org.antlr.v4.codegen.target

Class JavaScriptTarget

java.lang.Object

org.antlr.v4.codegen.Target

org.antlr.v4.codegen.target.JavaScriptTarget

public class JavaScriptTarget
extends Target

Author:

Eric Vergnaud

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	JavaScriptTarget.JavaStringRenderer

Field Summary

Fields

Modifier and Type	Field and Description
protected Set<String>	badWords Avoid grammar symbols in this set to prevent conflicts in gen'd code.
protected static String[]	javaScriptKeywords Source: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Lexical_grammar

Fields inherited from class org.antlr.v4.codegen.Target

targetCharValueEscape

Constructor Summary

Constructors

Constructor and Description
JavaScriptTarget(CodeGenerator gen)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	addBadWords()
String	encodeIntAsCharEscape(int v) Assume 16-bit char
Set<String>	getBadWords()
int	getInlineTestSetWordSize() How many bits should be used to do inline token type tests? Java assumes a 64-bit word for bitsets.
int	getSerializedATNSegmentLimit() Gets the maximum number of 16-bit unsigned integers that can be encoded in a single segment of the serialized ATN.
String	getTargetStringLiteralFromANTLRStringLiteral(CodeGenerator generator, String literal, boolean addQuotes) Convert from an ANTLR string literal found in a grammar file to an equivalent string literal in the target language.
String	getVersion() ANTLR tool should check output templates / target are compatible with tool code generation.
protected org.stringtemplate.v4.STGroup	loadTemplates()
boolean	supportsOverloadedMethods()
protected boolean	visibleGrammarSymbolCausesIssueInGeneratedCode(GrammarAST idNode)
boolean	wantsBaseListener()
boolean	wantsBaseVisitor()

Methods inherited from class org.antlr.v4.codegen.Target

genFile, genListenerFile, genRecognizerHeaderFile, getAltLabelContextStructName, getCodeGenerator, getElementListName, getElementName, getImplicitRuleLabel, getImplicitSetLabel, getImplicitTokenLabel, getLanguage, getListLabel, getLoopCounter, getLoopLabel, getRuleFunctionContextStructName, getRuleFunctionContextStructName, getTargetStringLiteralFromString, getTargetStringLiteralFromString, getTemplates, getTokenTypeAsTargetLabel, getTokenTypesAsTargetLabels, grammarSymbolCausesIssueInGeneratedCode, templatesExist

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

javaScriptKeywords

protected static final String[] javaScriptKeywords

Source: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Lexical_grammar

badWords

protected final Set<String> badWords

Avoid grammar symbols in this set to prevent conflicts in gen'd code.

Constructor Detail

JavaScriptTarget

public JavaScriptTarget(CodeGenerator gen)

Method Detail

getVersion

public String getVersion()

Description copied from class: Target

ANTLR tool should check output templates / target are compatible with tool code generation. For now, a simple string match used on x.y of x.y.z scheme. We use a method to avoid mismatches between a template called VERSION. This value is checked against Tool.VERSION during load of templates. This additional method forces all targets 4.3 and beyond to add this method.

Specified by:

getVersion in class Target

getBadWords

public Set<String> getBadWords()

addBadWords

protected void addBadWords()

getTargetStringLiteralFromANTLRStringLiteral

public String getTargetStringLiteralFromANTLRStringLiteral(CodeGenerator generator,
                                                  String literal,
                                                  boolean addQuotes)

Convert from an ANTLR string literal found in a grammar file to an equivalent string literal in the target language.

For Java, this is the translation 'a\n"' → "a\n\"". Expect single quotes around the incoming literal. Just flip the quotes and replace double quotes with \".

Note that we have decided to allow people to use '\"' without penalty, so we must build the target string in a loop as String.replace(char, char) cannot handle both \" and " without a lot of messing around.

For Java, this is the translation 'a\n"' → "a\n\"". Expect single quotes around the incoming literal. Just flip the quotes and replace double quotes with \".

Note that we have decided to allow people to use '\"' without penalty, so we must build the target string in a loop as String.replace(char, char) cannot handle both \" and " without a lot of messing around.

Overrides:

getTargetStringLiteralFromANTLRStringLiteral in class Target

encodeIntAsCharEscape

public String encodeIntAsCharEscape(int v)

Description copied from class: Target

Assume 16-bit char

Overrides:

encodeIntAsCharEscape in class Target

getSerializedATNSegmentLimit

public int getSerializedATNSegmentLimit()

Description copied from class: Target

Gets the maximum number of 16-bit unsigned integers that can be encoded in a single segment of the serialized ATN.

Overrides:

getSerializedATNSegmentLimit in class Target

Returns:

the serialized ATN segment limit

See Also:

SerializedATN.getSegments()

getInlineTestSetWordSize

public int getInlineTestSetWordSize()

Description copied from class: Target

How many bits should be used to do inline token type tests? Java assumes a 64-bit word for bitsets. Must be a valid wordsize for your target like 8, 16, 32, 64, etc...

Overrides:

getInlineTestSetWordSize in class Target

visibleGrammarSymbolCausesIssueInGeneratedCode

protected boolean visibleGrammarSymbolCausesIssueInGeneratedCode(GrammarAST idNode)

Specified by:

visibleGrammarSymbolCausesIssueInGeneratedCode in class Target

loadTemplates

protected org.stringtemplate.v4.STGroup loadTemplates()

Overrides:

loadTemplates in class Target

wantsBaseListener

public boolean wantsBaseListener()

Overrides:

wantsBaseListener in class Target

wantsBaseVisitor

public boolean wantsBaseVisitor()

Overrides:

wantsBaseVisitor in class Target

supportsOverloadedMethods

public boolean supportsOverloadedMethods()

Overrides:

supportsOverloadedMethods in class Target