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package sun.tools.tree;

import sun.tools.java.*;
import java.io.PrintStream;
import java.util.Hashtable;

WARNING: The contents of this source file are not part of any supported API. Code that depends on them does so at its own risk: they are subject to change or removal without notice.
/** * WARNING: The contents of this source file are not part of any * supported API. Code that depends on them does so at its own risk: * they are subject to change or removal without notice. */
public class UnaryExpression extends Expression { Expression right;
Constructor
/** * Constructor */
UnaryExpression(int op, long where, Type type, Expression right) { super(op, where, type); this.right = right; }
Order the expression based on precedence
/** * Order the expression based on precedence */
public Expression order() { if (precedence() > right.precedence()) { UnaryExpression e = (UnaryExpression)right; right = e.right; e.right = order(); return e; } return this; }
Select the type of the expression
/** * Select the type of the expression */
void selectType(Environment env, Context ctx, int tm) { throw new CompilerError("selectType: " + opNames[op]); }
Check a unary expression
/** * Check a unary expression */
public Vset checkValue(Environment env, Context ctx, Vset vset, Hashtable<Object, Object> exp) { vset = right.checkValue(env, ctx, vset, exp); int tm = right.type.getTypeMask(); selectType(env, ctx, tm); if (((tm & TM_ERROR) == 0) && type.isType(TC_ERROR)) { env.error(where, "invalid.arg", opNames[op]); } return vset; }
Check if constant
/** * Check if constant */
public boolean isConstant() { switch (op) { case POS: case NEG: case BITNOT: case NOT: case EXPR: case CONVERT: // generated inside of CastExpression return right.isConstant(); } return false; }
Evaluate
/** * Evaluate */
Expression eval(int a) { return this; } Expression eval(long a) { return this; } Expression eval(float a) { return this; } Expression eval(double a) { return this; } Expression eval(boolean a) { return this; } Expression eval(String a) { return this; } Expression eval() { switch (right.op) { case BYTEVAL: case CHARVAL: case SHORTVAL: case INTVAL: return eval(((IntegerExpression)right).value); case LONGVAL: return eval(((LongExpression)right).value); case FLOATVAL: return eval(((FloatExpression)right).value); case DOUBLEVAL: return eval(((DoubleExpression)right).value); case BOOLEANVAL: return eval(((BooleanExpression)right).value); case STRINGVAL: return eval(((StringExpression)right).value); } return this; }
Inline
/** * Inline */
public Expression inline(Environment env, Context ctx) { return right.inline(env, ctx); } public Expression inlineValue(Environment env, Context ctx) { right = right.inlineValue(env, ctx); try { return eval().simplify(); } catch (ArithmeticException e) { // Got rid of this error message. It isn't illegal to // have a program which does a constant division by // zero. We return `this' to make the compiler to // generate code here. // (bugs 4019304, 4089107). // // I am not positive that this catch is ever reached. // // env.error(where, "arithmetic.exception"); return this; } }
Create a copy of the expression for method inlining
/** * Create a copy of the expression for method inlining */
public Expression copyInline(Context ctx) { UnaryExpression e = (UnaryExpression)clone(); if (right != null) { e.right = right.copyInline(ctx); } return e; }
The cost of inlining this expression
/** * The cost of inlining this expression */
public int costInline(int thresh, Environment env, Context ctx) { return 1 + right.costInline(thresh, env, ctx); }
Print
/** * Print */
public void print(PrintStream out) { out.print("(" + opNames[op] + " "); right.print(out); out.print(")"); } }