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Groovy: A powerful, dynamic language for the JVM
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.codehaus.groovy.syntax;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.HashSet;
import java.util.Set;
import java.util.Collections;
import java.util.Collection;
import org.codehaus.groovy.GroovyBugError;
/**
* Typing information for the CST system. The types here are those
* used by CSTNode, Token, and Reduction.
*
* @author bob mcwhirter
* @author Chris Poirier
*/
public class Types
{
//---------------------------------------------------------------------------
// TYPES: NOTE THAT ORDERING AND VALUES ARE IMPORTANT TO LOCAL ROUTINES!
//
// SPECIAL TOKENS
public static final int EOF = -1; // end of file
public static final int UNKNOWN = 0; // the unknown token
//
// RELEVANT WHITESPACE
public static final int NEWLINE = 5; // \n
//
// OPERATORS AND OTHER MARKERS
public static final int LEFT_CURLY_BRACE = 10; // {
public static final int RIGHT_CURLY_BRACE = 20; // }
public static final int LEFT_SQUARE_BRACKET = 30; // [
public static final int RIGHT_SQUARE_BRACKET = 40; // ]
public static final int LEFT_PARENTHESIS = 50; // (
public static final int RIGHT_PARENTHESIS = 60; // )
public static final int DOT = 70; // .
public static final int DOT_DOT = 75; // ..
public static final int DOT_DOT_DOT = 77; // ...
public static final int NAVIGATE = 80; // ->
public static final int FIND_REGEX = 90; // =~
public static final int MATCH_REGEX = 94; // ==~
public static final int REGEX_PATTERN = 97; // ~
public static final int EQUAL = 100; // =
public static final int EQUALS = EQUAL;
public static final int ASSIGN = EQUAL;
public static final int COMPARE_NOT_EQUAL = 120; // !=
public static final int COMPARE_IDENTICAL = 121; // ===
public static final int COMPARE_NOT_IDENTICAL = 122; // !==
public static final int COMPARE_EQUAL = 123; // ==
public static final int COMPARE_LESS_THAN = 124; // <
public static final int COMPARE_LESS_THAN_EQUAL = 125; // <=
public static final int COMPARE_GREATER_THAN = 126; // >
public static final int COMPARE_GREATER_THAN_EQUAL = 127; // >=
public static final int COMPARE_TO = 128; // <=>
public static final int NOT = 160; // !
public static final int LOGICAL_OR = 162; // ||
public static final int LOGICAL_AND = 164; // &&
public static final int LOGICAL_OR_EQUAL = 166; // ||=
public static final int LOGICAL_AND_EQUAL = 168; // &&=
public static final int PLUS = 200; // +
public static final int MINUS = 201; // -
public static final int MULTIPLY = 202; // *
public static final int DIVIDE = 203; // /
public static final int INTDIV = 204; // \
public static final int MOD = 205; // %
public static final int STAR_STAR = 206; // **
public static final int POWER = STAR_STAR; // **
public static final int PLUS_EQUAL = 210; // +=
public static final int MINUS_EQUAL = 211; // -=
public static final int MULTIPLY_EQUAL = 212; // *=
public static final int DIVIDE_EQUAL = 213; // /=
public static final int INTDIV_EQUAL = 214; // \=
public static final int MOD_EQUAL = 215; // %=
public static final int POWER_EQUAL = 216; // **=
public static final int PLUS_PLUS = 250; // ++
public static final int PREFIX_PLUS_PLUS = 251; // ++
public static final int POSTFIX_PLUS_PLUS = 252; // ++
public static final int PREFIX_PLUS = 253; // +
public static final int MINUS_MINUS = 260; // --
public static final int PREFIX_MINUS_MINUS = 261; // --
public static final int POSTFIX_MINUS_MINUS = 262; // --
public static final int PREFIX_MINUS = 263; // - (negation)
public static final int LEFT_SHIFT = 280; // <<
public static final int RIGHT_SHIFT = 281; // >>
public static final int RIGHT_SHIFT_UNSIGNED = 282; // >>>
public static final int LEFT_SHIFT_EQUAL = 285; // <<=
public static final int RIGHT_SHIFT_EQUAL = 286; // >>=
public static final int RIGHT_SHIFT_UNSIGNED_EQUAL = 287; // >>>=
public static final int STAR = MULTIPLY;
public static final int COMMA = 300; // -
public static final int COLON = 310; // :
public static final int SEMICOLON = 320; // ;
public static final int QUESTION = 330; // ?
// TODO refactor PIPE to be BITWISE_OR
public static final int PIPE = 340; // |
public static final int DOUBLE_PIPE = LOGICAL_OR; // ||
public static final int BITWISE_OR = PIPE; // |
public static final int BITWISE_AND = 341; // &
public static final int BITWISE_XOR = 342; // ^
public static final int BITWISE_OR_EQUAL = 350; // |=
public static final int BITWISE_AND_EQUAL = 351; // &=
public static final int BITWISE_XOR_EQUAL = 352; // ^=
public static final int BITWISE_NEGATION = REGEX_PATTERN; // ~
//
// LITERALS
public static final int STRING = 400; // any bare string data
public static final int IDENTIFIER = 440; // anything text and not a keyword
public static final int INTEGER_NUMBER = 450; // integer
public static final int DECIMAL_NUMBER = 451; // decimal
//
// KEYWORDS: (PRIMARILY) CLASS/METHOD DECLARATION MODIFIERS
public static final int KEYWORD_PRIVATE = 500; // declaration visibility
public static final int KEYWORD_PROTECTED = 501; // declaration visibility
public static final int KEYWORD_PUBLIC = 502; // declaration visibility
public static final int KEYWORD_ABSTRACT = 510; // method body missing
public static final int KEYWORD_FINAL = 511; // declaration cannot be overridden
public static final int KEYWORD_NATIVE = 512; // a native code entry point
public static final int KEYWORD_TRANSIENT = 513; // property should not be persisted
public static final int KEYWORD_VOLATILE = 514; // compiler should never cache property
public static final int KEYWORD_SYNCHRONIZED = 520; // modifier and block type
public static final int KEYWORD_STATIC = 521; // modifier and block type
//
// KEYWORDS: TYPE SYSTEM
public static final int KEYWORD_DEF = 530; // identifies a function declaration
public static final int KEYWORD_DEFMACRO = 539; // XXX br identifies a macro declaration
public static final int KEYWORD_CLASS = 531; // identifies a class declaration
public static final int KEYWORD_INTERFACE = 532; // identifies an interface declaration
public static final int KEYWORD_MIXIN = 533; // identifies a mixin declaration
public static final int KEYWORD_IMPLEMENTS = 540; // specifies the interfaces implemented by a class
public static final int KEYWORD_EXTENDS = 541; // specifies the base class/interface for a new one
public static final int KEYWORD_THIS = 542; // method variable points to the current instance
public static final int KEYWORD_SUPER = 543; // method variable points to the base instance
public static final int KEYWORD_INSTANCEOF = 544; // type comparator
public static final int KEYWORD_PROPERTY = 545; // deprecated; identifies a property
public static final int KEYWORD_NEW = 546; // used to create a new instance of a class
public static final int KEYWORD_PACKAGE = 550; // declares the package scope
public static final int KEYWORD_IMPORT = 551; // declares an external class
public static final int KEYWORD_AS = 552; // used in import statements to create an alias
//
// KEYWORDS: CONTROL STRUCTURES
public static final int KEYWORD_RETURN = 560; // returns from a closure or method
public static final int KEYWORD_IF = 561; // if
public static final int KEYWORD_ELSE = 562; // else
public static final int KEYWORD_DO = 570; // do loop
public static final int KEYWORD_WHILE = 571; // while loop
public static final int KEYWORD_FOR = 572; // for loop
public static final int KEYWORD_IN = 573; // for (each) loop separator
public static final int KEYWORD_BREAK = 574; // exits a loop or block
public static final int KEYWORD_CONTINUE = 575; // restarts a loop on the next iteration
public static final int KEYWORD_SWITCH = 576; // switch block
public static final int KEYWORD_CASE = 577; // item in a switch block
public static final int KEYWORD_DEFAULT = 578; // catch-all item in a switch block
public static final int KEYWORD_TRY = 580; // block to monitor for exceptions
public static final int KEYWORD_CATCH = 581; // catch block for a particular exception
public static final int KEYWORD_FINALLY = 582; // block to always execute on exit of the try
public static final int KEYWORD_THROW = 583; // statement to throw an exception
public static final int KEYWORD_THROWS = 584; // method modifier to declare thrown transactions
public static final int KEYWORD_ASSERT = 585; // alternate throw for code invariants
//
// KEYWORDS: PRIMITIVE TYPES
public static final int KEYWORD_VOID = 600; // void
public static final int KEYWORD_BOOLEAN = 601; // boolean
public static final int KEYWORD_BYTE = 602; // 1 byte integer
public static final int KEYWORD_SHORT = 603; // 2 byte integer
public static final int KEYWORD_INT = 604; // 4 byte integer
public static final int KEYWORD_LONG = 605; // 8 byte integer
public static final int KEYWORD_FLOAT = 606; // 32 bit floating point number
public static final int KEYWORD_DOUBLE = 607; // 64 bit floating point number
public static final int KEYWORD_CHAR = 608; // unicode character code
//
// KEYWORDS: SPECIAL VALUES
public static final int KEYWORD_TRUE = 610; // boolean truth
public static final int KEYWORD_FALSE = 611; // boolean false
public static final int KEYWORD_NULL = 612; // missing instance
//
// KEYWORDS: RESERVED
public static final int KEYWORD_CONST = 700; // reserved in java and groovy
public static final int KEYWORD_GOTO = 701; // reserved in java and groovy
//
// SPECIAL (CALCULATED) MEANINGS
public static final int SYNTH_COMPILATION_UNIT = 800; // reserved: a synthetic root for a CST
public static final int SYNTH_CLASS = 801; // applied to class names
public static final int SYNTH_INTERFACE = 802; // applied to interface names
public static final int SYNTH_MIXIN = 803; // applied to mixin names
public static final int SYNTH_METHOD = 804; // applied to method names
public static final int SYNTH_PROPERTY = 805; // applied to property names
public static final int SYNTH_PARAMETER_DECLARATION = 806; // applied to method/closure parameter names
public static final int SYNTH_LIST = 810; // applied to "[" that marks a list
public static final int SYNTH_MAP = 811; // applied to "[" that marks a map
public static final int SYNTH_GSTRING = 812; // a complete GString
public static final int SYNTH_METHOD_CALL = 814; // applied to the optional "(" that marks a call to a method
public static final int SYNTH_CAST = 815; // applied to "(" that marks a type cast
public static final int SYNTH_BLOCK = 816; // applied to "{" that marks a block
public static final int SYNTH_CLOSURE = 817; // applied to "{" that marks a closure
public static final int SYNTH_LABEL = 818; // applied to a statement label
public static final int SYNTH_TERNARY = 819; // applied to "?" that marks a ternary expression
public static final int SYNTH_TUPLE = 820; // applied to "{" that marks an array initializer
public static final int SYNTH_VARIABLE_DECLARATION = 830; // applied to an identifier that specifies
// the type of a variable declaration
//
// GSTRING TOKENS
public static final int GSTRING_START = 901; // any marker tha begins a GString
public static final int GSTRING_END = 902; // any matching marker that ends a GString
public static final int GSTRING_EXPRESSION_START = 903; // the ${ marker that starts a GString expression
public static final int GSTRING_EXPRESSION_END = 904; // the } marker that ends a GString expression
//
// TYPE CLASSES
public static final int ANY = 1000; // anything
public static final int NOT_EOF = 1001; // anything but EOF
public static final int GENERAL_END_OF_STATEMENT = 1002; // ";", "\n", EOF
public static final int ANY_END_OF_STATEMENT = 1003; // ";", "\n", EOF, "}"
public static final int ASSIGNMENT_OPERATOR = 1100; // =, +=, etc.
public static final int COMPARISON_OPERATOR = 1101; // ==, ===, >, <, etc.
public static final int MATH_OPERATOR = 1102; // +, -, / *, %, plus the LOGICAL_OPERATORS
public static final int LOGICAL_OPERATOR = 1103; // ||, &&, !
public static final int RANGE_OPERATOR = 1104; // .., ...
public static final int REGEX_COMPARISON_OPERATOR = 1105; // =~, etc.
public static final int DEREFERENCE_OPERATOR = 1106; // ., ->
public static final int BITWISE_OPERATOR = 1107; // |, &, <<, >>, >>>, ^, ~
public static final int PREFIX_OPERATOR = 1200; // ++, !, etc.
public static final int POSTFIX_OPERATOR = 1210; // ++, etc.
public static final int INFIX_OPERATOR = 1220; // +, -, =, etc.
public static final int PREFIX_OR_INFIX_OPERATOR = 1230; // +, -
public static final int PURE_PREFIX_OPERATOR = 1235; // prefix +, prefix -
public static final int KEYWORD = 1300; // any keyword
public static final int SYMBOL = 1301; // any symbol
public static final int LITERAL = 1310; // strings, numbers, identifiers
public static final int NUMBER = 1320; // integers and decimals
public static final int SIGN = 1325; // "+", "-"
public static final int NAMED_VALUE = 1330; // true, false, null
public static final int TRUTH_VALUE = 1331; // true, false
public static final int PRIMITIVE_TYPE = 1340; // void, byte, short, int, etc.
public static final int CREATABLE_PRIMITIVE_TYPE = 1341; // any PRIMITIVE_TYPE except void
public static final int LOOP = 1350; // do, while, etc.
public static final int RESERVED_KEYWORD = 1360; // const, goto, etc.
public static final int KEYWORD_IDENTIFIER = 1361; // keywords that can appear as identifiers
public static final int SYNTHETIC = 1370; // any of the SYNTH types
public static final int TYPE_DECLARATION = 1400; // class, interface, mixin
public static final int DECLARATION_MODIFIER = 1410; // public, private, abstract, etc.
public static final int TYPE_NAME = 1420; // identifiers, primitive types
public static final int CREATABLE_TYPE_NAME = 1430; // identifiers, primitive types except void
public static final int MATCHED_CONTAINER = 1500; // (, ), [, ], {, }
public static final int LEFT_OF_MATCHED_CONTAINER = 1501; // (, [, {
public static final int RIGHT_OF_MATCHED_CONTAINER = 1502; // ), ], }
public static final int EXPRESSION = 1900; // all of the below 1900 series
public static final int OPERATOR_EXPRESSION = 1901; // "."-"<<"
public static final int SYNTH_EXPRESSION = 1902; // cast, ternary, and closure expression
public static final int KEYWORD_EXPRESSION = 1903; // new, this, super, instanceof, true, false, null
public static final int LITERAL_EXPRESSION = 1904; // LITERAL
public static final int ARRAY_EXPRESSION = 1905; // "["
public static final int SIMPLE_EXPRESSION = 1910; // LITERAL, this, true, false, null
public static final int COMPLEX_EXPRESSION = 1911; // SIMPLE_EXPRESSION, and various molecules
//
// TYPE GROUPS (OPERATIONS SUPPORT)
public static final int PARAMETER_TERMINATORS = 2000; // ")", ","
public static final int ARRAY_ITEM_TERMINATORS = 2001; // "]", ","
public static final int TYPE_LIST_TERMINATORS = 2002; // "implements", "throws", "{", ","
public static final int OPTIONAL_DATATYPE_FOLLOWERS = 2003; // identifier, "[", "."
public static final int SWITCH_BLOCK_TERMINATORS = 2004; // "case", "default", "}"
public static final int SWITCH_ENTRIES = 2005; // "case", "default"
public static final int METHOD_CALL_STARTERS = 2006; // LITERAL, "(", "{"
public static final int UNSAFE_OVER_NEWLINES = 2007; // things the expression parser should cross lines for in it doesn't have to
public static final int PRECLUDES_CAST_OPERATOR = 2008; // anything that prevents (X) from being a cast
//---------------------------------------------------------------------------
// TYPE HIERARCHIES
/**
* Given two types, returns true if the second describes the first.
*/
public static boolean ofType( int specific, int general )
{
if( general == specific )
{
return true;
}
switch( general )
{
case ANY:
return true;
case NOT_EOF:
return specific >= UNKNOWN && specific <= SYNTH_VARIABLE_DECLARATION;
case GENERAL_END_OF_STATEMENT:
switch( specific )
{
case EOF:
case NEWLINE:
case SEMICOLON:
return true;
}
break;
case ANY_END_OF_STATEMENT:
switch( specific )
{
case EOF:
case NEWLINE:
case SEMICOLON:
case RIGHT_CURLY_BRACE:
return true;
}
break;
case ASSIGNMENT_OPERATOR:
return specific == EQUAL || (specific >= PLUS_EQUAL && specific <= POWER_EQUAL) || (specific >= LOGICAL_OR_EQUAL && specific <= LOGICAL_AND_EQUAL)
|| (specific >= LEFT_SHIFT_EQUAL && specific <= RIGHT_SHIFT_UNSIGNED_EQUAL)
|| (specific >= BITWISE_OR_EQUAL && specific <= BITWISE_XOR_EQUAL);
case COMPARISON_OPERATOR:
return specific >= COMPARE_NOT_EQUAL && specific <= COMPARE_TO;
case MATH_OPERATOR:
return (specific >= PLUS && specific <= RIGHT_SHIFT_UNSIGNED) || (specific >= NOT && specific <= LOGICAL_AND)
|| (specific >= BITWISE_OR && specific <= BITWISE_XOR);
case LOGICAL_OPERATOR:
return specific >= NOT && specific <= LOGICAL_AND;
case BITWISE_OPERATOR:
return (specific >= BITWISE_OR && specific <= BITWISE_XOR) || specific == BITWISE_NEGATION;
case RANGE_OPERATOR:
return specific == DOT_DOT || specific == DOT_DOT_DOT;
case REGEX_COMPARISON_OPERATOR:
return specific == FIND_REGEX || specific == MATCH_REGEX;
case DEREFERENCE_OPERATOR:
return specific == DOT || specific == NAVIGATE;
case PREFIX_OPERATOR:
switch( specific )
{
case MINUS:
case PLUS_PLUS:
case MINUS_MINUS:
return true;
}
/* FALL THROUGH */
case PURE_PREFIX_OPERATOR:
switch( specific )
{
case REGEX_PATTERN:
case NOT:
case PREFIX_PLUS:
case PREFIX_PLUS_PLUS:
case PREFIX_MINUS:
case PREFIX_MINUS_MINUS:
case SYNTH_CAST:
return true;
}
break;
case POSTFIX_OPERATOR:
switch( specific )
{
case PLUS_PLUS:
case POSTFIX_PLUS_PLUS:
case MINUS_MINUS:
case POSTFIX_MINUS_MINUS:
return true;
}
break;
case INFIX_OPERATOR:
switch( specific )
{
case DOT:
case NAVIGATE:
case LOGICAL_OR:
case LOGICAL_AND:
case BITWISE_OR:
case BITWISE_AND:
case BITWISE_XOR:
case LEFT_SHIFT:
case RIGHT_SHIFT:
case RIGHT_SHIFT_UNSIGNED:
case FIND_REGEX:
case MATCH_REGEX:
case DOT_DOT:
case DOT_DOT_DOT:
case KEYWORD_INSTANCEOF:
return true;
}
return (specific >= COMPARE_NOT_EQUAL && specific <= COMPARE_TO) || (specific >= PLUS && specific <= MOD_EQUAL) || specific == EQUAL || (specific >= PLUS_EQUAL && specific <= POWER_EQUAL) || (specific >= LOGICAL_OR_EQUAL && specific <= LOGICAL_AND_EQUAL)
|| (specific >= LEFT_SHIFT_EQUAL && specific <= RIGHT_SHIFT_UNSIGNED_EQUAL) || (specific >= BITWISE_OR_EQUAL && specific <= BITWISE_XOR_EQUAL);
case PREFIX_OR_INFIX_OPERATOR:
switch( specific )
{
case POWER:
case PLUS:
case MINUS:
case PREFIX_PLUS:
case PREFIX_MINUS:
return true;
}
break;
case KEYWORD:
return specific >= KEYWORD_PRIVATE && specific <= KEYWORD_GOTO;
case SYMBOL:
return specific >= NEWLINE && specific <= PIPE;
case LITERAL:
return specific >= STRING && specific <= DECIMAL_NUMBER;
case NUMBER:
return specific == INTEGER_NUMBER || specific == DECIMAL_NUMBER;
case SIGN:
switch( specific )
{
case PLUS:
case MINUS:
return true;
}
break;
case NAMED_VALUE:
return specific >= KEYWORD_TRUE && specific <= KEYWORD_NULL;
case TRUTH_VALUE:
return specific == KEYWORD_TRUE || specific == KEYWORD_FALSE;
case TYPE_NAME:
if( specific == IDENTIFIER )
{
return true;
}
/* FALL THROUGH */
case PRIMITIVE_TYPE:
return specific >= KEYWORD_VOID && specific <= KEYWORD_CHAR;
case CREATABLE_TYPE_NAME:
if( specific == IDENTIFIER )
{
return true;
}
/* FALL THROUGH */
case CREATABLE_PRIMITIVE_TYPE:
return specific >= KEYWORD_BOOLEAN && specific <= KEYWORD_CHAR;
case LOOP:
switch( specific )
{
case KEYWORD_DO:
case KEYWORD_WHILE:
case KEYWORD_FOR:
return true;
}
break;
case RESERVED_KEYWORD:
return specific >= KEYWORD_CONST && specific <= KEYWORD_GOTO;
case KEYWORD_IDENTIFIER:
switch( specific )
{
case KEYWORD_CLASS:
case KEYWORD_INTERFACE:
case KEYWORD_MIXIN:
case KEYWORD_DEF:
case KEYWORD_DEFMACRO:
case KEYWORD_IN:
case KEYWORD_PROPERTY:
return true;
}
break;
case SYNTHETIC:
return specific >= SYNTH_COMPILATION_UNIT && specific <= SYNTH_VARIABLE_DECLARATION;
case TYPE_DECLARATION:
return specific >= KEYWORD_CLASS && specific <= KEYWORD_MIXIN;
case DECLARATION_MODIFIER:
return specific >= KEYWORD_PRIVATE && specific <= KEYWORD_STATIC;
case MATCHED_CONTAINER:
switch( specific )
{
case LEFT_CURLY_BRACE:
case RIGHT_CURLY_BRACE:
case LEFT_SQUARE_BRACKET:
case RIGHT_SQUARE_BRACKET:
case LEFT_PARENTHESIS:
case RIGHT_PARENTHESIS:
return true;
}
break;
case LEFT_OF_MATCHED_CONTAINER:
switch( specific )
{
case LEFT_CURLY_BRACE:
case LEFT_SQUARE_BRACKET:
case LEFT_PARENTHESIS:
return true;
}
break;
case RIGHT_OF_MATCHED_CONTAINER:
switch( specific )
{
case RIGHT_CURLY_BRACE:
case RIGHT_SQUARE_BRACKET:
case RIGHT_PARENTHESIS:
return true;
}
break;
case PARAMETER_TERMINATORS:
return specific == RIGHT_PARENTHESIS || specific == COMMA;
case ARRAY_ITEM_TERMINATORS:
return specific == RIGHT_SQUARE_BRACKET || specific == COMMA;
case TYPE_LIST_TERMINATORS:
switch( specific )
{
case KEYWORD_IMPLEMENTS:
case KEYWORD_THROWS:
case LEFT_CURLY_BRACE:
case COMMA:
return true;
}
break;
case OPTIONAL_DATATYPE_FOLLOWERS:
switch( specific )
{
case IDENTIFIER:
case LEFT_SQUARE_BRACKET:
case DOT:
return true;
}
break;
case SWITCH_BLOCK_TERMINATORS:
if( specific == RIGHT_CURLY_BRACE )
{
return true;
}
/* FALL THROUGH */
case SWITCH_ENTRIES:
return specific == KEYWORD_CASE || specific == KEYWORD_DEFAULT;
case METHOD_CALL_STARTERS:
if( specific >= STRING && specific <= DECIMAL_NUMBER )
{
return true;
}
switch( specific )
{
case LEFT_PARENTHESIS:
case GSTRING_START:
case SYNTH_GSTRING:
case KEYWORD_NEW:
return true;
}
break;
case UNSAFE_OVER_NEWLINES:
if( ofType(specific, SYMBOL) )
{
switch( specific )
{
case LEFT_CURLY_BRACE:
case LEFT_PARENTHESIS:
case LEFT_SQUARE_BRACKET:
case PLUS:
case PLUS_PLUS:
case MINUS:
case MINUS_MINUS:
case REGEX_PATTERN:
case NOT:
return true;
}
return false;
}
switch( specific )
{
case KEYWORD_INSTANCEOF:
case GSTRING_EXPRESSION_START:
case GSTRING_EXPRESSION_END:
case GSTRING_END:
return false;
}
return true;
case PRECLUDES_CAST_OPERATOR:
switch( specific )
{
case PLUS:
case MINUS:
case PREFIX_MINUS:
case PREFIX_MINUS_MINUS:
case PREFIX_PLUS:
case PREFIX_PLUS_PLUS:
case LEFT_PARENTHESIS:
return false;
}
return !ofType( specific, COMPLEX_EXPRESSION );
case OPERATOR_EXPRESSION:
return specific >= DOT && specific <= RIGHT_SHIFT_UNSIGNED;
case SYNTH_EXPRESSION:
switch( specific )
{
case SYNTH_CAST:
case SYNTH_CLOSURE:
case SYNTH_TERNARY:
return true;
}
break;
case KEYWORD_EXPRESSION:
switch( specific )
{
case KEYWORD_NEW:
case KEYWORD_THIS:
case KEYWORD_SUPER:
case KEYWORD_INSTANCEOF:
case KEYWORD_TRUE:
case KEYWORD_FALSE:
case KEYWORD_NULL:
return true;
}
break;
case LITERAL_EXPRESSION:
return specific >= STRING && specific <= DECIMAL_NUMBER;
case ARRAY_EXPRESSION:
return specific == LEFT_SQUARE_BRACKET;
case EXPRESSION:
if( specific >= DOT && specific <= RIGHT_SHIFT_UNSIGNED )
{
return true;
}
if( specific >= STRING && specific <= DECIMAL_NUMBER )
{
return true;
}
switch( specific )
{
case SYNTH_CAST:
case SYNTH_CLOSURE:
case SYNTH_TERNARY:
case SYNTH_GSTRING:
case KEYWORD_NEW:
case KEYWORD_THIS:
case KEYWORD_SUPER:
case KEYWORD_INSTANCEOF:
case KEYWORD_TRUE:
case KEYWORD_FALSE:
case KEYWORD_NULL:
case LEFT_SQUARE_BRACKET:
return true;
}
break;
case COMPLEX_EXPRESSION:
switch( specific )
{
case KEYWORD_NEW:
case SYNTH_METHOD_CALL:
case SYNTH_GSTRING:
case SYNTH_LIST:
case SYNTH_MAP:
case SYNTH_CLOSURE:
case SYNTH_TERNARY:
case SYNTH_VARIABLE_DECLARATION:
return true;
}
/* FALL THROUGH */
case SIMPLE_EXPRESSION:
if( specific >= STRING && specific <= DECIMAL_NUMBER ) {
return true;
}
switch( specific ) {
case KEYWORD_SUPER:
case KEYWORD_THIS:
case KEYWORD_TRUE:
case KEYWORD_FALSE:
case KEYWORD_NULL:
return true;
}
break;
}
return false;
}
//---------------------------------------------------------------------------
// TYPE COERSIONS
/**
* Given two types, returns true if the first can be viewed as the second.
* NOTE that canMean() is orthogonal to ofType().
*/
public static boolean canMean( int actual, int preferred ) {
if( actual == preferred ) {
return true;
}
switch( preferred ) {
case SYNTH_PARAMETER_DECLARATION:
case IDENTIFIER:
switch( actual ) {
case IDENTIFIER:
case KEYWORD_DEF:
case KEYWORD_DEFMACRO:
case KEYWORD_CLASS:
case KEYWORD_INTERFACE:
case KEYWORD_MIXIN:
return true;
}
break;
case SYNTH_CLASS:
case SYNTH_INTERFACE:
case SYNTH_MIXIN:
case SYNTH_METHOD:
case SYNTH_PROPERTY:
return actual == IDENTIFIER;
case SYNTH_LIST:
case SYNTH_MAP:
return actual == LEFT_SQUARE_BRACKET;
case SYNTH_CAST:
return actual == LEFT_PARENTHESIS;
case SYNTH_BLOCK:
case SYNTH_CLOSURE:
return actual == LEFT_CURLY_BRACE;
case SYNTH_LABEL:
return actual == COLON;
case SYNTH_VARIABLE_DECLARATION:
return actual == IDENTIFIER;
}
return false;
}
/**
* Converts a node from a generic type to a specific prefix type.
* Throws a GroovyBugError if the type can't be converted
* and requested.
*/
public static void makePrefix( CSTNode node, boolean throwIfInvalid ) {
switch( node.getMeaning() ) {
case PLUS:
node.setMeaning( PREFIX_PLUS );
break;
case MINUS:
node.setMeaning( PREFIX_MINUS );
break;
case PLUS_PLUS:
node.setMeaning( PREFIX_PLUS_PLUS );
break;
case MINUS_MINUS:
node.setMeaning( PREFIX_MINUS_MINUS );
break;
default:
if( throwIfInvalid ) {
throw new GroovyBugError( "cannot convert to prefix for type [" + node.getMeaning() + "]" );
}
}
}
/**
* Converts a node from a generic type to a specific postfix type.
* Throws a GroovyBugError if the type can't be converted.
*/
public static void makePostfix( CSTNode node, boolean throwIfInvalid ) {
switch( node.getMeaning() ) {
case PLUS_PLUS:
node.setMeaning( POSTFIX_PLUS_PLUS );
break;
case MINUS_MINUS:
node.setMeaning( POSTFIX_MINUS_MINUS );
break;
default:
if( throwIfInvalid ) {
throw new GroovyBugError( "cannot convert to postfix for type [" + node.getMeaning() + "]" );
}
}
}
//---------------------------------------------------------------------------
// OPERATOR PRECEDENCE
/**
* Returns the precedence of the specified operator. Non-operator's will
* receive -1 or a GroovyBugError, depending on your preference.
*/
public static int getPrecedence( int type, boolean throwIfInvalid ) {
switch( type ) {
case LEFT_PARENTHESIS:
return 0;
case EQUAL:
case PLUS_EQUAL:
case MINUS_EQUAL:
case MULTIPLY_EQUAL:
case DIVIDE_EQUAL:
case INTDIV_EQUAL:
case MOD_EQUAL:
case POWER_EQUAL:
case LOGICAL_OR_EQUAL:
case LOGICAL_AND_EQUAL:
case LEFT_SHIFT_EQUAL:
case RIGHT_SHIFT_EQUAL:
case RIGHT_SHIFT_UNSIGNED_EQUAL:
case BITWISE_OR_EQUAL:
case BITWISE_AND_EQUAL:
case BITWISE_XOR_EQUAL:
return 5;
case QUESTION:
return 10;
case LOGICAL_OR:
return 15;
case LOGICAL_AND:
return 20;
case BITWISE_OR:
case BITWISE_AND:
case BITWISE_XOR:
return 22;
case COMPARE_IDENTICAL:
case COMPARE_NOT_IDENTICAL:
return 24;
case COMPARE_NOT_EQUAL:
case COMPARE_EQUAL:
case COMPARE_LESS_THAN:
case COMPARE_LESS_THAN_EQUAL:
case COMPARE_GREATER_THAN:
case COMPARE_GREATER_THAN_EQUAL:
case COMPARE_TO:
case FIND_REGEX:
case MATCH_REGEX:
case KEYWORD_INSTANCEOF:
return 25;
case DOT_DOT:
case DOT_DOT_DOT:
return 30;
case LEFT_SHIFT:
case RIGHT_SHIFT:
case RIGHT_SHIFT_UNSIGNED:
return 35;
case PLUS:
case MINUS:
return 40;
case MULTIPLY:
case DIVIDE:
case INTDIV:
case MOD:
return 45;
case NOT:
case REGEX_PATTERN:
return 50;
case SYNTH_CAST:
return 55;
case PLUS_PLUS:
case MINUS_MINUS:
case PREFIX_PLUS_PLUS:
case PREFIX_MINUS_MINUS:
case POSTFIX_PLUS_PLUS:
case POSTFIX_MINUS_MINUS:
return 65;
case PREFIX_PLUS:
case PREFIX_MINUS:
return 70;
case POWER:
return 72;
case SYNTH_METHOD:
case LEFT_SQUARE_BRACKET:
return 75;
case DOT:
case NAVIGATE:
return 80;
case KEYWORD_NEW:
return 85;
}
if( throwIfInvalid ) {
throw new GroovyBugError( "precedence requested for non-operator" );
}
return -1;
}
//---------------------------------------------------------------------------
// TEXTS
private static final Map TEXTS = new HashMap(); // symbol/keyword type -> text
private static final Map LOOKUP = new HashMap(); // text -> symbol/keyword type
private static final Set KEYWORDS = new HashSet(); // valid keywords
public static Collection getKeywords() {
return Collections.unmodifiableSet(KEYWORDS);
}
public static boolean isKeyword(final String text) {
return KEYWORDS.contains(text);
}
/**
* Returns the type for the specified symbol/keyword text. Returns UNKNOWN
* if the text isn't found. You can filter finds on a type.
*/
public static int lookup( String text, int filter ) {
int type = UNKNOWN;
if( LOOKUP.containsKey(text) ) {
type = LOOKUP.get(text);
if( filter != UNKNOWN && !ofType(type, filter) ) {
type = UNKNOWN;
}
}
return type;
}
/**
* Returns the type for the specified keyword text. Returns UNKNOWN
* if the text isn't found.
*/
public static int lookupKeyword( String text ) {
return lookup( text, KEYWORD );
}
/**
* Returns the type for the specified symbol text. Returns UNKNOWN
* if the text isn't found.
*/
public static int lookupSymbol( String text ) {
return lookup( text, SYMBOL );
}
/**
* Returns the text for the specified type. Returns "" if the
* text isn't found.
*/
public static String getText( int type ) {
String text = "";
if( TEXTS.containsKey(type) ) {
text = TEXTS.get( type );
}
return text;
}
/**
* Adds a element to the TEXTS and LOOKUP.
*/
private static void addTranslation( String text, int type ) {
TEXTS.put( type, text );
LOOKUP.put( text, type );
}
/**
* Adds a element to the KEYWORDS, TEXTS and LOOKUP.
*/
private static void addKeyword( String text, int type ) {
KEYWORDS.add(text);
addTranslation(text, type);
}
static {
//
// SYMBOLS
addTranslation( "\n" , NEWLINE );
addTranslation( "{" , LEFT_CURLY_BRACE );
addTranslation( "}" , RIGHT_CURLY_BRACE );
addTranslation( "[" , LEFT_SQUARE_BRACKET );
addTranslation( "]" , RIGHT_SQUARE_BRACKET );
addTranslation( "(" , LEFT_PARENTHESIS );
addTranslation( ")" , RIGHT_PARENTHESIS );
addTranslation( "." , DOT );
addTranslation( ".." , DOT_DOT );
addTranslation( "..." , DOT_DOT_DOT );
addTranslation( "->" , NAVIGATE );
addTranslation( "=~" , FIND_REGEX );
addTranslation( "==~" , MATCH_REGEX );
addTranslation( "~" , REGEX_PATTERN );
addTranslation( "=" , EQUAL );
addTranslation( "!=" , COMPARE_NOT_EQUAL );
addTranslation( "===" , COMPARE_IDENTICAL );
addTranslation( "!==" , COMPARE_NOT_IDENTICAL );
addTranslation( "==" , COMPARE_EQUAL );
addTranslation( "<" , COMPARE_LESS_THAN );
addTranslation( "<=" , COMPARE_LESS_THAN_EQUAL );
addTranslation( ">" , COMPARE_GREATER_THAN );
addTranslation( ">=" , COMPARE_GREATER_THAN_EQUAL );
addTranslation( "<=>" , COMPARE_TO );
addTranslation( "!" , NOT );
addTranslation( "||" , LOGICAL_OR );
addTranslation( "&&" , LOGICAL_AND );
addTranslation( "||=" , LOGICAL_OR_EQUAL );
addTranslation( "&&=" , LOGICAL_AND_EQUAL );
addTranslation( "+" , PLUS );
addTranslation( "-" , MINUS );
addTranslation( "*" , MULTIPLY );
addTranslation( "/" , DIVIDE );
addTranslation( "\\" , INTDIV );
addTranslation( "%" , MOD );
addTranslation( "**" , POWER );
addTranslation( "+=" , PLUS_EQUAL );
addTranslation( "-=" , MINUS_EQUAL );
addTranslation( "*=" , MULTIPLY_EQUAL );
addTranslation( "/=" , DIVIDE_EQUAL );
addTranslation( "\\=" , INTDIV_EQUAL );
addTranslation( "%=" , MOD_EQUAL );
addTranslation( "**=" , POWER_EQUAL );
addTranslation( "++" , PLUS_PLUS );
addTranslation( "--" , MINUS_MINUS );
addTranslation( "<<" , LEFT_SHIFT );
addTranslation( ">>" , RIGHT_SHIFT );
addTranslation( ">>>" , RIGHT_SHIFT_UNSIGNED );
addTranslation( "<<=" , LEFT_SHIFT_EQUAL );
addTranslation( ">>=" , RIGHT_SHIFT_EQUAL );
addTranslation( ">>>=" , RIGHT_SHIFT_UNSIGNED_EQUAL );
addTranslation( "&" , BITWISE_AND );
addTranslation( "^" , BITWISE_XOR );
addTranslation( "|=" , BITWISE_OR_EQUAL );
addTranslation( "&=" , BITWISE_AND_EQUAL );
addTranslation( "^=" , BITWISE_XOR_EQUAL );
addTranslation( "," , COMMA );
addTranslation( ":" , COLON );
addTranslation( ";" , SEMICOLON );
addTranslation( "?" , QUESTION );
addTranslation( "|" , PIPE );
addTranslation( "${}" , GSTRING_EXPRESSION_START );
//
// Keywords
addKeyword( "abstract" , KEYWORD_ABSTRACT );
addKeyword( "as" , KEYWORD_AS );
addKeyword( "assert" , KEYWORD_ASSERT );
addKeyword( "break" , KEYWORD_BREAK );
addKeyword( "case" , KEYWORD_CASE );
addKeyword( "catch" , KEYWORD_CATCH );
addKeyword( "class" , KEYWORD_CLASS );
addKeyword( "const" , KEYWORD_CONST );
addKeyword( "continue" , KEYWORD_CONTINUE );
addKeyword( "def" , KEYWORD_DEF );
addKeyword( "defmacro" , KEYWORD_DEF ); // xxx br defmacro
addKeyword( "default" , KEYWORD_DEFAULT );
addKeyword( "do" , KEYWORD_DO );
addKeyword( "else" , KEYWORD_ELSE );
addKeyword( "extends" , KEYWORD_EXTENDS );
addKeyword( "final" , KEYWORD_FINAL );
addKeyword( "finally" , KEYWORD_FINALLY );
addKeyword( "for" , KEYWORD_FOR );
addKeyword( "goto" , KEYWORD_GOTO );
addKeyword( "if" , KEYWORD_IF );
addKeyword( "in" , KEYWORD_IN );
addKeyword( "implements" , KEYWORD_IMPLEMENTS );
addKeyword( "import" , KEYWORD_IMPORT );
addKeyword( "instanceof" , KEYWORD_INSTANCEOF );
addKeyword( "interface" , KEYWORD_INTERFACE );
addKeyword( "mixin" , KEYWORD_MIXIN );
addKeyword( "native" , KEYWORD_NATIVE );
addKeyword( "new" , KEYWORD_NEW );
addKeyword( "package" , KEYWORD_PACKAGE );
addKeyword( "private" , KEYWORD_PRIVATE );
addKeyword( "property" , KEYWORD_PROPERTY );
addKeyword( "protected" , KEYWORD_PROTECTED );
addKeyword( "public" , KEYWORD_PUBLIC );
addKeyword( "return" , KEYWORD_RETURN );
addKeyword( "static" , KEYWORD_STATIC );
addKeyword( "super" , KEYWORD_SUPER );
addKeyword( "switch" , KEYWORD_SWITCH );
addKeyword( "synchronized", KEYWORD_SYNCHRONIZED );
addKeyword( "this" , KEYWORD_THIS );
addKeyword( "throw" , KEYWORD_THROW );
addKeyword( "throws" , KEYWORD_THROWS );
addKeyword( "transient" , KEYWORD_TRANSIENT );
addKeyword( "try" , KEYWORD_TRY );
addKeyword( "volatile" , KEYWORD_VOLATILE );
addKeyword( "while" , KEYWORD_WHILE );
addKeyword( "true" , KEYWORD_TRUE );
addKeyword( "false" , KEYWORD_FALSE );
addKeyword( "null" , KEYWORD_NULL );
addKeyword( "void" , KEYWORD_VOID );
addKeyword( "boolean" , KEYWORD_BOOLEAN );
addKeyword( "byte" , KEYWORD_BYTE );
addKeyword( "int" , KEYWORD_INT );
addKeyword( "short" , KEYWORD_SHORT );
addKeyword( "long" , KEYWORD_LONG );
addKeyword( "float" , KEYWORD_FLOAT );
addKeyword( "double" , KEYWORD_DOUBLE );
addKeyword( "char" , KEYWORD_CHAR );
}
//---------------------------------------------------------------------------
// DESCRIPTIONS
private static final Map DESCRIPTIONS = new HashMap();
/**
* Gets the description for the specified type.
*/
public static String getDescription( int type ) {
if (DESCRIPTIONS.containsKey(type)) {
return DESCRIPTIONS.get(type);
}
return "<>";
}
/**
* Adds a description to the set.
*/
private static void addDescription(int type, String description) {
if (description.startsWith("<") && description.endsWith(">")) {
DESCRIPTIONS.put(type, description);
}
else {
DESCRIPTIONS.put(type, '"' + description + '"');
}
}
static {
Iterator iterator = LOOKUP.keySet().iterator();
while( iterator.hasNext() )
{
String text = iterator.next();
int key = LOOKUP.get(text);
addDescription( key, text );
}
addDescription( NEWLINE , "" );
addDescription( PREFIX_PLUS_PLUS , "" );
addDescription( POSTFIX_PLUS_PLUS , "" );
addDescription( PREFIX_MINUS_MINUS , "" );
addDescription( POSTFIX_MINUS_MINUS , "" );
addDescription( PREFIX_PLUS , "" );
addDescription( PREFIX_MINUS , "" );
addDescription( STRING , "" );
addDescription( IDENTIFIER , "" );
addDescription( INTEGER_NUMBER , "" );
addDescription( DECIMAL_NUMBER , "" );
addDescription( SYNTH_COMPILATION_UNIT , "" );
addDescription( SYNTH_CLASS , "" );
addDescription( SYNTH_INTERFACE , "" );
addDescription( SYNTH_MIXIN , "" );
addDescription( SYNTH_METHOD , "" );
addDescription( SYNTH_METHOD_CALL , "" );
addDescription( SYNTH_PROPERTY , "" );
addDescription( SYNTH_PARAMETER_DECLARATION , "" );
addDescription( SYNTH_LIST , "" );
addDescription( SYNTH_MAP , "