Example usage for org.eclipse.jdt.internal.compiler.ast Expression Expression

Introduction

In this page you can find the example usage for org.eclipse.jdt.internal.compiler.ast Expression Expression.

Prototype

public Expression() 

Source Link

Usage

From source file:org.eclipse.objectteams.otdt.internal.core.compiler.util.AstGenerator.java

License:Open Source License

/**
 * Assemble an ifstatement with negated condition, that hides the branch instruction from the debugger,
 * even when stepping into the condition. 
 *///from   www.  j ava 2 s .  c  o  m
public IfStatement stealthIfNotStatement(final Expression condition, Statement thenStatement) {
    // mark step-over after the condition:
    Expression recordingCondition = new Expression() {
        public StringBuffer printExpression(int indent, StringBuffer output) {
            return condition.print(indent, output);
        }

        public TypeBinding resolveType(BlockScope scope) {
            return condition.resolveType(scope);
        }

        public void computeConversion(Scope scope, TypeBinding runtimeType, TypeBinding compileTimeType) {
            condition.computeConversion(scope, runtimeType, compileTimeType);
            this.constant = condition.constant;
            this.bits = condition.bits;
        }

        public Constant optimizedBooleanConstant() {
            this.constant = condition.optimizedBooleanConstant();
            this.bits = condition.bits;
            return this.constant;
        }

        public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo,
                boolean valueRequired) {
            return condition.analyseCode(currentScope, flowContext, flowInfo, valueRequired);
        }

        public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) {
            return condition.analyseCode(currentScope, flowContext, flowInfo);
        }

        public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
            condition.generateCode(currentScope, codeStream, valueRequired);
            // payload:
            codeStream.pcToSourceMap[codeStream.pcToSourceMapSize++] = codeStream.position;
            codeStream.pcToSourceMap[codeStream.pcToSourceMapSize++] = STEP_OVER_LINENUMBER;
        }
    };
    return new IfStatement(new UnaryExpression( // NOT
            recordingCondition, OperatorIds.NOT), thenStatement, this.sourceStart, this.sourceEnd);
}

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