace);
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states_ ~= &expectFlowMappingKey!false;
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expectNode(false, false, true);
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expectMappingNode();
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}
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///Handle a complex value in a flow mapping.
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void expectFlowMappingValue() @trusted
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{
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if(canonical_ || column_ > bestWidth_){writeIndent();}
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writeIndicator(":", true);
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writeIndicator(":", Yes.needWhitespace);
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states_ ~= &expectFlowMappingKey!false;
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expectNode(false, false, true);
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expectMappingNode();
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}
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//Block sequence handlers.
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@ -590,8 +605,9 @@ struct Emitter
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///Handle a block sequence.
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void expectBlockSequence() @safe
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{
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const indentless = mappingContext_ && !indentation_;
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increaseIndent(false, indentless);
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const indentless = (context_ == Context.MappingNoSimpleKey ||
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context_ == Context.MappingSimpleKey) && !indentation_;
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increaseIndent(No.flow, indentless);
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state_ = &expectBlockSequenceItem!true;
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}
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@ -606,9 +622,9 @@ struct Emitter
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}
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writeIndent();
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writeIndicator("-", true, false, true);
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writeIndicator("-", Yes.needWhitespace, No.whitespace, Yes.indentation);
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states_ ~= &expectBlockSequenceItem!false;
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expectNode(false, true);
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expectSequenceNode();
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}
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//Block mapping handlers.
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@ -616,7 +632,7 @@ struct Emitter
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///Handle a block mapping.
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void expectBlockMapping() @safe
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{
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increaseIndent(false);
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increaseIndent(No.flow);
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state_ = &expectBlockMappingKey!true;
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}
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@ -634,30 +650,30 @@ struct Emitter
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if(checkSimpleKey())
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{
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states_ ~= &expectBlockMappingSimpleValue;
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expectNode(false, false, true, true);
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expectMappingNode(true);
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return;
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}
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writeIndicator("?", true, false, true);
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writeIndicator("?", Yes.needWhitespace, No.whitespace, Yes.indentation);
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states_ ~= &expectBlockMappingValue;
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expectNode(false, false, true);
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expectMappingNode();
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}
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///Handle a simple value in a block mapping.
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void expectBlockMappingSimpleValue() @trusted
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{
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writeIndicator(":", false);
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writeIndicator(":", No.needWhitespace);
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states_ ~= &expectBlockMappingKey!false;
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expectNode(false, false, true);
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expectMappingNode();
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}
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///Handle a complex value in a block mapping.
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void expectBlockMappingValue() @trusted
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{
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writeIndent();
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writeIndicator(":", true, false, true);
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writeIndicator(":", Yes.needWhitespace, No.whitespace, Yes.indentation);
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states_ ~= &expectBlockMappingKey!false;
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expectNode(false, false, true);
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expectMappingNode();
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}
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//Checkers.
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@ -738,13 +754,14 @@ struct Emitter
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style_ = chooseScalarStyle();
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}
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//if(analysis_.flags.multiline && !simpleKeyContext_ &&
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//if(analysis_.flags.multiline && (context_ != Context.MappingSimpleKey) &&
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// ([ScalarStyle.Invalid, ScalarStyle.Plain, ScalarStyle.SingleQuoted, ScalarStyle.DoubleQuoted)
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// .canFind(style_))
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//{
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// writeIndent();
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//}
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auto writer = ScalarWriter(this, analysis_.scalar, !simpleKeyContext_);
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auto writer = ScalarWriter(this, analysis_.scalar,
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context_ != Context.MappingSimpleKey);
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with(writer) final switch(style_)
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{
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case ScalarStyle.Invalid: assert(false);
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@ -772,7 +789,7 @@ struct Emitter
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}
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if(preparedAnchor_ !is null && preparedAnchor_ != "")
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{
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writeIndicator(indicator, true);
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writeIndicator(indicator, Yes.needWhitespace);
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writeString(preparedAnchor_);
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}
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preparedAnchor_ = null;
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@ -808,7 +825,7 @@ struct Emitter
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if(preparedTag_ is null){preparedTag_ = prepareTag(tag);}
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if(preparedTag_ !is null && preparedTag_ != "")
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{
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writeIndicator(preparedTag_, true);
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writeIndicator(preparedTag_, Yes.needWhitespace);
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}
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preparedTag_ = null;
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}
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@ -827,7 +844,7 @@ struct Emitter
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const allowPlain = flowLevel_ > 0 ? analysis_.flags.allowFlowPlain
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: analysis_.flags.allowBlockPlain;
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//simple empty or multiline scalars can't be written in plain style
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const simpleNonPlain = simpleKeyContext_ &&
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const simpleNonPlain = (context_ == Context.MappingSimpleKey) &&
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(analysis_.flags.empty || analysis_.flags.multiline);
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if(doubleQuoted || canonical_)
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@ -840,7 +857,7 @@ struct Emitter
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return ScalarStyle.Plain;
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}
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if(block && flowLevel_ == 0 && !simpleKeyContext_ &&
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if(block && flowLevel_ == 0 && context_ != Context.MappingSimpleKey &&
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analysis_.flags.allowBlock)
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{
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return style;
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@ -848,7 +865,7 @@ struct Emitter
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if((invalidOrPlain || singleQuoted) &&
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analysis_.flags.allowSingleQuoted &&
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!(simpleKeyContext_ && analysis_.flags.multiline))
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!(context_ == Context.MappingSimpleKey && analysis_.flags.multiline))
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{
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return ScalarStyle.SingleQuoted;
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}
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@ -970,7 +987,7 @@ struct Emitter
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}
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///Prepare anchor for output.
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static string prepareAnchor(in Anchor anchor) @trusted
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static string prepareAnchor(const Anchor anchor) @trusted
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{
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enforce(!anchor.isNull() && anchor.get != "",
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new Error("Anchor must not be empty"));
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@ -1179,8 +1196,10 @@ struct Emitter
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void writeStreamEnd() @system {stream_.flush();}
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///Write an indicator (e.g. ":", "[", ">", etc.).
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void writeIndicator(const string indicator, in bool needWhitespace,
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in bool whitespace = false, in bool indentation = false) @system
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void writeIndicator(const string indicator,
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const Flag!"needWhitespace" needWhitespace,
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const Flag!"whitespace" whitespace = No.whitespace,
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const Flag!"indentation" indentation = No.indentation) @system
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{
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const bool prefixSpace = !whitespace_ && needWhitespace;
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whitespace_ = whitespace;
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@ -1290,7 +1309,7 @@ struct ScalarWriter
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public:
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///Construct a ScalarWriter using emitter to output text.
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this(ref Emitter emitter, string text, in bool split = true) @trusted nothrow
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this(ref Emitter emitter, string text, const bool split = true) @trusted nothrow
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{
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emitter_ = &emitter;
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text_ = text;
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@ -1306,7 +1325,7 @@ struct ScalarWriter
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///Write text as single quoted scalar.
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void writeSingleQuoted() @system
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{
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emitter_.writeIndicator("\'", true);
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emitter_.writeIndicator("\'", Yes.needWhitespace);
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spaces_ = breaks_ = false;
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resetTextPosition();
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@ -1350,14 +1369,14 @@ struct ScalarWriter
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updateBreaks(c, Flag!"UpdateSpaces".yes);
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}while(endByte_ < text_.length);
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emitter_.writeIndicator("\'", false);
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emitter_.writeIndicator("\'", No.needWhitespace);
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}
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///Write text as double quoted scalar.
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void writeDoubleQuoted() @system
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{
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resetTextPosition();
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emitter_.writeIndicator("\"", true);
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emitter_.writeIndicator("\"", Yes.needWhitespace);
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do
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{
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const dchar c = nextChar();
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@ -1412,7 +1431,7 @@ struct ScalarWriter
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}
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}
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}while(endByte_ < text_.length);
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emitter_.writeIndicator("\"", false);
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emitter_.writeIndicator("\"", No.needWhitespace);
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}
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///Write text as folded block scalar.
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@ -1491,7 +1510,7 @@ struct ScalarWriter
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///Write text as plain scalar.
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void writePlain() @system
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{
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if(emitter_.rootContext_){emitter_.openEnded_ = true;}
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if(emitter_.context_ == Emitter.Context.Root){emitter_.openEnded_ = true;}
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if(text_ == ""){return;}
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if(!emitter_.whitespace_)
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{
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@ -1597,12 +1616,12 @@ struct ScalarWriter
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}
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///Initialize for block scalar writing with specified indicator.
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void initBlock(in char indicator) @system
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void initBlock(const char indicator) @system
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{
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char[4] hints;
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hints[0] = indicator;
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const hintsLength = 1 + determineBlockHints(hints[1 .. $], emitter_.bestIndent_);
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emitter_.writeIndicator(cast(string)hints[0 .. hintsLength], true);
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emitter_.writeIndicator(cast(string)hints[0 .. hintsLength], Yes.needWhitespace);
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if(hints.length > 0 && hints[$ - 1] == '+')
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{
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emitter_.openEnded_ = true;
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@ -1611,7 +1630,7 @@ struct ScalarWriter
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}
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///Write out the current text range.
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void writeCurrentRange(in Flag!"UpdateColumn" updateColumn) @system
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void writeCurrentRange(const Flag!"UpdateColumn" updateColumn) @system
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{
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emitter_.writeString(text_[startByte_ .. endByte_]);
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if(updateColumn){emitter_.column_ += endChar_ - startChar_;}
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@ -1641,7 +1660,7 @@ struct ScalarWriter
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}
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///Write indentation, optionally resetting whitespace/indentation flags.
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void writeIndent(in Flag!"ResetSpace" resetSpace) @system
|
||||
void writeIndent(const Flag!"ResetSpace" resetSpace) @system
|
||||
{
|
||||
emitter_.writeIndent();
|
||||
if(resetSpace)
|
||||
|
|
@ -1658,7 +1677,7 @@ struct ScalarWriter
|
|||
}
|
||||
|
||||
///Update the line breaks_ flag, optionally updating the spaces_ flag.
|
||||
void updateBreaks(in dchar c, in Flag!"UpdateSpaces" updateSpaces) pure @trusted
|
||||
void updateBreaks(in dchar c, const Flag!"UpdateSpaces" updateSpaces) pure @trusted
|
||||
{
|
||||
if(c == dcharNone){return;}
|
||||
breaks_ = newlineSearch_.canFind(c);
|
||||
|
|
|
|||
Loading…
Reference in a new issue