Package org.jparsec

Class Terminals.Builder

  • Enclosing class:
    Terminals
    public final class Terminals.Builder
extends java.lang.Object
    Builds Terminals instance by defining the words and keywords recognized. The following example implements a calculator with logical operators: 
       
   Terminals terms = Terminals
       .operators("<", ">", "=", ">=", "<=")
       .words(Scanners.IDENTIFIER)
       .caseInsensitiveKeywords("and", "or")
       .build();
   Parser<String> var = Terminals.identifier();
   Parser<Integer> integer = Terminals.IntegerLiteral.PARSER.map(...);
   Parser<?> and = terms.token("and");
   Parser<?> lessThan = terms.token("<");
   ...
   Parser<?> parser = grammar.from(
       terms.tokenizer().or(IntegerLiteral.TOKENIZER), Scanners.WHITSPACES.optional());
    Since:
    2.2

    • Field Detail

      • wordScanner

        private final Parser<java.lang.String> wordScanner

      • keywords

        private java.util.Collection<java.lang.String> keywords

      • wordTokenMap

        private java.util.function.Function<java.lang.String,​?> wordTokenMap

    • Constructor Detail

      • Builder

        Builder​(Parser<java.lang.String> wordScanner)

    • Method Detail

      • caseInsensitiveKeywords

        public Terminals.Builder caseInsensitiveKeywords​(java.lang.String... keywords)
        Defines case insensitive keywords. Keywords are special words with their own grammar rules. To get the parser for a keyword, call token(keyword).

        Note that if you call keywords or caseInsensitiveKeywords(java.lang.String...) multiple times on the same Terminals.Builder instance, the last call overwrites previous calls.

      • caseInsensitiveKeywords

        public Terminals.Builder caseInsensitiveKeywords​(java.util.Collection<java.lang.String> keywords)
        Defines case insensitive keywords. Keywords are special words with their own grammar rules. To get the parser for a keyword, call token(keyword).

        Note that if you call keywords or caseInsensitiveKeywords(java.lang.String...) multiple times on the same Terminals.Builder instance, the last call overwrites previous calls.

      • tokenizeWordsWith

        public Terminals.Builder tokenizeWordsWith​(java.util.function.Function<java.lang.String,​?> wordMap)
        Configures alternative tokenization strategy for words (except keywords).

      • build

        public Terminals build()
        Builds a new Terminals instance that recognizes words defined in this builder.