Example usage for org.eclipse.jdt.internal.compiler.ast IntLiteral convertToMinValue

Introduction

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

Prototype

public IntLiteral convertToMinValue() 

Source Link

Usage

From source file:org.eclipse.jdt.internal.compiler.parser.Parser.java

License:Open Source License

protected void consumeUnaryExpression(int op) {
    // UnaryExpression ::= '+' PushPosition UnaryExpression
    // UnaryExpression ::= '-' PushPosition UnaryExpression
    // UnaryExpressionNotPlusMinus ::= '~' PushPosition UnaryExpression
    // UnaryExpressionNotPlusMinus ::= '!' PushPosition UnaryExpression

    //optimize the push/pop

    //handle manually the -2147483648 while it is not a real
    //computation of an - and 2147483648 (notice that 2147483648
    //is Integer.MAX_VALUE+1.....)
    //Same for -9223372036854775808L ............

    //this.intStack have the position of the operator

    Expression r, exp = this.expressionStack[this.expressionPtr];
    if (op == MINUS) {
        if (exp instanceof IntLiteral) {
            IntLiteral intLiteral = (IntLiteral) exp;
            IntLiteral convertToMinValue = intLiteral.convertToMinValue();
            if (convertToMinValue == intLiteral) {
                // not a min value literal so we convert it to an unary expression
                r = new UnaryExpression(exp, op);
            } else {
                r = convertToMinValue;//from  ww w .  jav  a2  s.co  m
            }
        } else if (exp instanceof LongLiteral) {
            LongLiteral longLiteral = (LongLiteral) exp;
            LongLiteral convertToMinValue = longLiteral.convertToMinValue();
            if (convertToMinValue == longLiteral) {
                // not a min value literal so we convert it to an unary expression
                r = new UnaryExpression(exp, op);
            } else {
                r = convertToMinValue;
            }
        } else {
            r = new UnaryExpression(exp, op);
        }
    } else {
        r = new UnaryExpression(exp, op);
    }
    r.sourceStart = this.intStack[this.intPtr--];
    r.sourceEnd = exp.sourceEnd;
    this.expressionStack[this.expressionPtr] = r;
}

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