| java.lang.Object
 java_cup.emit
| emit | | public class emit (Code) | | This class handles emitting generated code for the resulting parser.
The various parse tables must be constructed, etc. before calling any
routines in this class.
Three classes are produced by this code:
- symbol constant class
- this contains constant declarations for each terminal (and
optionally each non-terminal).
- action class
- this non-public class contains code to invoke all the user actions
that were embedded in the parser specification.
- parser class
- the specialized parser class consisting primarily of some user
supplied general and initialization code, and the parse tables.
Three parse tables are created as part of the parser class:
- production table
- lists the LHS non terminal number, and the length of the RHS of
each production.
- action table
- for each state of the parse machine, gives the action to be taken
(shift, reduce, or error) under each lookahead symbol.
- reduce-goto table
- when a reduce on a given production is taken, the parse stack is
popped back a number of elements corresponding to the RHS of the
production. This reveals a prior state, which we transition out
of under the LHS non terminal symbol for the production (as if we
had seen the LHS symbol rather than all the symbols matching the
RHS). This table is indexed by non terminal numbers and indicates
how to make these transitions.
In addition to the method interface, this class maintains a series of
public global variables and flags indicating how misc. parts of the code
and other output is to be produced, and counting things such as number of
conflicts detected (see the source code and public variables below for
more details).
This class is "static" (contains only static data and methods).
See Also: java_cup.main
version:
last update: 11/25/95
author:
Scott Hudson |
| Method Summary | |
| public static void | clear()
| | protected static void | do_action_table(PrintWriter out, parse_action_table act_tab, boolean compact_reduces)
Emit the action table. | | protected static int | do_escaped(PrintWriter out, char c)
| | protected static int | do_newline(PrintWriter out, int nchar, int nbytes)
| | protected static void | do_reduce_table(PrintWriter out, parse_reduce_table red_tab)
Emit the reduce-goto table. | | protected static void | do_table_as_string(PrintWriter out, short[][] sa)
| | protected static void | emit_action_code(PrintWriter out, production start_prod)
Emit code for the non-public class holding the actual action code. | | protected static void | emit_package(PrintWriter out)
Emit a package spec if the user wants one. | | protected static void | emit_production_table(PrintWriter out)
Emit the production table. | | public static boolean | lr_values()
| | public static void | parser(PrintWriter out, parse_action_table action_table, parse_reduce_table reduce_table, int start_st, production start_prod, boolean compact_reduces, boolean suppress_scanner)
Emit the parser subclass with embedded tables. | | protected static String | pre(String str)
Build a string with the standard prefix. | | protected static void | set_lr_values(boolean b)
| | public static void | symbols(PrintWriter out, boolean emit_non_terms, boolean sym_interface)
Emit code for the symbol constant class, optionally including non terms,
if they have been requested. | | protected static String | typeArgument()
TUM changes; proposed by Henning Niss 20050628
Build a string with the specified type arguments,
if present, otherwise an empty string. |
| _lr_values | | protected static boolean _lr_values(Code) | | |
| action_code | | public static String action_code(Code) | | User declarations for direct inclusion in user action class.
|
| action_code_time | | public static long action_code_time(Code) | | Time to produce action code class.
|
| action_table_time | | public static long action_table_time(Code) | | Time to produce the action table.
|
| class_type_argument | | public static String class_type_argument(Code) | | TUM changes; proposed by Henning Niss 20050628: Type arguments for class declaration
|
| goto_table_time | | public static long goto_table_time(Code) | | Time to produce the reduce-goto table.
|
| import_list | | public static Stack import_list(Code) | | List of imports (Strings containing class names) to go with actions.
|
| init_code | | public static String init_code(Code) | | User code for user_init() which is called during parser initialization.
|
| not_reduced | | public static int not_reduced(Code) | | Count of the number on non-reduced productions found.
|
| nowarn | | public static boolean nowarn(Code) | | Do we skip warnings?
|
| num_conflicts | | public static int num_conflicts(Code) | | Number of conflict found while building tables.
|
| package_name | | public static String package_name(Code) | | Package that the resulting code goes into (null is used for unnamed).
|
| parser_class_name | | public static String parser_class_name(Code) | | Name of the generated parser class.
|
| parser_code | | public static String parser_code(Code) | | User declarations for direct inclusion in parser class.
|
| parser_time | | public static long parser_time(Code) | | Time to produce parser class.
|
| prefix | | public static String prefix(Code) | | The prefix placed on names that pollute someone else's name space.
|
| production_table_time | | public static long production_table_time(Code) | | Time to produce the production table.
|
| scan_code | | public static String scan_code(Code) | | User code for scan() which is called to get the next Symbol.
|
| start_production | | public static production start_production(Code) | | The start production of the grammar.
|
| symbol_const_class_name | | public static String symbol_const_class_name(Code) | | Name of the generated class for symbol constants.
|
| symbols_time | | public static long symbols_time(Code) | | Time to produce symbol constant class.
|
| unused_non_term | | public static int unused_non_term(Code) | | Count of unused non terminals.
|
| unused_term | | public static int unused_term(Code) | | Count of unused terminals.
|
| clear | | public static void clear()(Code) | | |
| do_action_table | | protected static void do_action_table(PrintWriter out, parse_action_table act_tab, boolean compact_reduces) throws internal_error(Code) | | Emit the action table.
Parameters:
out - stream to produce output on.
Parameters:
act_tab - the internal representation of the action table.
Parameters:
compact_reduces - do we use the most frequent reduce as default? |
| do_newline | | protected static int do_newline(PrintWriter out, int nchar, int nbytes)(Code) | | |
| do_reduce_table | | protected static void do_reduce_table(PrintWriter out, parse_reduce_table red_tab)(Code) | | Emit the reduce-goto table.
Parameters:
out - stream to produce output on.
Parameters:
red_tab - the internal representation of the reduce-goto table. |
| do_table_as_string | | protected static void do_table_as_string(PrintWriter out, short[][] sa)(Code) | | |
| emit_action_code | | protected static void emit_action_code(PrintWriter out, production start_prod) throws internal_error(Code) | | Emit code for the non-public class holding the actual action code.
Parameters:
out - stream to produce output on.
Parameters:
start_prod - the start production of the grammar. |
| emit_package | | protected static void emit_package(PrintWriter out)(Code) | | Emit a package spec if the user wants one.
Parameters:
out - stream to produce output on. |
| emit_production_table | | protected static void emit_production_table(PrintWriter out)(Code) | | Emit the production table.
Parameters:
out - stream to produce output on. |
| lr_values | | public static boolean lr_values()(Code) | | whether or not to emit code for left and right values
|
| parser | | public static void parser(PrintWriter out, parse_action_table action_table, parse_reduce_table reduce_table, int start_st, production start_prod, boolean compact_reduces, boolean suppress_scanner) throws internal_error(Code) | | Emit the parser subclass with embedded tables.
Parameters:
out - stream to produce output on.
Parameters:
action_table - internal representation of the action table.
Parameters:
reduce_table - internal representation of the reduce-goto table.
Parameters:
start_st - start state of the parse machine.
Parameters:
start_prod - start production of the grammar.
Parameters:
compact_reduces - do we use most frequent reduce as default?
Parameters:
suppress_scanner - should scanner be suppressed for compatibility? |
| pre | | protected static String pre(String str)(Code) | | Build a string with the standard prefix.
Parameters:
str - string to prefix. |
| set_lr_values | | protected static void set_lr_values(boolean b)(Code) | | |
| symbols | | public static void symbols(PrintWriter out, boolean emit_non_terms, boolean sym_interface)(Code) | | Emit code for the symbol constant class, optionally including non terms,
if they have been requested.
Parameters:
out - stream to produce output on.
Parameters:
emit_non_terms - do we emit constants for non terminals?
Parameters:
sym_interface - should we emit an interface, rather than a class? |
| typeArgument | | protected static String typeArgument()(Code) | | TUM changes; proposed by Henning Niss 20050628
Build a string with the specified type arguments,
if present, otherwise an empty string.
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