Exemple #1
0
func (p *parser) asgmnt() ast.Expr {
	x := p.cond3()
	n := ast.Expr(x)
	if tok := p.peek(); isAssignOp(tok.Type) {
		p.next()
		y := p.asgmnt()
		op := &ast.BinaryExpr{
			Op: tok,
			X:  x,
			Y:  y,
		}
		n = op
	}
	return n
}
Exemple #2
0
// typExt checks if the current type has * or [] extensions to it
// to make them pointers or arrays.
func (c *checker) typExt(typ Type, e ast.Expr) Type {
	n := ast.Expr(e)
loop:
	for n != nil {
		pos := n.Span().Start
		switch m := n.(type) {
		case *ast.StarExpr:
			typ = NewPointer(typ, nil)
			n = m.X
		case *ast.ArrayType:
			var x operand
			var err error

			length := int64(-1)
			if m.Len != nil {
				c.constExpr(&x, m.Len)

				if x.val.Type() != constant.Int {
					c.errorf(pos, "array length is not a constant integer")
					break loop
				}
				length, err = strconv.ParseInt(x.val.String(), 0, 64)
				if err != nil {
					c.errorf(pos, "failed to convert array length into constant integer: %v", err)
					break loop
				}
			}

			typ = NewArray(typ, length)
			n = nil
		default:
			c.errorf(pos, "%s is not a type", n)
			break loop
		}
	}

	return typ
}