Generate MyParser.cpp, MyParser.hpp, MyLexer.cpp, MyLexer.hpp
and MyParserTokenTypes.hpp
DEBUG_CPP_CODE_GENERATOR
(package private) boolean DEBUG_CPP_CODE_GENERATOR
NONUNIQUE
protected static final String NONUNIQUE
astVarNumber
(package private) int astVarNumber
caseSizeThreshold
public static final int caseSizeThreshold
commonExtraArgs
(package private) String commonExtraArgs
commonExtraParams
(package private) String commonExtraParams
commonLocalVars
(package private) String commonLocalVars
currentASTResult
(package private) String currentASTResult
currentRule
(package private) RuleBlock currentRule
declaredASTVariables
(package private) Hashtable declaredASTVariables
Used to keep track of which AST variables have been defined in a rule
(except for the #rule_name and #rule_name_in var's
exceptionThrown
(package private) String exceptionThrown
genAST
protected boolean genAST
genHashLines
protected boolean genHashLines
labeledElementASTInit
(package private) String labeledElementASTInit
labeledElementASTType
(package private) String labeledElementASTType
labeledElementInit
(package private) String labeledElementInit
labeledElementType
(package private) String labeledElementType
lt1Value
(package private) String lt1Value
noConstructors
protected boolean noConstructors
outputFile
protected String outputFile
outputLine
protected int outputLine
saveText
protected boolean saveText
syntacticPredLevel
protected int syntacticPredLevel
throwNoViable
(package private) String throwNoViable
treeVariableMap
(package private) Hashtable treeVariableMap
usingCustomAST
(package private) boolean usingCustomAST
_print
protected void _print(String s)
Output a String to the currentOutput stream.
Ignored if string is null.
- _print in interface CodeGenerator
_printAction
protected void _printAction(String s)
Print an action without leading tabs, attempting to
preserve the current indentation level for multi-line actions
Ignored if string is null.
- _printAction in interface CodeGenerator
s
- The action string to output
_println
protected void _println(String s)
Output a String followed by newline, to the currentOutput stream.
Ignored if string is null.
- _println in interface CodeGenerator
addSemPred
protected int addSemPred(String predicate)
Adds a semantic predicate string to the sem pred vector
These strings will be used to build an array of sem pred names
when building a debugging parser. This method should only be
called when the debug option is specified
countLines
protected int countLines(String s)
exitIfError
public void exitIfError()
gen
public void gen()
Generate the parser, lexer, treeparser, and token types in C++
- gen in interface CodeGenerator
genASTDeclaration
protected void genASTDeclaration(AlternativeElement el,
String node_type)
genASTDeclaration
protected void genASTDeclaration(AlternativeElement el,
String var_name,
String node_type)
genAlt
protected void genAlt(Alternative alt,
AlternativeBlock blk)
Generate an alternative.
alt
- The alternative to generateblk
- The block to which the alternative belongs
genBitsets
protected void genBitsets(Vector bitsetList,
int maxVocabulary,
String prefix)
Generate all the bitsets to be used in the parser or lexer
Generate the raw bitset data like "long _tokenSet1_data[] = {...};"
and the BitSet object declarations like
"BitSet _tokenSet1 = new BitSet(_tokenSet1_data);"
Note that most languages do not support object initialization inside a
class definition, so other code-generators may have to separate the
bitset declarations from the initializations (e.g., put the
initializations in the generated constructor instead).
bitsetList
- The list of bitsets to generate.maxVocabulary
- Ensure that each generated bitset can contain at
least this value.prefix
- string glued in from of bitset names used for namespace
qualifications.
genBitsetsHeader
protected void genBitsetsHeader(Vector bitsetList,
int maxVocabulary)
genBlockInitAction
protected void genBlockInitAction(AlternativeBlock blk)
Generate the initaction for a block, which may be a RuleBlock or a
plain AlternativeBLock.
genBlockPreamble
protected void genBlockPreamble(AlternativeBlock blk)
Generate the header for a block, which may be a RuleBlock or a
plain AlternativeBlock. This generates any variable declarations
and syntactic-predicate-testing variables.
genBody
public void genBody(LexerGrammar g)
throws IOException
genCases
protected void genCases(BitSet p)
Generate a series of case statements that implement a BitSet test.
p
- The Bitset for which cases are to be generated
genCommonBlock
public CppBlockFinishingInfo genCommonBlock(AlternativeBlock blk,
boolean noTestForSingle)
Generate common code for a block of alternatives; return a postscript
that needs to be generated at the end of the block. Other routines
may append else-clauses and such for error checking before the postfix
is generated.
If the grammar is a lexer, then generate alternatives in an order where
alternatives requiring deeper lookahead are generated first, and
EOF in the lookahead set reduces the depth of the lookahead.
blk
- The block to generatenoTestForSingle
- If true, then it does not generate a test for a single alternative.
genHeader
protected void genHeader(String fileName)
Generate a header that is common to all C++ files
genInclude
public void genInclude(LexerGrammar g)
throws IOException
genInclude
public void genInclude(ParserGrammar g)
throws IOException
genInitFactory
public void genInitFactory(Grammar g)
genLineNo
public void genLineNo(GrammarElement el)
Generate a #line or // line depending on options
genLineNo
public void genLineNo(Token t)
Generate a #line or // line depending on options
genLineNo
public void genLineNo(int line)
Generate a #line or // line depending on options
genLineNo2
public void genLineNo2()
Generate a #line or // line depending on options
genMatch
protected void genMatch(BitSet b)
genMatchUsingAtomText
protected void genMatchUsingAtomText(GrammarAtom atom)
genMatchUsingAtomTokenType
protected void genMatchUsingAtomTokenType(GrammarAtom atom)
genNextToken
public void genNextToken()
Generate the nextToken() rule.
nextToken() is a synthetic lexer rule that is the implicit OR of all
user-defined lexer rules.
genRule
public void genRule(RuleSymbol s,
boolean startSymbol,
int ruleNum,
String prefix)
Gen a named rule block.
ASTs are generated for each element of an alternative unless
the rule or the alternative have a '!' modifier.
If an alternative defeats the default tree construction, it
must set _AST to the root of the returned AST.
Each alternative that does automatic tree construction, builds
up root and child list pointers in an ASTPair structure.
A rule finishes by setting the returnAST variable from the
ASTPair.
startSymbol
- true if the rule is a start symbol (i.e., not referenced elsewhere)
genRuleHeader
public void genRuleHeader(RuleSymbol s,
boolean startSymbol)
genSemPred
protected void genSemPred(String pred,
int line)
genSemPredMap
protected void genSemPredMap(String prefix)
Write an array of Strings which are the semantic predicate
expressions. The debugger will reference them by number only
genSynPred
protected void genSynPred(SynPredBlock blk,
String lookaheadExpr)
genTokenStrings
public void genTokenStrings(String prefix)
Generate a static array containing the names of the tokens,
indexed by the token type values. This static array is used
to format error messages so that the token identifers or literal
strings are displayed instead of the token numbers.
If a lexical rule has a paraphrase, use it rather than the
token label.
genTokenTypes
protected void genTokenTypes(TokenManager tm)
throws IOException
Generate the token types C++ file
getASTCreateString
public String getASTCreateString(String str)
Get a string for an expression to generate creating of an AST node
str
- The arguments to the AST constructor
getASTCreateString
public String getASTCreateString(GrammarAtom atom,
String str)
Get a string for an expression to generate creating of an AST node
- getASTCreateString in interface CodeGenerator
str
- The arguments to the AST constructor
getASTCreateString
public String getASTCreateString(Vector v)
Get a string for an expression to generate creation of an AST subtree.
- getASTCreateString in interface CodeGenerator
v
- A Vector of String, where each element is an expression
in the target language yielding an AST node.
getLookaheadTestExpression
protected String getLookaheadTestExpression(Alternative alt,
int maxDepth)
Generate a lookahead test expression for an alternate. This
will be a series of tests joined by '&&' and enclosed by '()',
the number of such tests being determined by the depth of the lookahead.
getLookaheadTestExpression
protected String getLookaheadTestExpression(Lookahead[] look,
int k)
getLookaheadTestTerm
protected String getLookaheadTestTerm(int k,
BitSet p)
Generate a depth==1 lookahead test expression given the BitSet.
This may be one of:
1) a series of 'x==X||' tests
2) a range test using >= && <= where possible,
3) a bitset membership test for complex comparisons
k
- The lookahead levelp
- The lookahead set for level k
getRangeExpression
public String getRangeExpression(int k,
int[] elems)
Return an expression for testing a contiguous renage of elements
k
- The lookahead levelelems
- The elements representing the set, usually from BitSet.toArray().
- String containing test expression.
lookaheadIsEmpty
protected boolean lookaheadIsEmpty(Alternative alt,
int maxDepth)
Is the lookahead for this alt empty?
mapTreeId
public String mapTreeId(String idParam,
ActionTransInfo transInfo)
Map an identifier to it's corresponding tree-node variable.
This is context-sensitive, depending on the rule and alternative
being generated
- mapTreeId in interface CodeGenerator
idParam
- The identifier name to map
- The mapped id (which may be the same as the input), or null if the mapping is invalid due to duplicates
printAction
public void printAction(Token t)
Print an action stored in a token surrounded by #line stuff
printHeaderAction
public void printHeaderAction(String name)
Print a header action by #line stuff also process any tree construction
name
- The name of the header part
println
protected void println(String s)
Output tab indent followed by a String followed by newline,
to the currentOutput stream. Ignored if string is null.
- println in interface CodeGenerator
processActionForSpecialSymbols
protected String processActionForSpecialSymbols(String actionStr,
int line,
RuleBlock currentRule,
ActionTransInfo tInfo)
Lexically process tree-specifiers in the action.
This will replace #id and #(...) with the appropriate
function calls and/or variables.
- processActionForSpecialSymbols in interface CodeGenerator
processStringForASTConstructor
public String processStringForASTConstructor(String str)
Process a string for an simple expression for use in xx/action.g
it is used to cast simple tokens/references to the right type for
the generated language. Basically called for every element in
the vector to getASTCreateString(vector V)
- processStringForASTConstructor in interface CodeGenerator