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Rhino JavaScript Java Library Source Code
Rhino JavaScript Java Library is an open-source implementation of JavaScript written entirely in Java.
Rhino JavaScript Java Library Source Code files are provided in binary package (rhino-1.7.14.zip).
You can also browse the source code below:
✍: FYIcenter.com
⏎ org/mozilla/javascript/Node.java
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ package org.mozilla.javascript; import java.math.BigInteger; import java.util.Iterator; import java.util.NoSuchElementException; import org.mozilla.javascript.ast.Comment; import org.mozilla.javascript.ast.FunctionNode; import org.mozilla.javascript.ast.Jump; import org.mozilla.javascript.ast.Name; import org.mozilla.javascript.ast.NumberLiteral; import org.mozilla.javascript.ast.Scope; import org.mozilla.javascript.ast.ScriptNode; /** * This class implements the root of the intermediate representation. * * @author Norris Boyd * @author Mike McCabe */ public class Node implements Iterable<Node> { public static final int FUNCTION_PROP = 1, LOCAL_PROP = 2, LOCAL_BLOCK_PROP = 3, REGEXP_PROP = 4, CASEARRAY_PROP = 5, // the following properties are defined and manipulated by the // optimizer - // TARGETBLOCK_PROP - the block referenced by a branch node // VARIABLE_PROP - the variable referenced by a BIND or NAME node // ISNUMBER_PROP - this node generates code on Number children and // delivers a Number result (as opposed to Objects) // DIRECTCALL_PROP - this call node should emit code to test the function // object against the known class and call direct if it // matches. TARGETBLOCK_PROP = 6, VARIABLE_PROP = 7, ISNUMBER_PROP = 8, DIRECTCALL_PROP = 9, SPECIALCALL_PROP = 10, SKIP_INDEXES_PROP = 11, // array of skipped indexes of array literal OBJECT_IDS_PROP = 12, // array of properties for object literal INCRDECR_PROP = 13, // pre or post type of increment/decrement CATCH_SCOPE_PROP = 14, // index of catch scope block in catch LABEL_ID_PROP = 15, // label id: code generation uses it MEMBER_TYPE_PROP = 16, // type of element access operation NAME_PROP = 17, // property name CONTROL_BLOCK_PROP = 18, // flags a control block that can drop off PARENTHESIZED_PROP = 19, // expression is parenthesized GENERATOR_END_PROP = 20, DESTRUCTURING_ARRAY_LENGTH = 21, DESTRUCTURING_NAMES = 22, DESTRUCTURING_PARAMS = 23, JSDOC_PROP = 24, EXPRESSION_CLOSURE_PROP = 25, // JS 1.8 expression closure pseudo-return SHORTHAND_PROPERTY_NAME = 26, ARROW_FUNCTION_PROP = 27, TEMPLATE_LITERAL_PROP = 28, LAST_PROP = 28; // values of ISNUMBER_PROP to specify // which of the children are Number types public static final int BOTH = 0, LEFT = 1, RIGHT = 2; public static final int // values for SPECIALCALL_PROP NON_SPECIALCALL = 0, SPECIALCALL_EVAL = 1, SPECIALCALL_WITH = 2; public static final int // flags for INCRDECR_PROP DECR_FLAG = 0x1, POST_FLAG = 0x2; public static final int // flags for MEMBER_TYPE_PROP PROPERTY_FLAG = 0x1, // property access: element is valid name ATTRIBUTE_FLAG = 0x2, // x.@y or x..@y DESCENDANTS_FLAG = 0x4; // x..y or x..@i private static class PropListItem { PropListItem next; int type; int intValue; Object objectValue; } public Node(int nodeType) { type = nodeType; } public Node(int nodeType, Node child) { type = nodeType; first = last = child; child.next = null; } public Node(int nodeType, Node left, Node right) { type = nodeType; first = left; last = right; left.next = right; right.next = null; } public Node(int nodeType, Node left, Node mid, Node right) { type = nodeType; first = left; last = right; left.next = mid; mid.next = right; right.next = null; } public Node(int nodeType, int line) { type = nodeType; lineno = line; } public Node(int nodeType, Node child, int line) { this(nodeType, child); lineno = line; } public Node(int nodeType, Node left, Node right, int line) { this(nodeType, left, right); lineno = line; } public Node(int nodeType, Node left, Node mid, Node right, int line) { this(nodeType, left, mid, right); lineno = line; } public static Node newNumber(double number) { NumberLiteral n = new NumberLiteral(); n.setNumber(number); return n; } public static Node newString(String str) { return newString(Token.STRING, str); } public static Node newString(int type, String str) { Name name = new Name(); name.setIdentifier(str); name.setType(type); return name; } public int getType() { return type; } /** Sets the node type and returns this node. */ public Node setType(int type) { this.type = type; return this; } /** * Gets the JsDoc comment string attached to this node. * * @return the comment string or {@code null} if no JsDoc is attached to this node */ public String getJsDoc() { Comment comment = getJsDocNode(); if (comment != null) { return comment.getValue(); } return null; } /** * Gets the JsDoc Comment object attached to this node. * * @return the Comment or {@code null} if no JsDoc is attached to this node */ public Comment getJsDocNode() { return (Comment) getProp(JSDOC_PROP); } /** Sets the JsDoc comment string attached to this node. */ public void setJsDocNode(Comment jsdocNode) { putProp(JSDOC_PROP, jsdocNode); } public boolean hasChildren() { return first != null; } public Node getFirstChild() { return first; } public Node getLastChild() { return last; } public Node getNext() { return next; } public Node getChildBefore(Node child) { if (child == first) return null; Node n = first; while (n.next != child) { n = n.next; if (n == null) throw new RuntimeException("node is not a child"); } return n; } public Node getLastSibling() { Node n = this; while (n.next != null) { n = n.next; } return n; } public void addChildToFront(Node child) { child.next = first; first = child; if (last == null) { last = child; } } public void addChildToBack(Node child) { child.next = null; if (last == null) { first = last = child; return; } last.next = child; last = child; } public void addChildrenToFront(Node children) { Node lastSib = children.getLastSibling(); lastSib.next = first; first = children; if (last == null) { last = lastSib; } } public void addChildrenToBack(Node children) { if (last != null) { last.next = children; } last = children.getLastSibling(); if (first == null) { first = children; } } /** Add 'child' before 'node'. */ public void addChildBefore(Node newChild, Node node) { if (newChild.next != null) throw new RuntimeException("newChild had siblings in addChildBefore"); if (first == node) { newChild.next = first; first = newChild; return; } Node prev = getChildBefore(node); addChildAfter(newChild, prev); } /** Add 'child' after 'node'. */ public void addChildAfter(Node newChild, Node node) { if (newChild.next != null) throw new RuntimeException("newChild had siblings in addChildAfter"); newChild.next = node.next; node.next = newChild; if (last == node) last = newChild; } public void removeChild(Node child) { Node prev = getChildBefore(child); if (prev == null) first = first.next; else prev.next = child.next; if (child == last) last = prev; child.next = null; } public void replaceChild(Node child, Node newChild) { newChild.next = child.next; if (child == first) { first = newChild; } else { Node prev = getChildBefore(child); prev.next = newChild; } if (child == last) last = newChild; child.next = null; } public void replaceChildAfter(Node prevChild, Node newChild) { Node child = prevChild.next; newChild.next = child.next; prevChild.next = newChild; if (child == last) last = newChild; child.next = null; } public void removeChildren() { first = last = null; } private static final Node NOT_SET = new Node(Token.ERROR); /** * Iterates over the children of this Node. Supports child removal. Not thread-safe. If anyone * changes the child list before the iterator finishes, the results are undefined and probably * bad. */ public class NodeIterator implements Iterator<Node> { private Node cursor; // points to node to be returned next private Node prev = NOT_SET; private Node prev2; private boolean removed = false; public NodeIterator() { cursor = Node.this.first; } @Override public boolean hasNext() { return cursor != null; } @Override public Node next() { if (cursor == null) { throw new NoSuchElementException(); } removed = false; prev2 = prev; prev = cursor; cursor = cursor.next; return prev; } @Override public void remove() { if (prev == NOT_SET) { throw new IllegalStateException("next() has not been called"); } if (removed) { throw new IllegalStateException("remove() already called for current element"); } if (prev == first) { first = prev.next; } else if (prev == last) { prev2.next = null; last = prev2; } else { prev2.next = cursor; } } } /** Returns an {@link java.util.Iterator} over the node's children. */ @Override public Iterator<Node> iterator() { return new NodeIterator(); } private static final String propToString(int propType) { if (Token.printTrees) { // If Context.printTrees is false, the compiler // can remove all these strings. switch (propType) { case FUNCTION_PROP: return "function"; case LOCAL_PROP: return "local"; case LOCAL_BLOCK_PROP: return "local_block"; case REGEXP_PROP: return "regexp"; case CASEARRAY_PROP: return "casearray"; case TARGETBLOCK_PROP: return "targetblock"; case VARIABLE_PROP: return "variable"; case ISNUMBER_PROP: return "isnumber"; case DIRECTCALL_PROP: return "directcall"; case SPECIALCALL_PROP: return "specialcall"; case SKIP_INDEXES_PROP: return "skip_indexes"; case OBJECT_IDS_PROP: return "object_ids_prop"; case INCRDECR_PROP: return "incrdecr_prop"; case CATCH_SCOPE_PROP: return "catch_scope_prop"; case LABEL_ID_PROP: return "label_id_prop"; case MEMBER_TYPE_PROP: return "member_type_prop"; case NAME_PROP: return "name_prop"; case CONTROL_BLOCK_PROP: return "control_block_prop"; case PARENTHESIZED_PROP: return "parenthesized_prop"; case GENERATOR_END_PROP: return "generator_end"; case DESTRUCTURING_ARRAY_LENGTH: return "destructuring_array_length"; case DESTRUCTURING_NAMES: return "destructuring_names"; case DESTRUCTURING_PARAMS: return "destructuring_params"; case EXPRESSION_CLOSURE_PROP: return "expression_closure_prop"; case TEMPLATE_LITERAL_PROP: return "template_literal"; default: Kit.codeBug(); } } return null; } private PropListItem lookupProperty(int propType) { PropListItem x = propListHead; while (x != null && propType != x.type) { x = x.next; } return x; } private PropListItem ensureProperty(int propType) { PropListItem item = lookupProperty(propType); if (item == null) { item = new PropListItem(); item.type = propType; item.next = propListHead; propListHead = item; } return item; } public void removeProp(int propType) { PropListItem x = propListHead; if (x != null) { PropListItem prev = null; while (x.type != propType) { prev = x; x = x.next; if (x == null) { return; } } if (prev == null) { propListHead = x.next; } else { prev.next = x.next; } } } public Object getProp(int propType) { PropListItem item = lookupProperty(propType); if (item == null) { return null; } return item.objectValue; } public int getIntProp(int propType, int defaultValue) { PropListItem item = lookupProperty(propType); if (item == null) { return defaultValue; } return item.intValue; } public int getExistingIntProp(int propType) { PropListItem item = lookupProperty(propType); if (item == null) { Kit.codeBug(); } return item.intValue; } public void putProp(int propType, Object prop) { if (prop == null) { removeProp(propType); } else { PropListItem item = ensureProperty(propType); item.objectValue = prop; } } public void putIntProp(int propType, int prop) { PropListItem item = ensureProperty(propType); item.intValue = prop; } /** * Return the line number recorded for this node. * * @return the line number */ public int getLineno() { return lineno; } public void setLineno(int lineno) { this.lineno = lineno; } /** Can only be called when <code>getType() == Token.NUMBER</code> */ public final double getDouble() { return ((NumberLiteral) this).getNumber(); } public final void setDouble(double number) { ((NumberLiteral) this).setNumber(number); } /** Can only be called when <code>getType() == Token.BIGINT</code> */ public BigInteger getBigInt() { throw new UnsupportedOperationException("Can only be called when Token.BIGINT"); } public void setBigInt(BigInteger bigInt) { throw new UnsupportedOperationException("Can only be called when Token.BIGINT"); } /** Can only be called when node has String context. */ public final String getString() { return ((Name) this).getIdentifier(); } /** Can only be called when node has String context. */ public final void setString(String s) { if (s == null) Kit.codeBug(); ((Name) this).setIdentifier(s); } /** Can only be called when node has String context. */ public Scope getScope() { return ((Name) this).getScope(); } /** Can only be called when node has String context. */ public void setScope(Scope s) { if (s == null) Kit.codeBug(); if (!(this instanceof Name)) { throw Kit.codeBug(); } ((Name) this).setScope(s); } public static Node newTarget() { return new Node(Token.TARGET); } public final int labelId() { if ((type != Token.TARGET) && (type != Token.YIELD) && (type != Token.YIELD_STAR)) { Kit.codeBug(); } return getIntProp(LABEL_ID_PROP, -1); } public void labelId(int labelId) { if ((type != Token.TARGET) && (type != Token.YIELD) && (type != Token.YIELD_STAR)) { Kit.codeBug(); } putIntProp(LABEL_ID_PROP, labelId); } /** * Does consistent-return analysis on the function body when strict mode is enabled. * * <p>function (x) { return (x+1) } is ok, but function (x) { if (x < 0) return (x+1); } is * not becuase the function can potentially return a value when the condition is satisfied and * if not, the function does not explicitly return value. * * <p>This extends to checking mismatches such as "return" and "return <value>" used in the same * function. Warnings are not emitted if inconsistent returns exist in code that can be * statically shown to be unreachable. Ex. * * <pre>function (x) { while (true) { ... if (..) { return value } ... } } * </pre> * * emits no warning. However if the loop had a break statement, then a warning would be emitted. * * <p>The consistency analysis looks at control structures such as loops, ifs, switch, * try-catch-finally blocks, examines the reachable code paths and warns the user about an * inconsistent set of termination possibilities. * * <p>Caveat: Since the parser flattens many control structures into almost straight-line code * with gotos, it makes such analysis hard. Hence this analyser is written to taken advantage of * patterns of code generated by the parser (for loops, try blocks and such) and does not do a * full control flow analysis of the gotos and break/continue statements. Future changes to the * parser will affect this analysis. */ /** * These flags enumerate the possible ways a statement/function can terminate. These flags are * used by endCheck() and by the Parser to detect inconsistent return usage. * * <p>END_UNREACHED is reserved for code paths that are assumed to always be able to execute * (example: throw, continue) * * <p>END_DROPS_OFF indicates if the statement can transfer control to the next one. Statement * such as return dont. A compound statement may have some branch that drops off control to the * next statement. * * <p>END_RETURNS indicates that the statement can return (without arguments) END_RETURNS_VALUE * indicates that the statement can return a value. * * <p>A compound statement such as if (condition) { return value; } Will be detected as * (END_DROPS_OFF | END_RETURN_VALUE) by endCheck() */ public static final int END_UNREACHED = 0; public static final int END_DROPS_OFF = 1; public static final int END_RETURNS = 2; public static final int END_RETURNS_VALUE = 4; public static final int END_YIELDS = 8; /** * Checks that every return usage in a function body is consistent with the requirements of * strict-mode. * * @return true if the function satisfies strict mode requirement. */ public boolean hasConsistentReturnUsage() { int n = endCheck(); return (n & END_RETURNS_VALUE) == 0 || (n & (END_DROPS_OFF | END_RETURNS | END_YIELDS)) == 0; } /** * Returns in the then and else blocks must be consistent with each other. If there is no else * block, then the return statement can fall through. * * @return logical OR of END_* flags */ private int endCheckIf() { Node th, el; int rv = END_UNREACHED; th = next; el = ((Jump) this).target; rv = th.endCheck(); if (el != null) rv |= el.endCheck(); else rv |= END_DROPS_OFF; return rv; } /** * Consistency of return statements is checked between the case statements. If there is no * default, then the switch can fall through. If there is a default,we check to see if all code * paths in the default return or if there is a code path that can fall through. * * @return logical OR of END_* flags */ private int endCheckSwitch() { int rv = END_UNREACHED; // examine the cases // for (n = first.next; n != null; n = n.next) // { // if (n.type == Token.CASE) { // rv |= ((Jump)n).target.endCheck(); // } else // break; // } // // we don't care how the cases drop into each other // rv &= ~END_DROPS_OFF; // // examine the default // n = ((Jump)this).getDefault(); // if (n != null) // rv |= n.endCheck(); // else // rv |= END_DROPS_OFF; // // remove the switch block // rv |= getIntProp(CONTROL_BLOCK_PROP, END_UNREACHED); return rv; } /** * If the block has a finally, return consistency is checked in the finally block. If all code * paths in the finally returns, then the returns in the try-catch blocks don't matter. If there * is a code path that does not return or if there is no finally block, the returns of the try * and catch blocks are checked for mismatch. * * @return logical OR of END_* flags */ private int endCheckTry() { int rv = END_UNREACHED; // a TryStatement isn't a jump - needs rewriting // check the finally if it exists // n = ((Jump)this).getFinally(); // if(n != null) { // rv = n.next.first.endCheck(); // } else { // rv = END_DROPS_OFF; // } // // if the finally block always returns, then none of the returns // // in the try or catch blocks matter // if ((rv & END_DROPS_OFF) != 0) { // rv &= ~END_DROPS_OFF; // // examine the try block // rv |= first.endCheck(); // // check each catch block // n = ((Jump)this).target; // if (n != null) // { // // point to the first catch_scope // for (n = n.next.first; n != null; n = n.next.next) // { // // check the block of user code in the catch_scope // rv |= n.next.first.next.first.endCheck(); // } // } // } return rv; } /** * Return statement in the loop body must be consistent. The default assumption for any kind of * a loop is that it will eventually terminate. The only exception is a loop with a constant * true condition. Code that follows such a loop is examined only if one can statically * determine that there is a break out of the loop. * * <pre> * for(<> ; <>; <>) {} * for(<> in <> ) {} * while(<>) { } * do { } while(<>) * </pre> * * @return logical OR of END_* flags */ private int endCheckLoop() { Node n; int rv = END_UNREACHED; // To find the loop body, we look at the second to last node of the // loop node, which should be the predicate that the loop should // satisfy. // The target of the predicate is the loop-body for all 4 kinds of // loops. for (n = first; n.next != last; n = n.next) { /* skip */ } if (n.type != Token.IFEQ) return END_DROPS_OFF; // The target's next is the loop body block rv = ((Jump) n).target.next.endCheck(); // check to see if the loop condition is true if (n.first.type == Token.TRUE) rv &= ~END_DROPS_OFF; // look for effect of breaks rv |= getIntProp(CONTROL_BLOCK_PROP, END_UNREACHED); return rv; } /** * A general block of code is examined statement by statement. If any statement (even compound * ones) returns in all branches, then subsequent statements are not examined. * * @return logical OR of END_* flags */ private int endCheckBlock() { Node n; int rv = END_DROPS_OFF; // check each statment and if the statement can continue onto the next // one, then check the next statement for (n = first; ((rv & END_DROPS_OFF) != 0) && n != null; n = n.next) { rv &= ~END_DROPS_OFF; rv |= n.endCheck(); } return rv; } /** * A labelled statement implies that there maybe a break to the label. The function processes * the labelled statement and then checks the CONTROL_BLOCK_PROP property to see if there is * ever a break to the particular label. * * @return logical OR of END_* flags */ private int endCheckLabel() { int rv = END_UNREACHED; rv = next.endCheck(); rv |= getIntProp(CONTROL_BLOCK_PROP, END_UNREACHED); return rv; } /** * When a break is encountered annotate the statement being broken out of by setting its * CONTROL_BLOCK_PROP property. * * @return logical OR of END_* flags */ private int endCheckBreak() { Node n = ((Jump) this).getJumpStatement(); n.putIntProp(CONTROL_BLOCK_PROP, END_DROPS_OFF); return END_UNREACHED; } /** * endCheck() examines the body of a function, doing a basic reachability analysis and returns a * combination of flags END_* flags that indicate how the function execution can terminate. * These constitute only the pessimistic set of termination conditions. It is possible that at * runtime certain code paths will never be actually taken. Hence this analysis will flag errors * in cases where there may not be errors. * * @return logical OR of END_* flags */ private int endCheck() { switch (type) { case Token.BREAK: return endCheckBreak(); case Token.EXPR_VOID: if (this.first != null) return first.endCheck(); return END_DROPS_OFF; case Token.YIELD: case Token.YIELD_STAR: return END_YIELDS; case Token.CONTINUE: case Token.THROW: return END_UNREACHED; case Token.RETURN: if (this.first != null) return END_RETURNS_VALUE; return END_RETURNS; case Token.TARGET: if (next != null) return next.endCheck(); return END_DROPS_OFF; case Token.LOOP: return endCheckLoop(); case Token.LOCAL_BLOCK: case Token.BLOCK: // there are several special kinds of blocks if (first == null) return END_DROPS_OFF; switch (first.type) { case Token.LABEL: return first.endCheckLabel(); case Token.IFNE: return first.endCheckIf(); case Token.SWITCH: return first.endCheckSwitch(); case Token.TRY: return first.endCheckTry(); default: return endCheckBlock(); } default: return END_DROPS_OFF; } } public boolean hasSideEffects() { switch (type) { case Token.EXPR_VOID: case Token.COMMA: if (last != null) return last.hasSideEffects(); return true; case Token.HOOK: if (first == null || first.next == null || first.next.next == null) Kit.codeBug(); return first.next.hasSideEffects() && first.next.next.hasSideEffects(); case Token.AND: case Token.OR: if (first == null || last == null) Kit.codeBug(); return first.hasSideEffects() || last.hasSideEffects(); case Token.ERROR: // Avoid cascaded error messages case Token.EXPR_RESULT: case Token.ASSIGN: case Token.ASSIGN_ADD: case Token.ASSIGN_SUB: case Token.ASSIGN_MUL: case Token.ASSIGN_DIV: case Token.ASSIGN_MOD: case Token.ASSIGN_BITOR: case Token.ASSIGN_BITXOR: case Token.ASSIGN_BITAND: case Token.ASSIGN_LSH: case Token.ASSIGN_RSH: case Token.ASSIGN_URSH: case Token.ENTERWITH: case Token.LEAVEWITH: case Token.RETURN: case Token.GOTO: case Token.IFEQ: case Token.IFNE: case Token.NEW: case Token.DELPROP: case Token.SETNAME: case Token.SETPROP: case Token.SETELEM: case Token.CALL: case Token.THROW: case Token.RETHROW: case Token.SETVAR: case Token.CATCH_SCOPE: case Token.RETURN_RESULT: case Token.SET_REF: case Token.DEL_REF: case Token.REF_CALL: case Token.TRY: case Token.SEMI: case Token.INC: case Token.DEC: case Token.IF: case Token.ELSE: case Token.SWITCH: case Token.WHILE: case Token.DO: case Token.FOR: case Token.BREAK: case Token.CONTINUE: case Token.VAR: case Token.CONST: case Token.LET: case Token.LETEXPR: case Token.WITH: case Token.WITHEXPR: case Token.CATCH: case Token.FINALLY: case Token.BLOCK: case Token.LABEL: case Token.TARGET: case Token.LOOP: case Token.JSR: case Token.SETPROP_OP: case Token.SETELEM_OP: case Token.LOCAL_BLOCK: case Token.SET_REF_OP: case Token.YIELD: case Token.YIELD_STAR: return true; default: return false; } } /** * Recursively unlabel every TARGET or YIELD node in the tree. * * <p>This is used and should only be used for inlining finally blocks where jsr instructions * used to be. It is somewhat hackish, but implementing a clone() operation would take much, * much more effort. * * <p>This solution works for inlining finally blocks because you should never be writing any * given block to the class file simultaneously. Therefore, an unlabeling will never occur in * the middle of a block. */ public void resetTargets() { if (type == Token.FINALLY) { resetTargets_r(); } else { Kit.codeBug(); } } private void resetTargets_r() { if (type == Token.TARGET || type == Token.YIELD || type == Token.YIELD_STAR) { labelId(-1); } Node child = first; while (child != null) { child.resetTargets_r(); child = child.next; } } @Override public String toString() { if (Token.printTrees) { StringBuilder sb = new StringBuilder(); toString(new ObjToIntMap(), sb); return sb.toString(); } return String.valueOf(type); } private void toString(ObjToIntMap printIds, StringBuilder sb) { if (Token.printTrees) { sb.append(Token.name(type)); if (this instanceof Name) { sb.append(' '); sb.append(getString()); Scope scope = getScope(); if (scope != null) { sb.append("[scope: "); appendPrintId(scope, printIds, sb); sb.append("]"); } } else if (this instanceof Scope) { if (this instanceof ScriptNode) { ScriptNode sof = (ScriptNode) this; if (this instanceof FunctionNode) { FunctionNode fn = (FunctionNode) this; sb.append(' '); sb.append(fn.getName()); } sb.append(" [source name: "); sb.append(sof.getSourceName()); sb.append("] [encoded source length: "); sb.append(sof.getEncodedSourceEnd() - sof.getEncodedSourceStart()); sb.append("] [base line: "); sb.append(sof.getBaseLineno()); sb.append("] [end line: "); sb.append(sof.getEndLineno()); sb.append(']'); } if (((Scope) this).getSymbolTable() != null) { sb.append(" [scope "); appendPrintId(this, printIds, sb); sb.append(": "); Iterator<String> iter = ((Scope) this).getSymbolTable().keySet().iterator(); while (iter.hasNext()) { sb.append(iter.next()); sb.append(" "); } sb.append("]"); } } else if (this instanceof Jump) { Jump jump = (Jump) this; if (type == Token.BREAK || type == Token.CONTINUE) { sb.append(" [label: "); appendPrintId(jump.getJumpStatement(), printIds, sb); sb.append(']'); } else if (type == Token.TRY) { Node catchNode = jump.target; Node finallyTarget = jump.getFinally(); if (catchNode != null) { sb.append(" [catch: "); appendPrintId(catchNode, printIds, sb); sb.append(']'); } if (finallyTarget != null) { sb.append(" [finally: "); appendPrintId(finallyTarget, printIds, sb); sb.append(']'); } } else if (type == Token.LABEL || type == Token.LOOP || type == Token.SWITCH) { sb.append(" [break: "); appendPrintId(jump.target, printIds, sb); sb.append(']'); if (type == Token.LOOP) { sb.append(" [continue: "); appendPrintId(jump.getContinue(), printIds, sb); sb.append(']'); } } else { sb.append(" [target: "); appendPrintId(jump.target, printIds, sb); sb.append(']'); } } else if (type == Token.NUMBER) { sb.append(' '); sb.append(getDouble()); } else if (type == Token.BIGINT) { sb.append(' '); sb.append(getBigInt().toString()); } else if (type == Token.TARGET) { sb.append(' '); appendPrintId(this, printIds, sb); } if (lineno != -1) { sb.append(' '); sb.append(lineno); } for (PropListItem x = propListHead; x != null; x = x.next) { int type = x.type; sb.append(" ["); sb.append(propToString(type)); sb.append(": "); String value; switch (type) { case TARGETBLOCK_PROP: // can't add this as it recurses value = "target block property"; break; case LOCAL_BLOCK_PROP: // can't add this as it is dull value = "last local block"; break; case ISNUMBER_PROP: switch (x.intValue) { case BOTH: value = "both"; break; case RIGHT: value = "right"; break; case LEFT: value = "left"; break; default: throw Kit.codeBug(); } break; case SPECIALCALL_PROP: switch (x.intValue) { case SPECIALCALL_EVAL: value = "eval"; break; case SPECIALCALL_WITH: value = "with"; break; default: // NON_SPECIALCALL should not be stored throw Kit.codeBug(); } break; case OBJECT_IDS_PROP: { Object[] a = (Object[]) x.objectValue; value = "["; for (int i = 0; i < a.length; i++) { value += a[i].toString(); if (i + 1 < a.length) value += ", "; } value += "]"; break; } default: Object obj = x.objectValue; if (obj != null) { value = obj.toString(); } else { value = String.valueOf(x.intValue); } break; } sb.append(value); sb.append(']'); } } } public String toStringTree(ScriptNode treeTop) { if (Token.printTrees) { StringBuilder sb = new StringBuilder(); toStringTreeHelper(treeTop, this, null, 0, sb); return sb.toString(); } return null; } private static void toStringTreeHelper( ScriptNode treeTop, Node n, ObjToIntMap printIds, int level, StringBuilder sb) { if (Token.printTrees) { if (printIds == null) { printIds = new ObjToIntMap(); generatePrintIds(treeTop, printIds); } for (int i = 0; i != level; ++i) { sb.append(" "); } n.toString(printIds, sb); sb.append('\n'); for (Node cursor = n.getFirstChild(); cursor != null; cursor = cursor.getNext()) { if (cursor.getType() == Token.FUNCTION) { int fnIndex = cursor.getExistingIntProp(Node.FUNCTION_PROP); FunctionNode fn = treeTop.getFunctionNode(fnIndex); toStringTreeHelper(fn, fn, null, level + 1, sb); } else { toStringTreeHelper(treeTop, cursor, printIds, level + 1, sb); } } } } private static void generatePrintIds(Node n, ObjToIntMap map) { if (Token.printTrees) { map.put(n, map.size()); for (Node cursor = n.getFirstChild(); cursor != null; cursor = cursor.getNext()) { generatePrintIds(cursor, map); } } } private static void appendPrintId(Node n, ObjToIntMap printIds, StringBuilder sb) { if (Token.printTrees) { if (n != null) { int id = printIds.get(n, -1); sb.append('#'); if (id != -1) { sb.append(id + 1); } else { sb.append("<not_available>"); } } } } protected int type = Token.ERROR; // type of the node, e.g. Token.NAME protected Node next; // next sibling protected Node first; // first element of a linked list of children protected Node last; // last element of a linked list of children protected int lineno = -1; /** * Linked list of properties. Since vast majority of nodes would have no more then 2 properties, * linked list saves memory and provides fast lookup. If this does not holds, propListHead can * be replaced by UintMap. */ protected PropListItem propListHead; }
⏎ org/mozilla/javascript/Node.java
Or download all of them as a single archive file:
File name: rhino-1.7.14-sources.jar File size: 1029165 bytes Release date: 2022-01-06 Download
⇒ Example code to Test rhino-runtime-1.7.14.jar
⇐ Download Rhino JavaScript Binary Package
2022-05-03, 34668👍, 1💬
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