Package org.antlr.v4.codegen.target

Class JavaScriptTarget

  • public class JavaScriptTarget
extends Target
    Author:
    Eric Vergnaud

    • 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

      • 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

      • loadTemplates

        protected org.stringtemplate.v4.STGroup loadTemplates()
        Overrides:
        loadTemplates in class Target