Package org.javacc.cpp

Class ParserCodeGenerator

java.lang.Object
org.javacc.cpp.ParserCodeGenerator
All Implemented Interfaces:
org.javacc.parser.ParserCodeGenerator
class ParserCodeGenerator extends Object implements org.javacc.parser.ParserCodeGenerator
Generate the parser.

  • Field Details

    • context

      private final org.javacc.parser.Context context
      These lists are used to maintain expansions for which code generation in phase 2 and phase 3 is required. Whenever a call is generated to a phase 2 or phase 3 routine, a corresponding entry is added here if it has not already been added. The phase 3 routines have been optimized in version 0.7pre2. Essentially only those methods (and only those portions of these methods) are generated that are required. The lookahead amount is used to determine this. This change requires the use of a hash table because it is now possible for the same phase 3 routine to be requested multiple times with different lookaheads. The hash table provides a easily searchable capability to determine the previous requests. The phase 3 routines now are performed in a two step process - the first step gathers the requests (replacing requests with lower lookaheads with those requiring larger lookaheads). The second step then generates these methods. This optimization and the hashtable makes it look like we do not need the flag "phase3done" any more. But this has not been removed yet.

    • codeGenerator

      private CppCodeBuilder codeGenerator

    • internalNames

      private final Map<org.javacc.parser.Expansion,String> internalNames

    • internalIndexes

      private final Map<org.javacc.parser.Expansion,Integer> internalIndexes

    • gensymindex

      private int gensymindex

    • indentamt

      private int indentamt

    • jj2LA

      private boolean jj2LA

    • phase2list

      private final List<org.javacc.parser.Lookahead> phase2list
      These lists are used to maintain expansions for which code generation in phase 2 and phase 3 is required. Whenever a call is generated to a phase 2 or phase 3 routine, a corresponding entry is added here if it has not already been added. The phase 3 routines have been optimized in version 0.7pre2. Essentially only those methods (and only those portions of these methods) are generated that are required. The lookahead amount is used to determine this. This change requires the use of a hash table because it is now possible for the same phase 3 routine to be requested multiple times with different lookaheads. The hash table provides a easily searchable capability to determine the previous requests. The phase 3 routines now are performed in a two step process - the first step gathers the requests (replacing requests with lower lookaheads with those requiring larger lookaheads). The second step then generates these methods. This optimization and the hashtable makes it look like we do not need the flag "phase3done" any more. But this has not been removed yet.

    • phase3list

      private final List<Phase3Data> phase3list

    • phase3table

      private final Hashtable<org.javacc.parser.Expansion,Phase3Data> phase3table

    • firstSet

      private boolean[] firstSet
      An array used to store the first sets generated by the following method. A true entry means that the corresponding token is in the first set.

    • NOOPENSTM

      private final int NOOPENSTM
      Constants used in the following method "buildLookaheadChecker".
      See Also:

    • OPENIF

      private final int OPENIF
      See Also:

    • OPENSWITCH

      private final int OPENSWITCH
      See Also:

    • xsp_declared

      private boolean xsp_declared

    • jj3_expansion

      private org.javacc.parser.Expansion jj3_expansion

  • Constructor Details

    • ParserCodeGenerator

      ParserCodeGenerator(org.javacc.parser.Context context)

  • Method Details

    • printInclude

      void printInclude(String include)

    • generateCode

      public void generateCode(org.javacc.parser.CodeGeneratorSettings settings, org.javacc.parser.ParserData parserData)
      Specified by:
      generateCode in interface org.javacc.parser.ParserCodeGenerator

    • finish

      public void finish(org.javacc.parser.CodeGeneratorSettings settings, org.javacc.parser.ParserData parserData)
      Specified by:
      finish in interface org.javacc.parser.ParserCodeGenerator

    • javaCodeCheck

      private boolean javaCodeCheck(org.javacc.parser.Expansion exp)
      Returns true if there is a JAVACODE production that the argument expansion may directly expand to (without consuming tokens or encountering lookahead).

    • genFirstSet

      private void genFirstSet(org.javacc.parser.Expansion exp)
      Sets up the array "firstSet" above based on the Expansion argument passed to it. Since this is a recursive function, it assumes that "firstSet" has been reset before the first call.

    • buildLookaheadChecker

      private String buildLookaheadChecker(org.javacc.parser.Lookahead[] conds, String[] actions)
      This method takes two parameters - an array of Lookahead's "conds", and an array of String's "actions". "actions" contains exactly one element more than "conds". "actions" are Java source code, and "conds" translate to conditions - so lets say "f(conds[i])" is true if the lookahead required by "conds[i]" is indeed the case. This method returns a string corresponding to the Java code for: if (f(conds[0]) actions[0] else if (f(conds[1]) actions[1] . . . else actions[action.length-1] A particular action entry ("actions[i]") can be null, in which case, a noop is generated for that action.

    • dumpFormattedString

      private void dumpFormattedString(String str)

    • generateCPPMethodheader

      private String generateCPPMethodheader(org.javacc.parser.BNFProduction p, org.javacc.parser.Token t)

    • genStackCheck

      private void genStackCheck(boolean voidReturn)

    • buildPhase1Routine

      private void buildPhase1Routine(org.javacc.parser.BNFProduction p)

    • phase1NewLine

      private void phase1NewLine()

    • phase1ExpansionGen

      private String phase1ExpansionGen(org.javacc.parser.Expansion e)

    • buildPhase2Routine

      private void buildPhase2Routine(org.javacc.parser.Lookahead la)

    • genReturn

      private String genReturn(boolean value)

    • getTokenImages

      private static String getTokenImages()

    • getTokenLabels

      private static String getTokenLabels()

    • generate3R

      private void generate3R(org.javacc.parser.Expansion e, Phase3Data inf)

    • setupPhase3Builds

      private void setupPhase3Builds(Phase3Data inf)

    • addTokenNamespace

      private static String addTokenNamespace(String token)

    • getTokenType

      private String getTokenType()

    • getTokenTypePointer

      private String getTokenTypePointer()

    • genjj_3Call

      private String genjj_3Call(org.javacc.parser.Expansion e)

    • buildPhase3Routine

      private void buildPhase3Routine(Phase3Data inf, boolean recursive_call)

    • minimumSize

      private int minimumSize(org.javacc.parser.Expansion e)

    • minimumSize

      private int minimumSize(org.javacc.parser.Expansion e, int oldMin)

    • build

      private void build(CppCodeBuilder codeGenerator)